CN114526870B - Nondestructive detection device and detection method for dam cut-off wall - Google Patents
Nondestructive detection device and detection method for dam cut-off wall Download PDFInfo
- Publication number
- CN114526870B CN114526870B CN202210159467.5A CN202210159467A CN114526870B CN 114526870 B CN114526870 B CN 114526870B CN 202210159467 A CN202210159467 A CN 202210159467A CN 114526870 B CN114526870 B CN 114526870B
- Authority
- CN
- China
- Prior art keywords
- water
- measuring
- pipe
- seepage
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 title abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 310
- 238000007667 floating Methods 0.000 claims abstract description 74
- 238000003860 storage Methods 0.000 claims abstract description 54
- 238000002347 injection Methods 0.000 claims abstract description 49
- 239000007924 injection Substances 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 41
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 238000012806 monitoring device Methods 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 138
- 229910052742 iron Inorganic materials 0.000 claims description 69
- 239000007787 solid Substances 0.000 claims description 48
- 230000035699 permeability Effects 0.000 claims description 27
- 239000002689 soil Substances 0.000 claims description 16
- 239000004677 Nylon Substances 0.000 claims description 15
- 229920001778 nylon Polymers 0.000 claims description 15
- 238000012544 monitoring process Methods 0.000 claims description 13
- 239000004746 geotextile Substances 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 8
- 238000007689 inspection Methods 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 8
- 238000005553 drilling Methods 0.000 claims description 7
- 238000004088 simulation Methods 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 5
- 239000002390 adhesive tape Substances 0.000 claims description 4
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 2
- 230000008595 infiltration Effects 0.000 claims description 2
- 238000001764 infiltration Methods 0.000 claims description 2
- 230000035515 penetration Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 239000000243 solution Substances 0.000 description 8
- 238000009659 non-destructive testing Methods 0.000 description 5
- 238000010291 electrical method Methods 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 4
- 230000035772 mutation Effects 0.000 description 4
- 230000002265 prevention Effects 0.000 description 4
- 238000012795 verification Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 235000020681 well water Nutrition 0.000 description 2
- 239000002349 well water Substances 0.000 description 2
- 241000264877 Hippospongia communis Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/56—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using elements rigidly fixed to, and rectilinearly moving with, the floats as transmission elements
- G01F23/58—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using elements rigidly fixed to, and rectilinearly moving with, the floats as transmission elements using mechanically actuated indicating means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
- G01K13/02—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow
- G01K13/026—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow of moving liquids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
Landscapes
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Dispersion Chemistry (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Fluid Mechanics (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The invention discloses a nondestructive detection device for a dam impervious wall and a detection method thereof, wherein the nondestructive detection device for the dam impervious wall comprises a constant flow water injection device, a constant temperature control device, a measuring tube, a liquid level automatic monitoring device, a trace-remaining paper tape and a temperature measuring device, wherein the constant flow water injection device is arranged above the measuring tube, and a water outlet of the constant flow water injection device extends into the measuring tube; the heating plate of the constant temperature control device is arranged in the water storage barrel of the constant flow water injection device; a floating ball of the automatic liquid level monitoring device is arranged in the measuring tube, a mark leaving paper tape is arranged right behind a marking pen of the automatic liquid level monitoring device, and the floating ball drives the marking pen on the floating rod to leave a displacement marking point on the mark leaving paper tape when floating; the temperature sensor of the temperature measuring device is arranged in the measuring tube. The method can realize rapid, accurate and nondestructive detection of the seepage-proofing hidden danger part of the dam seepage-proofing wall, is not limited by space environment, does not need an alternating current power supply, and can carry out field detection.
Description
Technical Field
The invention relates to the technical field of dam impervious body detection, in particular to a dam impervious wall nondestructive detection device and a detection method thereof, which are suitable for the quality detection of a dam impervious wall adopting the impervious wall for seepage prevention and forming a closed seepage prevention system by penetrating the bottom of the impervious wall into a relative impervious layer.
Background
The impervious wall is a continuous earth wall which is built in a loose and permeable layer or an earth-rock dam (weir) and plays a role in seepage prevention. The anti-seepage wall has the advantages of reliable structure, good anti-seepage effect, adaptation to various stratum conditions, simple construction, low manufacturing cost and the like, particularly has good effect on treating the hidden danger of seepage deformation such as dam foundation seepage, behind-dam 'soil flow' and 'piping', and is widely applied at home and abroad.
When the dam impervious wall is constructed, the impervious wall has seepage-proofing hidden dangers of cracks, overhead, honeycombs, weak joints, local mud filling and the like due to various reasons. The method can be used for rapidly detecting the positions of hidden dangers of the impervious wall, and has important engineering values for emergency danger removal and danger removal reinforcement. The common detection method for hidden dangers of the impervious wall of the dam comprises destructive detection and nondestructive detection, wherein the destructive detection method mainly comprises a pit detection method and a core drilling method; the nondestructive detection method mainly comprises geophysical prospecting methods such as a geological radar method, a high-density resistivity method, a charging method, a natural potential method and the like.
Because the impervious wall is used as a main impervious body of the dam, damage detection can cause irreversible damage to the impervious wall, so that the seepage-proofing safety of the dam can be influenced; although other nondestructive detection methods are gradually popularized and applied and achieve better application effects, the methods are often limited by space environments and cannot be applied in field environments, for example, a geological radar method is limited by serious attenuation of electromagnetic waves, and effective detection depth is limited; the high-density resistivity method is greatly influenced by the grounding condition, and the detection depth is limited by the length of a measuring line; the charging method can only detect the plane position of the hidden danger part, and the depth information is less; the natural potential method is susceptible to interference of stray currents in the measurement area, and the like.
In addition, the equipment used by the detection method is high in use cost, an alternating current power supply needs to be additionally provided, and the detection method can be operated only by high professional technology, so that the detection method is difficult to meet the requirements when the anti-seepage wall hidden danger detection is needed for small and medium-sized dams which are large in quantity and have crude field conditions in a detection area.
In view of this, the present inventors propose the following.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a dam impervious wall nondestructive testing device and a dam impervious wall nondestructive testing method.
In order to solve the technical problem, the invention adopts the following first technical scheme: the dam cut-off wall nondestructive testing device comprises a constant flow water injection device, a constant temperature control device, a measuring pipe, a liquid level automatic monitoring device, a mark-remaining paper tape and a temperature measuring device, wherein the constant flow water injection device is arranged above the measuring pipe, and a water outlet of the constant flow water injection device extends into the measuring pipe; the heating plate of the constant temperature control device is arranged in the water storage barrel of the constant flow water injection device; a floating ball in the automatic liquid level monitoring device is arranged in a measuring tube, the mark remaining paper tape is arranged right behind a marking pen of the automatic liquid level monitoring device, and the floating ball drives the marking pen on the floating rod to leave a displacement marking point on the mark remaining paper tape when floating; and a temperature sensor of the temperature measuring device is arranged in the measuring tube.
Further, in the above technical solution, the constant flow water injection device comprises a water storage barrel, a water injection port, an air inlet pipe, a shut-off valve, a water outlet pipe, a flow control valve with a flow meter, a power supply fixing support, a wire hole, and a first support; the pipe orifice of the air inlet pipe is higher than the pipe top of the water outlet pipe, so that the water storage barrel injects water into the measuring pipe under a constant water head; the water injection port is positioned at the top of the water storage barrel; the air inlet pipe is positioned on the side wall of the water storage barrel close to the barrel bottom and is controlled by a cut-off valve; the water outlet pipe extends into the water storage barrel, the pipe top of the water outlet pipe is higher than the barrel bottom, and the pipe bottom of the water outlet pipe extends into the measuring pipe; the flow control valve is positioned on the water outlet pipe and used for controlling the flow flowing into the measuring pipe; the power supply fixing support is positioned on the side wall of the water storage barrel and used for fixing a first direct-current power supply of the constant-temperature control device; the wire hole is positioned at the position close to the side wall at the top of the water storage barrel, and the electric lead penetrates out of the wire hole and is hermetically assembled with the wire hole to prevent air from flowing in; the first bracket is positioned at the bottom of the water storage barrel and used for supporting the constant flow water injection device.
Further, in the above technical solution, the constant temperature control device includes a heating plate, a temperature control switch, a first dc power supply, an electrical lead, a solar photovoltaic panel, an electricity storage device, and a second bracket; the heating plate, the temperature control switch, the first direct current power supply and the power storage device are connected in series through electric leads; the heating plate is a 24V constant-temperature PTC aluminum shell ceramic heating plate and is arranged in a water body of the water storage barrel; the temperature control switch is used for controlling the water temperature to keep a certain constant water temperature; the first direct current power supply provides a power supply for the constant temperature control device, and when the electric quantity of the first direct current power supply is insufficient, the solar photovoltaic panel and the electricity storage device are used as a standby power supply to supply power.
Further, in the above technical solution, the number of the measuring pipes is three, and the measuring pipes are respectively arranged on the left side of the adjacent impervious wall, the right side of the adjacent impervious wall, and the downstream side of the dam crest, wherein the depth of the measuring pipe is not less than the height of the impervious wall; the measuring pipe consists of a blind pipe, geotextile and an anti-silt bottom plug; the geotextile is sleeved outside the blind pipe and is fixed by winding the transparent adhesive tape in sections; the silt-proof bottom plug is composed of geotextile, and is plugged into the bottom end of the blind pipe and tightened.
Further, in the above technical solution, the liquid level automatic monitoring device includes a floating rod, a positioning bracket, a floating ball, a fixed sleeve, a micro electric push rod, a marking pen, and a third dc power supply; the floating rod is connected with the floating ball into a whole, and the floating ball floats above the liquid level in the measuring tube; the marking pen consists of a pen sleeve and a pen core, wherein the lower part of the pen sleeve can be sleeved at the front end of the miniature electric push rod, and the pen core is inserted into the center of the upper part of the pen sleeve and is used for leaving a marking point on a mark-leaving paper tape and can be freely pulled out for replacement; the floating ball is a sphere made of a low-density and high-strength buoyancy material; the floating rod is made of a carbon fiber tube which is light, high in strength and high in rigidity; the upper part of the floating rod is engraved with threads to form a screw rod, and the lower part of the floating rod is a smooth surface; the positioning support is arranged near the pipe orifice of the measuring pipe and is formed by welding a bottom ring, two L-shaped connecting pieces and a positioning sleeve, the bottom ring is sleeved on the pipe orifice of the measuring pipe and is fixed by bolts to prevent the positioning support from loosening, the two L-shaped connecting rods are vertically welded at two end points of the diameter of the bottom ring, the other end points of the two L-shaped connecting rods are welded with the outer wall of the positioning sleeve, and the positioning sleeve is a hollow cylindrical iron component; one end of the fixing sleeve is a round nut and is used for fixing the fixing sleeve at different heights of the floating rod, the other end of the fixing sleeve is a rectangular sleeve and is used for fixing the miniature electric push rod, the upper part of the rectangular sleeve is not closed, and the miniature electric push rod is prevented from loosening by adopting bolt fixation; the miniature electric push rod is a linear reciprocating telescopic rod powered by a third direct-current power supply; the third direct current power supply supplies power for the miniature electric push rod, and when the electric quantity of the third direct current power supply is insufficient, the solar photovoltaic panel and the electricity storage device are used as a standby power supply to supply power.
Furthermore, in the above technical scheme, the mark-remaining paper tape is composed of a first concrete base, a second concrete base, a first central shaft, a paper tape, a second central shaft, a second direct-current power supply, a threaded sleeve and a motor; a thread groove with a circular cross section is embedded in the center of the first concrete base; the motor is fixedly installed at the center of the second concrete base, the first central shaft is composed of a first solid iron rod and a first hollow shaft cylinder, threads are carved on the outside of the first solid iron rod, the bottom of the first solid iron rod can be screwed and sleeved in and fixed in a thread groove at the center of the first concrete base, the first hollow shaft cylinder is formed by welding the first hollow iron rod and a first iron disc, one end of a paper tape is wound on the periphery of the first hollow iron rod, the first hollow iron rod is sleeved in the first solid iron rod, the second central shaft is formed by welding a second solid iron rod and a second iron disc, and the other end of the paper tape is directly wound on the second solid iron rod.
Further, in the above technical solution, the first iron disc is used to limit the paper tape to rotate around the first solid iron rod, a nut is sleeved on each of the upper and lower ends of the first hollow shaft cylinder and is installed on the first solid iron rod to control the paper tape on the first central shaft and the second central shaft to be at the same height, and a thread is engraved on the lower part of the second solid iron rod; the motor is a double-shaft motor powered by a direct-current power supply, an upper shaft of the motor is provided with threads, and the upper shaft is connected with the lower part of a second solid iron rod of a second central shaft through a threaded sleeve; and a through hole is reserved in the center of the second concrete base, and a lower shaft of the motor is arranged in the hole and can rotate freely.
Further, in the above technical solution, the temperature measuring device is composed of a multi-channel thermometer, a plurality of temperature sensors electrically connected to the multi-channel thermometer, and a plumb bob; temperature sensor evenly distributed is on the nylon rope, and the plumb is connected to nylon rope tail section, makes temperature sensor evenly distributed in the different degree of depth departments in the survey pipe, and the nylon rope is close to the survey intraductal wall and places in order to prevent that the nylon rope in the survey pipe from taking place the winding with float lever and floater.
In order to solve the above technical problem, the present invention adopts the following second technical solution: the detection method of the nondestructive detection device applying the dam impervious wall comprises the following steps:
s001: when the river/reservoir water level is kept stable, drilling holes on the left side of the dam adjacent to the impervious wall, the right side of the dam adjacent to the impervious wall and the downstream side of the dam crest respectively to install measuring pipes, wherein the depth of each measuring pipe is not less than the river/reservoir water level; performing an indoor permeation test on an undisturbed soil sample obtained by drilling to obtain the permeability coefficient of the dam body soil behind the impervious wall; measuring the water level in the three measuring pipes by using a steel ruler water level gauge until the water level value is kept stable, taking the average value of the last three measured values after the water level reaches the stability as the water level value of the measuring pipe, and respectively naming the water level values in the three measuring pipes as h from the upstream to the downstream of the dam 1 、h 2 、h 3 ；
According to the seepage theory, the Dubuyian seepage line equation of a homogeneous or heterogeneous earth dam on a watertight foundation is used for solving the single-width seepage rate of the dam body as follows:
the permeability coefficient of the dam body soil between two adjacent measuring pipes is as follows:
wherein, K 1-2 Is the permeability coefficient, q is the single-width seepage flow of the dam body, h 1 、h 2 Head, L, of two adjacent measuring tubes 1-2 The horizontal distance between two adjacent measuring tubes; firstly, according to the permeability coefficient K of the dam body soil obtained by the indoor permeability test 2-3 And two measuring pipe water heads h at the back of the impervious wall 2 、h 3 And the horizontal spacing L between the measuring tubes 3 2-3 Substituting the equation (1) to calculate and obtain the single-width seepage flow q of the dam body;
then the calculated single-width seepage flow q of the dam body and the front and rear two measuring pipes 3 water heads h of the impervious wall are measured 1 、h 2 And the horizontal spacing L between the measuring tubes 3 1-2 Substituting the formula (2) to calculate and obtain the permeability coefficient K of the impervious wall 1-2 ；
S002: installing a constant flow water injection device, closing a flow control valve, injecting a certain amount of water into the water storage barrel through a water injection port, and then tightly plugging the water injection port by a rubber plug;
for a complete well near a straight water-resisting boundary, the formula of the water inflow for a no-killing well is as follows:
in the formula, Q is the pressureless well water gushing amount or seepage amount, k is the permeability coefficient of dam soil, H is the distance from reservoir water level to impervious bed, H is the water level in well, R is the influence radius of pressureless well (the vertical distance from the intersection point of reservoir water level and dam body cross section to measuring pipe in the formula), a is the vertical distance from the center of pressureless well to water-proof boundary (the vertical distance from the center of measuring pipe to impervious wall in the formula), and R is the vertical distance from the center of pressureless well to water-proof boundary 0 Is a pressureless well radius;
inputting all parameters into the formula to obtain the water injection flow Q required by keeping a certain fixed water level in the measuring pipe; considering the deviation possibly generated by the theoretical formula calculation, the flow control valve can be adjusted to the Q value of the theoretical calculation, then the flow control valve is continuously adjusted finely, the water level in the measuring pipe is measured until the water level reaches the required fixed water level value, and the debugging is finished when the water seepage amount and the water injection amount of the measuring pipe reach the balance; the seepage conditions under different reservoir water level working conditions can be obtained by approximate simulation through the method;
through the steps, the flow control valve is opened and adjusted, and the measuring pipe on the left side of the impervious wall is controlled to be at different fixed water levels;
s003: installing a liquid level automatic monitoring device, putting a floating rod with a floating ball into the measuring tube to enable the floating rod to float above the water surface, sleeving the positioning bracket near the tube opening of the measuring tube through the floating rod and fixing, sleeving the marking pen at the front end of the miniature electric push rod, sleeving the miniature electric push rod into the fixed sleeve and fixing the miniature electric push rod by using a bolt, and screwing a nut at one end of the fixed sleeve into the floating rod.
S004: installing a mark-remaining paper tape; placing the first concrete base and the second concrete base on the dam crest ground at the rear side of the automatic liquid level monitoring device side by side, and connecting and fixing a second solid iron rod of a second central shaft and an upper shaft of a motor at the center of the second concrete base through a threaded sleeve; screwing a first solid iron rod with a first central shaft into the center of the first concrete base, screwing a nut into the lower part of the first solid iron rod, sleeving a first hollow shaft cylinder of the first central shaft into the first solid iron rod, screwing a nut into the upper part of the first solid iron rod, and adjusting an upper nut and a lower nut to limit the first hollow shaft cylinder at a relatively fixed position, so as to ensure that paper tapes wound on the first central shaft and the second central shaft are positioned at the same height, but paying attention to reserve a certain movable space for the first hollow shaft cylinder and preventing the first hollow sleeve from being blocked; winding a paper tape with a certain length on a first hollow shaft cylinder of a first central shaft, wherein the tail end of the paper tape is fixed on a second solid iron rod of a second central shaft;
s005: simultaneously turning on the liquid level automatic monitoring device and a power switch of the trace paper tape; when the water level in the measuring tube on the right side of the impervious wall rises, the floating ball in the measuring tube drives the marking pen in the automatic liquid level monitoring device to leave a marking point on the mark leaving paper tape, so that a water level-time change curve of the measuring tube behind the impervious wall can be obtained, and the position of the impervious wall with the seepage-proofing hidden danger can be rapidly judged.
S006: installing a constant temperature control device, closing the flow control valve after the steps are completed, and supplementing the water quantity in the water storage barrel through the water filling port; turning on a power switch of the constant temperature control device, and when the water temperature in the water storage barrel is heated to the control temperature of the temperature control switch, putting a temperature sensor of the temperature measuring device into measuring tubes on two sides of the impervious wall along with a nylon rope with a plumb bob; opening the flow control valve, simultaneously opening a switch of a multi-channel thermometer in the temperature measuring device on the left side of the impervious wall, and opening the switch of the multi-channel thermometer in the temperature measuring device on the right side of the impervious wall to start monitoring the change of the water temperature in the measuring tube when the water temperature difference value measured by each temperature sensor in the measuring tube on the left side of the impervious wall is not more than 5 ℃; when the water temperature measured by a certain temperature sensor in the measuring pipe on the right side of the impervious wall is higher than the temperature measured by other sensors by more than 10 ℃, the impervious wall is considered to have obvious seepage-proofing hidden danger, the position of the impervious wall with the seepage-proofing hidden danger is calculated according to the position of the temperature sensor, and the position of the seepage-proofing hidden danger is mutually verified with the position of the seepage-proofing hidden danger obtained by analyzing the water level-time change curve of the measuring pipe.
Further, in the above technical solution, in step S005, the working principle is: when the impervious wall has no seepage-proofing hidden trouble, the simulated water level of the fixed river/reservoir is larger than the actual reservoir water level, the water level of the measuring tube behind the impervious wall can gradually rise under the action of the water head pressure, and when the seepage field is stable, the water level of the measuring tube behind the impervious wall can be kept unchanged; if the seepage-proofing hidden danger exists in the seepage-proofing wall, because the permeability coefficient of the seepage-proofing wall is suddenly increased, the rising speed of the water level of the measuring pipe behind the seepage-proofing wall and the water level value when the water level value is finally stable are both larger than the former condition, the water level-time change curves of the measuring pipe behind the seepage-proofing wall under different reservoir water level simulation working conditions can be contrasted and analyzed, and the approximate position of the seepage-proofing wall where the seepage-proofing hidden danger exists can be judged; and further, when the water level of the measuring pipe behind the impervious wall is kept stable, the permeability coefficients of the impervious wall above the original infiltration line at different vertical positions can be analyzed and calculated according to a formula (3).
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects: in conclusion, the constant flow water injection device is used for controlling the water level in the left side measuring pipe of the impervious wall to be kept unchanged, and the seepage behavior of the dam which is impervious by the impervious wall under different reservoir water levels can be simulated approximately in situ; the method comprises the steps of driving a marking pen to leave marking points on a mark leaving paper tape by utilizing a floating ball floating along with the water level in a measuring pipe, calculating a water level-time change curve in the measuring pipe according to the spatial positions of the marking points, and rapidly judging the position of an anti-seepage wall with anti-seepage hidden danger by comparing and analyzing the water level-time change curves of the measuring pipe under different reservoir water level working conditions; based on the seepage theory, the seepage coefficients of the anti-seepage walls above the original seepage line at different vertical positions can be analyzed and calculated by monitoring the water levels of the measuring pipes under different reservoir water level working conditions; particularly, based on the temperature tracing principle, a constant temperature control device is used for continuously injecting a water source with a certain temperature into the measuring tube adjacent to the left side of the impervious wall, and the water temperature mutation part is obtained by measuring the water temperature in the measuring tube adjacent to the right side of the impervious wall, so that the position range of the impervious hidden danger of the impervious wall is obtained, and mutual verification with the impervious hidden danger position obtained by analyzing the water level-time change curve of the measuring tube can be realized. That is to say, the method can realize rapid, accurate and nondestructive detection of the position of the seepage-proofing hidden danger of the dam impervious wall, has the obvious advantages of no limitation of space environment, no need of an alternating current power supply, automatic monitoring, simple operation method, low manufacturing cost, capability of field detection and the like, and greatly makes up the limitations of common geophysical prospecting methods such as a geological radar method, a high-density electrical method, a surface wave method and the like.
Drawings
FIG. 1 is a schematic view of the overall structure of a nondestructive inspection device for the impervious wall of a dam according to the present invention;
FIG. 2 is an assembly view of a constant flow water injection apparatus and a thermostatic control apparatus according to the present invention;
FIG. 3 is a block diagram of the test tube of the present invention;
FIG. 4 is a partial cross-sectional view of the automatic liquid level monitoring apparatus of the present invention;
FIG. 5 is an assembly view of the automatic liquid level monitoring apparatus of the present invention;
FIG. 6 is an assembly view from another perspective of the automatic liquid level monitoring apparatus of the present invention;
FIG. 7 is an enlarged view of a portion of the construction of the scored paper strap of the present invention;
FIG. 8 is a structural view of the scored tape of the present invention;
FIG. 9 is a structural view of a first center shaft in the present invention;
FIG. 10 is an assembly view of the temperature measuring device of the present invention.
Description of reference numerals: <xnotran> 1, 11, 12, 13, 14, 15, 16, 17, 18, 19, 2, 21, 22, 23, 24, 25, 26, 27, 3, 31, 32, 33, 4, 41, 42, 43, 44, 45, 46, 461, 462, 47, 5, 51, 52, 521, 53, 531, 532, 55, 56, 561, 562, 57, 58, 59, 591, 592, 501 502, 6, 61, 62 63, 64. </xnotran>
Detailed Description
As shown in fig. 1-10, the nondestructive testing device for the impervious wall of the dam comprises a constant flow water injection device 1, a constant temperature control device 2, a measuring tube 3, a liquid level automatic monitoring device 4, a trace-remaining paper tape 5 and a temperature measuring device 6, wherein the constant flow water injection device 1 is arranged above the measuring tube 3, and a water outlet of the constant flow water injection device 1 extends into the measuring tube 3; the heating plate 21 of the constant temperature control device 2 is arranged in the water storage barrel 11 of the constant flow water injection device 1; the measuring pipe 3 is arranged on the left side of the impervious wall and/or the right side of the impervious wall and/or the downstream side of the dam crest; the floating ball 43 in the liquid level automatic monitoring device 4 is arranged in the measuring tube 3, the mark-remaining paper tape 5 is arranged right behind the marking pen 46 of the liquid level automatic monitoring device 4, and the floating ball 43 drives the marking pen 46 on the floating rod 41 to leave a displacement marking point on the mark-remaining paper tape 5 when floating; the temperature sensor 62 of the temperature measuring device 6 is arranged in the measuring tube 3. The invention controls the water level in the left side measuring pipe 3 of the impervious wall to keep unchanged through the constant flow water injection device 1, and can approximate simulate the seepage behavior of the dam which adopts the impervious wall for seepage prevention under different reservoir water levels in situ; the invention utilizes the floating ball 43 floating with the water level in the measuring pipe 3 to drive the marking pen 46 to leave a marking point on the mark-remaining paper tape 5, calculates a water level-time change curve in the measuring pipe 3 according to the space position of the marking point, and rapidly judges the position of the anti-seepage hidden danger of the anti-seepage wall by comparing and analyzing the water level-time change curves of the measuring pipe 3 under different reservoir water level working conditions; based on the seepage theory, the seepage coefficients of the anti-seepage walls above the original seepage line at different vertical positions can be analyzed and calculated by monitoring the water levels of the measuring pipe 3 under different reservoir water level working conditions; particularly, based on the temperature tracing principle, the constant temperature control device 2 is used for continuously injecting a water source with a certain temperature into the measuring tube 3 adjacent to the left side of the impervious wall, and the water temperature mutation part is obtained by measuring the water temperature in the measuring tube 3 adjacent to the right side of the impervious wall, so that the position range of the impervious hidden danger of the impervious wall is obtained, and the mutual verification of the impervious hidden danger position obtained by analyzing the water level-time change curve of the measuring tube 3 can be realized. That is, the method can realize rapid, accurate and nondestructive detection of the position of the seepage-proofing hidden danger of the dam seepage-proofing wall, has the obvious advantages of no limitation of space environment, no need of alternating current power supply, automatic monitoring, simple operation method, low cost, capability of field detection and the like, and greatly makes up the limitation of common geophysical prospecting methods such as a geological radar method, a high-density electrical method, a surface wave method and the like.
The constant flow water injection device 1 adopts a mahalanobis bottle water supply principle to provide a constant flow, and specifically, as shown in fig. 2, the constant flow water injection device 1 comprises a water storage barrel 11, a water injection port 12, an air inlet pipe 13, a shut-off valve 14, a water outlet pipe 15, a flow control valve 16 with a flow meter, a power supply fixing support 17, a wire hole 18 and a first support 19.
As shown in fig. 2, the first bracket 19 is located at the bottom of the water storage tank 11 and is used for supporting the constant flow water injection device 1. The pipe orifice of the air inlet pipe 13 is higher than the pipe top of the water outlet pipe 15, so that the water storage barrel 11 injects water into the measuring pipe 3 under a constant water head; the water injection port 12 is positioned at the top of the water storage barrel 11 and is plugged and sealed by a rubber plug after a certain amount of water is injected into the barrel. The air inlet pipe 13 is positioned on the side wall of the water storage barrel 11 close to the barrel bottom, and the air inlet pipe 13 is controlled by a cut-off valve 14; the water outlet pipe 15 extends into the water storage barrel 11, the pipe top of the water outlet pipe 15 is higher than the barrel bottom but lower than the pipe orifice of the air inlet pipe 13, and the pipe bottom of the water outlet pipe 15 extends into the measuring pipe 3; the flow control valve 16 is positioned on the water outlet pipe 15 and used for controlling the flow flowing into the measuring pipe 3; the power supply fixing bracket 17 is positioned on the side wall of the water storage barrel 11 and is used for fixing a first direct current power supply 23 of the constant temperature control device 2; the thread hole 18 is located at the top of the water storage barrel 11 near the side wall, and the electric lead 24 penetrates through the thread hole 18 and is hermetically assembled with the thread hole 18 to prevent air from flowing in, so that the airtightness of the inner cavity of the water storage barrel 11 is ensured.
With reference to fig. 2, the thermostatic control device 2 includes a heating plate 21, a temperature control switch 22, a first direct current power supply 23, an electrical conductor 24, a solar photovoltaic panel 25, an electricity storage device 26, and a second bracket 27; the heating plate 21, the temperature control switch 22, the first direct current power supply 23 and the power storage device 26 are connected in series through an electric lead 24; the heating plate 21 adopts a 24V constant-temperature PTC aluminum shell ceramic heating plate and is arranged in the water body of the water storage barrel 11; the temperature control switch 22 is used for controlling the water temperature to keep a certain constant water temperature; the first direct current power supply 23 supplies power to the constant temperature control device 2, when the electric quantity of the first direct current power supply 23 is insufficient, the solar photovoltaic panel 25 and the electricity storage device 26 are used as standby power supplies to supply power, namely, alternating current is not needed, the first direct current power supply 23 is firstly used for supplying power to the constant temperature control device 2, when the electric quantity of the first direct current power supply 23 is insufficient, the solar photovoltaic panel 25 and the electricity storage device 26 are used as standby power supplies to supply power, and the use is more convenient.
With reference to fig. 1-2, the number of the measuring pipes 3 is three, and the measuring pipes are respectively arranged on the left side adjacent to the impervious wall, the right side adjacent to the impervious wall, and the downstream side of the dam crest, wherein the depth of the measuring pipe 3 is not less than the height of the impervious wall; the measuring pipe 3 consists of a blind pipe 31, geotechnical cloth 32 and an anti-silt bottom plug 33; the geotextile 32 is sheathed outside the blind pipe 31 and is fixed by winding the transparent adhesive tape in sections; the silt-proof bottom plug 33 is made of geotextile, and is plugged into the bottom end of the blind pipe 31 and tightened. Specifically, after an original well hole is formed by drilling a hole in the dam, the geotextile 32 is wrapped around the blind pipe 31, and then the blind pipe is easily inserted into the hole by winding the transparent adhesive tape in sections; the blind pipe 31 has better water permeability, pressure resistance and deformation adaptability; the silt-proof bottom plug 33 is positioned at the bottom end of the measuring pipe 3 and is composed of geotextile, and the silt-proof bottom plug needs to be tightened to prevent falling off after being plugged into the pipe bottom.
Referring to fig. 4-6, the automatic liquid level monitoring device 4 includes a floating rod 41, a positioning bracket 42, a floating ball 43, a fixing sleeve 44, a micro electric push rod 45, a marking pen 46, and a third dc power supply 47.
Specifically, the floating rod 41 and the floating ball 43 are connected into a whole, and the floating ball 43 floats above the liquid level in the measuring tube 3; the floating ball 43 is a sphere made of a low-density and high-strength buoyancy material; the floating rod 41 is made of a carbon fiber tube with light weight, high strength and high rigidity; the upper part of the floating rod 41 is carved with threads to form a screw rod, and the lower part of the floating rod is a smooth surface; the positioning support 42 is arranged near the pipe orifice of the measuring pipe 3, the positioning support 42 is formed by welding a bottom ring, two L-shaped connecting pieces and a positioning sleeve, the bottom ring is sleeved on the pipe orifice of the measuring pipe 3 and is fixed by bolts to prevent the positioning support 42 from loosening, the two L-shaped connecting rods are vertically welded at two end points of the diameter of the bottom ring, the other end points of the two L-shaped connecting rods are welded with the outer wall of the positioning sleeve, and the positioning sleeve is a hollow cylindrical iron component; one end of the fixing sleeve 44 is a round nut for fixing the fixing sleeve 44 at different heights of the floating rod 41, the other end of the fixing sleeve 44 is a rectangular sleeve for fixing the miniature electric push rod 45, the upper part of the rectangular sleeve is not closed, and the miniature electric push rod 45 is prevented from loosening by adopting bolt fixation; the miniature electric push rod 45 is a linear reciprocating telescopic rod powered by a third direct current power supply 47, the working voltage of the miniature electric push rod is 12VDC, the current of the miniature electric push rod is 0.3A, and the reciprocating working frequency of the miniature electric push rod is 0.2 times/min.
Referring to fig. 6, the marking pen 46 comprises a pen cap 461 and a pen core 462, the lower part of the pen cap 461 can be sleeved at the front end of the micro electric push rod 45, the pen core 462 is inserted into the center of the upper part of the pen cap 461, and is used for leaving a marking point on the marking paper tape 5 and can be freely pulled out for replacement, so that the use is more convenient; the third DC power supply 47 supplies power for the miniature electric push rod 45, and when the third DC power supply 47 is insufficient in electric quantity, the solar photovoltaic panel 25 and the electricity storage device 26 are used as a standby power supply to supply power, so that the use is more convenient.
As shown in fig. 7 to 9, the marking paper tape 5 is composed of a first concrete base 51, a second concrete base 52, a first central shaft 53, a paper tape 55, a second central shaft 56, a second dc power supply 57, a threaded sleeve 58, and a motor 59.
Specifically, a thread groove with a circular cross section is embedded in the center of the first concrete base 51; the motor 59 is fixedly installed at the center of the second concrete base 52, a through hole 521 is reserved at the center of the second concrete base 52, and a lower shaft 591 of the motor 59 is placed in the hole 521 and can freely rotate; the first central shaft 53 is composed of a first solid iron rod 531 and a first hollow shaft cylinder 532, threads are engraved outside the first solid iron rod 531, the bottom of the first solid iron rod 531 can be screwed and sleeved in and fixed in a thread groove in the center of the first concrete base 51, the first hollow shaft cylinder 532 is formed by welding a first hollow iron rod 501 and a first iron disc 502, one end of a paper tape 55 is wound on the periphery of the first hollow iron rod 501, the first hollow iron rod 501 is sleeved in the first solid iron rod 531, the first iron disc 502 is used for limiting the rotation of the paper tape 55 around the first solid iron rod 531, a nut is sleeved at the upper end and the lower end of the first hollow shaft cylinder 532 respectively and is installed on the first solid iron rod 531 for controlling the height of the paper tape 55 on the first central shaft 53 and the height of the paper tape 55 on the second central shaft 56; the second central shaft 56 is formed by welding a second solid iron rod 561 and a second iron disk 562, the other end of the paper tape 55 is directly wound on the second solid iron rod 561, and threads are carved on the lower portion of the second solid iron rod 561; the motor 59 is a double-shaft motor powered by a direct current power supply, an upper shaft 592 of the motor 59 is threaded, and the upper shaft 592 is connected with the lower portion of a second solid iron rod 561 of the second central shaft 56 through a threaded sleeve 58.
Referring to fig. 10, the temperature measuring device 6 is composed of a multichannel thermometer 61, a plurality of temperature sensors 62 electrically connected to the multichannel thermometer 61, and a plumb 63; the temperature sensors 62 are uniformly distributed on the nylon ropes 64, the tail sections of the nylon ropes 64 are connected with the plumbs 63, so that the temperature sensors 62 are uniformly distributed at different depths in the measuring tube 3, and the nylon ropes 64 are placed close to the inner wall of the measuring tube 3 to prevent the nylon ropes 64 in the measuring tube 3 from being wound with the floating rods 41 and the floating balls 43.
In conclusion, the constant flow water injection device 1 is used for controlling the water level in the left side measuring pipe 3 of the impervious wall to keep unchanged, and the seepage behavior of the dam which is impervious by the impervious wall under different reservoir water levels can be simulated approximately in situ; the invention utilizes the floating ball 43 floating with the water level in the measuring tube 3 to drive the marking pen 46 to leave a marking point on the mark-remaining paper tape 5, calculates the water level-time change curve in the measuring tube 3 according to the space position of the marking point, and rapidly judges the position of the anti-seepage hidden danger in the anti-seepage wall by comparing and analyzing the water level-time change curves of the measuring tube 3 under different reservoir water level working conditions; based on the seepage theory, the seepage coefficients of the anti-seepage walls above the original seepage line at different vertical positions can be analyzed and calculated by monitoring the water levels of the measuring pipe 3 under different reservoir water level working conditions; particularly, based on the temperature tracing principle, the constant temperature control device 2 is used for continuously injecting a water source with a certain temperature into the measuring tube 3 adjacent to the left side of the impervious wall, and the water temperature mutation part is obtained by measuring the water temperature in the measuring tube 3 adjacent to the right side of the impervious wall, so that the position range of the impervious hidden danger of the impervious wall is obtained, and mutual verification with the impervious hidden danger position obtained by analyzing the water level-time change curve of the measuring tube 3 can be realized. That is, the method can realize rapid, accurate and nondestructive detection of the position of the seepage-proofing hidden danger of the dam seepage-proofing wall, has the obvious advantages of no limitation of space environment, no need of alternating current power supply, automatic monitoring, simple operation method, low cost, capability of field detection and the like, and greatly makes up the limitation of common geophysical prospecting methods such as a geological radar method, a high-density electrical method, a surface wave method and the like.
The invention also provides a dam impervious wall nondestructive testing method, which comprises the following steps:
s001: when the river/reservoir water level is kept stable, the left side of the dam adjacent to the impervious wall, the right side of the dam adjacent to the impervious wall and the downstream side of the dam top are respectively drilled and provided with a measuring pipe3, the depth of the measuring pipe 3 is not less than the water level of a river/reservoir; performing indoor permeability test on an undisturbed soil sample obtained by drilling to obtain the permeability coefficient of dam body soil behind the impervious wall; measuring the water level in the three measuring tubes 3 by using a steel ruler water level meter until the water level value is kept stable, taking the average value of the last three measured values after the water level reaches the stability as the water level value of the measuring tube 3, and respectively naming the water level values in the three measuring tubes 3 as h from the upstream to the downstream of the dam 1 、h 2 、h 3 ；
According to the seepage theory, the single-width seepage flow of the dam body is obtained by a Dubuyian seepage line equation of a homogeneous or heterogeneous earth dam on a watertight foundation:
the permeability coefficient of the dam body soil between two adjacent measuring pipes is as follows:
wherein, K 1-2 Is the permeability coefficient, q is the single-width seepage flow of the dam body, h 1 、h 2 Head, L, of two adjacent measuring tubes 1-2 The horizontal distance between two adjacent measuring tubes; firstly, according to the permeability coefficient K of the dam body soil obtained by the indoor permeability test 2-3 Two measuring tube water heads h behind impervious wall 2 、h 3 And the horizontal spacing L between the measuring tubes 3 2-3 Substituting the formula (1) to calculate and obtain the single-width seepage q of the dam body;
then the calculated single-width seepage flow q of the dam body and the front and rear two measuring pipes 3 water heads h of the impervious wall are measured 1 、h 2 And the horizontal spacing L between the measuring tubes 3 1-2 Substituting the formula (2) to calculate and obtain the permeability coefficient K of the impervious wall 1-2 。
S002: installing a constant flow water injection device 1, closing a flow control valve 16, injecting a certain amount of water into a water storage barrel 11 through a water injection port 12, and then tightly plugging the water injection port 12 by a rubber plug;
for a complete well near a straight water-resisting boundary, the formula of water inflow for a no-killing well is as follows:
in the formula, Q is the pressureless well water gushing amount or seepage amount, k is the permeability coefficient of dam soil, H is the distance from the reservoir water level to the impervious bed, H is the water level in the well, R is the influence radius of the pressureless well (the vertical distance from the intersection point of the reservoir water level and the dam body cross section to the measuring pipe 3 in the formula), a is the vertical distance from the center of the pressureless well to the water-resisting boundary (the vertical distance from the center of the measuring pipe 3 to the impervious wall in the formula), and R is the vertical distance from the center of the pressureless well to the water-resisting boundary 0 Is a pressureless well radius.
Inputting all parameters into the formula, so as to obtain the water injection flow Q required by keeping a certain fixed water level in the measuring tube 3; considering the deviation possibly generated by the theoretical formula calculation, the flow control valve 16 can be adjusted to the Q value of the theoretical calculation, then the flow control valve 16 is continuously adjusted finely and the water level in the measuring tube 3 is measured until the water level reaches the required fixed water level value, and the debugging is finished when the water seepage amount and the water injection amount of the measuring tube 3 reach the balance; the seepage conditions under different reservoir water level working conditions can be obtained by approximate simulation through the method;
through the steps, the flow control valve 16 is opened and adjusted, and the measuring pipe 3 on the left side of the impervious wall is controlled to be at different fixed water levels;
s003: installing the liquid level automatic monitoring device 4, placing the floating rod 41 with the floating ball 43 into the measuring tube 3 to enable the floating rod to float above the water surface, sleeving the positioning bracket 42 to the vicinity of the tube opening of the measuring tube 3 through the floating rod 41 and fixing, sleeving the marking pen 46 at the front end of the miniature electric push rod 45, sleeving the miniature electric push rod 45 into the fixed sleeve 44 and fixing the miniature electric push rod by using a bolt, and screwing the nut at one end of the fixed sleeve 44 into the floating rod 41.
S004: installing a mark-remaining paper tape 5; placing the first concrete base 51 and the second concrete base 52 side by side on the dam crest ground at the rear side of the automatic liquid level monitoring device 4, and connecting and fixing a second solid iron rod 561 of the second central shaft 56 and an upper shaft 592 of a motor 59 at the center of the second concrete base 52 through a threaded sleeve 58; screwing a first solid iron rod 531 with a first central shaft 53 into the center of the first concrete base 51, screwing a nut to the lower part of the first solid iron rod 531, sleeving a first hollow shaft cylinder 532 of the first central shaft 53 into the first solid iron rod 531, screwing a nut into the upper part of the first solid iron rod 531, adjusting an upper nut and a lower nut to limit the first hollow shaft cylinder 532 to a relatively fixed position, ensuring that paper tapes 55 wound on the first central shaft 53 and a second central shaft 56 are positioned at the same height, and paying attention to reserve a certain movable space for the first hollow shaft cylinder 532 to prevent the first hollow sleeve from being blocked; a length of paper tape 55 is wound around the first hollow shaft cylinder 532 of the first central shaft 53, and the end of the paper tape 55 is fixed to the second solid iron bar 561 of the second central shaft 56;
s005: simultaneously turning on the power switches of the liquid level automatic monitoring device 4 and the mark-remaining paper tape 5; when the water level in the measuring tube 3 on the right side of the impervious wall rises, the floating ball 43 in the measuring tube 3 drives the marking pen 46 in the automatic liquid level monitoring device 4 to leave a marking point on the mark leaving paper tape 5, so that the water level-time change curve of the measuring tube 3 behind the impervious wall can be obtained, and the position of the impervious wall with the seepage-proofing hidden danger can be rapidly judged.
S006: installing the thermostatic control device 2, closing the flow control valve 16 after the steps are finished, and supplementing the water quantity in the water storage barrel 11 through the water filling port 12; turning on a power switch of the constant temperature control device 2, and when the temperature of the water in the water storage barrel 11 is heated to the control temperature of the temperature control switch 22, placing a temperature sensor 62 of the temperature measuring device 6 into the measuring tubes 3 at two sides of the impervious wall along with a nylon rope 64 with a plumb 63; then the flow control valve 16 is opened, the switch of the multichannel temperature instrument 61 in the temperature measuring device 6 on the left side of the impervious wall is opened, when the temperature difference value of water measured by each temperature sensor 62 in the measuring tube 3 on the left side of the impervious wall is not more than 5 ℃, the switch of the multichannel temperature instrument 61 in the temperature measuring device 6 on the right side of the impervious wall is opened, and the change of the water temperature in the measuring tube 3 is monitored; when the water temperature measured by a certain temperature sensor 62 in the measuring tube 3 on the right side of the impervious wall is higher than the temperature measured by other sensors by more than 10 ℃, the impervious wall at the position is considered to have obvious seepage-proofing hidden danger, the position of the impervious wall with the seepage-proofing hidden danger is calculated according to the position of the temperature sensor 62 at the position, and the position is mutually verified with the position of the seepage-proofing hidden danger obtained by analyzing the water level-time change curve of the measuring tube 3.
In step S005, the operation principle is: when the impervious wall has no seepage-proofing hidden trouble, the water level of the measuring tube 3 behind the impervious wall can gradually rise under the action of the water head pressure under the working condition that the simulated water level of the fixed river/reservoir is greater than the actual reservoir water level, and when the seepage field is stable, the water level of the measuring tube 3 behind the impervious wall can be kept unchanged; if the seepage-proofing hidden danger exists in the seepage-proofing wall, because the permeability coefficient of the seepage-proofing wall is suddenly increased, the rising speed of the water level of the measuring pipe 3 behind the seepage-proofing wall and the water level value when the water level finally reaches stability are both larger than the former condition, the water level-time change curves of the measuring pipe 3 behind the seepage-proofing wall under different reservoir water level simulation working conditions can be contrasted and analyzed, and the approximate position of the seepage-proofing hidden danger existing in the seepage-proofing wall can be judged; and further, when the water level of the measuring pipe 3 behind the impervious wall is kept stable, the permeability coefficients of the impervious wall above the original seepage line at different vertical positions can be analyzed and calculated according to the formula (3).
And the measuring tube 3 behind the impervious wall is the measuring tube 3 on the right side of the impervious wall.
In conclusion, the constant flow water injection device 1 is used for controlling the water level in the left side measuring pipe 3 of the impervious wall to keep unchanged, and the seepage behavior of the dam which is impervious by the impervious wall under different reservoir water levels can be simulated approximately in situ; the invention utilizes the floating ball 43 floating with the water level in the measuring pipe 3 to drive the marking pen 46 to leave a marking point on the mark-remaining paper tape 5, calculates a water level-time change curve in the measuring pipe 3 according to the space position of the marking point, and rapidly judges the position of the anti-seepage hidden danger of the anti-seepage wall by comparing and analyzing the water level-time change curves of the measuring pipe 3 under different reservoir water level working conditions; based on the seepage theory, the seepage coefficients of the part of the impervious wall above the original seepage line at different vertical positions can be analyzed and calculated by monitoring the water levels of the measuring pipe 3 under different reservoir water level working conditions; particularly, based on the temperature tracing principle, the constant temperature control device 2 is used for continuously injecting a water source with a certain temperature into the measuring tube 3 adjacent to the left side of the impervious wall, and the water temperature mutation part is obtained by measuring the water temperature in the measuring tube 3 adjacent to the right side of the impervious wall, so that the position range of the impervious hidden danger of the impervious wall is obtained, and the mutual verification of the impervious hidden danger position obtained by analyzing the water level-time change curve of the measuring tube 3 can be realized. That is, the method can realize rapid, accurate and nondestructive detection of the position of the seepage-proofing hidden danger of the dam seepage-proofing wall, has the obvious advantages of no limitation of space environment, no need of alternating current power supply, automatic monitoring, simple operation method, low cost, capability of field detection and the like, and greatly makes up the limitation of common geophysical prospecting methods such as a geological radar method, a high-density electrical method, a surface wave method and the like.
It should be understood that the above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims.
Claims (6)
1. The utility model provides a dykes and dams cut-off wall nondestructive test device which characterized in that: the device comprises a constant flow water injection device (1), a constant temperature control device (2), a measuring pipe (3), a liquid level automatic monitoring device (4), a mark remaining paper tape (5) and a temperature measuring device (6), wherein the constant flow water injection device (1) is arranged above the measuring pipe (3), and a water outlet of the constant flow water injection device (1) extends into the measuring pipe (3); the heating plate (21) of the constant temperature control device (2) is arranged in the water storage barrel (11) of the constant flow water injection device (1); a floating ball (43) in the liquid level automatic monitoring device (4) is arranged in the measuring tube (3), the mark remaining paper tape (5) is arranged right behind a marking pen (46) of the liquid level automatic monitoring device (4), and the floating ball (43) drives the marking pen (46) on the floating rod (41) to leave a displacement marking point on the mark remaining paper tape (5) when floating; the temperature sensor (62) of the temperature measuring device (6) is arranged in the measuring tube (3);
the number of the measuring pipes (3) is three, and the measuring pipes are respectively arranged on the left side of the adjacent impervious wall, the right side of the adjacent impervious wall and the downstream side of the dam crest, wherein the depth of each measuring pipe (3) is not less than the height of the impervious wall; the measuring pipe (3) consists of a blind pipe (31), geotechnical cloth (32) and an anti-silting bottom plug (33); the geotextile (32) is sheathed outside the blind pipe (31) and is fixed by winding a transparent adhesive tape in sections; the silt-proof bottom plug (33) is composed of geotextile, and is plugged into the bottom end of the blind pipe (31) and tightened;
the liquid level automatic monitoring device (4) comprises a floating rod (41), a positioning support (42), a floating ball (43), a fixed sleeve (44), a micro electric push rod (45), a marking pen (46) and a third direct current power supply (47); the floating rod (41) and the floating ball (43) are connected into a whole, and the floating ball (43) floats above the liquid level in the measuring tube (3); the marking pen (46) consists of a pen sleeve (461) and a pen core (462), the lower part of the pen sleeve (461) can be sleeved at the front end of the miniature electric push rod (45), and the pen core (462) is inserted into the center of the upper part of the pen sleeve (461) and is used for leaving a marking point on the mark-remaining paper tape (5) and can be freely pulled out for replacement; the floating ball (43) is a sphere made of a low-density and high-strength buoyancy material; the floating rod (41) is a carbon fiber tube which is light, high in strength and high in rigidity; the upper part of the floating rod (41) is carved with threads to form a screw rod, and the lower part of the floating rod is a smooth surface; the positioning support (42) is arranged near the pipe orifice of the measuring pipe (3), the positioning support (42) is formed by welding a bottom ring, two L-shaped connecting pieces and a positioning sleeve, the bottom ring is sleeved on the pipe orifice of the measuring pipe (3), the positioning support (42) is prevented from loosening by adopting bolt fixation, the two L-shaped connecting rods are vertically welded at two end points of the diameter of the bottom ring, the other end points of the two L-shaped connecting rods are welded with the outer wall of the positioning sleeve, and the positioning sleeve is a hollow cylindrical iron component; one end of the fixing sleeve (44) is a round nut and is used for fixing the fixing sleeve (44) at different heights of the floating rod (41), the other end of the fixing sleeve (44) is a rectangular sleeve and is used for fixing the miniature electric push rod (45), the upper part of the rectangular sleeve is not closed, and the miniature electric push rod (45) is prevented from loosening by adopting bolt fixation; the miniature electric push rod (45) is a linear reciprocating telescopic rod powered by a third direct-current power supply (47); the third direct-current power supply (47) supplies power to the miniature electric push rod (45), and when the electric quantity of the third direct-current power supply (47) is insufficient, the solar photovoltaic panel (25) and the power storage device (26) are used as standby power supplies for supplying power;
the mark-remaining paper tape (5) consists of a first concrete base (51), a second concrete base (52), a first central shaft (53), a paper tape (55), a second central shaft (56), a second direct-current power supply (57), a threaded sleeve (58) and a motor (59); a thread groove with a circular cross section is embedded in the center of the first concrete base (51); the motor (59) is fixedly installed at the center of the second concrete base (52), the first central shaft (53) is composed of a first solid iron rod (531) and a first hollow shaft cylinder (532), threads are engraved on the outer side of the first solid iron rod (531), the bottom of the first solid iron rod (531) can be screwed and sleeved in and fixed in a thread groove in the center of the first concrete base (51), the first hollow shaft cylinder (532) is formed by welding a first hollow iron rod (501) and a first iron disc (502), after one end of the paper tape (55) is wound on the periphery of the first hollow iron rod (501), the first hollow iron rod (501) is sleeved in the first solid iron rod (531), the second central shaft (56) is formed by welding a second solid iron rod (561) and a second iron disc (562), and the other end of the paper tape (55) is directly wound on the second solid iron rod (561);
the first iron disc (502) is used for limiting the paper tape (55) to rotate around a first solid iron rod (531), a nut is sleeved at the upper end and the lower end of a first hollow shaft cylinder (532) respectively and is installed on the first solid iron rod (531) to control the first central shaft (53) and the paper tape (55) on a second central shaft (56) to be at the same height, and threads are carved on the lower portion of the second solid iron rod (561); the motor (59) is a double-shaft motor powered by a direct-current power supply, an upper shaft (592) of the motor (59) is provided with threads, and the upper shaft (592) is connected with the lower part of a second solid iron rod (561) of the second central shaft (56) through a threaded sleeve (58); and a through hole (521) is reserved in the center of the second concrete base (52), and a lower shaft (591) of the motor (59) is arranged in the hole (521) and can rotate freely.
2. The nondestructive inspection apparatus for dam cut-off wall according to claim 1, wherein: the constant flow water injection device (1) comprises a water storage barrel (11), a water injection port (12), an air inlet pipe (13), a cut-off valve (14), a water outlet pipe (15), a flow control valve (16) with a flow meter, a power supply fixing support (17), a wire hole (18) and a first support (19); the pipe orifice of the air inlet pipe (13) is higher than the pipe top of the water outlet pipe (15), so that the water storage barrel (11) injects water into the measuring pipe (3) under a constant water head; the water filling port (12) is positioned at the top of the water storage barrel (11); the air inlet pipe (13) is positioned on the side wall of the water storage barrel (11) close to the barrel bottom, and the air inlet pipe (13) is controlled by a cut-off valve (14); the water outlet pipe (15) extends into the water storage barrel (11), the pipe top of the water outlet pipe (15) is higher than the barrel bottom, and the pipe bottom of the water outlet pipe (15) extends into the measuring pipe (3); the flow control valve (16) is positioned on the water outlet pipe (15) and is used for controlling the flow flowing into the measuring pipe (3); the power supply fixing support (17) is positioned on the side wall of the water storage barrel (11) and is used for fixing a first direct current power supply (23) of the constant temperature control device (2); the wire hole (18) is positioned at the top of the water storage barrel (11) close to the side wall, and the electric lead (24) penetrates out of the wire hole (18) and is in sealed assembly with the wire hole (18) to prevent air from flowing in; the first support (19) is positioned at the bottom of the water storage barrel (11) and used for supporting the constant flow water injection device (1).
3. The nondestructive inspection device for dam cut-off wall according to claim 1, characterized in that: the constant temperature control device (2) comprises a heating plate (21), a temperature control switch (22), a first direct current power supply (23), an electric lead (24), a solar photovoltaic plate (25), an electricity storage device (26) and a second bracket (27); the heating plate (21), the temperature control switch (22), the first direct current power supply (23) and the power storage device (26) are connected in series through an electric lead (24); the heating plate (21) adopts a 24V constant-temperature PTC aluminum shell ceramic heating plate and is arranged in the water body of the water storage barrel (11); the temperature control switch (22) is used for controlling the water temperature to keep a certain constant water temperature; the first direct current power supply (23) provides a power supply for the constant temperature control device (2), and when the electric quantity of the first direct current power supply (23) is insufficient, the solar photovoltaic panel (25) and the power storage device (26) are used as a standby power supply to supply power.
4. The nondestructive inspection apparatus for dam cut-off wall according to claim 1, wherein: the temperature measuring device (6) consists of a multi-channel thermometer (61), a plurality of temperature sensors (62) electrically connected with the multi-channel thermometer (61) and a plumb bob (63); temperature sensor (62) evenly distributed is on nylon rope (64), and plumb bob (63) are connected to nylon rope (64) tail section, makes temperature sensor (62) evenly distributed different degree departments in survey pipe (3), and nylon rope (64) are close to survey pipe (3) inner wall and place nylon rope (64) and float (41) and floater (43) in order to prevent to survey pipe (3) and take place the winding.
5. An inspection method using the nondestructive inspection apparatus for dam cut-off walls according to any one of claims 1 to 4, characterized in that: which comprises the following steps:
s001: when the river/reservoir water level is kept stable, drilling holes on the left side of the dam adjacent to the impervious wall, the right side of the dam adjacent to the impervious wall and the downstream side of the dam crest respectively to install measuring pipes (3), wherein the depth of each measuring pipe (3) is not less than the river/reservoir water level; performing an indoor permeation test on an undisturbed soil sample obtained by drilling to obtain the permeability coefficient of the dam body soil behind the impervious wall; measuring the water level in the three measuring pipes (3) by using a steel ruler water level meter until the water level value is kept stable, taking the average value of the last three measured values after the water level reaches the stability as the water level value of the measuring pipe (3), and respectively naming the water level value in the three measuring pipes (3) from the upstream to the downstream of the dam as the water level value of the measuring pipe (3)
；
According to the seepage theory, the Dubuyian seepage line equation of a homogeneous or heterogeneous earth dam on a watertight foundation is used for solving the single-width seepage rate of the dam body as follows:
(1) And the permeability coefficient of the dam body soil between two adjacent measuring pipes is as follows: />
（2）；
Wherein,
is a penetration factor->
Is the single wide seepage quantity of the dam body>
The water heads of two adjacent measuring tubes (3) are combined>
The horizontal distance between two adjacent measuring tubes (3); firstly, according to the dam soil permeability coefficient obtained by the indoor permeability test>
And water heads of two measuring pipes (3) behind the impervious wall are combined>
And the horizontal spacing between the measuring tubes 3->
Substituting the formula (1) to calculate and obtain the single-width seepage flow rate of the dam body>
；
Then the single-width seepage flow of the dam body obtained by calculation is calculated
Front and back two measuring tubes of the impervious wall have 3 water heads>
And a horizontal spacing between the measuring tubes 3>
Substituting the formula (2) to calculate and obtain the permeation coefficient of the impermeable wall>
；
S002: installing a constant flow water injection device (1), closing a flow control valve (16), injecting a certain amount of water into a water storage barrel (11) through a water injection port (12), and then tightly plugging and sealing the water injection port (12) by a rubber plug;
for a complete well near a straight water-resisting boundary, the formula of water inflow for a no-killing well is as follows:
（3）；
in the formula,
is the non-pressure well kick water quantity or the seeping water quantity>
Is the permeability coefficient of dam soil>
Is the distance from the reservoir water level to the impermeable layer>
Is the water level in the well, is greater or less>
For influencing the radius of a well without pressure>
Is the vertical distance from the center of the pressureless well to the water-proof boundary>
Is a pressureless well radius;
inputting all parameters into the formula, the water injection flow rate required by keeping a certain fixed water level in the measuring pipe (3) can be obtained
(ii) a In view of the possible deviations calculated by the theoretical formula, the flow control valve (16) can now be adjusted to theoretically calculated->
Continuously fine-adjusting the flow control valve (16) and measuring the water level in the measuring tube (3) until the water level reaches the required fixed water level value, and finishing debugging when the water seepage amount and the water injection amount of the measuring tube (3) reach balance; the seepage conditions under different reservoir water level working conditions can be obtained by approximate simulation through the method;
through the steps, the flow control valve (16) is opened and adjusted, and the measuring pipe (3) on the left side of the impervious wall is controlled to be at different fixed water levels;
s003: installing a liquid level automatic monitoring device (4), placing a floating rod (41) with a floating ball (43) into the measuring tube (3) to enable the floating rod to float above the water surface, sleeving a positioning support (42) near the tube opening of the measuring tube (3) through the floating rod (41) and fixing, sleeving a marking pen (46) at the front end of a micro electric push rod (45), sleeving the micro electric push rod (45) into a fixed sleeve (44) and fixing the micro electric push rod by using a bolt, and screwing a nut at one end of the fixed sleeve (44) into the floating rod (41);
s004: installing a mark-remaining paper tape (5); placing a first concrete base (51) and a second concrete base (52) on the dam crest ground at the rear side of the automatic liquid level monitoring device (4) side by side, and connecting and fixing a second solid iron rod (561) of a second central shaft (56) and an upper shaft (592) of a motor (59) at the center of the second concrete base (52) through a threaded sleeve (58); screwing a first solid iron rod (531) with a first central shaft (53) into the center of a first concrete base (51), screwing a nut to the lower part of the first solid iron rod (531), sleeving a first hollow shaft cylinder (532) of the first central shaft (53) into the first solid iron rod (531), screwing a nut into the upper part of the first solid iron rod (531), and simultaneously adjusting the upper nut and the lower nut to limit the first hollow shaft cylinder (532) to a relatively fixed position, so that paper tapes (55) wound on the first central shaft (53) and a second central shaft (56) are ensured to be positioned at the same height, but a certain movable space is reserved for the first hollow shaft cylinder (532) to prevent the first hollow sleeve from being blocked; winding a certain length of paper tape (55) on a first hollow shaft cylinder (532) of a first central shaft (53), wherein the tail end of the paper tape (55) is fixed on a second solid iron rod (561) of a second central shaft (56);
s005: simultaneously turning on a power switch of the liquid level automatic monitoring device (4) and the mark-remaining paper tape (5); when the water level in the measuring tube (3) on the right side of the impervious wall rises, a floating ball (43) in the measuring tube (3) drives a marking pen (46) in the automatic liquid level monitoring device (4) to leave a marking point on the mark-remaining paper tape (5), so that a water level-time change curve of the measuring tube (3) behind the impervious wall can be obtained, and the position of the impervious wall with the seepage-proofing hidden danger can be quickly judged;
s006: installing a thermostatic control device (2), closing a flow control valve (16) after the steps are finished, and supplementing the water quantity in the water storage barrel (11) through a water injection port (12); a power switch of the constant temperature control device (2) is turned on, when the water temperature in the water storage barrel (11) is heated to the control temperature of the temperature control switch (22), a temperature sensor (62) of the temperature measuring device (6) is placed into the measuring tubes (3) on the two sides of the impervious wall along with a nylon rope (64) with a plumb bob (63); then opening the flow control valve (16), simultaneously opening a switch of a multichannel temperature instrument (61) in the temperature measuring device (6) on the left side of the impervious wall, and when the temperature difference value of water measured by each temperature sensor (62) in the temperature measuring tube (3) on the left side of the impervious wall is not more than 5 ℃, opening the switch of the multichannel temperature instrument (61) in the temperature measuring device (6) on the right side of the impervious wall to start monitoring the change of the water temperature in the temperature measuring tube (3); when the water temperature measured by a certain temperature sensor (62) in the measuring tube (3) on the right side of the impervious wall is higher than the temperature measured by other sensors by more than 10 ℃, the impervious wall is considered to have obvious seepage-proofing hidden danger, the position of the impervious wall with the seepage-proofing hidden danger is calculated according to the position of the temperature sensor (62), and the position is mutually verified with the position of the seepage-proofing hidden danger obtained by analyzing the water level-time change curve of the measuring tube (3).
6. The inspection method using the nondestructive inspection apparatus for the cut-off wall of a dam as set forth in claim 5, wherein: in step S005, the operation principle is: when the impervious wall has no seepage-proofing hidden danger, the simulated water level of the fixed river/reservoir is larger than the actual reservoir water level, the water level of the measuring tube (3) behind the impervious wall can gradually rise under the action of water head pressure, and when the seepage field is stable, the water level of the measuring tube (3) behind the impervious wall can be kept unchanged; if the seepage-proofing hidden danger exists in the seepage-proofing wall, because the permeability coefficient of the seepage-proofing wall is suddenly increased, the rising speed of the water level of the measuring pipe (3) behind the seepage-proofing wall and the water level value when the water level value is finally stable are both larger than the former condition, the water level-time change curves of the measuring pipe (3) behind the seepage-proofing wall under different reservoir water level simulation working conditions can be contrasted and analyzed, and the approximate position of the seepage-proofing wall where the seepage-proofing hidden danger exists is judged; and further, when the water level of the measuring pipe (3) behind the impervious wall is kept stable, the permeability coefficients of the impervious wall above the original infiltration line at different vertical positions can be analyzed and calculated according to the formula (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210159467.5A CN114526870B (en) | 2022-02-22 | 2022-02-22 | Nondestructive detection device and detection method for dam cut-off wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210159467.5A CN114526870B (en) | 2022-02-22 | 2022-02-22 | Nondestructive detection device and detection method for dam cut-off wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114526870A CN114526870A (en) | 2022-05-24 |
| CN114526870B true CN114526870B (en) | 2023-04-07 |
Family
ID=81625704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210159467.5A Active CN114526870B (en) | 2022-02-22 | 2022-02-22 | Nondestructive detection device and detection method for dam cut-off wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114526870B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116642816B (en) * | 2023-06-15 | 2023-11-10 | 合肥工大共达工程检测试验有限公司 | Automatic water injection test equipment for cement soil impervious wall |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018159566A (en) * | 2017-03-22 | 2018-10-11 | 未来工業株式会社 | Leakage water testing apparatus |
| CN213091078U (en) * | 2020-09-11 | 2021-04-30 | 浙江先博节能科技有限公司 | Non-on-site sewage permeation remote monitoring and alarming device |
| CN113295347A (en) * | 2021-06-03 | 2021-08-24 | 中建二局土木工程集团有限公司 | Municipal administration road water supply and drainage pipeline antiseep detection device |
| CN214426924U (en) * | 2021-03-29 | 2021-10-19 | 江西省水利科学院 | Detection apparatus for dyke seepage passage position |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002216254A (en) * | 2001-01-16 | 2002-08-02 | Hosoya Fireworks Co Ltd | Position indicating marker |
| JP2003074090A (en) * | 2001-06-18 | 2003-03-12 | Toa Harbor Works Co Ltd | Water leakage detecting method of deep water intake pipe |
| CN103308258A (en) * | 2013-04-24 | 2013-09-18 | 河海大学 | Method for detecting leakage passage position of dam by using cold source method |
| EP2989434A1 (en) * | 2013-06-04 | 2016-03-02 | Siemens Aktiengesellschaft | System for leakage and collapse detection of levees and method using the system |
| JP6244330B2 (en) * | 2015-05-28 | 2017-12-06 | Ｊｆｅスチール株式会社 | Water leakage measuring device and measuring method for impermeable wall structure |
| CN113820078B (en) * | 2021-05-13 | 2024-04-09 | 水利部交通运输部国家能源局南京水利科学研究院 | Method for detecting dam leakage by combining tracing method and dilution concentration method |
| CN113203527B (en) * | 2021-05-22 | 2021-12-24 | 崇金玲 | Method for detecting leakage point position of underground concrete continuous wall |
-
2022
- 2022-02-22 CN CN202210159467.5A patent/CN114526870B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018159566A (en) * | 2017-03-22 | 2018-10-11 | 未来工業株式会社 | Leakage water testing apparatus |
| CN213091078U (en) * | 2020-09-11 | 2021-04-30 | 浙江先博节能科技有限公司 | Non-on-site sewage permeation remote monitoring and alarming device |
| CN214426924U (en) * | 2021-03-29 | 2021-10-19 | 江西省水利科学院 | Detection apparatus for dyke seepage passage position |
| CN113295347A (en) * | 2021-06-03 | 2021-08-24 | 中建二局土木工程集团有限公司 | Municipal administration road water supply and drainage pipeline antiseep detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114526870A (en) | 2022-05-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108222082B (en) | Dynamic precipitation indoor model test method and device for foundation pit under condition of multiple aquifers | |
| CN109974924B (en) | Shield tail synchronous grouting slurry buoyancy measuring device and method | |
| CN101831924B (en) | Simulator for blocking groundwater seepage by underground structure | |
| CN205808881U (en) | Automatic on-spot dicyclo water permeability testing arrangement of water inflow control permeable pavement | |
| CN114526870B (en) | Nondestructive detection device and detection method for dam cut-off wall | |
| CN104900130B (en) | A kind of Foundation Pit Pouring demonstrator and its Foundation Pit Pouring experiment research | |
| CN103868569A (en) | Device and setting method for measuring underground water level of vacuum drainage prepressing sealing membrane | |
| CN103234884B (en) | Testing apparatus and method for vertical osmotic coefficient of streambed shallow-layer sediment | |
| WO2014139236A1 (en) | Instrument for measuring vector energy and mass of three-dimensional flow speed | |
| CN109853646A (en) | Indoor simulation test device and method for confined water precipitation of foundation pit | |
| CN206573448U (en) | Infiltration test of testing pits automatically controls tape deck | |
| CN110376115B (en) | Double-ring water seepage test device with two rings integrated and operation method thereof | |
| CN113125066A (en) | Device and method for testing floating force of single-ring duct piece | |
| CN104318843B (en) | Artesian well water injection test device | |
| CN209707171U (en) | A kind of depthkeeping Stratified Sampling device for deeper subsurface water monitoring | |
| CN109723025B (en) | Underground structure boundary seepage test device and using method thereof | |
| CN112195986A (en) | Offshore barrel type foundation simulation test model device and penetration test method | |
| CN206920294U (en) | A kind of permeation coefficient of permeable concrete determines device | |
| CN206656713U (en) | The Vertical Settlement magnet ring structure of deep rock mass or soil body sedimentation and deformation test device | |
| CN211504952U (en) | Test device for measuring buoyancy force borne by embedded pipeline | |
| CN109781964B (en) | In-situ intelligent determination method for expansion amount of high-speed railway foundation mudstone under overburden load | |
| CN111044347B (en) | Test device and method for measuring buoyancy force born by embedded pipeline | |
| CN212454346U (en) | Orifice closing device for grouting | |
| CN204759887U (en) | Foundation ditch suddenly gushes demonstration appearance | |
| CN108680483B (en) | Soil body in-situ permeability coefficient measuring device and testing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230322 Address after: 330029 no.1038, Beijing East Road, Nanchang City, Jiangxi Province Applicant after: Jiangxi Academy of Water Resources (Jiangxi Dam Safety Management Center, Jiangxi Water Resources Management Center) Applicant after: POWERCHINA BEIJING ENGINEERING Corp.,Ltd. Address before: 330029 no.1038, Beijing East Road, Nanchang City, Jiangxi Province Applicant before: Jiangxi Academy of water resources |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |