CN105780822B - The monitoring instrument equipment and its setting method that underwater delaminating deposition measures - Google Patents
The monitoring instrument equipment and its setting method that underwater delaminating deposition measures Download PDFInfo
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- CN105780822B CN105780822B CN201610142118.7A CN201610142118A CN105780822B CN 105780822 B CN105780822 B CN 105780822B CN 201610142118 A CN201610142118 A CN 201610142118A CN 105780822 B CN105780822 B CN 105780822B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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Abstract
The monitoring instrument equipment and its setting method that underwater delaminating deposition measures, rigid prover pipe flange in the bottom withstands on the uncompressed soil layer of foot of hole, top is characterized on rigid prover pipe being equipped with several groups delaminating deposition measuring mechanism with parallel way away from hell certain distance；Delaminating deposition measuring mechanism is made of displacement meter and displaced block；Displacement meter is fixed on rigid prover pipe；Displaced block is sleeved on rigid prover pipe；Each displaced block is embedded in tegillum soil layer；Connection component is equipped between displacement meter and displaced block；Displacement bar is inserted into displacement meter cavity；Displacement bar is threadably secured on the center screw of connection component；Connection component screws in displaced block screw hole, is fixed in displaced block；The signal cable of displacement meter is guided to along rigid prover pipe on ground.The apparatus and method for of measurement underwater delaminating deposition proposed by the invention facilitates installation, measures simply, and can realize automatic measurement.
Description
Technical field
The invention belongs to the fields such as geotechnical engineering and hydraulic engineering monitoring, and in particular to a kind of measurement underwater layering is heavy
The measuring apparatus of drop, it can also be used to monitor coating delaminating deposition.The invention further relates to the setting sides of this monitoring instrument equipment
Method.
Background technology
As Chinese society rapid economic development and reform and opening-up deepen continuously, development day crescent is arranged in national basis
Different, underwater water transport, water conservancy and the Port structure such as breakwater, embankment, separation levee and shield beach dykes and dams are on the increase, and above-mentioned many is built
It builds object the modes such as jackstone or large-scale filling bag is respectively adopted and built, building basis is respectively positioned under water, and underwater base
The moisture content height of plinth, bad hydraulic permeability, compressibility is big, intensity is low, will produce larger sedimentation and sedimentation under building load effect
Difference, foundation bearing capacity and stability cannot be satisfied requirement of engineering, and above-mentioned building and operation overall process are needed to its ground
Base basic internal different parts settle, and are analyzed measurement data to take counter-measure, it is ensured that engineering safety.
It is built in supratectal dam at home in recent years gradually to increase, coating is wanted after treatment when building dam
It measures its sedimentation, and analyzing processing is carried out to measurement data to ensure the deforming of dam lower caldding layer, stablize and Seepage Safety.
The measurement method of traditional ground delaminating deposition is piece sedimentation pipe of Embedded installation, on the ground of delaminating deposition to be measured
Side is put into sedimentation pipe using delaminating deposition readout instrument in the closed common magnet ring of sedimentation pipe housing to monitor soil body delaminating deposition
Size.At present using delaminating deposition readout instrument measure soil body delaminating deposition generally use be all by delaminating deposition readout instrument,
Sedimentation pipe, magnet ring（Also referred to as magnetic rings）With locating ring composition, the outer diameter of locating ring is bigger than the internal diameter of magnet ring, and magnet ring
Internal diameter is bigger than the outer diameter of sedimentation pipe, to ensure that magnet ring can freely be moved along sedimentation pipe.Delaminating deposition needs when measuring
The cable that delaminating deposition readout instrument is manually slowly up drawn from sedimentation bottom of the tube moves the local delaminating deposition reading of installation magnet ring to
Instrument sends out tweeting sound, can after check on delaminating deposition readout instrument cable ruler scale to calculate soil body delaminating deposition size.It is this
Delaminating deposition measurement method measurement has to the artificial pulling up and down in sedimentation pipe always of a delaminating deposition readout instrument, not only takes
When it is laborious, artificial error in reading is also big, and can not realize automatic measurement.
For the foundation of the underwater water transports such as breakwater, embankment, separation levee and shield beach dykes and dams, water conservancy and Port structure
Delaminating deposition measures, and engineering is attempted to measure using the measurement method of traditional ground delaminating deposition, respectively in building
Drilling installs or installs delaminating deposition pipe and sedimentation ring using cast in place pile after water outlet, then is measured with laminated settlement meter, but
The former will be unable to be monitored levee body construction loading settlement of foundation early period in above two method, first the latter interferes construction
Greatly, and protection of instrumentation is extremely difficult, therefore rare energy accurate response is built so far for the ground delaminating deposition of submerged structure
Each layer compression in object load loading overall process underwater basis deforms achievement.Especially construction and run phrase is always positioned under water
Building, have no the monitoring instrument equipment that can be used for underwater basis compressed in layers deformation monitoring at present and its be applied to
Fruit.
Past is generally monitored dam foundation coating settlement monitoring using hydraulic pressure settlement gauge, but the instrument is pacified using drilling
It fills relatively difficult, the total settlement of monitoring coating is only used for using the monitoring dam foundation coating sedimentation of hydraulic pressure settlement gauge, but hydraulic pressure is heavy
Drop meter by leading to the pipe-line system behind dam due to transmitting fluid pressure, often since pipeline problem causes fluid pressure to transmit
Undesirable influence measurement accuracy is to influence the reliability of monitoring result.Develop with dam technology is built on coating, there is an urgent need to
Dam foundation coating total settlement and delaminating deposition are monitored to ensure that dam and its underlying security, dam engineering are built on coating
Sedimentation pipe is installed and is passed through with the piecewise spreading sedimentation pipe of dam filing if attempting to use with scientific research personnel to drill from dam foundation coating
The delaminating deposition measurement method that dam body leads to dam surface is monitored dam foundation coating delaminating deposition, this method remove exist with
Outside above-mentioned " measurement method of traditional deep soft soil foundation delaminating deposition " equally problem, sedimentation pipe draws with dam embankment spreading
It is not only big to dam filing construction interference to dam body surface, and protect difficult, it is easy to cause to settle tube damage, to make it adopt
The measurement method of delaminating deposition falls flat；Dam deep alluvion foundation deep soil settlement survey achievement is substantially at present
Space state is analyzed dam foundation coating total settlement and delaminating deposition according to field data to assess dam and its deep cover
Cap rock dam foundation safety and the working characteristics of the research deep covering layer dam foundation also can not just be implemented, and there is an urgent need to develop can be used for
The instrument and equipment of dam deep covering layer ground deep soil settlement survey.
Invention content
Technical problems to be solved needed for the present invention are to overcome existing technological deficiency；A kind of measurement underwater point is provided
The equipment and its setting method of layer sedimentation, also can measure dam foundation coating delaminating deposition.The key problem in technology solved is needed to be：Change
Into with fill up existing delaminating deposition readout instrument measuring technique defect, a kind of novel measurement underwater delaminating deposition is provided
Equipment and complete set technology, instrument and equipment do not need outside Embedded installation to the soil body to be measured, and are not required to manually delaminating deposition be drawn to read
Number instrument cables, directly with sensor signal receive the data cable that readout instrument measurement is guided to outside the soil body be achieved with underwater or
Coating delaminating deposition.
Completing the technical solution of foregoing invention task is, a kind of equipment measuring underwater delaminating deposition, by being embedded in
Rigid prover pipe in drilling is constituted, which withstands on the uncompressed soil of foot of hole（Rock）Layer, top
Away from hell certain distance（The distance is advisable with being approximately more than total compression deformation of the ground under upper load effect）, feature exists
In equipped with several groups on the rigidity prover pipe（It is right）Delaminating deposition measuring mechanism, each group（It is right）Delaminating deposition measuring mechanism with
Parallel way is mounted on the rigid prover pipe；Each group（It is right）Delaminating deposition measuring mechanism is respectively by displacement meter（It is also referred to as " big
Range displacement sensor "）It is formed with displaced block；Displacement meter therein（Great-scale displacement sensor）It is separately fixed at the rigidity
On prover pipe；Displaced block therein is set on the rigid prover pipe（It can be moved up and down along rigid prover pipe）；Institute
State each displaced block insertion tegillum soil layer；The group of the displacement meter and displaced block is to mode：It is equipped between displacement meter and displaced block
Connection component（Also referred to as " connector "）；Displacement bar is inserted into displacement meter cavity；The displacement bar is threadably secured in the company
On the center screw of connected components；The connection component screws in displaced block screw hole, is fixed in displaced block；The signal of displacement meter
Cable is guided to along the rigid prover pipe on ground.
More optimized and more specifically, structure of the invention is as follows：
Displacement meter（Great-scale displacement sensor）Fixed form with the rigid prover pipe is：Fixed position limiting clamp and support
The upper and lower part of displacement meter is fixed on baseline rod by guide clip respectively.
Displaced block insertion tegillum soil layer mode be：Upper elastic expanding card is respectively fixed in displaced block.Before installation, use
It tightens chain the elastic expanding card is tightened and fixed；Underwater delaminating deposition measuring apparatus is after installation is complete in drilling, release tightening
Displaced block is embedded in tegillum soil layer, combined closely with the soil body by chain, elastic expanding card spreading.Displacement is driven when the soil body settles
Block moves.
The fixed point of the displaced block is fixed with tightening chain and positioning chain；The positioning chain link is in rigid prover pipe
Suitable position.The device can ensure to tighten chain and position chain to be pressed from both sides and positioned by guide and limit after the completion of displacement block assembly assembles
The constraint up and down of chain.
Each group（It is right）In delaminating deposition measuring mechanism, it is also provided with the displacement bar protection cylinder of displacement sensor.The protection
Jacket casing is outside displacement meter, and displacement meter protection cylinder is threadably secured on connection component, and it is right that the component displaced block is passed through
Mesoporous is sleeved on rigid prover pipe.
An angle is changed repeatedly to say, the scheme of the invention is：A kind of equipment measuring underwater delaminating deposition, by burying
Rigid prover pipe in the borehole, great-scale displacement sensor, displacement sensor displacement bar, displacement sensor fix position limiting clamp,
Displacement sensor support guide position limiting clamp, displacement sensor displacement bar protection cylinder, displaced block, displacement meter couple with displaced block
Part is constituted；In tested ground point position using the uncompressed soil outside drill hole of drilling machine to upper load influence depth range（Rock）
Layer, the underwater delaminating deposition measuring apparatus being equipped with is sunk in drilling, wherein rigid prover pipe flange in the bottom withstands on brill
The uncompressed soil in hole bottom（Rock）Layer, top is away from hell certain distance（The distance is acted on being approximately more than ground in upper load
Under total compression deformation be advisable）, great-scale displacement meter is connected in it with parallel way in underwater delaminating deposition measuring apparatus
On rigid prover pipe, when each soil layer of ground settles, it will drive and the shifting of the displaced block in the soil layer is connected in by elastic expanding card
It is dynamic, and displacement bar is pulled, it changes so as to cause great-scale displacement measured value, can be surveyed by calculating the variation of displacement measured value
Obtain the delaminating deposition value of each soil layer of ground.
Completing the technical solution of second invention task of the application is：The equipment of above-mentioned measurement underwater delaminating deposition
Setting method, which is characterized in that steps are as follows：
(1) estimates settling amount size according to tegillum soil layer, selects the displacement meter of reasonable range；
(2) its tightening Kong Houyong nuts tightening is penetrated using tightening screw rod when is assembled, displacement meter is firmly secured to benchmark
On bar, the piecewise controlled rolling of displacement meter signal cable is on rigid prover pipe；By displacement meter fixation；
(3) displacement meter and the connection component of displaced block are screwed in displaced block screw hole and are fixed in displaced block by；
(4) displacement bars are threadably secured on the center screw of connection component；
(5) displacement meter protection cylinder is threadably secured on connection component by；
(6) the displaced block for completing said modules assembly is sleeved on by centring hole on rigid prover pipe by；
(7) simultaneous displacements bar is inserted into displacement meter cavity；Protect jacket casing outside displacement meter；
By prover pipe the forced centering in the full depth bounds of drilling.
(9) determines that instrument embedding installs point according to design measurement and positioning；
(10) is set using drilling machine completion instrument mounting hole position；
Repeat example 1 step (1)-(3), whole displacement meters and its mounting assembly are completed in assembly, often cover displacement meter and its
The prover pipe top of mounting assembly is threadably secured interconnection of the prover pipe jointing for each component；
(12) bottommosts mounting assembly lower part is threadably secured pivot flange 1, as needed in each displacement meter and its
Between mounting assembly 3 with prover pipe jointing be threadably secured connection different length rigid prover pipe 2 with adjusting everybody
It moves the accurate installation of meter to its design and is tested soil layer；
Use piecewise lifting mode, segmentation or full section that instrument and equipment and its component are installed in monitoring holes, with letter
Whether number receiving readout instrument and detect each displacement meter normally；An auxiliary steel wire rope is fixed to prevent in lifting overall process baseline rod bottom
Installation process can pull out instrument and equipment in drilling when accident occurs, and instrument and equipment relaxes the auxiliary steel wire after installation is complete
It is put into drilling；
After the installation of inspection apparatus equipment is accurate, sequentially discharge one by one in each displaced block elastic expanding card tightening chain and
Chain is positioned, so that each displaced block is securely embedded in tegillum soil layer, while discharging positioning chain, so that displaced block is freely moved downward, respectively
Displaced block first discharges tightening chain and discharges positioning chain again, then whether receive readout instrument with signal and detect each displacement meter normally；
After confirming that each displacement meter is normal, sealing of hole is backfilled, instrument signal cable leads to construction now using protection protection of pipe
Safety zone other than, installation is complete for instrument.
In more detail, underwater delaminating deposition measuring apparatus of the invention, feature, structure and function are as follows：
1）Installation boring aperture is 110~150mm；
2）Rigid prover pipe is that diameter is not less than 30mm, and wall thickness is more than the big rigidity steel pipe of 6mm（Or stainless steel tube）, to protect
The rigid prover pipe of card has good stiffness, and rigid prover pipe often saves 1~3m long, and is processed into internal thread at every section pipe both ends, often
The through-hole that internal thread 10cm is respectively provided with diameter 10mm is left at section pipe both ends, first is used to insert extension bar to fasten benchmark pipe screw thread,
The extension bar can be used as when measuring apparatus installation is lowered into hole as hoisting structure simultaneously；
3）Prover pipe jointing is identical as prover pipe outer diameter, and both ends are processed into match with prover pipe internal thread
External screw thread, the through-hole of diameter 10mm is set in the middle part of connector, the through-hole function is identical as through-hole function on prover pipe；
4）Great-scale displacement sensor uses LVDT wide range inductance displacement meters, which is that range is big, reachable
1000mm, precision is high, and sensor accuracy index is 0.1%F.S, and displacement bar is mutual indepedent with instrument element, and displacement bar activity is certainly
Such as, the displacement sensor diameter for encapsulating completion is small, and is not influenced by range size；
5）Displacement sensor displacement bar is the stainless steel of diameter 6mm, and lower part setting connection screw thread is fixed with connection component
Connection；
6）It is assembled metal formula component that displacement sensor, which fixes position limiting clamp and displacement sensor support guide folder, convenient for existing
Field quick assembling, uses metal material to ensure that it fixes and supports intensity；
7）The displacement bar protection cylinder of displacement sensor is that high toughness plastic protects cylinder, internal diameter and displacement sensor outer diameter
Match, protection cylinder lower part carries out rigid attachment using helicitic texture and displacement component；
8）Displaced block is the nylon block of thickness 60mm, and flat shape is generally circle, the setting of displaced block in-plane position
With the matched hole of benchmark pipe outside diameter to ensure displaced block along prover pipe free movement, displaced block periphery is fixed with elastic expanding card and determines
Position chain, elastic expanding card total length are more than 60cm, and installation process is tightened by tightening chain makes its outer profile size be less than displaced block
Appearance profile, installation process positioning chain top are connected on prover pipe to ensure that measuring apparatus installation overall process displaced block is accurately fixed
Positioned at tested soil layer, entire measuring apparatus full set peace load hole is released by the peculiar release device that this equipment is arranged first afterwards in place
Putting elastic expanding card makes it securely after embedded tested soil layer, then discharging positioning chain allows displaced block when solum settlement occurs along base
Quasi- pipe is moved freely accurately to be measured to the delaminating deposition for being tested soil layer；
9）All displacement transducer signal cables of underwater delaminating deposition measuring apparatus lead to going out at the top of measuring apparatus
Accumulated before line device a single data cable by go out line device and using protection protection of pipe lead to other than construction site safety zone with
External electric signal receives readout instrument connection and measures.
In other words, the scheme of the invention is：The equipment body for measuring underwater delaminating deposition is to be embedded in underwater
The great-scale displacement sensor and displaced block of different depth position in peephole, displaced block pass through the elastic expanding card in the embedded soil body
It combines closely with the soil body, drives displaced block to move when the soil body settles, displaced block drives displacement sensor when moving
Displacement bar movement will make displacement sensor inductance change, and the inductance protection by measuring displacement meter can measure tested soil layer
Change in displacement.The novel measurement technique of the present invention only needs Embedded installation to underwater surface in Embedded installation, and measurement is set
Standby all displacement transducer signal cables, which lead to going out before line device at the top of measuring apparatus and accumulate a single data cable, passes through outlet
Device simultaneously leads to safety zone and external electric signal reception readout instrument other than construction site using protection protection of pipe and connect and measure,
It may be implemented to measure the purpose of underwater delaminating deposition automatically.
The apparatus and method for of measurement underwater delaminating deposition proposed by the invention facilitates installation, measures simply, and can
Realize automatic measurement.
Description of the drawings
Fig. 1 is the device structure schematic diagram that the present invention measures underwater delaminating deposition；
Fig. 2 is the displacement meter assembly structure figure of underwater delaminating deposition measuring apparatus of the present invention；
Fig. 3 is the displaced block design structure diagram of underwater delaminating deposition measuring apparatus of the present invention；
Fig. 4 is that the displacement sensor of underwater delaminating deposition measuring apparatus of the present invention fixes position limiting clamp and support guide limit
Position folder design structure diagram.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with attached drawing and specific implementation
Case is described in further detail the method for the present invention.Specific implementation case described herein only to explain the present invention, and
It is not used in the restriction present invention.
Embodiment 1, the assembling assembly of the single displacement meter component of underwater delaminating deposition measuring apparatus.
(1) estimates settling amount size according to tegillum soil layer, selects the displacement meter of reasonable range.
(2) is as shown in Fig. 2, the displacement for (1) being selected step using position limiting clamp 13 and support guide folder 11 is fixed shown in Fig. 4
Baseline rod 5 is fixed in the upper and lower part of meter 12, and fast and convenient, fixed position limiting clamp 13 and support guide limit are assembled for Assembling
The structure design of position folder 11 is the assembled component of 3 valves, is penetrated after it tightens hole 19 using tightening screw rod when assembly and is received with nut
Tightly displacement meter 12 is firmly secured on baseline rod 5, displacement meter signal cable 14 is using the piecewise controlled rolling of suitable method in rigid base
On quasi- pipe.Geometrical clamp 13 and guide clip 11 are all made of metal material and are process to ensure its enough intensity, 13 He of geometrical clamp
21 size of hole designed in guide clip 11 and baseline rod outer diameter tight fit, hole 22 and displacement meter outer diameter tight fit, above-mentioned two are tight
Matching hole can guarantee that displacement meter fixation, geometrical clamp 13 and guide clip 11 are designed with only head spiral shell simultaneously after tightening screw rod tightening
Hole 20 passes through baseline rod and by screw thread further by displacement meter fixation using stopping screw；Geometrical clamp 13 and guide clip
11 are designed as 3 valve combined type components, are adjusted convenient for assembled in situ and position, and also allowing for adjusting displacement meter makes itself and baseline rod keep
It is parallel, improve ground delaminating deposition measurement accuracy.
(3) displacement meter and the connection component of displaced block 8 are screwed in displaced block screw hole 17 and are fixed in displaced block 7 by
On；
(4) displacement bars 9 are threadably secured on the center screw of connection component 8；
(5) displacement meter protection cylinder 10 is threadably secured on connection component by；
(6) the displaced block for completing said modules assembly is sleeved on by centring hole 16 on rigid prover pipe 5 by；
(7) simultaneous displacements bar 9 is inserted into displacement meter cavity, and protection cylinder 10 is sleeved on outside displacement meter, in the elastic expanding of displaced block 7
Upper elastic expanding card 6 is fixed at card installation point 15 respectively, is fixed at positioning chain fixed point 18 and positions chain, protected on moving displacement block 7
Main guide clip 11 is pushed up on 10 top of casing, is tightened elastic expanding card 6 using tightening chain, and positioning chain link is in the suitable position of rigid prover pipe
It sets, tightens chain and positioning chain is tightened and fixed using special device and structure, which can ensure to tighten chain and determine
Position chain is led after the completion of delaminating deposition measuring apparatus facilitates in drilling after installation is complete release, displacement block assembly to assemble under water
Constraint up and down to position limiting clamp and positioning chain, position can be accurately positioned, and ensure that the underwater delaminating deposition measurement of the present invention is set
The displacement meter of each layered soil sedimentation of standby measurement is accurately positioned at tested soil layer.
(8) displaced blocks are as shown in figure 3, its flat shape is generally circle, wherein two symmetrical outer profiles are arc-shaped with reality
Existing forced centering function, perpendicular outer profile designed arc-shaped appearance milling are plane as displacement meter signal cable channel, displacement
Block in-plane position is arranged with the matched hole of benchmark pipe outside diameter 16 to ensure displaced block along prover pipe free movement, the displaced block
The style characteristic of design and its Position Design of centring hole 16 can ensure the underwater delaminating deposition measuring apparatus of the present invention
The forced centering along the full depth bounds of edge drilling in installation drills, to improve measurement accuracy, displaced block periphery design is symmetrical
Elastic expanding fixes fixed point 15, and symmetrical structure is also conducive to prover pipe forced centering in drilling.
Embodiment 2, underwater delaminating deposition measuring apparatus Embedment and installation.Steps are as follows：
(9) determines that instrument embedding installs point according to design measurement and positioning；
(10) is set using drilling machine completion instrument mounting hole position；
Repeat example 1 step (1)-(3), whole displacement meters and its mounting assembly are completed in assembly, often cover displacement meter and its
The prover pipe top of mounting assembly is threadably secured interconnection of the prover pipe jointing 4 for each component；
(12) bottommosts mounting assembly lower part is threadably secured pivot flange 1, as needed in each displacement meter and its
Between mounting assembly 3 with prover pipe jointing 4 be threadably secured connection different length rigid prover pipe 2 with adjusting everybody
It moves the accurate installation of meter to its design and is tested soil layer；
Use piecewise lifting mode, segmentation or full section that instrument and equipment and its component are installed in monitoring holes, with letter
Whether number receiving readout instrument and detect each displacement meter normally；An auxiliary steel wire rope is fixed to prevent in lifting overall process baseline rod bottom
Installation process can pull out instrument and equipment in drilling when accident occurs, and instrument and equipment relaxes the auxiliary steel wire after installation is complete
It is put into drilling；
After the installation of inspection apparatus equipment is accurate, sequentially discharge one by one in each displaced block elastic expanding card tightening chain and
Chain is positioned, so that each displaced block is securely embedded in tegillum soil layer, while discharging positioning chain, so that displaced block is freely moved downward, respectively
Displaced block first discharges tightening chain and discharges positioning chain again, then whether receive readout instrument with signal and detect each displacement meter normally；
After confirming that each displacement meter is normal, sealing of hole is backfilled, instrument signal cable leads to construction now using protection protection of pipe
Safety zone other than, installation is complete for instrument.
Claims (8)
1. a kind of equipment measuring underwater delaminating deposition, is made of, the rigidity base the rigid prover pipe for burying in the borehole
Quasi- bottom of the tube flange withstands on the uncompressed soil layer of foot of hole, and top is away from hell certain distance, which is characterized in that in the rigidity
Prover pipe is equipped with several groups delaminating deposition measuring mechanism, and each group is layered settlement measurement mechanism with parallel way mounted on described rigid
On property prover pipe；Each group layering settlement measurement mechanism is made of displacement meter and displaced block respectively；Displacement meter therein is fixed respectively
On the rigid prover pipe；Displaced block therein is set on the rigid prover pipe；Each displaced block is embedded in quilt
Survey soil layer；The group of the displacement meter and displaced block is to mode：Connection component is equipped between displacement meter and displaced block；Displacement bar is inserted
Enter in displacement meter cavity；The displacement bar is threadably secured on the center screw of the connection component；The connection component rotation
Enter in displaced block screw hole, is fixed in displaced block；The signal cable of displacement meter is guided to along the rigid prover pipe on ground；
The fixed form of the displacement meter and the rigid prover pipe is：Fixed position limiting clamp and support guide folder are respectively by displacement meter
Upper and lower part be fixed on baseline rod.
2. the equipment according to claim 1 for measuring underwater delaminating deposition, which is characterized in that the displaced block insertion
Being tested the mode of soil layer is：Elastic expanding card is respectively fixed in displaced block；Before installation, the elastic expanding card is received using tightening chain
It is tight and fixed；Underwater delaminating deposition measuring apparatus is after installation is complete in drilling, release tightening chain, elastic expanding card spreading, by position
It moves block and is embedded in tegillum soil layer, combine closely with the soil body.
3. the equipment according to claim 1 for measuring underwater delaminating deposition, which is characterized in that the displaced block is consolidated
At fixed point, it is fixed with tightening chain and positioning chain；The positioning chain link is on rigid prover pipe.
4. the equipment of the measurement underwater delaminating deposition according to one of claim 1-3, which is characterized in that each group
The displacement bar equipped with displacement sensor protects cylinder in delaminating deposition measuring mechanism；The protection jacket casing is outside displacement meter, the displacement meter
Protection cylinder is threadably secured on connection component, and component displaced block is sleeved on by centring hole on rigid prover pipe.
5. the equipment according to claim 4 for measuring underwater delaminating deposition, which is characterized in that the boring aperture is
110~150mm；
The diameter of the rigidity prover pipe is not less than 30mm, and wall thickness is more than 6mm；The rigidity prover pipe often saves 1~3m long, and every
Internal thread is processed at section pipe both ends, is often saved pipe both ends and is left the through-hole that internal thread 10cm is respectively provided with diameter 10mm；
The rigidity prover pipe jointing is identical as prover pipe outer diameter, and both ends are processed into and prover pipe internal thread phase
The external screw thread matched, connector middle part set the through-hole of diameter 10mm, and the through-hole function is identical as through-hole function on prover pipe.
6. the equipment according to claim 5 for measuring underwater delaminating deposition, which is characterized in that displacement meter uses LVDT
Wide range inductance displacement meter；Sensor accuracy index is 0.1%F.S；
Institute's displacement sensors displacement bar is the stainless steel of diameter 6mm, and lower part is arranged connection screw thread and fixes company with connection component
It connects；
It is assembled metal formula component that institute's displacement sensors, which fix position limiting clamp and displacement sensor support guide folder,；
The displacement bar protection cylinder of institute's displacement sensors is that high toughness plastic protects cylinder, internal diameter and displacement sensor outer diameter
Match, protection cylinder lower part carries out rigid attachment using helicitic texture and connection component.
7. the equipment according to claim 6 for measuring underwater delaminating deposition, which is characterized in that the displaced block is thickness
The nylon block of 60mm is spent, flat shape is circle, the setting of displaced block in-plane position and the matched Kong Yibao of benchmark pipe outside diameter
Displaced block is demonstrate,proved along prover pipe free movement, displaced block periphery is fixed with elastic expanding card and positioning chain, and elastic expanding card total length is more than
60cm。
8. the equipment setting method described in claim 1 for measuring underwater delaminating deposition, which is characterized in that steps are as follows：
(1) estimates settling amount size according to tested soil layer, selects the displacement meter of reasonable range；
(2) penetrate its tightening Kong Houyong nuts tightening using tightening screw rod when is assembled displacement meter is firmly secured on baseline rod,
The piecewise controlled rolling of displacement meter signal cable is on rigid prover pipe；By displacement meter fixation；
(3) displacement meter and the connection component of displaced block are screwed in displaced block screw hole and are fixed in displaced block by；
(4) displacement bars are threadably secured on the center screw of connection component；
(5) displacement meter protection cylinder is threadably secured on connection component by；
(6) the displaced block for completing said modules assembly is sleeved on by centring hole on rigid prover pipe by；
(7) simultaneous displacements bar is inserted into displacement meter cavity；Protect jacket casing outside displacement meter；
By prover pipe the forced centering in the full depth bounds of drilling；
(9) determines that instrument embedding installs point according to design measurement and positioning；
(10) is set using drilling machine completion instrument mounting hole position；
Repeat step (1)-(3), whole displacement meters and its mounting assembly are completed in assembly, often cover displacement meter and its mounting assembly
Rigid prover pipe top is threadably secured interconnection of the prover pipe jointing for each component；
(12) bottommosts mounting assembly lower part is threadably secured pivot flange, as needed in each displacement meter and its installation group
The rigid prover pipe for being threadably secured connection different length between part with prover pipe jointing is accurate to adjust each displacement meter
Installation to its design is tested soil layer；
It uses piecewise lifting mode, segmentation or full section that instrument and equipment and its component are installed in monitoring holes, is connect with signal
Whether receiving each displacement meter of readout instrument detection normally；An auxiliary steel wire rope is fixed to prevent from installing in lifting overall process baseline rod bottom
Process can pull out instrument and equipment in drilling when accident occurs, and auxiliary steel wire relaxation is put into after installation is complete by instrument and equipment
In drilling；
After the installation of inspection apparatus equipment is accurate, elastic expanding card tightening chain and positioning in each displaced block are sequentially discharged one by one
Chain makes each displaced block securely embedded tested soil layer, while discharging positioning chain, so that displaced block is freely moved downward, each displacement
Block first discharges tightening chain and discharges positioning chain again, then whether receive readout instrument with signal and detect each displacement meter normally；
After confirming that each displacement meter is normal, backfill sealing of hole, instrument signal cable use protect protection of pipe lead to construction site with
Outer safety zone, installation is complete for instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610142118.7A CN105780822B (en) | 2016-03-11 | 2016-03-11 | The monitoring instrument equipment and its setting method that underwater delaminating deposition measures |
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| CN109577389A (en) * | 2019-01-04 | 2019-04-05 | 中国水利水电科学研究院 | A kind of prestress anchorage cable intelligent monitoring device and its installation method |
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| CN109931108B (en) * | 2019-04-02 | 2020-11-24 | 中国十七冶集团有限公司 | Monitoring and early warning method for settlement of soil body in composite stratum in pipe jacking construction and observation rod |
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| CN114279400A (en) * | 2021-12-20 | 2022-04-05 | 水利部交通运输部国家能源局南京水利科学研究院 | Automatic monitoring device and method for internal settlement and foundation deformation of damming dam |
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| JPH0769195B2 (en) * | 1989-11-10 | 1995-07-26 | 機動建設工業株式会社 | Ground fluctuation measuring device |
| CN103851984A (en) * | 2014-03-27 | 2014-06-11 | 水利部交通运输部国家能源局南京水利科学研究院 | Multipoint displacement meter capable of artificial measurement, electric measurement or remote measurement and mounting and application method |
| CN103953025B (en) * | 2014-05-13 | 2015-10-28 | 水利部交通运输部国家能源局南京水利科学研究院 | Measure equipment and the method to set up thereof of Deep Thick Soft Ground or covering layer delaminating deposition |
| CN104452726B (en) * | 2014-12-04 | 2016-03-09 | 浙江广川工程咨询有限公司 | Profundal zone soil body deep soil settlement survey device and method |
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