CN110275009A - Dike piping simulation test device and test method under a kind of high water level - Google Patents
Dike piping simulation test device and test method under a kind of high water level Download PDFInfo
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- CN110275009A CN110275009A CN201910682577.8A CN201910682577A CN110275009A CN 110275009 A CN110275009 A CN 110275009A CN 201910682577 A CN201910682577 A CN 201910682577A CN 110275009 A CN110275009 A CN 110275009A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 149
- 238000012360 testing method Methods 0.000 title claims abstract description 64
- 238000004088 simulation Methods 0.000 title claims abstract description 30
- 238000010998 test method Methods 0.000 title claims abstract description 10
- 239000004576 sand Substances 0.000 claims abstract description 66
- 239000002689 soil Substances 0.000 claims abstract description 65
- 239000011521 glass Substances 0.000 claims abstract description 19
- 238000005192 partition Methods 0.000 claims abstract description 15
- 239000011325 microbead Substances 0.000 claims abstract description 14
- 239000011148 porous material Substances 0.000 claims abstract description 13
- 239000000700 radioactive tracer Substances 0.000 claims abstract description 3
- 238000012783 upstream development Methods 0.000 claims abstract description 3
- 230000008859 change Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 239000004927 clay Substances 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 238000002955 isolation Methods 0.000 claims description 8
- 239000010410 layer Substances 0.000 claims description 8
- 238000011161 development Methods 0.000 claims description 6
- 239000005315 stained glass Substances 0.000 claims description 6
- 239000002344 surface layer Substances 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 239000012780 transparent material Substances 0.000 claims description 3
- 238000000280 densification Methods 0.000 claims description 2
- 239000003086 colorant Substances 0.000 claims 1
- 230000008569 process Effects 0.000 description 5
- 230000002123 temporal effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003204 osmotic effect Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000009666 routine test Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- 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
- G01N15/082—Investigating permeability by forcing a fluid through a sample
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses dike piping simulation test device and test method under a kind of high water level, chamber is divided into reservoir chamber by permeable partition and soil sample fills room；Valve ball is equipped with inside equalizing tank, and valve ball is height-adjustable；The water inlet of reservoir chamber is connected to the water outlet of equalizing tank by pipeline, is supplied water by equalizing tank and is adjusted hydraulic pressure, and the height of equalizing tank is adjustable；The open and close of water pump are controlled by the valve ball in equalizing tank, and equalizing tank is matched with valve ball for accurately controlling reservoir chamber height of water level；Soil sample, which is filled room bottom and filled out, is covered with sand-gravel cushion, setting test sandy soils above sand-gravel cushion；Pore water pressure sensor is buried in test sandy soils, is laid with colorful glass microbead in the axial direction at the top of test sandy soils, is used for tracer piping upstream development track；It is drawn by the connection of water sand discharge line piping outlet；Water beach volleyball, which goes out below pipe outlet, to be provided with for collecting the funnel for gushing sand.
Description
Technical field
The invention belongs to hydraulic engineering technical fields, and in particular under a kind of high water level dike piping simulation test device and
Test method.
Background technique
Piping harm in dam seepage destruction is serious, development mechanism are as follows: since upstream head is higher, dykes and dams foundation sand
Soil layer permeates gradient and exceeds permissible value, and part sand is gushed out in downstream；As the generation of sand is gushed in outlet, basic seepage paths is shortened,
Increased basis sandy soils permeate gradient, so that being further exacerbated by outlet gushes sand, until dykes and dams destroy.Study dykes and dams foundation sand
Soil layer piping test is of great significance to preventing dike from being tube like leakage and emergency disposal, wherein determining the critical that sandy soils piping occurs
The correlativity of head and the development and change of piping length at any time is the most important factor of piping.
Routine test device is limited by size and observation, can only determine critical head, can not effectively observe that piping develops
It change procedure and gushes sand and changes with time rule etc..
Summary of the invention
Purpose: in order to overcome the deficiencies in the prior art, the present invention provides dike piping under a kind of high water level and simulates
Experimental rig and test method.
Technical solution: in order to solve the above technical problems, the technical solution adopted by the present invention are as follows:
Dike piping simulation test device under a kind of high water level, including water tank, water pump, equalizing tank and chamber, the examination
Tryoff is divided into reservoir chamber by permeable partition and soil sample fills room；
Described water pump one end is connected by pipeline with water tank, and the other end is connected in equalizing tank, in the equalizing tank
Portion is equipped with valve ball, and the valve ball is height-adjustable；The water inlet of the reservoir chamber and the water outlet of equalizing tank pass through pipe
Road connection, is supplied water by equalizing tank and adjusts hydraulic pressure, and the height of equalizing tank is adjustable；The open and close of the water pump by
The control of valve ball in equalizing tank, equalizing tank are matched with valve ball for accurately controlling the indoor head height of water storage；Mould
Quasi- head is subject to equalizing tank head.
The soil sample, which is filled room bottom and filled out, is covered with sand-gravel cushion, and middle part is test sandy soils, and surface layer is laid with clay covering
Layer；Pore water pressure sensor is buried in test sandy soils, is laid with stained glass in the axial direction at the top of test sandy soils
Microballon is used for tracer piping upstream development track；
The soil sample fills room and reservoir chamber side is being provided with piping outlet, and the piping outlet is connected by water sand discharge line
It is logical to draw；The water beach volleyball, which goes out below pipe outlet, to be provided with for collecting the funnel for gushing sand；Filtering is provided in the funnel
Device, the water filtered out are discharged by the drainage duct that funnel bottom is connected to.
Preferably, dike piping simulation test device under the high water level, the reservoir chamber is closed, and top
Offer gas vent.
Preferably, dike piping simulation test device under the high water level, the soil sample are filled room upper end and are opened
Mouthful, further, and it is equipped with cover board.
Preferably, the permeable position of the permeable partition and water permeable area are adjustable, for simulating different sizes
Piping section.
Preferably, 10 ~ 100 μm of the diameter of the colorful glass microbead, 2.4 ~ 2.6g/cm of specific gravity3, stained glass
The average-size and specific gravity of microballon are identical as gravel.
Preferably, dike piping simulation test device under the high water level, dike piping is simulated under high water level
During test, the displacement of colorful glass microbead can carry out Digital Image Processing calculating displacement by taking pictures.
Preferably, dike piping simulation test device under the high water level, of sand in the sandy soils
Grade is matched and initial aqueous rate is identical as the grain composition of original state sand and initial aqueous rate；
In the sandy soils, coarse sand isolation strip is filled in intermediate arrangement piping channel, two sides, guarantees that upstream straight line is sent out in piping channel
Exhibition.Piping develops channel and buries pore water pressure sensor, the variation of real-time automatic measuring sandy soils different location osmotic pressure along journey.
Preferably, the chamber and cover board use transparent material.Further, using transparent organic glass system
At.
On the other hand, the present invention also provides dike piping simulation experiment methods under a kind of high water level, comprising:
Indoor bottom is filled in soil sample and is laid with sand-gravel cushion, and middle layer is laid with test sandy soils, buries hole in test sandy soils
Gap water pressure sensor and coarse sand isolation strip are tested after sandy soils densification reality in its surface arranged for interval difference face in the axial direction
Then the colorful glass microbead of color is laid with clay blanket on surface layer；
The height of equalizing tank and valve ball is set, water pump is opened and is drawn water from water tank into equalizing tank, water flow passes through pipeline
Into reservoir chamber, keep the closing of permeable partition, opened when the water level in reservoir chamber rises to demand height permeable partition into
Row test；
Elemental height selects lesser head, and that tests that observation tube after water flowing gushes out mouth gushes sand amount, if being kept for one section of constant level
Time (10-15 minutes) does not occur gushing sand, then increases height of water level 10cm and continue to observe；If being gushed in a certain constant water level
Sand then keeps constant level and records head data, gushes after sand enters funnel by water sand discharge line and deposits, in sand
Water filter out after drainage duct discharge, gush sand amount by what each period was equaled a record in day, and pass through measuring cup note simultaneously
Record the water yield of each period；
Due to the sand discharge in test sandy soils, there is gushing a period of time after sand, test sandy soils will appear deformation, the deformation
It can change as sand grains be displaceds to the right, by the displacement of observation colorful glass microbead and to gush stained glass in sand micro-
Pearl appearance sequence can clearly observe that piping upstream develops the position of deformation, and by the digital picture for progress of taking pictures at
Reason records the development position of each period piping and develops rate.
The utility model has the advantages that dike piping simulation test device and test method under high water level provided by the invention, when piping is existing
When as occurring, the sand grains in original stabilizing talent are displaced, and it is critical that traditional piping experimental study is concentrated mainly on piping
The observation of overall deformation during head and piping, and rarely have and be related to occurring piping position distortions degree quantitative observation and combine to become
Shape gushes sand measurement, and the present invention creatively passes through dike piping simulation test device under design high-water, by using hole
Gap water pressure sensor observing earth intracorporal seepage field spatial and temporal distributions, and can intuitively observe and analytical soil sample external
Situation of change, simulation dike piping destroy overall process, for that can be that embankment safety operation, emergency prevention and decision under high water level mention
For technical support.
The present invention can destroy indoor model test for dike piping, broken by simulating dike piping under different water levels
It is bad, pore water pressure temporal and spatial evolution is analyzed, dykes and dams process of deformation and failure provides for Accurate Analysis dike piping deformation failure
Convenience.
The present invention has many advantages, such as that principle is simple, operates conveniently, monitor fast, can repeatedly utilize, to test serious forgiveness high.Tool
For body: 1) different scale test can be carried out, experimental rig can be used organic glass slot, and when large scale can also be used simple mixed
Solidifying soil box etc., size is unrestricted, avoids the undersized influence to experimental accuracy；
2) for inconvenient problem is observed, using the measures such as colorful glass microbead are adulterated in sand, piping development and change are effectively tracked
Journey；
3) pressure-measuring pipe uses pore water pressure sensor, is convenient for automatic observation；
4) upstream automatic water supplement apparatus, guaranteed water level balance；
5) downstream is gushed husky collection device water sand and is separated and collected, convenient for gushing husky amount and water yield real-time follow-up.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of dike piping simulation test device under high water level in embodiment；
In figure: water tank 1, water pump 2, valve ball 3, equalizing tank 4, gas vent 5, reservoir chamber 6, permeable partition 7, sand-gravel cushion 8,
Test sandy soils 9, clay blanket 10, coarse sand isolation strip 11, colorful glass microbead 12, pore water pressure sensor 13, piping
Export 14, water sand discharge line 15, funnel 16, balance 17.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Below
Description only actually at least one exemplary embodiment be it is illustrative, never as to the present invention and its application or make
Any restrictions.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments
It is not limited the scope of the invention up to formula and numerical value.Simultaneously, it should be appreciated that for ease of description, each portion shown in attached drawing
The size divided not is to draw according to actual proportionate relationship.For technology, side known to person of ordinary skill in the relevant
Method and equipment may be not discussed in detail, but in the appropriate case, and the technology, method and apparatus should be considered as authorizing explanation
A part of book.In shown here and discussion all examples, any occurrence should be construed as merely illustratively, and
Not by way of limitation.Therefore, the other examples of exemplary embodiment can further include different values.It should also be noted that similar mark
Number and letter similar terms are indicated in following attached drawing, therefore, once be defined in a certain Xiang Yi attached drawing, then subsequent
It does not need that it is further discussed in attached drawing.
Embodiment one
Dike piping simulation test device under a kind of high water level, which includes chamber, and the chamber passes through permeable partition 7
The soil sample for being divided into closed reservoir chamber 6 and upper end opening fills room, and the soil sample fills interior and filled certain thickness on demand
The test sandy soils 9 of degree, in some embodiments, as shown in Figure 1,9 bottom of test sandy soils is filled out and is covered with sand-gravel cushion
8, top is provided with clay blanket 10.It is micro- along spout axis different location laying stained glass inside the test sandy soils 9
Pearl 12 and pore water pressure sensor 13 and coarse sand isolation strip 11；The soil sample fills room and 6 side of reservoir chamber is being provided with pipe
Gush out mouth 14, the piping outlet 14 is drawn by the connection of water sand discharge line 15；Piping outlet 14 passes through water sand discharge line
15 connections are drawn, and the outlet of water sand discharge line 15 lower section is provided with for collecting the funnel for gushing sand for exporting from piping out
16；It is provided with filter device in the funnel 16, the water filtered out is discharged by the drainage duct of 16 bottom of funnel.
It further include water tank 1, water pump 2, described 2 one end of water pump is connected by pipeline with water tank 1, and the other end is connected to
In equalizing tank 4, the control of the open and close of the water pump 2 by the valve ball 3 in equalizing tank 4.
The reservoir chamber 6 supplies water and adjusts hydraulic pressure full of water and by equalizing tank 4, and the height of equalizing tank 4 is adjustable；
Inside the equalizing tank 4 be equipped with valve ball 3, the valve ball 3 it is height-adjustable, equalizing tank 4 is matched with valve ball 3 can be accurate
Control height of water level.
The soil sample is filled and is separated between room and reservoir chamber 6 by permeable partition 7, and the height of the permeable partition 7 can
It adjusts, for simulating various sizes of piping section.
More preferably, the chamber uses transparent material；The reservoir chamber 6 is closed structure, and 6 top of reservoir chamber
Offer gas vent 5.The reservoir chamber is closed and is connect with equalizing tank 4 by water pipe, simulates head with 4 head of equalizing tank
Subject to.4 adjustable height of equalizing tank is to simulate required water level, constant level in internal ball valve control equalizing tank 4.
It exports the coating that bankets and presets piping outlet 14, save piping time of origin；And coarse sand isolation strip 11 is set, guarantee to gush
The husky and smooth discharge of water burst.Piping develops channel and buries pore water pressure sensor along journey, and real-time automatic measuring sandy soils are different
The variation of position osmotic pressure.
Under high water level in dike piping simulation test procedure, the displacement of colorful glass microbead 12 can carry out number by taking pictures
Image procossing calculates displacement, can change clay blanket 10 into glass roof as needed at this time to obtain better image effect
Fruit.
Embodiment two
The present embodiment is the test method of dike piping simulation test device under the high water level in embodiment one, including following step
It is rapid:
1) the indoor soil layer for filling certain thick soil according to demand is filled in soil sample, bottom is filled using sand-gravel cushion 8, and middle layer is
Sandy soils 9 are tested, surface layer is laid with clay blanket 10；And to be laid with three row's stained glass in the axial direction micro- in test sandy soils 9
Pearl 12, while pore water pressure sensor 13 and coarse sand isolation strip 11 are buried in test sandy soils 9.
2) it opens water pump 2 to be drawn water from water tank 1 into equalizing tank 4, water flow enters reservoir chamber 6 by pipeline, keeps
The closing of permeable partition 7 is opened permeable partition 7 when the water level in reservoir chamber 6 rises to demand height and is tested.If demand
Height of water level be greater than the height of water level in reservoir chamber 6 then by full of water and adjusting the height of equalizing tank 4 and setting reservoir chamber 6
Determine head, the height of valve ball 3 is set after head needed for choosing, water pump automatically opens when water level is lower than valve ball 3, and water level reaches valve
Water pump is closed when 3 height of ball, and the stabilization of water level is kept with this.
3) that tests that observation tube after water flowing gushes out mouth 14 gushes sand amount, if constant level 10min is kept not occur gushing sand, increases
Height of water level 10cm is added to continue to observe；If occurring gushing sand in a certain constant water level, constant level is kept, sand is gushed and passes through water beach volleyball
Pipeline 15 deposits after entering funnel 16 out, and the water in sand can be discharged from drainage duct, can be recorded at this time by balance 17
Each period gushes sand amount.
4) due to the sand discharge in test sandy soils 9, there is gushing a period of time after sand, test sandy soils 9 will appear change
Shape causes clay blanket 10 also to generate corresponding deformation, and since the water flow in soil layer flows from left to right, the deformation of the soil body also can
It changes as soil particle is displaced to the right, the displacement by observing colorful glass microbead 12, which can obviously observe, occurs piping change
The position of shape, and the size of each period deflection can be recorded by the Digital Image Processing for progress of taking pictures.
Dike piping simulation test device and test method under high water level provided by the invention, when Piping phenomenon occurs,
Sand grains in original stabilizing talent are displaced, and traditional piping experimental study is concentrated mainly on piping critical head and piping
The observation of overall deformation in the process, and rarely have and be related to occurring piping position distortions degree quantitative observation and combine what is deformed to gush sand amount
Measurement, the present invention creatively pass through dike piping simulation test device under design high-water, pass by using pore water pressure
The intracorporal seepage field spatial and temporal distributions of sensor observing earth, and can intuitively observe and the situation of change of analytical soil sample external,
It simulates dike piping and destroys overall process, for that can run for the embankment safety under high water level, emergency is taken precautions against and decision provides technology branch
It holds.
The present invention can destroy indoor model test for dike piping, broken by simulating dike piping under different water levels
It is bad, pore water pressure temporal and spatial evolution is analyzed, dykes and dams process of deformation and failure provides for Accurate Analysis dike piping deformation failure
Convenience.
The present invention has many advantages, such as that principle is simple, operates conveniently, monitor fast, can repeatedly utilize, to test serious forgiveness high.
In the description of the present application, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown is only the present invention and simplified description for ease of description, rather than indicates or imply signified device
Or element must have a particular orientation, construct and operate for specific orientation, thus should not be understood as in present invention protection
The limitation of appearance.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. dike piping simulation test device under a kind of high water level, which is characterized in that including water tank (1), water pump (2), pressure regulation
Water tank (4) and chamber, the chamber is divided into reservoir chamber (6) by permeable partition (7) and soil sample fills room；
Described water pump (2) one end is connected by pipeline with water tank (1), and the other end is connected in equalizing tank (4), the tune
It presses and is equipped with valve ball (3) inside water tank (4), and the valve ball (3) is height-adjustable；The water inlet and tune of the reservoir chamber (6)
It presses the water outlet of water tank (4) to be connected to by pipeline, hydraulic pressure, and the height of equalizing tank (4) is supplied water and adjusted by equalizing tank (4)
It spends adjustable；Control of the open and close of the water pump (2) by the valve ball (3) in equalizing tank (4), equalizing tank (4) and valve
Ball (3) is matched for accurately controlling the head height in reservoir chamber (6)；
The soil sample, which is filled room bottom and filled out, to be covered with sand-gravel cushion (8), setting test sandy soils (9) on sand-gravel cushion (8)；?
It tests in sandy soils (9) and buries pore water pressure sensor (13), be laid in the axial direction at the top of test sandy soils (9) colored
Glass microballoon (12) is used for tracer piping upstream development track；
The soil sample fills room and reservoir chamber (6) side is being provided with piping outlet (14), and the piping outlet (14) passes through water
Husky discharge line (15) connection is drawn；Water sand discharge line (15) outlet lower section is provided with for collecting the funnel for gushing sand
(16)；It is provided with filter device in the funnel (16), the water filtered out passes through the drainage duct that funnel (16) bottom is connected to
Discharge.
2. dike piping simulation test device under high water level according to claim 1, which is characterized in that in test sandy soils
(9) surface layer is also equipped with clay blanket (10) or glass roof, for pressing to test sandy soils (9).
3. dike piping simulation test device under high water level according to claim 1, which is characterized in that the reservoir chamber
(6) closed, and top offers gas vent (5).
4. dike piping simulation test device under high water level according to claim 1, which is characterized in that the soil sample is filled
Room upper end opening.
5. dike piping simulation test device under high water level according to claim 1, which is characterized in that the permeable partition
(7) permeable position and water permeable area is adjustable, for simulating various sizes of piping section.
6. dike piping simulation test device under high water level according to claim 1, which is characterized in that the stained glass
10 ~ 100 μm of the diameter of microballon (12), 2.4 ~ 2.6g/cm of specific gravity3, the average-size and specific gravity and sand of colorful glass microbead (12)
Gravel it is identical.
7. dike piping simulation test device under high water level according to claim 1, which is characterized in that dykes and dams under high water level
In piping simulation test procedure, the displacement of colorful glass microbead (12) can carry out Digital Image Processing calculating displacement by taking pictures
Amount.
8. dike piping simulation test device under high water level according to claim 1, which is characterized in that the sandy soils
(9) grain composition of sand and initial aqueous rate are identical as the grain composition of original state sand and initial aqueous rate in；
In the sandy soils (9), intermediate arrangement piping channel, two sides are filled coarse sand isolation strip (11), guarantee that piping channel is upward
Swim line development.
9. dike piping simulation test device under high water level according to claim 1, which is characterized in that the chamber is adopted
Use transparent material.
10. dike piping simulation experiment method under a kind of high water level characterized by comprising
1) indoor bottom being filled in soil sample and being laid with sand-gravel cushion (8), middle layer is laid with test sandy soils (9), in test sandy soils
(9) pore water pressure sensor (13) and coarse sand isolation strip (11) are buried in, on its surface edge after test sandy soils (9) densification reality
Then the colorful glass microbead (12) of axis direction arranged for interval different colours is laid with clay blanket (10) on surface layer；
2) height for setting equalizing tank (4) and valve ball (3) opens water pump (2) and draws water from water tank (1) into equalizing tank
(4), water flow enters reservoir chamber (6) by pipeline, keeps the closing of permeable partition (7), rises to the water level in reservoir chamber (6)
Permeable partition (7) is opened when elemental height to be tested；
3) elemental height selects lesser head, and that tests that observation tube after water flowing gushes out mouth (14) gushes sand amount, if keeping water level permanent
Fixed a period of time does not occur gushing sand, then increases height of water level 10cm and continue to observe；If occurring gushing sand in a certain constant water level, protect
It holds constant level and records head data, gush sand and deposited afterwards by water sand discharge line (15) into funnel (16), sand
In water filter out after drainage duct discharge, gush sand amount by what balance (17) recorded each period, and pass through simultaneously
Measuring cup records the water yield of each period；
4) due to the sand discharge in test sandy soils (9), occurring gushing a period of time, test sandy soils (9) after sand will appear change
Shape, the deformation can change as sand grains are displaced to the right, by observing the displacement of colorful glass microbead (12) and gushing
The appearance sequence of colorful glass microbead (12) can clearly observe that piping upstream develops the position of deformation in sand, and pass through bat
Capable Digital Image Processing is shone into record the development position of each period piping and develop rate.
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| CN201910682577.8A CN110275009B (en) | 2019-07-26 | 2019-07-26 | Dam piping simulation test device and test method under high water level |
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| CN201910682577.8A CN110275009B (en) | 2019-07-26 | 2019-07-26 | Dam piping simulation test device and test method under high water level |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110716028A (en) * | 2019-10-25 | 2020-01-21 | 清华大学 | Centrifugal model test simulation method and system for damming dam |
| CN111157421A (en) * | 2019-12-30 | 2020-05-15 | 扬州大学 | Device and method for testing water permeability of cement-based material during crack self-repairing |
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| CN112255158A (en) * | 2020-09-30 | 2021-01-22 | 中国水利水电科学研究院 | Embankment foundation piping damage mode experimental device and method |
| CN112697672A (en) * | 2020-12-14 | 2021-04-23 | 中国水利水电科学研究院 | Simulation test device and test method for piping damage of layered embankment foundation |
| CN112697673A (en) * | 2020-12-14 | 2021-04-23 | 中国水利水电科学研究院 | Visual test device and method for contact seepage damage of through-embankment pressureless culvert pipe |
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| CN113155698A (en) * | 2021-04-06 | 2021-07-23 | 长江水利委员会长江科学院 | Physical simulation device for large-scale embankment piping dangerous case evolution mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110716028B (en) * | 2019-10-25 | 2021-04-27 | 清华大学 | Centrifugal model test simulation method and system for damming dam |
| CN110716028A (en) * | 2019-10-25 | 2020-01-21 | 清华大学 | Centrifugal model test simulation method and system for damming dam |
| CN111157421A (en) * | 2019-12-30 | 2020-05-15 | 扬州大学 | Device and method for testing water permeability of cement-based material during crack self-repairing |
| CN111877251A (en) * | 2020-07-03 | 2020-11-03 | 重庆交通大学 | Model test method for simulating development of dam piping channel and model thereof |
| CN111877251B (en) * | 2020-07-03 | 2021-12-03 | 重庆交通大学 | Model test method for simulating development of dam piping channel and model thereof |
| CN111766175A (en) * | 2020-07-08 | 2020-10-13 | 华侨大学 | Model device for simulating water and sand leakage of sandy soil stratum and using method |
| CN112255158A (en) * | 2020-09-30 | 2021-01-22 | 中国水利水电科学研究院 | Embankment foundation piping damage mode experimental device and method |
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| CN112697673B (en) * | 2020-12-14 | 2021-09-17 | 中国水利水电科学研究院 | Visual test device and method for contact seepage damage of through-embankment pressureless culvert pipe |
| CN112697672A (en) * | 2020-12-14 | 2021-04-23 | 中国水利水电科学研究院 | Simulation test device and test method for piping damage of layered embankment foundation |
| CN112834406A (en) * | 2021-01-08 | 2021-05-25 | 南京福欧地下空间数据科技有限公司 | Foundation pit piping image acquisition device and use method |
| CN112834406B (en) * | 2021-01-08 | 2022-08-09 | 南京福欧地下空间数据科技有限公司 | Foundation pit piping image acquisition device and use method |
| CN112986536A (en) * | 2021-02-22 | 2021-06-18 | 中国水利水电科学研究院 | Device and method for simulating contact scouring damage of crossing-dike culvert pipe |
| CN112986536B (en) * | 2021-02-22 | 2022-02-08 | 中国水利水电科学研究院 | Device and method for simulating contact scouring damage of crossing-dike culvert pipe |
| CN113155698A (en) * | 2021-04-06 | 2021-07-23 | 长江水利委员会长江科学院 | Physical simulation device for large-scale embankment piping dangerous case evolution mechanism |
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