CN105784562A - Transparent soil test device used for simulating seepage of foundation pit dewatering confined aquifer underground water - Google Patents
Transparent soil test device used for simulating seepage of foundation pit dewatering confined aquifer underground water Download PDFInfo
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- CN105784562A CN105784562A CN201610129898.1A CN201610129898A CN105784562A CN 105784562 A CN105784562 A CN 105784562A CN 201610129898 A CN201610129898 A CN 201610129898A CN 105784562 A CN105784562 A CN 105784562A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 239000002689 soil Substances 0.000 title claims abstract description 19
- 238000012360 testing method Methods 0.000 title abstract description 10
- 239000003673 groundwater Substances 0.000 claims abstract description 20
- 238000004088 simulation Methods 0.000 claims description 27
- 239000011521 glass Substances 0.000 claims description 18
- 230000009471 action Effects 0.000 claims description 16
- 238000003556 assay Methods 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 229910000754 Wrought iron Inorganic materials 0.000 claims description 9
- 239000000700 radioactive tracer Substances 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 241000209094 Oryza Species 0.000 claims description 6
- 235000007164 Oryza sativa Nutrition 0.000 claims description 6
- 235000009566 rice Nutrition 0.000 claims description 6
- 239000010985 leather Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 4
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 2
- 238000009530 blood pressure measurement Methods 0.000 claims description 2
- 238000003780 insertion Methods 0.000 abstract description 3
- 230000037431 insertion Effects 0.000 abstract description 3
- 238000005086 pumping Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 abstract 1
- 238000005325 percolation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000037361 pathway Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- -1 plank 13 Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000005336 safety glass Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- G01N33/24—Earth materials
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Pathology (AREA)
- Immunology (AREA)
- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- Geology (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Remote Sensing (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Dispersion Chemistry (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to a transparent soil test device use for simulating seepage of foundation pit dewatering confined aquifer underground water.The transparent soil test device use for simulating seepage of foundation pit dewatering confined aquifer underground water comprises a model casing, a cover plate arranged in the model casing, a plank simulating a concrete diaphragm wall, water tank elements connected on both sides of the model casing to control confined groundwater level, and a piezometer tube system used for measuring the water pressure of strata of different depths and arranged on the backface of the model casing.Compared with the existing technology, the seepage paths of water flows around a waterproof curtain can be directly observed, and seepage path rules, seepage velocity and other relevant parameters can be accurately analyzed through photos shot by a high-speed camera; and seepage laws of distances between different concrete diaphragm walls and the plane and the section of a filter tube can be obtained by changing the insertion ratio of the concrete diaphragm walls and the length of a pumping filtering pipe.
Description
Technical field
The invention belongs to foundation pit dewatering project technical field, especially relate to a kind of transparent soil assay device simulating base pit dewatering artesian aquifer seepage action of ground water.
Background technology
Along with China's rapid development of economy, urbanization launches in China, for meeting the demand of the basic functions such as growing citizens' activities, orbit traffic transfer, business, parking, particularly in the dense urban centers that land used is more nervous, the exploitation of the underground space have become as a kind of inundant trend.Base pit engineering is as the important component part of underground engineering, and its scale constantly expands, and constantly develops to ultra-deep, overlarge area direction from small-sized superficial part foundation ditch.Particularly in the Yangtze River Delta Region that economy is the most flourishing, owing to level of ground water is higher, base pit dewatering must be carried out before excavation of foundation pit, however on a large scale, on a large scale, the impact that geological environment around is caused of long precipitation very important.Therefore, how improving base pit dewatering efficiency, how effectively the impact that geological environment around causes is become engineering circles and the emphasis of many focus of attentions by prevention precipitation, is also problem demanding prompt solution in present stage engineering construction.
In view of the method for numerical simulation instructs the reliability of engineering practice and the material parameter of input to have close contacting, actual measurement scheme does not possess repeatability, being difficult to disclose a certain parameter affecting laws to foundation pit dewatering project, model test is a kind of important means studying base pit dewatering mechanism.Chinese patent CN105369812A discloses the pressure water head defining method of foundation ditch pumping with constant rate under a kind of suspension type water-stop curtain, obtaining on the basis of artesian aquifer soil layer information and information of drawing water, according to Darcy's law and mass conservation principle, for constant flow pump process in foundation ditch, determine the changing value of the level of ground water that groundwater level when water-stop curtain is introduced into water-bearing layer and water-stop curtain cause, so that it is determined that artesian water water level inside and outside foundation ditch during pumping with constant rate in foundation ditch under suspension type water-stop curtain.But the structure of the not open specific experiment device adopted of this patent, it is impossible to realize the simulation to base pit dewatering artesian aquifer seepage action of ground water.
Summary of the invention
Defect that the purpose of the present invention is contemplated to overcome above-mentioned prior art to exist and provide and can directly observe the permeation pathway of water-stop curtain ambient water, by the transparent soil assay device of the simulation base pit dewatering artesian aquifer seepage action of ground water of its relevant parameter such as percolation path rule and percolation flow velocity of the photo accurate analysis captured by high-speed camera；By changing the insertion ratio of ground-connecting-wall, the length of the chimney filter that draws water, and the percolation law of different ground-connecting-wall and the plane of chimney filter, section distance.
The purpose of the present invention can be achieved through the following technical solutions:
The transparent soil assay device of simulation base pit dewatering artesian aquifer seepage action of ground water, including:
Model casing,
It is arranged on the plank of the cover plate in model casing, simulation ground-connecting-wall,
It is connected to model casing both sides, controls the cistern assembly of artesian water water level,
Measure the pressure-measuring pipe system of the hydraulic pressure on the stratum of different depth, be connected to the back side of model casing.
Described cover plate includes inter panel and is arranged on the side cover plate of inter panel both sides.
Described inter panel is hollow form structure, and upper surface center is provided with perforate, and lower surface is provided with arranges the perforate simulating the well casing that draws water,
Described side cover plate offers the tracer hole installing tracer pipe.
The described simulation well casing that draws water is the steel pipe installing filter screen additional, is connected between in the perforate that cover plate lower surface is offered.
Described inter panel and be arranged on the side cover plate of inter panel both sides and all cover on the plank being located at simulation ground-connecting-wall.
The board surface of described simulation ground-connecting-wall is through polishing, and bottom is zigzag.
Described cistern assembly is by water tank, water pipe, and threaded rod iron forms,
The bottom of described water tank offers two perforates, and one of them perforate, through water pipe and model casing UNICOM, another perforate and ft connection, separates through glass plate between two perforates.
Described water tank cover is located on threaded rod iron, and the screw thread along rod iron moves up and down.
The back side of described model casing is provided with steel plate, and on this steel plate, average mark is furnished with pressure tap, and each pressure measurement aperture solid plastic stub seals.
Described pressure-measuring pipe system is made up of plank, glass tubing and rice ruled paper,
Described glass tubing is embedded in the groove offered on plank, and this glass tubing is connected with the pressure tap at model casing back is carried out water-pressure survey by leather hose, and described rice ruled paper is attached on the plank of glass tubing behind expression scale.
Compared with prior art, the invention have the advantages that
1, the permeation pathway of water-stop curtain ambient water can directly be observed；
2, by its relevant parameter such as percolation path rule and percolation flow velocity of the photo accurate analysis captured by high-speed camera；
3, by changing the insertion ratio of ground-connecting-wall, the length of the chimney filter that draws water, and the percolation law of different ground-connecting-wall and the plane of chimney filter, section distance；
4, repeatable utilization after device use；
5, a certain parameter affecting laws to foundation pit dewatering project can be disclosed.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of the present invention；
Fig. 2 is the backsight structural representation of the present invention；
Fig. 3 is the plan structure schematic diagram of model casing；
Fig. 4 is the structural representation of side cover plate；
Fig. 5 is the plan structure schematic diagram of inter panel；
Fig. 6 be inter panel look up structural representation；
Fig. 7 is the structural representation of water tank；
Fig. 8 is the structural representation of the plank of simulation ground-connecting-wall；
Fig. 9 is the structural representation of pressure-measuring pipe system.
In figure, 1-model casing, 2-water tank, 3-water pipe, the threaded rod iron of 4-, 5-side cover plate, the plank of 6-simulation ground wall, 7-inter panel, 8-pressure tap, 9-suction eye, 10-tracer hole, 11-well casing hole, 12-draws water well casing, 13-plank, 14-glass tubing, 15-groove, 16-rice ruled paper.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
Embodiment
A kind of transparent soil assay device simulating base pit dewatering artesian aquifer seepage action of ground water, as shown in Figure 1-2, this assay device includes the assemblies such as model casing 1, water tank 2, water pipe 3, threaded rod iron 4, cover plate 5, inter panel 7, simulation the ground plank 6 of wall, the well casing 12 that draws water, plank 13, glass tubing 14, rice ruled paper 16 to structure.Model casing 1 is rectangular, its structure as it is shown on figure 3, around sidewall and front side wall be safety glass, rear wall is steel plate, and it is 10mm that rear wall steel plate devises the diameter being evenly distributed, between two the pressure tap 8 of interval 100mm.Sealing pressure tap 8 with the solid plastic stub of equivalent diameter, the pore pressure to survey certain point just extracts solid plastic stub, and is connected with the glass tubing 14 in pressure-measuring pipe system by leather hose simultaneously.The structure of pressure-measuring pipe system is as shown in Figure 9.It is made up of plank 13, glass tubing 14 and rice ruled paper 16.Glass tubing 14 is to be connected with plank 13 by being embedded in the plank projection of fluted 15, sticks meter ruled paper 16 for representing scale on glass tubing 14 plank 13 behind.Glass tubing 14 is connected by the pressure tap 8 of leather hose with model casing 1 back and completes the measurement work of water pressure.
The structural representation of the cover plate on the internal both sides of model casing is as shown in Figure 4；The side cover plate 5 of both sides is provided with the tracer hole 10 that three diameters are 5mm, is used for installing tracer pipe, and in test injects tracer by this tracer pipe.
The structure of the inter panel 7 within model casing is as seen in figs. 5-6.Model casing 1 indoor design has the cover plate 5 of two pieces of both sides and middle inter panel 7, the suction eye 9 that inter panel 7 central upper portion has diameter to be 20mm, bottom is interval 25mm, the well casing hole 11 (being used for arranging the well casing that draws water) of diameter 7mm, intermediate altitude is the hollow thickness of 5mm, installing internal diameter according to design conditions in the well casing hole 11 needed before test is 6mm, external diameter is the steel pipe of 7mm, and add the filter screen of 200 orders, formation is drawn water well casing 12, suction eye 9 is provided with metal valve, process of the test is opened valve and is drawn water by leather hose connection peristaltic pump.
Cisten mechanism figure on model casing limit is as shown in Figure 7；You Liangge hole, water tank 2 bottom, one of them hole is connected by water pipe 3 and model casing 1 are internal, and another hole is connected with the external world, by the injection testing liquid that is connected to come with little water pump during test.In the middle part of water tank 2, it is provided with the glass plate of certain altitude, is used for isolating two holes.By the height of threaded rod iron 4 energy regulating tank 2, thus can in test control the initial water level of artesian water.
The structural representation of the plank of the simulation ground-connecting-wall within model casing is as shown in Figure 8；Being zigzag bottom the plank 6 of simulation ground-connecting-wall, surface is through polishing.
Claims (10)
1. the transparent soil assay device of simulation base pit dewatering artesian aquifer seepage action of ground water, it is characterised in that this device includes:
Model casing,
It is arranged on the plank of the cover plate in model casing, simulation ground-connecting-wall,
It is connected to model casing both sides, controls the cistern assembly of artesian water water level,
Measure the pressure-measuring pipe system of the hydraulic pressure on the stratum of different depth, be connected to the back side of model casing.
2. the transparent soil assay device of simulation base pit dewatering artesian aquifer seepage action of ground water according to claim 1, it is characterised in that described cover plate includes inter panel and is arranged on the side cover plate of inter panel both sides.
3. the transparent soil assay device of simulation base pit dewatering artesian aquifer seepage action of ground water according to claim 2, it is characterised in that
Described inter panel is hollow form structure, and upper surface center is provided with perforate, and lower surface is provided with arranges the perforate simulating the well casing that draws water,
Described side cover plate offers the tracer hole installing tracer pipe.
4. the transparent soil assay device of simulation base pit dewatering artesian aquifer seepage action of ground water according to claim 3, it is characterised in that the described simulation well casing that draws water is the steel pipe installing filter screen additional, is connected between in the perforate that cover plate lower surface is offered.
5. the transparent soil assay device of simulation base pit dewatering artesian aquifer seepage action of ground water according to claim 1, it is characterised in that described inter panel and be arranged on the side cover plate of inter panel both sides and all cover on the plank being located at simulation ground-connecting-wall.
6. simulate the transparent soil assay device of base pit dewatering artesian aquifer seepage action of ground water according to claim 1 or 5, it is characterised in that the board surface of described simulation ground-connecting-wall is through polishing, and bottom is zigzag.
7. the transparent soil assay device of simulation base pit dewatering artesian aquifer seepage action of ground water according to claim 1, it is characterised in that described cistern assembly is by water tank, water pipe, and threaded rod iron forms,
The bottom of described water tank offers two perforates, and one of them perforate, through water pipe and model casing UNICOM, another perforate and ft connection, separates through glass plate between two perforates.
8. the transparent soil assay device of simulation base pit dewatering artesian aquifer seepage action of ground water according to claim 7, it is characterised in that described water tank cover is located on threaded rod iron, and the screw thread along rod iron moves up and down.
9. the transparent soil assay device of simulation base pit dewatering artesian aquifer seepage action of ground water according to claim 1, it is characterized in that, the back side of described model casing is provided with steel plate, and on this steel plate, average mark is furnished with pressure tap, and each pressure measurement aperture solid plastic stub seals.
10. the transparent soil assay device of simulation base pit dewatering artesian aquifer seepage action of ground water according to claim 9, it is characterised in that described pressure-measuring pipe system is made up of plank, glass tubing and rice ruled paper,
Described glass tubing is embedded in the groove offered on plank, and this glass tubing is connected with the pressure tap at model casing back is carried out water-pressure survey by leather hose, and described rice ruled paper is attached on the plank of glass tubing behind expression scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610129898.1A CN105784562A (en) | 2016-03-08 | 2016-03-08 | Transparent soil test device used for simulating seepage of foundation pit dewatering confined aquifer underground water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610129898.1A CN105784562A (en) | 2016-03-08 | 2016-03-08 | Transparent soil test device used for simulating seepage of foundation pit dewatering confined aquifer underground water |
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| CN105784562A true CN105784562A (en) | 2016-07-20 |
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| CN201610129898.1A Pending CN105784562A (en) | 2016-03-08 | 2016-03-08 | Transparent soil test device used for simulating seepage of foundation pit dewatering confined aquifer underground water |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108205057A (en) * | 2017-12-06 | 2018-06-26 | 湖南大学 | Underground engineering blocks the simulation test device that water circulation path causes city ground subsidence |
| CN109853646A (en) * | 2019-04-02 | 2019-06-07 | 江苏省地质矿产局第三地质大队 | Indoor simulation test device and method for confined water precipitation of foundation pit |
| CN110221042A (en) * | 2019-06-27 | 2019-09-10 | 合肥工业大学 | A kind of device of simulating excavation stress field and Analysis of Ground-water Seepage Field coupling effect |
| CN111456118A (en) * | 2020-04-05 | 2020-07-28 | 席早阳 | Foundation pit model test device for simulating underground water level change in foundation pit excavation process |
| CN113791013A (en) * | 2021-08-31 | 2021-12-14 | 长江岩土工程有限公司 | Continuous water injection test method for drilling holes in soil impervious body of dam of dangerous reservoir |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108205057A (en) * | 2017-12-06 | 2018-06-26 | 湖南大学 | Underground engineering blocks the simulation test device that water circulation path causes city ground subsidence |
| CN108205057B (en) * | 2017-12-06 | 2020-08-11 | 湖南大学 | Simulation test device for urban stratum collapse caused by water cut-off circulation path of underground engineering |
| CN109853646A (en) * | 2019-04-02 | 2019-06-07 | 江苏省地质矿产局第三地质大队 | Indoor simulation test device and method for confined water precipitation of foundation pit |
| CN110221042A (en) * | 2019-06-27 | 2019-09-10 | 合肥工业大学 | A kind of device of simulating excavation stress field and Analysis of Ground-water Seepage Field coupling effect |
| CN111456118A (en) * | 2020-04-05 | 2020-07-28 | 席早阳 | Foundation pit model test device for simulating underground water level change in foundation pit excavation process |
| CN113791013A (en) * | 2021-08-31 | 2021-12-14 | 长江岩土工程有限公司 | Continuous water injection test method for drilling holes in soil impervious body of dam of dangerous reservoir |
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Application publication date: 20160720 |