CN109723025A - Underground structure boundary seepage test device and using method thereof - Google Patents
Underground structure boundary seepage test device and using method thereof Download PDFInfo
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- CN109723025A CN109723025A CN201811625101.2A CN201811625101A CN109723025A CN 109723025 A CN109723025 A CN 109723025A CN 201811625101 A CN201811625101 A CN 201811625101A CN 109723025 A CN109723025 A CN 109723025A
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- 238000012360 testing method Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 238000004088 simulation Methods 0.000 claims abstract description 41
- 238000005259 measurement Methods 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 22
- 239000002689 soil Substances 0.000 claims abstract description 18
- 239000011449 brick Substances 0.000 claims description 8
- 238000001764 infiltration Methods 0.000 claims description 8
- 230000008595 infiltration Effects 0.000 claims description 8
- 238000005325 percolation Methods 0.000 claims description 8
- 238000004078 waterproofing Methods 0.000 claims description 5
- 239000004746 geotextile Substances 0.000 claims description 3
- 230000003020 moisturizing effect Effects 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 238000011160 research Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Sewage (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to a seepage test device and a using method thereof, in particular to an underground structure boundary seepage test device and a using method thereof, wherein the underground structure boundary seepage test device comprises a water supply device, a simulation box body and a supporting device; the water supply device is connected with a water supply pipeline; the simulation box body comprises a simulation box body, a constant drainage device and a measurement drainage device, and during use, backfill with different preset thicknesses and different materials is filled into the simulation box body, and the test device is used for measurement. The boundary seepage test device for the underground structure and the using method thereof are simple and easy to operate, and can effectively simulate boundary seepage conditions of different water head heights, different boundary conditions and different soil layer thicknesses, so that the influence of a boundary effect on foundation pit seepage is analyzed.
Description
Technical field
The present invention relates to a kind of seepage flow test device and its application methods, simulate the seepage flow situation of underground structure, specifically relate to
And a kind of underground structure boundary seepage flow test device and its application method.
Background technique
Seepage theory has extensively in many fields such as water conservancy, civil engineering, water supply and drainage, environmental protection, geology, petroleum, chemical industry
General application.As building site tends to nervous, the utilization of the underground space is gradually increased, the foundation of building gradually adds
Deep, influence of the earth's surface charge for remittance amount of service stage place to basement bottom plate head pressure is also gradually increased.Due to construction method
Difference, underground structure outside is not also identical as the boundary seepage flow situation of backfill, and the water of on-site, is returned at the soil property of backfill
The factors such as the thickness to banket will affect the boundary seepage flow situation on the outside of underground structure with backfill.Therefore, underground structure is established
Boundary seepage flow test device carries out experimental study to the factor for influencing boundary seepage flow situation, measures under different condition, the seepage flow of water
Feature provides for hydraulic structure construction, Drainage Design according to being particularly important.
Summary of the invention
Based on considerations above, this paper presents a kind of underground structure boundary seepage flow test device and its application methods, can
Effectively simulate the boundary seepage flow situation of different head heights, various boundary and different soil thickness.
The present invention, which is that the following technical solution is employed, to be realized:
A kind of underground structure boundary seepage flow test device, including waterworks, analog unit and support device；
The waterworks are connect with water supply line, for filling the water into analog unit；
The analog unit includes simulation box ontology, constant drainage arrangement and measurement drainage arrangement, the simulation box ontology
Bottom among be provided with measurement drainage arrangement, the two sides of the bottom of the simulation box ontology are fixed in the support device described
Constant drainage arrangement is set on the side wall of simulation box ontology；
The measurement drainage arrangement and constant drainage arrangement are provided with control switch valve.
Preferably, the constant drainage arrangement is the constant draining for being set to this body sidewall of simulation box different height
Pipe, the constant drainpipe are provided with control switch valve.
Preferably, described this body sidewall of analog unit is thick brick wall, inside carries out plastering and water-proofing treatment.
Preferably, the bottom plate of the analog unit ontology is concrete slab, and there is certain gradient.
Preferably, the bottom of the model casing ontology carries out plastering processing with mortar, and do on concrete slab 2%~
4% gradient is doing 5%~8% gradient close to Near Pipelines.
A kind of application method of underground structure boundary seepage flow test device is tried using a kind of underground structure boundary seepage flow
Experiment device, comprising the following steps:
(1) the successively filling setting test backfill of thickness in Xiang Suoshu simulation box ontology, water proof layer material and other not
The material of same layer, according in every layer of material requested dosage filling simulation box ontology, then placement in layers is compacted, and determines filling out for material
Build compactness and placement in layers thickness；
(2) waterworks are connected into water system, open water inlet flow valve, control inflow is adjusted, to simulation box sheet
Water filling in vivo opens the control switch valve of the constant drainpipe of setting test height, sets stable level above backfill
Surely the head height tested.
(3) the control switch valve for opening measurement drainage arrangement, measures the duration for reaching a certain amount of infiltration, repeats two~tri-
Group calculates percolation flow velocity average value.
(4) boundary seepage discharge, boundary seepage discharge=Measured Seepage amount-soil layer seepage discharge, soil are calculated according to Measured Seepage amount
Layer seepage discharge is calculated by the infiltration coefficient and native sectional area of different backfill layer materials.
Preferably, moisturizing is carried out to brick in advance before the material of layer-by-layer filling setting test thickness, to simulation box ontology
The interior pre- height of water level for adding water to setting test after standing a period of time, opens measurement drainage arrangement, after water is discharged, as early as possible
Start to banket and starts to measure.
Preferably, the nozzle top for the measurement drainage arrangement that the simulation box ontology is equipped with is provided with Dense mesh screen, it is described
Dense mesh screen top is provided with wet geotextiles.
The beneficial effects of the present invention are: using a kind of underground structure boundary seepage flow test device of the present invention and its making
With method, operation is simple.The boundary of different head heights, various boundary and different soil thickness can effectively be simulated
Seepage flow situation changes the intracorporal head height of simulation box by simulating identical boundary condition, studies different heights of water level to returning
The influence for the boundary percolation flow velocity banketed；Under the conditions of simulating identical height of water level, change the material on the inside of analog unit, research is not
Influence with boundary condition to the boundary percolation flow velocity of backfill；Identical height of water level is simulated, backfill in analog unit is changed
Thickness, influence of the different soil thickness to the boundary percolation flow velocity of backfill, to analyze boundary effect to the shadow of Seepage of Foundation Pit
It rings.
Detailed description of the invention
Fig. 1 is the schematic diagram of the section structure of front view of the invention；
Fig. 2 is the schematic diagram of the section structure of the top view of simulation box body bottom portion of the invention.
In figure:
1, waterworks；2, analog unit；3, support device；21, constant drainage arrangement；22, drainage arrangement is measured；23,
Simulation box ontology；220, drainage hole.
Specific embodiment
In order to which the object of the invention, technical solution is more clearly understood, with reference to the accompanying drawing, the present invention is made further detailed
It describes in detail bright.
As shown in Fig. 1~2, a kind of underground structure boundary seepage flow test device of the present invention, including waterworks 1,
Analog unit 2 and support device 3；
The waterworks 1 are connect with water supply line, for filling the water into analog unit 2；
The analog unit 2 includes simulation box ontology 23, constant drainage arrangement 21 and measurement drainage arrangement 22, the simulation
Measurement drainage arrangement 22 is provided among the bottom of case ontology 23, the branch is fixed in the two sides of the bottom of the simulation box ontology 23
The constant drainage arrangement 21 is set on the side wall of simulation box ontology 23 on support arrangement 3；
The measurement drainage arrangement 22 and constant drainage arrangement 21 are provided with control switch valve.
The constant drainage arrangement 21 is the constant drainpipe for being set to the 23 side wall different height of simulation box ontology, institute
It states constant drainpipe and is provided with control switch valve.It is stayed at 23 side wall different height of simulation box ontology and sets through-hole, connect PVC
Pipe, as constant drainpipe, the spacing between adjacent constant drainpipe is identical, to control height of water level, simulates different heads
Highly, water-proofing treatment is made in pvc pipe and 2 side wall junction of analog unit.
2 body sidewalls of the analog unit are thick brick wall, and inside carries out plastering and water-proofing treatment.The analog unit 2 four
Week builds 200mm thickness brick wall, to simulate outer wall of basement, then carries out paving using SBS waterproof roll, does water-proofing treatment, mould
Quasi- tanking.
The bottom plate of 2 ontology of analog unit is concrete slab, and has certain gradient.2 bottom plate of analog unit uses
Concrete reinforcement bottom plate, and it is aerial to lay bricks, as support device 3, bottom plate center, which is stayed, sets drainage hole 220, and drainage hole 220 is lower to be installed
The pvc pipe of diameter 20mm, as measurement drainage arrangement 22, pvc pipe is equipped with control switch valve.
The bottom of 2 ontology of analog unit carries out bottom plate with mortar and surrounding plastering is handled, and does on concrete slab
2% gradient is doing 5% gradient close to Near Pipelines.Before paving SBS waterproof roll, bottom plate first is carried out with cement mortar
And surrounding plastering, 2% gradient is done on bottom plate, so that flowing water quickly enters in pipe, 5% gradient is done at Near Pipelines 150mm.
A kind of application method of underground structure boundary seepage flow test device is tried using a kind of underground structure boundary seepage flow
Experiment device, comprising the following steps:
(1) the successively filling setting test backfill of thickness in Xiang Suoshu simulation box ontology 23, water proof layer material and other
The material of different layers, according in every layer of material requested dosage filling simulation box ontology 23, then placement in layers is compacted, and determines material
Fill compactness and placement in layers thickness；
(2) waterworks 1 are connected into water system, open water inlet flow valve, control inflow is adjusted, to simulation box sheet
Water filling in body 23 opens the control switch valve of the constant drainpipe of setting test height, makes stable level above backfill
Set the head height of test.
(3) the control switch valve of measurement drainage arrangement 22 is opened, the measurement decentralization of drainage arrangement 22 installs holding for graticule
Connection device measures the duration for reaching a certain amount of infiltration, measures water percolating capacity.Two~tri- groups are repeated, percolation flow velocity average value is calculated.
(4) boundary seepage discharge, boundary seepage discharge=Measured Seepage amount-soil layer seepage discharge, soil are calculated according to Measured Seepage amount
Layer seepage discharge is calculated by the infiltration coefficient and native sectional area of different backfill layer materials.
According to Darcy's law: in the seepage flow of laminar condition, seepage velocity v is directly proportional to the first power of hydraulic gradient I, and
It is related with the property of soil.I.e.
V=KI or Q=KFI
In formula
V---- section Mean velocity of seepage, m/s；
The proportionality coefficient of the water permeability of K---- reflection soil, referred to as native infiltration coefficient, it is equivalent to hydraulic gradient I=1
When seepage velocity, therefore its dimension is identical as flow velocity (m/s), and the infiltration coefficient of various soil can refer to reference book or other data are looked into
It reads；
I---- hydraulic gradient, i.e., along the head difference in water (flow) direction unit length；
F---- soil sectional area (m2)；
Q---- seepage discharge (m3/ s), i.e., the flow of native sectional area F is flowed through in the unit time.
(5) by constant drainage arrangement 21 and waterworks 1, stablize water in different set test height, to change mould
The quasi- intracorporal head height of case, the identical material of each layer same thickness is inserted into simulation box ontology, repeats step (1)~(4)
Study influence of the different heights of water level to the boundary percolation flow velocity of backfill；Soil thickness is backfilled by changing in analog unit, is made
With constant drainage arrangement 21 and waterworks 1, stablizes water in same settings test height, repeat step (1)~(4) diagnostic cast
Under the conditions of intending identical height of water level, influence of the different soil thickness to the boundary percolation flow velocity of backfill；By changing simulation box
Internal side wall uses material, using constant drainage arrangement 21 and waterworks 1, stablizes water in same settings test height,
Under the conditions of repeating the identical height of water level of step (1)~(4) research simulation, boundary seepage flow of the research various boundary to backfill
The influence of speed, and then analyze influence of the boundary effect to Seepage of Foundation Pit.
Moisturizing, the pre-add water into simulation box ontology 23 are carried out to brick in advance before the material of layer-by-layer filling setting test thickness
To the height of water level of setting test, after standing a period of time, measurement drainage arrangement 22 is opened, after water is discharged, starts to fill out as early as possible
Soil measures, to prevent absorption of 2 side wall of analog unit to water, and prevents moisture evaporation from impacting to measurement.
The nozzle top for the measurement drainage arrangement 22 that the simulation box ontology 23 is equipped with is provided with Dense mesh screen, the Dense mesh screen
Top is provided with wet geotextiles, it is ensured that the water of 2 bottom of analog unit flows out rapidly, while preventing backfill with the stream of dampening
It moves and is lost.
The foregoing is merely presently preferred embodiments of the present invention and oneself, not with the present invention for limitation, it is all in essence of the invention
Made impartial modifications, equivalent substitutions and improvements etc., should be included in patent covering scope of the invention within mind and principle.
Claims (8)
1. a kind of underground structure boundary seepage flow test device, which is characterized in that including waterworks (1), analog unit (2) and branch
Support arrangement (3)；
The waterworks (1) connect with water supply line, for the water filling into analog unit (2)；
The analog unit (2) includes simulation box ontology (23), constant drainage arrangement (21) and measures drainage arrangement (22), described
Measurement drainage arrangement (22) is provided among the bottom of simulation box ontology (23), the two sides of the bottom of the simulation box ontology (23) are solid
Due on the support device (3), the constant drainage arrangement (21) is set on the side wall of simulation box ontology (23)；
The measurement drainage arrangement (22) and constant drainage arrangement (21) are provided with control switch valve.
2. a kind of underground structure boundary seepage flow test device according to claim 1, which is characterized in that the constant draining
Device (21) is the constant drainpipe for being set to simulation box ontology (23) the side wall different height, the constant drainpipe setting
There is control switch valve.
3. a kind of underground structure boundary seepage flow test device according to claim 1, which is characterized in that the model casing sheet
Body sidewall is thick brick wall, and inside carries out plastering and water-proofing treatment.
4. a kind of underground structure boundary seepage flow test device according to claim 1, which is characterized in that the model casing sheet
The bottom plate of body is concrete slab, and has certain gradient.
5. a kind of underground structure boundary seepage flow test device according to claim 4, which is characterized in that the model casing sheet
The bottom of body carries out plastering processing with mortar, and 2%~4% gradient is done on concrete slab, is doing 5% close to Near Pipelines
~8% gradient.
6. the application method of a kind of underground structure boundary seepage flow test device, using as described in any one of claim 1-5
Underground structure boundary seepage flow test device, which comprises the following steps:
1) backfill of successively filling setting test thickness, water proof layer material and other differences in Xiang Suoshu simulation box ontology (23)
The material of layer, according in every layer of material requested dosage filling simulation box ontology (23), then placement in layers is compacted, and determines material
Fill compactness and placement in layers thickness；
2) waterworks (1) are connected into water system, open water inlet flow valve, control inflow is adjusted, to simulation box ontology
(23) water filling in opens the control switch valve of the constant drainpipe of setting test height, makes stable level above backfill
Set the head height of test；
3) the control switch valve for opening measurement drainage arrangement (22), measures the duration for reaching a certain amount of infiltration, repeats two~tri-
Group calculates percolation flow velocity average value；
4) boundary seepage discharge, boundary seepage discharge=Measured Seepage amount-soil layer seepage discharge, soil layer seepage flow are calculated according to Measured Seepage amount
Amount is calculated by the infiltration coefficient and native sectional area of different backfill layer materials.
7. a kind of application method of underground structure boundary seepage flow test device according to claim 6, which is characterized in that
Moisturizing is carried out to brick in advance before the material of successively filling setting test thickness, adds water to setting examination in advance into simulation box ontology (23)
The height of water level tested after standing a period of time, opens measurement drainage arrangement (22), after water is discharged, starts progress of banketing as early as possible
Measurement.
8. a kind of application method of underground structure boundary seepage flow test device according to claim 6, which is characterized in that institute
The nozzle top for stating the measurement drainage arrangement (22) that simulation box ontology (23) is equipped with is provided with Dense mesh screen, and the Dense mesh screen top is set
It is equipped with wet geotextiles.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111982785A (en) * | 2020-08-31 | 2020-11-24 | 甘肃省建材科研设计院有限责任公司 | Artificial water simulation test device for hydrophobic particles and test method thereof |
| CN113358531A (en) * | 2021-06-28 | 2021-09-07 | 重庆大学 | Transparent soil model test device for simulating influence of underground retaining wall structure on groundwater seepage and test method thereof |
| CN114441406A (en) * | 2022-01-05 | 2022-05-06 | 中交第四航务工程局有限公司 | Test system and test method for simulating local seepage of waterproof curtain of foundation pit |
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| CN113358531B (en) * | 2021-06-28 | 2024-03-12 | 重庆大学 | Transparent soil model test device and method for simulating influence of underground retaining wall structure on groundwater seepage |
| CN114441406A (en) * | 2022-01-05 | 2022-05-06 | 中交第四航务工程局有限公司 | Test system and test method for simulating local seepage of waterproof curtain of foundation pit |
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