Testing device for exploring obstructing influence of underground building on underground water blind

Abstract

The utility model relates to a test device which is used for exploring the blocking influence of an underground building on an underground water blind. The test device comprises a box body, a simulation building, a plurality of pressure monitoring devices and a controller. The box body comprises a first cavity, a second cavity and a third cavity which are communicated with one another. The first cavity is connected with a water supply system, a water outlet is formed in the cavity wall of the third cavity, a soil body is contained in the second cavity, the simulation building is buried in the soil body, and the pressure monitoring devices are arranged on the periphery of the simulation building at equal intervals. When the water supply system continuously adds liquid into the first chamber, the liquid flows into the second chamber, flows through the soil body, enters the third chamber and is discharged from the water outlet, so that a real underground water seepage state is simulated, and a technician analyzes a change rule according to liquid pressure information detected by the pressure monitoring device; therefore, the influence of an underground building on underground water obstruction is explored in a laboratory stage, and a theoretical basis is provided for early-stage design and construction and later-stage engineering operation of underground engineering.

Description

Technical Field

[0001] This application relates to the field of building construction technology, and in particular to an experimental device for investigating the influence of underground structures on groundwater curtain obstruction. Background Technology

[0002] In the construction of underground engineering projects, engineers are primarily concerned with the impact of groundwater seepage on the structure, construction difficulty, and long-term operation and maintenance of underground structures. However, the existence of underground structures can also obstruct groundwater flow, intercepting or dividing it to alter its path, water level distribution, and hydraulic connections, thereby changing the surrounding hydrogeological environment. These alterations can easily lead to dangerous accidents such as ground subsidence and building cracking. Therefore, anticipating the impact of groundwater-blocking structures before construction is crucial for guiding the initial design, construction, and subsequent operation of underground structures.

[0003] Currently, when studying the impact of underground structures on groundwater barrier, it is necessary to collect multi-dimensional parameters such as groundwater level, water pressure, and flow path to assess the seepage characteristics and variation patterns of groundwater. However, it is difficult to collect these data in practice, thus making it impossible to know the barrier effect of underground structures on groundwater. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, this application provides an experimental device for exploring the influence of underground structures on groundwater obstruction. The device measures the seepage characteristics and changing trends of groundwater around the underground structure through experiments, so as to explore the influence of underground structures on groundwater obstruction in the laboratory stage and provide a theoretical basis for the early design, construction and later operation of underground engineering projects.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this application provides an experimental apparatus for investigating the influence of underground structures on groundwater obstruction, the specific technical solution of which is as follows:

[0008] An experimental apparatus for investigating the effect of underground structures on groundwater curtain obstruction, comprising:

[0009] The box has an opening at the top and contains a first chamber, a second chamber, and a third chamber that are interconnected.

[0010] The first chamber is used to connect to the water supply system, which is used to continuously add liquid to the first chamber.

[0011] The second chamber contains soil, and the third chamber has drainage outlets on its walls.

[0012] The simulated building is embedded in the soil within the second chamber;

[0013] Multiple pressure monitoring devices are buried in the soil and evenly spaced around the simulated building. The pressure monitoring devices are used to detect the liquid pressure information at their location in real time.

[0014] The controller is electrically connected to multiple monitoring devices to receive and store liquid pressure information monitored by the multiple pressure monitoring devices.

[0015] Furthermore, the test apparatus also includes an overflow device, which includes:

[0016] An overflow assembly is mounted on the wall of the first chamber via a height adjustment assembly and can be selectively connected to or closed to the interior of the first chamber;

[0017] The height adjustment assembly is used to adjust the height of the overflow assembly relative to the bottom of the first chamber.

[0018] Furthermore, the height adjustment component includes:

[0019] The first sliding part is provided on the cavity wall of the first chamber and extends along the height direction of the first chamber;

[0020] The second sliding part is slidably connected to the first sliding part, and the overflow component is disposed on the second sliding part.

[0021] Furthermore, the overflow component includes:

[0022] An overflow pipe is provided on the second sliding part, which is sealed to the cavity wall of the first chamber to form a closed space between the second sliding part and the cavity wall of the first chamber.

[0023] An overflow hole is provided on the cavity wall of the first chamber to connect the sealed space with the cavity of the first chamber.

[0024] The overflow pipe is also equipped with a manual valve, which can be turned to control the connection or closure of the overflow pipe with the enclosed space.

[0025] Preferably, a sealing assembly is provided on the side of the second sliding part near the cavity wall of the first chamber;

[0026] A tightening device is provided on the first sliding part. The end of the tightening device near the first chamber abuts against the second sliding part. Tightening the tightening device can compress the sealing component provided on the second sliding part to achieve a sealed connection between the second sliding part and the cavity wall of the first chamber.

[0027] Preferably, the first sliding part includes two parallel sliding tracks that extend along the height direction of the first chamber;

[0028] The slide has an L-shaped cross-section, with the side closest to the first chamber perpendicular to the wall of the first chamber and the side furthest from the first chamber parallel to the wall of the first chamber.

[0029] The second sliding part is plate-shaped and connects the two slides to the first chamber.

[0030] Preferably, the simulated building is an L-shaped plate, which is rotated 45º so that its 90º angle is directly opposite the first chamber.

[0031] Furthermore, the soil includes:

[0032] The aquifer is composed of sand and gravel.

[0033] The impermeable layer, located below the permeable layer, is made of mudstone.

[0034] In this case, the side of the L-shaped slab of the simulated building furthest from the opening is at least partially placed in a waterproof layer.

[0035] Preferably, two partitions are arranged in parallel inside the box, dividing the box into a first chamber, a second chamber, and a third chamber.

[0036] The two partitions are each provided with a number of connecting holes, which are arranged in a linear array.

[0037] Furthermore, the test apparatus also includes a level gauge, which is installed on the wall of the second chamber to detect the liquid level information in the second chamber.

[0038] (III) Beneficial Effects

[0039] The experimental apparatus provided in this application for investigating the impact of underground structures on groundwater obstruction fills a gap in the existing technology.

[0040] This application provides an experimental apparatus for investigating the impact of underground structures on groundwater seepage. The apparatus consists of a box divided into three interconnected chambers: a first chamber, a second chamber, and a third chamber. The second chamber contains soil, within which a simulated structure is embedded. Multiple pressure monitoring devices are spaced evenly around the simulated structure. The third chamber has a drain outlet on its wall. The first chamber is connected to a water supply system that continuously injects liquid into it. The liquid flows from the first chamber into the second chamber, through the soil, into the third chamber, and finally exits through the drain outlet, simulating real groundwater seepage.

[0041] As the liquid flows around the simulated building, multiple pressure monitoring devices collect real-time liquid pressure information at their locations and send it to a controller. The controller stores this information for later review by researchers. Researchers can then analyze the changes in liquid pressure after it flows through the simulated building based on the stored information. This allows them to explore the impact of underground structures on groundwater barrier in the laboratory stage, providing a theoretical basis for the early design, construction, and later operation of underground engineering projects. Attached Figure Description

[0042] The accompanying drawings, which are provided to further illustrate this application, constitute a part of this application.

[0043] The illustrative embodiments and descriptions in this application are used to explain this application and do not constitute a limitation thereof.

[0044] Inappropriate limitations are shown in the attached diagram:

[0045] Figure 1 This is a schematic diagram of the experimental device used in a specific implementation to investigate the effect of underground structures on groundwater shielding.

[0046] Figure 2 This is a front view of the experimental setup used in a specific implementation to investigate the impact of underground structures on groundwater shielding.

[0047] Figure 3 The left view of the experimental apparatus used in a specific implementation method to investigate the effect of underground structures on groundwater shielding;

[0048] Figure 4 This is a layout diagram of the simulated building and pressure monitoring device in the experimental setup used to investigate the effect of underground structures on groundwater curtain obstruction in a specific implementation method.

[0049] Figure 5 for Figure 3 Sectional view of AA.

[0050] [Explanation of Labels in the Attached Image]

[0051] 1. First chamber; 2. Second chamber; 3. Third chamber;

[0052] 4. Overflow device;

[0053] 410. Overflow assembly; 411. Overflow pipe; 412. Overflow orifice;

[0054] 420. Height adjustment assembly; 421. First sliding part; 422. Second sliding part; 423. Sealing assembly; 424. Tightening device;

[0055] 5. Drain pipe; 6. Hand valve; 7. Level gauge; 8. Simulated building; 9. Pressure monitoring device; 10. Waterproof layer; 11. Aquifer. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings of the preferred embodiments. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some embodiments of this application, but not all embodiments. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings. In the description of this embodiment, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this embodiment.

[0057] This application addresses the aforementioned problems existing in the prior art, such as Figures 1 to 5 As shown, a method is provided.

[0058] An experimental setup for investigating the effect of underground structures on groundwater curtain obstruction.

[0059] See Figures 1 to 4 The test apparatus includes a chamber, a simulated building 8, multiple pressure monitoring devices 9, and a controller.

[0060] Among them, see Figure 1 The enclosure has an opening at the top and contains a first chamber 1, a second chamber 2, and a third chamber 3, which are interconnected. The second chamber 2 contains soil, the first chamber 1 is connected to the water supply system, and the third chamber 3 has a drain outlet on its wall. The simulated building 8 and multiple pressure monitoring devices 9 are buried in the soil. The pressure monitoring devices 9 are evenly spaced around the simulated building 8 and electrically connected to the controller.

[0061] In this embodiment, liquid is continuously added to the first chamber 1 through a water supply system. Since the first chamber 1, the second chamber 2 and the third chamber 3 are interconnected, the liquid in the first chamber 1 can flow into the second chamber 2, and then through the soil into the third chamber 3, and finally flow out through the drain outlet to simulate the real groundwater seepage situation.

[0062] During the flow of the liquid, multiple pressure monitoring devices 9 collect real-time liquid pressure information at its location and send this information to the controller. The controller receives and stores the liquid pressure information. Researchers can analyze the liquid change patterns based on the liquid pressure information stored in the controller to explore the impact of underground structures on groundwater obstruction in the laboratory stage, providing a theoretical basis for the early design, construction, and later operation of underground engineering projects.

[0063] Here, the controller can be a computer, tablet, or mobile terminal or other device with storage and interactive functions. The pressure monitoring device 9 and the controller transmit information through wired networks, wireless networks, Bluetooth, or USB. The liquid pressure information stored in the controller can be viewed by scientific and technical personnel at any time, which is convenient and fast.

[0064] In an optional embodiment, two partitions are arranged in parallel inside the box, dividing the box into a first chamber 1, a second chamber 2, and a third chamber 3. Each partition has multiple connecting holes arranged in a linear array, allowing for communication between the first chamber 1, the second chamber 2, and the third chamber 3.

[0065] In this embodiment, the linearly arranged connecting holes form a sieve-like structure, allowing the liquid between the first chamber 1 and the second chamber 2, and between the second chamber 2 and the third chamber 3, to flow without resistance, without affecting the seepage effect of the liquid, and more closely resembling the actual seepage situation of groundwater.

[0066] Here, the box is made of transparent acrylic sheets bonded together. The transparent box makes it easy for scientific and technical personnel to set up the simulated building 8 and pressure monitoring device 9, and allows for direct and clear observation of experimental phenomena during the experiment.

[0067] In some possible embodiments, the test apparatus further includes an overflow device 4 for adjusting the liquid level in the first chamber 1.

[0068] The overflow device 4 includes an overflow assembly 410, which can be selectively connected to or closed to the interior of the first chamber 1. The overflow assembly 410 is mounted on the wall of the first chamber 1 via a height adjustment assembly 420, which is used to adjust the height of the overflow assembly 410 relative to the bottom of the first chamber 1.

[0069] In a specific experiment, the overflow component 410 is adjusted to a preset height by the height adjustment component 420, and then the overflow component 410 is connected to the first chamber 1. When the liquid in the first chamber 1 reaches the preset height, the excess liquid will flow out from the overflow component 410 to maintain the water level of the liquid in the first chamber 1 at a constant preset height value.

[0070] Here, in this embodiment, the overflow component 410 is used to adjust the liquid water level in the first chamber 1 to simulate groundwater at different water levels, so as to explore the blocking effect of underground structures on groundwater at different water levels.

[0071] In some possible implementations, see [link to relevant documentation]. Figure 5 The height adjustment component 420 includes a first sliding portion 421 and a second sliding portion 422. The first sliding portion 421 is disposed on the cavity wall of the first chamber 1 and extends along the height direction of the first chamber 1. The second sliding portion 422 is slidably connected to the first sliding portion 421 and connected to the overflow component 410. The second sliding portion 422 drives the overflow component 410 to slide along the first sliding portion 421, thereby bringing the overflow component 410 to a preset height.

[0072] In some possible embodiments, the overflow assembly 410 includes an overflow pipe 411 and an overflow orifice 412. The overflow pipe 411 is disposed on a second sliding portion 422, which is sealed to the wall of the first chamber 1 to form a closed space between the second sliding portion 422 and the wall of the first chamber 1. The overflow orifice 412 is disposed on the wall of the first chamber 1 and is an elongated hole extending along the height direction of the first chamber 1, connecting the closed space to the inner cavity of the first chamber 1. A hand valve 6 is also provided on the overflow pipe 411, which can be turned to control the connection and closure of the overflow pipe 411 and the closed space.

[0073] During liquid level adjustment, the overflow assembly 410 is moved along the first sliding part 421 to a preset height via the second sliding part 422, and then the hand valve 6 is turned to connect the overflow pipe 411 to the sealed space. When the liquid level in the first chamber 1 reaches the preset height, the liquid in the first chamber 1 and the sealed space will be discharged through the overflow pipe 411, and the liquid level in the first chamber 1 will remain constant at the preset height, thereby achieving liquid level adjustment in the first chamber 1 to simulate groundwater seepage at different water levels.

[0074] In some possible embodiments, a sealing component 423 is provided on the side of the second sliding portion 422 near the first chamber 1. A tightening device 424 is correspondingly provided on the first sliding portion 421. The end of the tightening device 424 near the first chamber 1 abuts against the second sliding portion 422. Tightening the tightening device 424 can push the second sliding portion 422 to move closer to the first chamber 1, compressing the sealing component 423, and achieving a sealed connection between the second sliding portion 422 and the cavity wall of the first chamber 1.

[0075] In an optional embodiment, see Figure 3 The first sliding part 421 includes two sliding rods arranged in parallel.

[0076] The slide has an L-shaped cross-section. The side of the L-shaped slide closest to the first chamber 1 is connected to the first chamber 1.

[0077] The cavity wall is perpendicular to the first chamber 1, and the side away from the first chamber 1 is parallel to the cavity wall of the first chamber 1.

[0078] The second sliding part 422 is plate-shaped and is positioned between the two slide rails and the first chamber 1. The sealing assembly 423 includes a sealing groove and a sealing ring. The sealing groove is located on the end face of the second sliding part 422 near the first chamber 1, and the sealing ring is placed inside the sealing groove.

[0079] Here, the two ends of the two slides are connected by semi-circular slides to form an elliptical first sliding part 421. Correspondingly, the second sliding part 422 is also elliptical. The outer dimensions of the second sliding part 422 are smaller than those of the first sliding part 421. The second sliding part 422 can slide within the space between the first sliding part 421 and the wall of the first chamber 1. The semi-circular slides limit the range of movement of the second sliding part 422.

[0080] The tightening device 424 is a screw, and there are multiple screws, which are evenly distributed on two parallel slides. The end of the screw near the first chamber 1 abuts against the second sliding part 422. Tightening the screw can push the second sliding part 422 to compress the sealing ring, so as to achieve a sealed connection between the second sliding part 422 and the first chamber 1.

[0081] In some possible implementations, see [link to relevant documentation]. Figure 3 The first sliding part 421 has a scale line on one of its slides, and the second sliding part 422 has an arrow at the location of the overflow pipe 411. When adjusting the height of the overflow assembly 410, the adjustment arrow is aligned with the scale line at the preset height, which is convenient and quick.

[0082] In some possible implementations, see [link to relevant documentation]. Figure 2A drain pipe 5 is installed at the drain outlet of the third chamber 3, and a hand valve 6 is also installed on the drain pipe 5. The discharge of liquid in the third chamber 3 is controlled by turning the hand valve 6.

[0083] Here, the hand valve 6 on the drain pipe 5 and the overflow pipe has the same structure, which is an existing structure. Therefore, this embodiment does not specifically limit its structure.

[0084] In some possible implementations, see [link to relevant documentation]. Figure 4 The simulated building 8 is an L-shaped slab, rotated 45º and positioned so that its 90º angle faces the first chamber 1. In this embodiment, the simulated state of groundwater seepage is that the liquid flows laterally from the first chamber 1 to the second chamber 2, while actual groundwater seepage flows from the surface towards the drainage system, such as rivers and lakes, with an overall downward trend. Therefore, the L-shaped slab is rotated 45º to simulate the actual seepage state of groundwater.

[0085] It should be noted that the simulated building 8 in this embodiment uses an L-shaped slab to simulate an L-shaped ultra-deep foundation pit in the Chengdu Metro. Due to the characteristics of this foundation pit, such as its large burial depth and special structure, it can be used to explore the geological environmental impact that may be caused by the development of deep underground space.

[0086] In some possible implementations, see [link to relevant documentation]. Figure 4 The soil in the second chamber 2 also simulates the real geological environment. The soil specifically includes an aquifer 11 and an impermeable layer 10. The aquifer 11 is made of sand and gravel, and the impermeable layer is located below the aquifer 11 and is made of mud and gravel.

[0087] Here, the side of the L-shaped slab of the simulated building 8 away from the opening is at least partially placed in the aquifer 10 so that the simulated building 8 completely cuts off the aquifer 11, which is consistent with an "L"-shaped ultra-deep foundation pit of the Chengdu Metro, in order to explore the geological environmental impact that deep underground space development may cause.

[0088] Furthermore, in some possible implementations, see [link to relevant documentation]. Figure 1 and Figure 2 The experimental device also includes a level gauge 7, which is installed on the wall of the second chamber 2 to detect the liquid level information in the second chamber 2. Researchers can combine the liquid level information and liquid pressure information to comprehensively explore the barrier effect of underground structures on groundwater.

[0089] The above describes the specific structure of the experimental apparatus used in this embodiment to investigate the effect of underground structures on groundwater obstruction. Researchers can use this apparatus to investigate the effect of underground structures on groundwater obstruction in the laboratory setting. The specific experimental process is as follows:

[0090] (1) Adjust the overflow component 410 to the preset height;

[0091] (2) Close the hand valve 6 on the drain pipe 5 and the overflow pipe, and add liquid to the first chamber 1 through the water supply system until the liquid level in all chambers reaches the first preset position.

[0092] (3) Add mudstone layer by layer to the second chamber 2 until it is above the liquid surface. Use a compaction hammer to gently tap the mudstone layer and check its density until the preset density is reached.

[0093] (4) Place the simulated building 8 at the specified depth;

[0094] (5) Add mudstone to the second chamber 2 again until the height of the mudstone layer in the second chamber 2 reaches the second preset position to complete the laying of the waterproof layer 10.

[0095] (6) Install pressure monitoring devices 9 around the simulated building 8;

[0096] (7) Lay a water-bearing layer 11 on the top of the water-proof layer 10 with sand and gravel until the soil height reaches the third preset position;

[0097] (8) Add liquid to the first chamber 1 again until the liquid fills the box and let it stand for 24 hours until it is saturated;

[0098] (9) Continuously add liquid to the first chamber 1 through the water supply system, and open the hand valves 6 on the drain pipe 5 and the overflow pipe respectively;

[0099] (10) Obtain the liquid pressure information detected by the pressure monitoring device 9 and the water level information in the second chamber 2 detected by the level gauge 7, and store them accordingly.

[0100] It should be noted that the preset height, first preset position, second preset position, third preset position, and preset density parameters in this embodiment are related to the test conditions. Different test conditions will result in different parameters. However, the test apparatus in this embodiment is a general-purpose test apparatus that can conduct relevant tests based on different test conditions; therefore, this embodiment does not specifically limit the above parameters.

[0101] Based on the above steps, researchers can finally plot pressure and water level change curves based on the obtained liquid pressure and water level information, analyze their change patterns, determine the curtain barrier effect of underground structures on groundwater seepage, reveal the curtain barrier effect of underground engineering on the seepage field and its change patterns, thereby achieving reasonable optimization of underground engineering structure design, reducing its disturbance to the groundwater environment, and providing a basis for the potential geological environment risks induced by engineering disturbances.

[0102] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and application concept of this application, are covered within the scope of protection of this application.

Claims

1. An experimental apparatus for investigating the influence of a subterranean structure on the barrier effect of a groundwater curtain, characterized in that, include: The box has an opening at the top and contains a first chamber, a second chamber, and a third chamber that are interconnected. The first chamber is used to connect to a water supply system, which is used to continuously add liquid into the first chamber. The second chamber contains soil, and the third chamber has a drainage outlet on its wall; A simulated building is embedded in the soil within the second chamber; Multiple pressure monitoring devices are buried in the soil and are evenly spaced around the simulated building. The pressure monitoring devices are used to detect the liquid pressure information at their location in real time. The controller is electrically connected to multiple pressure monitoring devices and is used to receive and store the liquid pressure information monitored by the multiple pressure monitoring devices.

2. The test apparatus for investigating the influence of a building on a groundwater curtain according to claim 1, characterized in that The test apparatus further includes an overflow device, which comprises: An overflow assembly is mounted on the wall of the first chamber via a height adjustment assembly and can be selectively connected to or closed to the interior of the first chamber; The height adjustment component is used to adjust the height of the overflow component relative to the bottom of the first chamber.

3. The test apparatus for investigating the impact of underground structures on groundwater curtain barriers according to claim 2, characterized in that The height adjustment component includes: The first sliding part is disposed on the cavity wall of the first chamber and extends along the height direction of the first chamber; The second sliding part is slidably connected to the first sliding part, and the overflow component is disposed on the second sliding part.

4. The test apparatus of claim 3, wherein, The overflow component includes: An overflow pipe is provided on the second sliding part, which is sealed to the cavity wall of the first chamber to form a sealed space between the second sliding part and the cavity wall of the first chamber. An overflow hole is provided on the cavity wall of the first chamber. It is an elongated hole extending along the height direction of the first chamber and is used to connect the sealed space with the cavity of the first chamber. The overflow pipe is also equipped with a hand valve, which can be turned to control the connection and closure of the overflow pipe and the sealed space.

5. The experimental apparatus for investigating the influence of underground structures on groundwater obstruction according to claim 4, characterized in that, A sealing assembly is provided on the side of the second sliding part near the cavity wall of the first chamber; A tightening device is provided on the first sliding part. The end of the tightening device near the first chamber abuts against the second sliding part. Tightening the tightening device can compress the sealing component provided on the second sliding part to achieve a sealed connection between the second sliding part and the cavity wall of the first chamber.

6. The experimental apparatus for investigating the influence of underground structures on groundwater obstruction according to claim 5, characterized in that, The first sliding part includes two parallel slide rails, which extend along the height direction of the first chamber. The slide has an L-shaped cross-section, with the side closest to the first chamber perpendicular to the wall of the first chamber and the side furthest from the first chamber parallel to the wall of the first chamber. The second sliding part is plate-shaped and is connected between the two slides and the first chamber.

7. The test apparatus of claim 1, wherein, The simulated building is an L-shaped plate, which is rotated 45°, with its 90° angle facing the first chamber.

8. The test apparatus of claim 7, wherein, The soil includes: The aquifer is composed of sand and gravel. The impermeable layer, located below the aquifer, is made of mudstone. In this case, at least part of the side of the L-shaped panel of the simulated building away from the opening is placed in the waterproof layer.

9. The test apparatus of claim 1, wherein, Two partitions are arranged in parallel inside the box, dividing the box into the first chamber, the second chamber, and the third chamber. Each of the two partitions is provided with a connecting hole, and the number of the connecting holes is multiple, and the multiple connecting holes are arranged in a linear array.

10. The test apparatus of claim 1, wherein, The test apparatus also includes a level gauge, which is installed on the wall of the second chamber and is used to detect the liquid level information of the liquid in the second chamber.

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