A seepage drainage model test device and test method under active anti-floating measures

Abstract

The present invention discloses a seepage drainage model test device and test method under active anti-floating measures, which belongs to the field of active anti-floating technology for buildings, and aims to solve the technical problem that the change law of groundwater seepage field and drainage volume under different conditions is unclear when buildings adopt active anti-floating measures in the prior art. It includes: a boundary model box and a building model box connected to the boundary model box; a cavity is formed in the boundary model box, and the cavity is used to fill and lay a simulated soil layer structure; the building model box is arranged above the simulated soil layer structure; a plurality of pore pressure sensors are buried in the simulated soil layer structure; a plurality of pressure-limiting drainage pipes are arranged on the building model box, and the height between the end of the pressure-limiting drainage pipe and the building model box is adjustable; and a plurality of pressure-limiting drainage pipes are used to simulate the active anti-floating structure in the actual building. The present invention is suitable for the research on the application of active anti-floating measures in foundation pit engineering, and provides guidance for the application of active anti-floating measures in actual engineering.

Description

Technical Field

[0001] The invention relates to the technical field of active anti-floating technology for buildings, and in particular to a seepage drainage model test device and a test method under active anti-floating measures. Background Art

[0002] In recent years, with the construction of a large number of high-rise buildings with basements, underground garages, sunken squares, subways, underground shopping malls and other underground structures, the underground space has been rapidly expanding in breadth and depth, which has led to a sharp increase in the water load borne by the underground structures, posing serious challenges to the anti-floating design of underground structures.

[0003] At present, the anti-floating methods of underground space are mainly divided into two categories: active anti-floating and passive anti-floating. Among them, passive anti-floating mainly includes counterweight anti-floating, anti-floating anchor rods, and anti-floating piles. Active anti-floating mainly includes drainage and pressure relief, pressure-limited drainage method, and a combination of pressure-limited and interception methods.

[0004] Compared with passive anti-floating, active anti-floating has the advantages of saving cost, saving construction time, simple construction, and saving resources. However, there are also some problems as follows: First, the applicability of active anti-floating in various stratum combinations, especially in the case of local permeable strata below the base, is still unclear. Second, the subsequent long-term drainage estimation of active anti-floating is still inaccurate. Third, the changing laws of seepage field and drainage under different rainfall intensities and durations are still unclear.

[0005] In view of this, there is an urgent need for a drainage simulation device that can simulate active anti-floating measures under different rainfall and formation conditions, which can make the abstract soil seepage more intuitive and provide scientific reference data for the application of active anti-floating measures in actual engineering. Summary of the invention

[0006] The purpose of the present invention is to provide a seepage drainage model test device and test method under active anti-floating measures to solve the technical problem in the prior art that the changing laws of groundwater seepage field and drainage volume under different conditions when buildings adopt active anti-floating measures are unclear.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] The present invention provides a seepage drainage model test device under active anti-floating measures, comprising: a boundary model box and a building model box connected to the boundary model box;

[0009] A cavity is formed in the boundary model box, and the cavity is used to fill and lay a simulated soil layer structure; the building model box is arranged above the simulated soil layer structure; a plurality of pore pressure sensors are buried in the simulated soil layer structure;

[0010] The building model box is provided with a plurality of pressure-limiting drainage pipes, and the height between the ends of the pressure-limiting drainage pipes and the building model box is adjustable; the plurality of pressure-limiting drainage pipes are used to simulate active anti-floating structures in actual buildings.

[0011] Optionally or preferably, a rainfall simulation component and a water circulation component are respectively provided on the boundary model box;

[0012] The rainfall simulation component includes a rainfall plate, a second water collection tank and a bracket; the rainfall plate is fixed to the boundary model box through the bracket and acts on the simulated soil layer structure;

[0013] The rain plate is connected to the second water collecting tank through a fourth pipe, and a second flow meter and a second water pump are respectively provided on the fourth pipe.

[0014] Optionally or preferably, the water circulation assembly includes a water head control structure and a No. 1 water collecting tank;

[0015] The water head control structure is connected to the first water collecting tank through a second pipe, and a third flow meter is provided on the second pipe;

[0016] The water head control structure is fixed to the upper outer edge of the boundary model box, and is used to collect the overflowed water in the boundary model box, and collect it in the first water collecting tank through the second pipe;

[0017] The No. 1 water collecting tank is connected to the No. 2 water collecting tank through a third pipeline; and a first water pump is arranged on the third pipeline.

[0018] Optionally or preferably, a plurality of first pipes are provided at the bottom of the building model box, and the first pipes are used to simulate the pressure relief well structure in an actual building;

[0019] One end of the first pipe away from the building model box is connected to a No. 3 water collecting tank; the first pipe is used to collect water from the plurality of the pressure-limiting drainage pipes and collect the water in the No. 3 water collecting tank;

[0020] The first pipeline is provided with a first flow meter.

[0021] Optionally or preferably, the support is a retractable support;

[0022] The bottom of the pressure-limiting drainage pipe is in a hollow hemispherical shape.

[0023] A seepage drainage model test method under active anti-floating measures conditions includes the following steps:

[0024] S1. Install the test device, fill the simulated soil structure, and bury the sensor;

[0025] S2. By controlling variables, the groundwater seepage law of buildings with active anti-floating measures under different conditions is obtained;

[0026] S3. Complete the test, disassemble the test device and record the data.

[0027] Optionally or preferably, the method for installing the test device in S1 comprises the following steps:

[0028] S11, installing the building model box and fixing the building model box and the boundary model box with a plurality of bolts;

[0029] S12, installing a plurality of pressure-limiting drainage pipes in the building model box, and adjusting the ends of the plurality of pressure-limiting drainage pipes to be at the same height as the bottom surface of the building model box;

[0030] S13, installing a rainfall simulation component, and adjusting the height of the rainfall plate through a bracket so that the simulated rainfall from the rainfall plate (4) can cover the surface of the simulated soil structure;

[0031] S14, start the water circulation component, and collect flow data from the first flow meter, the second flow meter and the third flow meter respectively.

[0032] Optionally or preferably, the method for filling the simulated soil layer structure in S1 is: laying the soil layers in layers, and after laying each soil layer, using a ring knife to cut and sample, and performing a permeability test on the sampled pattern to ensure that the properties of the piled soil are the same as the properties of the preset soil layers.

[0033] Optionally or preferably, the method of obtaining the groundwater seepage law of a building under different conditions by controlling variables using active anti-floating measures in S2 comprises the following steps:

[0034] S21, controlling the simulated soil layer structure, the first pipeline layout mode and the leakage height of the pressure-limiting drainage pipe end to remain unchanged, changing the rainfall conditions, and obtaining the groundwater seepage law under different rainfall conditions by using the pore pressure sensor and the flow data of multiple flow meters;

[0035] S22, keeping the rainfall conditions, the first pipeline layout mode and the leakage height of the pressure-limiting drainage pipe end unchanged, changing the simulated soil layer structure, and analyzing the influence of different soil layer structures on the drainage volume of the pressure-limiting drainage pipe and the pore pressure sensor through the flow data of the pore pressure sensor and multiple flow meters, and then obtaining the groundwater seepage law under different soil layer structure conditions using active anti-floating measures;

[0036] S23, controlling rainfall conditions, simulating soil layer structure and keeping the leakage height of the pressure-limiting drainage pipe end unchanged, changing the spacing or plane layout of the first pipeline, and analyzing the influence of the layout of the pressure relief well on the drainage volume of the pressure-limiting drainage pipe and the pore pressure sensor through the flow data of the pore pressure sensor and multiple flow meters, and then obtaining the groundwater seepage law under different drainage well layout conditions using active anti-floating measures;

[0037] S24. Control the rainfall conditions, simulate the soil layer structure and keep the layout of the first pipeline unchanged, change the leakage height of the end of the pressure-limiting drainage pipe, and use the pore pressure sensor and the flow data of multiple flow meters to analyze the impact of different pressure limit values ​​on the drainage volume of the pressure-limiting drainage pipe and the pore pressure sensor, and then obtain the groundwater seepage law under different pressure limit conditions using active anti-floating measures.

[0038] Optionally or preferably, the rainfall condition in S21 includes rainfall amount and rainfall time, wherein the simulation method of rainfall time is:

[0039] In a homogeneous isotropic medium, the cross-sectional one-dimensional confined water flow equations are:

[0040]

[0041]

[0042] in, K is the permeability coefficient, H For water head, S s is the water storage rate, v is the flow rate, t For time, x is the horizontal coordinate;

[0043] Introducing a set of dimensionless ratios α H , α S , α K , α x , α t , α v :

[0044]

[0045]

[0046]

[0047]

[0048]

[0049]

[0050] in K m , H m , S s,m , v m , x m , t m is the model quantity, K , H , S s , v, x, t The prototype quantity;

[0051] After sorting, we get:

[0052]

[0053]

[0054] Let the combination of ratios satisfy the following formula:

[0055]

[0056]

[0057] By selecting different ratios, the groundwater seepage law under different rainfall durations can be simulated.

[0058] Based on the above technical solution, the present invention can at least produce the following technical effects:

[0059] The seepage drainage model test device and test under active anti-floating measures provided by the present invention can demonstrate the drainage situation and groundwater seepage law of soil under different conditions using active anti-floating measures; the test method can analyze the effects of rainfall and soil structure factors on groundwater seepage law under active anti-floating measures by respectively changing rainfall conditions, simulating soil layer structure, the layout of the first pipeline and the leakage height of the end of the pressure-limiting drainage pipe, combining the flow data of the pore pressure sensor and multiple flow meters. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 It is a schematic diagram of the overall structure of the seepage drainage model test device under the active anti-floating measures of the present invention;

[0061] Figure 2It is a front view of the seepage drainage model test device under the active anti-floating measures of the present invention;

[0062] Figure 3 It is a top view of the seepage drainage model test device under the active anti-floating measures of the present invention;

[0063] Figure 4 It is a side view of the seepage drainage model test device under the active anti-floating measures of the present invention;

[0064] Figure 5 It is a front cross-sectional view of the seepage drainage model test device under the active anti-floating measures of the present invention;

[0065] Figure 6 It is a cross-sectional schematic diagram of the seepage drainage model test device under the active anti-floating measures of the present invention under certain formation conditions;

[0066] Figure 7 It is a flow chart of the seepage drainage model test method under the active anti-floating measures condition of the present invention.

[0067] In the figure: 1. Building model box; 2. Boundary model box; 3. Head control structure; 4. Rain plate; 5. Pressure limiting drain pipe; 6. Bolt; 7. First pipeline; 8. Second pipeline; 9. Third pipeline; 10. Fourth pipeline; 11. First flow meter; 12. Second flow meter; 13. Third flow meter; 14. First water pump; 15. Second water pump; 16. No. 1 water collecting tank; 17. No. 2 water collecting tank; 18. No. 3 water collecting tank; 19. Bracket. DETAILED DESCRIPTION

[0068] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work belong to the scope of protection of the present invention.

[0069] Embodiment 1

[0070] See also Figures 1 to 6 A seepage drainage model test device under active anti-floating measures comprises a boundary model box 2 and a building model box 1 fixedly connected to the boundary model box 2 by bolts 6.

[0071] In this embodiment, an L-shaped cavity is formed in the boundary model box 2, and the cavity is used to fill and lay the simulated soil layer structure (such as Figure 6The simulated soil layer structure includes soil layer 1, soil layer 2 and soil layer 3), and a plurality of pore pressure sensors are arranged in the simulated soil layer structure; the above-mentioned building model box 1 is arranged above the simulated soil layer structure, and the building model box 1 is arranged close to one side of the boundary model box 2, so that the simulated soil layer structure on the other side can be exposed to the outside, which is convenient for the rainfall simulation component to implement simulated rainfall.

[0072] In this embodiment, a plurality of pressure-limiting drain pipes 5 are arranged on the bottom end face of the building model box 1. To facilitate subsequent experiments, the height between the ends of the plurality of pressure-limiting drain pipes 5 and the bottom face of the building model box 1 is adjustable. The plurality of pressure-limiting drain pipes 5 are used to simulate the active anti-floating structure in an actual building.

[0073] The test device provided in this embodiment also includes a rainfall simulation component and a water circulation component.

[0074] Specifically, the rainfall component includes a rainfall plate 4, a No. 2 water collecting tank 17 and a bracket 19 with a telescopic function; the rainfall plate 4 is connected to the No. 2 water collecting tank 17 through a fourth pipe 10, and a second flow meter 12 and a second water pump 15 are respectively provided on the fourth pipe 10; wherein the rainfall plate 4 is fixed to the boundary model box 2 through the bracket 19, and a plurality of nozzles are evenly distributed on the rainfall plate 4, and the second water pump 15 can pump the water in the No. 2 water collecting tank 17 to the rainfall plate 4, thereby acting on the simulated soil layer structure to complete the simulated rainfall; the second flow meter 12 is used to monitor the rainfall amount.

[0075] The above-mentioned water circulation component includes a head control structure 3 and a No. 1 water collecting tank 16; the head control structure 3 is connected to the No. 1 water collecting tank 16 through a second pipe 8, and a third flow meter 13 is arranged on the second pipe 8; the head control structure 3 is fixed to the upper outer edge of the boundary model box 2, and is used to collect water overflowing from the boundary model box 2, and collect it in the No. 1 water collecting tank 16 through the second pipe 8; the No. 1 water collecting tank 16 is connected to the No. 2 water collecting tank 17 through a third pipe 9; a first water pump 14 is arranged on the third pipe 9; wherein the third flow meter 13 can monitor the amount of water discharged by the head control structure 3.

[0076] In this embodiment, a plurality of first pipes 7 are arranged at the bottom of the building model box 1. The first pipes 7 serve as drainage pipes and can simulate the pressure relief well structure in an actual building. One end of the first pipe 7 away from the building model box 1 is connected to a No. 3 water collecting tank 18. The first pipe 7 is used to collect water from a plurality of pressure-limiting drainage pipes 5 and collect the water in the No. 3 water collecting tank 18. A first flow meter 11 is arranged on the first pipe 7, and the first flow meter 11 is used to monitor the amount of water discharged from the pressure-limiting drainage pipe 5.

[0077] Embodiment 2

[0078] See also Figure 7This embodiment conducts a groundwater seepage test based on the seepage drainage model test device under the active anti-floating measures provided in the first embodiment, including the following steps:

[0079] S1. Install the test device, fill the simulated soil structure, and bury the sensor;

[0080] The method for installing the test device in S1 comprises the following steps:

[0081] S11, installing the building model box 1 and fixing the building model box 1 and the boundary model box 2 with a plurality of bolts 6;

[0082] S12, installing a plurality of pressure-limiting drainage pipes 5 in the building model box 1, and adjusting the ends of the plurality of pressure-limiting drainage pipes 5 to be consistent in height with the bottom surface of the building model box 1;

[0083] S13, installing the rainfall simulation component, and adjusting the height of the rainfall plate 4 through the bracket 19 so that the simulated rainfall from the rainfall plate 4 can cover the surface of the simulated soil layer structure;

[0084] S14, start the water circulation component, and collect flow data from the first flow meter 11, the second flow meter 12 and the third flow meter 13 respectively.

[0085] The method for filling the simulated soil layer structure in S1 is: laying the soil layers in layers, and after laying each soil layer, cutting and sampling with a ring knife, and conducting a permeability test on the sampled pattern to ensure that the properties of the piled soil are the same as those of the preset soil layers.

[0086] S2. By controlling variables, the groundwater seepage law of buildings with active anti-floating measures under different conditions is obtained;

[0087] In S2, by controlling variables, a method for obtaining the groundwater seepage law of a building under different conditions using active anti-floating measures is provided, including the following steps:

[0088] S21, controlling the simulated soil layer structure, the layout of the first pipeline 7, and the leakage height of the end of the pressure-limiting drainage pipe 5 to remain unchanged, changing the rainfall conditions, and obtaining the groundwater seepage law under different rainfall conditions by using the active anti-floating measures through the flow data of the pore pressure sensor and multiple flow meters (i.e., the first flow meter 11, the second flow meter 12, and the third flow meter 13);

[0089] The rainfall conditions in S21 include rainfall amount and rainfall time, and the simulation method of rainfall time is:

[0090] In a homogeneous isotropic medium, the cross-sectional one-dimensional confined water flow equations are:

[0091]

[0092]

[0093] in, K is the permeability coefficient, H For water head, S s is the water storage rate, v is the flow rate, t For time, x is the horizontal coordinate;

[0094] Introducing a set of dimensionless ratios α H , α S , α K , α x , α t , α v :

[0095]

[0096]

[0097]

[0098]

[0099]

[0100]

[0101] in K m , H m , S s,m , v m , x m , t m is the model quantity, K , H , S s , v, x, t The prototype quantity;

[0102] After sorting, we get:

[0103]

[0104]

[0105] Let the combination of ratios satisfy the following formula:

[0106]

[0107]

[0108] By selecting different ratios, the groundwater seepage law under different rainfall durations can be simulated.

[0109] For example, α K =1, α S =1, α x =1:20, α H =1:20; Substitute it into the above formula and calculate: α t =1:400, α v =1; when the model ratio is determined, the time ratio α t is a fixed number. According to the above example, when simulating 10 days of continuous rainfall, the required test time is: t=10*24*3600 / 400s=2160s=36min.

[0110] When the rainfall is small, all the rainfall will quickly penetrate into the soil, and the soil will be unsaturated. At this time, only the pore pressure sensor in the soil and the drainage data of the first pipeline 7 can be used to study the groundwater seepage law under different rainfall conditions using active anti-floating measures.

[0111] When the rainfall is heavy, the soil gradually enters a saturated state, and the rainfall will be discharged in two ways: infiltration and surface runoff. By collecting the water volume of local runoff, pore pressure sensor data, and the water volume data of the first pipeline 7, the groundwater seepage law under different rainfall conditions can be studied using active anti-floating measures.

[0112] S22, control the rainfall conditions, the layout of the first pipeline 7 and the leakage height of the end of the pressure-limiting drainage pipe 5 to remain unchanged, change the simulated soil layer structure, and analyze the influence of different soil layer structures on the drainage volume of the pressure-limiting drainage pipe 5 and the pore pressure sensor through the flow data of the pore pressure sensor and multiple flow meters, and then obtain the groundwater seepage law under different soil layer structure conditions using active anti-floating measures;

[0113] S23, controlling rainfall conditions, simulating soil layer structure and keeping the leakage height of the end of the pressure-limiting drainage pipe 5 unchanged, changing the spacing or plane layout of the first pipeline 7, and analyzing the influence of the layout of the pressure relief well on the drainage volume of the pressure-limiting drainage pipe 5 and the pore pressure sensor through the flow data of the pore pressure sensor and multiple flow meters, and then obtaining the groundwater seepage law under different drainage well layout conditions using active anti-floating measures;

[0114] S24, control the rainfall conditions, simulate the soil layer structure and the layout of the first pipeline 7 unchanged, change the leakage height of the end of the pressure-limiting drainage pipe 5, and use the pore pressure sensor and the flow data of multiple flow meters to analyze the influence of different pressure limit values ​​on the drainage volume of the pressure-limiting drainage pipe 5 and the pore pressure sensor, and then obtain the groundwater seepage law under different pressure limit values ​​using active anti-floating measures.

[0115] S3. Complete the test, disassemble the test device and record the data.

[0116] In summary, the groundwater seepage conditions of buildings equipped with active anti-floating measures under the coupled influence of various soil layer structures, plane layouts, pressure limit conditions and rainfall conditions can be analyzed. In addition, the drainage conditions of pressure-limited drainage pipes at different spacings and heights can also be obtained.

[0117] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0118] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A seepage drainage model test method under active anti-floating measures, characterized in that: The test is conducted based on a seepage drainage model test device under active anti-floating measures, wherein the seepage drainage model test device under active anti-floating measures comprises: a boundary model box (2) and a building model box (1) connected to the boundary model box (2); A cavity is formed in the boundary model box (2), and the cavity is used to fill and lay a simulated soil layer structure; the building model box (1) is arranged above the simulated soil layer structure; a plurality of pore pressure sensors are buried in the simulated soil layer structure; The building model box (1) is provided with a plurality of pressure-limiting drainage pipes (5), and the height between the end of the pressure-limiting drainage pipe (5) and the building model box (1) is adjustable; the plurality of pressure-limiting drainage pipes (5) are used to simulate active anti-floating structures in actual buildings; The boundary model box (2) is provided with a rainfall simulation component and a water circulation component respectively; The rainfall simulation component comprises a rainfall plate (4), a second water collection tank (17) and a bracket (19); the rainfall plate (4) is fixed to the boundary model box (2) via the bracket (19) and acts on the simulated soil layer structure; The rain plate (4) is connected to the second water collecting tank (17) via a fourth pipe (10), and a second flow meter (12) and a second water pump (15) are respectively provided on the fourth pipe (10); The water circulation assembly comprises a water head control structure (3) and a first water collecting tank (16); The water head control structure (3) is connected to the first water collecting tank (16) via a second pipe (8), and a third flow meter (13) is provided on the second pipe (8); The water head control structure (3) is fixed to the upper outer edge of the boundary model box (2) and is used to collect water overflowing from the boundary model box (2) and collect the water in the first water collecting tank (16) through the second pipe (8); The first water collecting tank (16) is connected to the second water collecting tank (17) via a third pipe (9); a first water pump (14) is provided on the third pipe (9); A plurality of first pipes (7) are arranged at the bottom of the building model box (1), and the first pipes (7) are used to simulate the pressure relief well structure in an actual building; One end of the first pipe (7) away from the building model box (1) is connected to a No. 3 water collecting tank (18); the first pipe (7) is used to collect water from the plurality of pressure-limiting drainage pipes (5) and collect the water in the No. 3 water collecting tank (18); The first pipeline (7) is provided with a first flow meter (11); The bracket (19) is a retractable bracket; the bottom of the pressure-limiting drainage pipe (5) is in the shape of a hollow hemispherical shape; The seepage drainage model test method under active anti-floating measures comprises the following steps: S1. Install the test device, fill the simulated soil structure, and bury the sensor; S2. By controlling variables, the groundwater seepage law of buildings with active anti-floating measures under different conditions is obtained; In S2, by controlling variables, a method for obtaining the groundwater seepage law of a building under different conditions using active anti-floating measures is provided, including the following steps: S21, controlling the simulated soil structure, the layout of the first pipeline (7) and the leakage height of the end of the pressure-limiting drainage pipe (5) to remain unchanged, changing the rainfall conditions, and obtaining the groundwater seepage law under different rainfall conditions by using the pore pressure sensor and the flow data of multiple flow meters; The rainfall conditions in S21 include rainfall amount and rainfall time, and the simulation method of rainfall time is: In a homogeneous isotropic medium, the cross-sectional one-dimensional confined water flow equations are: in, K is the permeability coefficient, H For water head, S s is the water storage rate, v is the flow rate, t For time, x is the horizontal coordinate; Introducing a set of dimensionless ratios α H , α S , α K , α x , α t , α v : in K m , H m , S s,m , v m , x m , t m is the model quantity, K , H , S s , v, x, t The prototype quantity; After sorting, we get: Let the combination of ratios satisfy the following formula: By selecting different ratios, the groundwater seepage law under different rainfall durations can be simulated; S22, controlling the rainfall conditions, the layout of the first pipeline (7), and the leakage height of the end of the pressure-limiting drainage pipe (5) to remain unchanged, changing the simulated soil layer structure, and analyzing the influence of different soil layer structures on the drainage volume of the pressure-limiting drainage pipe (5) and the pore pressure sensor through the flow data of multiple flow meters, thereby obtaining the groundwater seepage law under different soil layer structure conditions using active anti-floating measures; S23, controlling rainfall conditions, simulating soil layer structure and keeping the leakage height of the end of the pressure-limiting drainage pipe (5) unchanged, changing the spacing or plane arrangement of the first pipeline (7), and analyzing the influence of the arrangement of the pressure relief well on the drainage volume of the pressure-limiting drainage pipe (5) and the pore pressure sensor through the flow data of the pore pressure sensor and multiple flow meters, thereby obtaining the groundwater seepage law under different drainage well arrangement conditions using active anti-floating measures; S24, controlling rainfall conditions, simulating soil layer structure and keeping the layout of the first pipe (7) unchanged, changing the leakage height of the end of the pressure-limiting drainage pipe (5), and analyzing the influence of different pressure-limiting values ​​on the drainage volume of the pressure-limiting drainage pipe (5) and the pore pressure sensor through the flow data of multiple flow meters, and then obtaining the groundwater seepage law under different pressure-limiting values ​​using active anti-floating measures; S3. Complete the test, disassemble the test device and record the data.

2. The seepage drainage model test method under active anti-floating measures according to claim 1 is characterized in that: The method for installing the test device in S1 comprises the following steps: S11, installing the building model box (1) and fixing the building model box (1) and the boundary model box (2) together by means of a plurality of bolts (6); S12, installing a plurality of pressure-limiting drainage pipes (5) in the building model box (1), and adjusting the ends of the plurality of pressure-limiting drainage pipes (5) to be at the same height as the bottom surface of the building model box (1); S13, installing a rainfall simulation component, and adjusting the height of the rainfall plate (4) through the bracket (19) so that the simulated rainfall from the rainfall plate (4) can cover the surface of the simulated soil layer structure; S14, start the water circulation component, and collect flow data from the first flow meter (11), the second flow meter (12) and the third flow meter (13) respectively.

3. The seepage drainage model test method under active anti-floating measures according to claim 1 is characterized in that: The method for filling the simulated soil layer structure in S1 is: laying the soil layers in layers, and after laying each soil layer, cutting and sampling with a ring knife, and conducting a permeability test on the sampled pattern to ensure that the properties of the piled soil are the same as those of the preset soil layers.

Images