Composite water-resisting layer inrush experiment device and checking calculation method

Abstract

The invention relates to a composite water-resisting layer inrush experiment device and a checking calculation method, belongs to the field of inrush experiments, and aims to solve the problem that an existing inrush experiment device cannot conveniently and stably feed and replace different types of test soil masses, the composite water-resisting layer inrush experiment device comprises a fixing frame, and a supporting base is fixedly welded to the bottom of the fixing frame; a side plate is fixedly welded to the fixing frame, a top plate is fixedly welded to the top of the side plate, an alternating experiment assembly is installed on the top plate, and a multifunctional monitoring assembly is installed on the top plate. When the inrush experiment is carried out on the composite water-resisting layer in the filling frame on one side, a worker can fill the composite water-resisting layer in the filling frame on the other side, so that after the inrush experiment of the composite water-resisting layer in the filling frame on one side is finished, the inrush experiment of another type of composite water-resisting layer can be carried out immediately, and the operation is repeated, so that the working efficiency is greatly improved. Ceaseless experiment work of the inrush experiment device is achieved, and meanwhile the feeding efficiency of the composite water-resisting layer is improved.

Description

Technical Field

[0001] The present invention relates to a composite water-resisting layer bursting experiment device and a checking calculation method, belonging to the field of bursting experiments. Background Art

[0002] With the rapid development of infrastructure such as urban subway, high-rise buildings, and civil air defense projects in China, the number of deep foundation pit projects is increasing. The geological conditions and environmental impacts during the excavation construction of deep foundation pit projects are very complex. Among them, the bursting failure of soil mass is a common cause of engineering accidents. Therefore, when the thickness of the water-resisting layer is insufficient before excavating to the bottom of the pit, it is necessary to use a composite water-resisting layer for bottom reinforcement. Since the types and ratios of composite water-resisting layers are diverse, in order to obtain the critical water head and critical water-resisting layer thickness of different types of composite water-resisting layers, it is necessary to cooperate with a composite water-resisting layer bursting experiment device to conduct experimental simulations on them.

[0003] However, there are some problems in the existing bursting experiment devices during the actual working process. For example, a test device for simulating the bursting failure phenomenon and law of a confined aquifer with the publication number CN103821183B can adjust the water pressure of the confined aquifer and can monitor the soil mass in real time. However, during the actual working process, it cannot conveniently and stably feed and replace different types of test soil masses. Therefore, after conducting a bursting experiment on one type of soil mass, it is necessary to discharge and replace the test soil mass in the device, and then perform the feeding and filling work of the next type of test soil mass, which consumes a lot of time during the feeding and discharging process. Therefore, when conducting bursting experiments on multiple types of test soil masses, it takes a lot of time and the working efficiency is low; and during the actual working process, it cannot automatically and stably protect, store, and automatically clean the used monitoring components, and the practicability is poor. Therefore, we make improvements on this and propose a composite water-resisting layer bursting experiment device and a checking calculation method. Summary of the Invention

[0004] (1) The technical problem to be solved by the present invention is that the existing bursting experiment device cannot conveniently and stably feed and replace different types of test soil masses, and cannot automatically and stably protect, store, and automatically clean the used monitoring components.

[0005] (2) Technical Solution

[0006] In order to achieve the above-mentioned invention object, the present invention provides a composite water-resisting layer bursting experiment device, which includes a fixing frame. A support base is welded and fixed at the bottom of the fixing frame. Side plates are welded and fixed on the fixing frame. A top plate is welded and fixed on the top of the side plates. An alternating experiment component is installed on the top plate. A multi-functional monitoring component is installed on the top plate. A fixing plate is welded and fixed on the side end face of the side plate. The end of the fixing plate is fixedly connected with a sealing frame. A second card slot is opened at the bottom side end of the sealing frame. A water storage tank is welded and fixed on the top end face of the fixing frame. A fixing pipe is connected to the side end of the water storage tank. A water pump is installed on the top of the water storage tank. A first connecting pipe is flange-connected to the water pump. The bottom of the first connecting pipe is arranged in the water storage tank. The top end of the first connecting pipe is connected to a transfer tank. A partition plate is fixedly connected in the transfer tank. A second connecting pipe is connected to the bottom end of the transfer tank. The other end of the second connecting pipe is connected to one side of the sealing frame. A fourth connecting pipe is connected to the other side of the sealing frame. The bottom end of the fourth connecting pipe is connected to the top of the water storage tank. A third connecting pipe is connected to the top side end of the transfer tank. The bottom end of the third connecting pipe is connected to the top of the water storage tank. A second hydraulic rod is installed and fixed on the side end face of the side plate. The top end of the second hydraulic rod is fixedly connected to the side end face of the transfer tank.

[0007] Among them, the alternating experiment component includes a servo motor. The servo motor is installed and fixed on the top plate. The output end of the servo motor is connected with a first threaded rod. The first threaded rod is rotatably connected in the top plate. A connecting block is threadedly connected to the first threaded rod. The connecting block is slidably connected in the top plate. A first guide plate is welded and fixed on the bottom end face of the connecting block. A first guide groove is penetrated and opened in the first guide plate. A guide rod is limitedly slidably connected in the first guide groove. A second guide plate is welded and fixed on the bottom end face of the top plate. A second guide groove is opened in the second guide plate. One end of the guide rod is limitedly slidably connected in the second guide groove. The other end of the guide rod is welded and fixed with an adapter plate. A telescopic sleeve rod is welded and fixed on the adapter plate.

[0008] Among them, the servo motors are symmetrically distributed on both sides of the top plate. The servo motors and the connecting blocks are in one-to-one correspondence through the first threaded rods. The connecting blocks and the first guide plates are in one-to-one correspondence. The connecting block is fixed at the middle part of the top of the first guide plate. The first guide groove is in an inverted "V" shape. The first guide plates and the second guide plates are in one-to-one correspondence. The first guide plate and the second guide plate are parallel to each other. The lowest end of the first guide groove is flush with the lowest end of the second guide groove. The topmost end of the first guide groove is flush with the topmost end of the second guide groove. The guide rod and the telescopic sleeve rod are both symmetrically distributed at the middle parts on both sides of the adapter plate.

[0009] Among them, a slider is welded and fixed to the top end of the telescopic sleeve rod. The cross-section of the slider is in a "T" shape. The slider is connected to the top of the first guide plate in a limiting and sliding manner. A positioning groove is formed through the connecting plate. A first connecting spring is welded and fixed to the side end surface of the connecting plate. The other end of the first connecting spring is welded and fixed to a first clamping rod. A filling frame is connected to the positioning groove in a sliding manner. A first clamping groove is formed in the top side end of the filling frame. The end of the first clamping rod is clamped and connected to the first clamping groove. A filter screen plate and a screen plate are fixedly connected to the bottom of the filling frame. The positioning grooves are symmetrically distributed on both sides of the connecting plate. The first clamping rods are symmetrically distributed on both sides of the positioning groove. The first clamping rods correspond to the first clamping grooves one by one. The filling frame is made of a transparent material.

[0010] Among them, the multi-functional monitoring component includes a storage frame and a coil. The storage frame is welded and fixed to the top plate. A first hydraulic rod is installed and fixed to the top of the storage frame. The bottom end of the first hydraulic rod is installed and fixed to a connecting frame. A rotating shaft is rotatably connected to the connecting frame. A first bevel gear is welded and fixed to the bottom end of the rotating shaft. A second bevel gear is meshed and connected to the first bevel gear. A second threaded rod is welded and fixed to the second bevel gear. The second threaded rod is rotatably connected to the storage frame. A first mounting block is threadedly connected to the second threaded rod. The first mounting block is connected to the connecting frame in a limiting and sliding manner. A displacement gauge is bolted to the bottom of the first mounting block. A second mounting block is fixedly connected to the displacement gauge. A pore pressure gauge is bolted to the side end surface of the second mounting block. A monitoring device is installed and fixed to the top end surface of the storage frame. The first hydraulic rods are symmetrically distributed on both sides of the top of the connecting frame. The rotating shaft is connected to the middle part of the connecting frame. The second bevel gears are symmetrically distributed on both sides of the first bevel gear. The second bevel gears correspond to the first mounting blocks one by one through the second threaded rods. The second threaded rod is connected to the middle part of the first mounting block.

[0011] Among them, a traction rope is fixedly connected to the top end surface of the connecting frame. The top of the traction rope is wound around the coil. A driven shaft is welded and fixed to the coil. The driven shaft is rotatably connected to the storage frame. The traction ropes are symmetrically distributed on both sides of the top of the connecting frame. The traction ropes correspond to the driven shafts one by one through the coil. A limiting frame is welded and fixed to the inner wall of the storage frame. A scroll spring is welded and fixed to the limiting frame. The inner end of the scroll spring is welded and fixed to the driven shaft.

[0012] Among them, a push block is fixedly welded on the driven shaft, a limiting rod is fixedly welded on the outer wall of the storage frame, a return spring is sleeved on the limiting rod, a push plate is connected to the limiting rod in a limited sliding manner, the bottom end of the return spring is fixedly welded to the bottom end of the limiting rod, the top end of the return spring is fixedly welded to the bottom end surface of the push plate, the push plate is slidably connected through the side end of the storage frame, a brush plate is fixedly welded on the side end surface of the push plate, a flexible brush is fixedly connected to the brush plate, the push blocks correspond to the driven shafts one by one, the push blocks are elliptical, the push plates are symmetrically distributed on both sides of the storage frame, the push plates correspond to the limiting rods and the brush plates one by one, the flexible brushes are equidistantly distributed on the brush plate, the push plate is fixed at the middle position of the top side end of the brush plate, and the length of the limiting rod is greater than the length of the push block.

[0013] Among them, an installation frame is sleeved at the bottom of the sealing frame, a second connecting spring is fixedly connected to the side end surface of the installation frame, the other end of the second connecting spring is fixedly welded with a second clamping rod, the second clamping rod is slidably connected through the side end of the installation frame, the end of the second clamping rod is clamped and connected in a second clamping groove, a filter screen frame and a screen frame are fixedly connected to the inner bottom end surface of the installation frame, a third threaded rod is threadedly connected to the installation frame, the top end of the third threaded rod is rotatably connected with a support plate, the support plate is slidably connected in the filter screen frame, a telescopic sleeve frame is fixedly welded to the bottom end surface of the support plate, the bottom of the telescopic sleeve frame is fixedly connected to the installation frame, a water pressure gauge is installed on the support plate, and the water pressure gauge is slidably connected through the bottom of the installation frame.

[0014] Among them, the inner wall of the installation frame is attached to the outer wall of the sealing frame, the outer wall of the screen frame is attached to the inner wall of the sealing frame, the third threaded rod is connected to the central part of the bottom of the installation frame, the side end surface of the support plate is attached to the inner wall of the filter screen frame, both the sealing frame and the installation frame are made of transparent materials, and the first connecting pipe, the second connecting pipe, the third connecting pipe and the fourth connecting pipe are all rubber hoses.

[0015] A method for checking and calculating the outburst of a composite water-resisting layer includes the following steps:

[0016] S1: The composite water-resisting layer is two layers of soil bodies, that is, it is divided into an upper soil body with a thickness of h1, a length of a, and a width of b, and a lower soil body with a thickness of h2, a length of a, and a width of b;

[0017] S2: Calculate the lower confined water load: Pw = abHwYw, where Hw is the confined water head and Yw is the unit weight of water;

[0018] S3: Calculate the self-weight of the soil body: G = ab(h1y1 + h2y2), where h is the thickness of the water-resisting layer soil body and y is the unit weight of the soil;

[0019] S4: Calculate the shear stress on the side wall of the soil mass: Since the composite reinforcement impervious layer has become two layers of soil, the static earth pressure of the two layers of soil should be calculated separately according to the calculation method of the static earth pressure of the soil mass at this time;

[0020]

[0021] σ 上层土体 = K1γh

[0022] σ 下层土体 = K2∑γ×h

[0023] Where: K1, K2 - are the coefficients of static earth pressure of the soil mass, generally taken as

[0024] At this time, for the upper soil mass:

[0025]

[0026] For the lower soil mass:

[0027]

[0028] Combining the above loads and according to the requirements of the safety factor in the "Technical Specification for Building Foundation Pit Support", define the safety factor K of the foundation pit heave. At this time:

[0029]

[0030] In the above formula:

[0031] a - is the width of the cross-section of the heaving soil mass,

[0032] b - is the length of the heaving soil mass

[0033] h1 - is the thickness of the upper soil mass

[0034] h2 - is the thickness of the lower soil mass

[0035] γ1, γ2 - are the unit weights of the upper and lower soil masses

[0036] c1, c2 - are the cohesion of the upper and lower soil masses,

[0037] - are the friction angles of the upper and lower soil masses

[0038] H w - is the piezometric head height

[0039] γ w - is the unit weight of water.

[0040] Beneficial effects

[0041] A composite water-resisting layer bursting experiment device and checking method provided by the present invention have the following beneficial effects:

[0042] 1. The filling box is provided to fill the composite water-resisting layer, which is convenient for subsequent experimental monitoring. Driven by the servo motor, the connecting block threaded on the first threaded rod can drive the first guide plate to move forward or backward. At this time, under the combined guiding action of the first guide groove and the second guide groove, the connecting rod can drive the connecting plate to move smoothly along the track of the second guide groove. By the forward or backward movement of the connecting plate, the filling boxes on both sides can be driven to alternately insert into the sealing box. Therefore, when the bursting experiment is carried out on the composite water-resisting layer in one filling box, the staff can carry out the filling work of the composite water-resisting layer in the filling box on the other side. So after the bursting experiment of the composite water-resisting layer in one filling box is completed, the bursting experiment of another type of composite water-resisting layer can be carried out immediately. In this way, the continuous experimental work of the bursting experiment device is realized, and at the same time, the feeding efficiency of the composite water-resisting layer is improved, making up for the defect that the existing bursting experiment device needs to stop working for a long time to carry out the loading and unloading of the composite water-resisting layer when carrying out the bursting experiment on different types of composite water-resisting layers, and effectively improving the working efficiency of the bursting experiment device.

[0043] 2. Through the cooperation of the first clamping rod and the first clamping groove, the convenient disassembly and assembly of the filling box are realized, which can ensure the convenience and high efficiency of the subsequent loading and unloading and cleaning work of the composite water-resisting layer, and further improve the working efficiency of the bursting experiment device.

[0044] 3. The first hydraulic rod is provided to push each displacement gauge and pore pressure gauge to stably insert into the appropriate depth of the composite water-resisting layer. And by rotating the second threaded rods on both sides, the convenient and stable position adjustment of each displacement gauge and pore pressure gauge can be further carried out, realizing the convenient adjustment and positioning work of each displacement gauge and pore pressure gauge, and ensuring the stability and convenience of the subsequent data monitoring work.

[0045] 4. The first hydraulic rod can drive each displacement gauge and pore pressure gauge after the work is completed to move upward and reset through the connecting frame. Combined with the storage box, each displacement gauge and pore pressure gauge can be stored and protected. At the same time, when the connecting frame moves upward, the end of the traction rope can be driven to move synchronously. At this time, under the elastic action of the scroll spring, the driven shaft can drive the push block to rotate automatically. Combined with the return spring, the brush plate on the push plate can be pushed to move up and down reciprocally automatically and stably, realizing the automatic cleaning treatment of each displacement gauge and pore pressure gauge, avoiding the soil of the composite water-resisting layer from adhering to the displacement gauge and pore pressure gauge and affecting the stability of the subsequent monitoring work, and increasing the use diversity of the bursting experiment device.

[0046] 5. Through the cooperation of the provided second card slot and the second card rod, the convenient disassembly and assembly of the installation frame are realized. By conveniently disassembling and assembling the installation frame, the convenient and stable feeding and discharging of the filling material at the confined aquifer can be carried out according to actual needs. Moreover, by the threaded rotation of the third threaded rod, combined with the support plate and the telescopic sleeve frame, the thickness at the confined aquifer can be conveniently adjusted according to actual needs, and the water inrush phenomenon of the composite water-resistant layer under different conditions can be further simulated actually. Brief Description of the Drawings

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0048] Figure 1 Schematic diagram of the overall three-dimensional structure of the present invention;

[0049] Figure 2 Schematic diagram of the connection structure of the water storage tank and the fourth connecting pipe of the present invention;

[0050] Figure 3 Schematic diagram of the connection structure of the connecting plate and the telescopic sleeve rod of the present invention;

[0051] Figure 4 Schematic diagram of the three-dimensional structure of the telescopic sleeve frame of the present invention;

[0052] Figure 5 Schematic diagram of the connection structure of the filter screen frame and the screen frame of the present invention;

[0053] Figure 6 Schematic diagram of the overall front view structure of the present invention;

[0054] Figure 7 Schematic diagram of the side sectional structure of the top plate of the present invention;

[0055] Figure 8 Schematic diagram of the side view structure of the connecting plate of the present invention;

[0056] Figure 9 Schematic diagram of the side view structure of the first guide groove of the present invention;

[0057] Figure 10 Schematic diagram of the side view structure of the second guide groove of the present invention;

[0058] Figure 11 Schematic diagram of the side sectional structure of the first guide plate of the present invention;

[0059] Figure 12 Schematic diagram of the main sectional structure of the sealing frame of the present invention;

[0060] Figure 13 Schematic diagram of the main sectional view of the installation frame of the present invention;

[0061] Figure 14 Schematic diagram of the main sectional view of the filling frame of the present invention;

[0062] Figure 15 Schematic diagram of the top sectional view of the sealing frame of the present invention;

[0063] Figure 16 Schematic diagram of the main sectional view of the connecting frame of the present invention;

[0064] Figure 17 Schematic diagram of the side sectional view of the connecting frame of the present invention;

[0065] Figure 18 Schematic diagram of the main sectional view of the storage frame of the present invention;

[0066] Figure 19 For the present invention Figure 18 Schematic diagram of the enlarged structure at position A in;

[0067] Figure 20 Schematic diagram of the side view of the push block of the present invention;

[0068] Figure 21 Schematic diagram of the side view of the scroll spring of the present invention;

[0069] Figure 22 Schematic diagram of the top sectional view of the storage frame of the present invention;

[0070] Figure 23 Schematic diagram of the main sectional view of the transfer box of the present invention;

[0071] Figure 24 Schematic diagram of the top sectional view of the transfer box of the present invention.

[0072] Indicated in the figure: 1. Fixing frame; 2. Support base; 3. Side plate; 4. Top plate; 5. Alternating experiment assembly; 501. Servo motor; 502. First threaded rod; 503. Connecting block; 504. First guide plate; 505. First guide groove; 506. Guide rod; 507. Connecting plate; 508. Telescopic sleeve; 509. Slider; 510. Second guide plate; 511. Second guide groove; 512. Positioning groove; 513. First connecting spring; 514. First clamping rod; 515. Filling frame; 516. First clamping groove; 517. Filter plate; 518. Mesh plate; 6. Multifunctional monitoring assembly; 601. Storage frame; 602. First hydraulic rod; 603. Connecting frame; 604. Rotating shaft; 605. First bevel gear; 606. Second bevel gear; 607. Second threaded rod; 608. First mounting block; 609 , displacement meter; 610, second mounting block; 611, piezometer; 612, monitoring equipment; 613, traction rope; 614, coil; 615, driven shaft; 616, limit frame; 617, scroll spring; 618, push block; 619, limit rod; 620, return spring; 621, push plate; 622, brush plate; 623, flexible brush; 7, fixing plate; 8, sealing frame; 9, second slot; 10, installation Frame; 11. Second connecting spring; 12. Second clamping rod; 13. Filter frame; 14. Screen frame; 15. Third threaded rod; 16. Support plate; 17. Telescopic sleeve; 18. Water pressure gauge; 19. Water storage tank; 20. Fixed pipe; 21. Water pump; 22. First connecting pipe; 23. Transfer box; 24. Partition plate; 25. Second connecting pipe; 26. Third connecting pipe; 27. Second hydraulic rod; 28. Fourth connecting pipe. DETAILED DESCRIPTION

[0073] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0074] Embodiment 1:

[0075] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 、 Figure 14 、、 Figure 16 、 Figure 17 、 Figure 18 、 Figure 19 、 Figure 20 、 Figure 21 、 Figure 22 、Figure 23 and Figure 24 As shown in Figure 23 and Figure 24 , this embodiment proposes a composite water-resisting layer bursting experiment device, including a fixing frame 1. A support base 2 is welded and fixed at the bottom of the fixing frame 1. A side plate 3 is welded and fixed on the fixing frame 1. A top plate 4 is welded and fixed at the top of the side plate 3. An alternating experiment component 5 is installed on the top plate 4. A multi-functional monitoring component 6 is installed on the top plate 4. A fixing plate 7 is welded and fixed on the side end face of the side plate 3. One end of the fixing plate 7 is fixedly connected to a sealing frame 8. A second card slot 9 is opened at the bottom side end of the sealing frame 8. A water storage tank 19 is welded and fixed on the top end face of the fixing frame 1. A fixing pipe 20 is connected to the side end of the water storage tank 19. An electromagnetic valve is installed on the fixing pipe 20. A water pump 21 is installed on the top of the water storage tank 19. The water pump 21 is flange-connected to a first connecting pipe 22. The bottom of the first connecting pipe 22 is arranged inside the water storage tank 19. The top end of the first connecting pipe 22 is connected to a transfer tank 23. A partition plate 24 is fixedly connected inside the transfer tank 23. The bottom end of the transfer tank 23 is connected to a second connecting pipe 25. The other end of the second connecting pipe 25 is connected to one side of the sealing frame 8. The other side of the sealing frame 8 is connected to a fourth connecting pipe 28. The bottom end of the fourth connecting pipe 28 is connected to the top of the water storage tank 19. The top side end of the transfer tank 23 is connected to a third connecting pipe 26. The bottom end of the third connecting pipe 26 is connected to the top of the water storage tank 19. A second hydraulic rod 27 is installed and fixed on the side end face of the side plate 3. The top end of the second hydraulic rod 27 is fixedly connected to the side end face of the transfer tank 23. By using the alternating experiment component 5, after a composite water-resisting layer bursting experiment is completed, another type of composite water-resisting layer bursting experiment can be immediately carried out. In this way, continuous experimental work of the bursting experiment device can be realized, and at the same time, the feeding efficiency of the composite water-resisting layer is improved, making up for the defect that the existing bursting experiment device needs to stop working for a long time to carry out the loading and unloading of the composite water-resisting layer when conducting bursting experiments on different types of composite water-resisting layers, effectively improving the working efficiency of the bursting experiment device. And combined with the multi-functional monitoring component 6, the monitoring points can be conveniently adjusted and positioned, and at the same time, the device can automatically clean and store itself for protection, increasing the diversity of the use of the bursting experiment device.

[0076] Example 2:

[0077] The following further introduces the solution in Example 1 in combination with the specific working mode, as detailed in the following description:

[0078] As Figure 1 、 Figure 3 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 and Figure 12As shown, as a preferred embodiment, on the basis of the above method, further, the alternating experiment assembly 5 includes a servo motor 501, the servo motor 501 is fixedly installed on the top plate 4, the output end of the servo motor 501 is connected with a first threaded rod 502, the first threaded rod 502 is rotatably connected in the top plate 4, a connecting block 503 is threadedly connected to the first threaded rod 502, the connecting block 503 is slidably connected in the top plate 4, a first guide plate 504 is welded and fixed to the bottom end surface of the connecting block 503, a first guide groove 505 is formed through the first guide plate 504, a guide rod 506 is slidably connected in the first guide groove 505 in a limited manner, a second guide plate 510 is welded and fixed to the bottom end surface of the top plate 4, a second guide groove 511 is formed in the second guide plate 510, one end of the guide rod 506 is slidably connected in the second guide groove 511 in a limited manner, a connecting plate 507 is welded and fixed to the other end of the guide rod 506, a telescopic sleeve rod 508 is welded and fixed to the connecting plate 507, the servo motors 501 are symmetrically distributed on both sides of the top plate 4, the servo motors 501 and the connecting blocks 503 are in one-to-one correspondence through the first threaded rods 502, the connecting blocks 503 and the first guide plates 504 are in one-to-one correspondence, the connecting block 503 is fixed in the middle of the top of the first guide plate 504, the first guide groove 505 is in an inverted "V" shape, the first guide plates 504 and the second guide plates 510 are in one-to-one correspondence, the first guide plates 504 and the second guide plates 510 are parallel to each other, the lowest end of the first guide groove 505 is flush with the lowest end of the second guide groove 511, the topmost end of the first guide groove 505 is flush with the topmost end of the second guide groove 511, the guide rod 506 and the telescopic sleeve rod 508 are symmetrically distributed in the middle of both sides of the connecting plate 507. By using the connecting block 503 threadedly connected to the first threaded rod 502, the first guide plate 504 can be driven to move forward or backward. At this time, under the combined guiding action of the first guide groove 505 and the second guide groove 511, the connecting plate 507 can be driven to move smoothly along the track of the second guide groove 511 through the guide rod 506. By using the forward or backward movement of the connecting plate 507, the filling frames 515 on both sides can be alternately inserted into the sealing frame 8. Therefore, when the composite water barrier layer in one filling frame 515 is undergoing a bursting experiment, the staff can perform the filling work of the composite water barrier layer in the filling frame 515 on the other side. Therefore, after the bursting experiment of the composite water barrier layer in one filling frame 515 is completed, the bursting experiment of another type of composite water barrier layer can be immediately carried out. In this way, the continuous experimental work of the bursting experiment device is realized, and at the same time, the feeding efficiency of the composite water barrier layer is improved.

[0079] As Figure 3 , Figure 6 , Figure 7 , Figure 8 , Figure 11 , Figure 12 and Figure 14As shown, as a preferred embodiment, on the basis of the above method, further, a slider 509 is welded and fixed to the top end of the telescopic sleeve rod 508. The cross-section of the slider 509 is in the shape of a "T". The slider 509 is connected in a limited sliding manner to the top of the first guide plate 504. A positioning groove 512 is formed through the connecting plate 507. A first connecting spring 513 is welded and fixed to the side end surface of the connecting plate 507. The other end of the first connecting spring 513 is welded and fixed to a first clamping rod 514. A filling frame 515 is slidably connected in the positioning groove 512. A first clamping groove 516 is formed in the top side end of the filling frame 515. The end of the first clamping rod 514 is clamped and connected in the first clamping groove 516. A filter screen plate 517 and a screen plate 518 are fixedly connected to the bottom of the filling frame 515. The positioning grooves 512 are symmetrically distributed on both sides of the connecting plate 507. The first clamping rods 514 are symmetrically distributed on both sides of the positioning groove 512. The first clamping rods 514 correspond to the first clamping grooves 516 one by one. The filling frame 515 is made of a transparent material. By using the cooperation of the first clamping rod 514 and the first clamping groove 516, the convenient disassembly and assembly of the filling frame 515 are realized, and further, the convenience and efficiency of the subsequent loading, unloading and cleaning of the composite water barrier layer can be ensured, and the working efficiency of the heave experiment device is further improved.

[0080] As Figure 1 , Figure 6 , Figure 12 , Figure 16 , Figure 17 and Figure 18As shown, as a preferred embodiment, on the basis of the above method, further, the multifunctional monitoring component 6 includes a storage frame 601 and a coil 614. The storage frame 601 is welded and fixed to the top plate 4. A first hydraulic rod 602 is installed and fixed on the top of the storage frame 601. A connection frame 603 is installed and fixed at the bottom end of the first hydraulic rod 602. A rotating shaft 604 is rotatably connected to the connection frame 603. A first bevel gear 605 is welded and fixed at the bottom end of the rotating shaft 604. A second bevel gear 606 is meshed with the first bevel gear 605. A second threaded rod 607 is welded and fixed to the second bevel gear 606. The second threaded rod 607 is rotatably connected in the storage frame 601. A first mounting block 608 is threadedly connected to the second threaded rod 607. The first mounting block 608 is limited and slidably connected in the connection frame 603. A displacement gauge 609 is bolted to the bottom of the first mounting block 608. A second mounting block 610 is fixedly connected to the displacement gauge 609. A pore pressure gauge 611 is bolted to the side end face of the second mounting block 610. A monitoring device 612 is installed and fixed on the top end face of the storage frame 601. The first hydraulic rods 602 are symmetrically distributed on both sides of the top of the connection frame 603. The rotating shaft 604 is connected to the middle part of the connection frame 603. The second bevel gears 606 are symmetrically distributed on both sides of the first bevel gear 605. The second bevel gears 606 are in one-to-one correspondence with the first mounting blocks 608 through the second threaded rods 607. The second threaded rods 607 are connected to the middle parts of the first mounting blocks 608. Both the displacement gauge 609 and the pore pressure gauge 611 are connected to the monitoring device 612 through cables. The first hydraulic rod 602 can be used to push each displacement gauge 609 and pore pressure gauge 611 to stably insert into the appropriate depth of the composite water barrier layer. And by rotating the second threaded rods 607 on both sides, the positions of each displacement gauge 609 and pore pressure gauge 611 can be further adjusted conveniently and stably, realizing the convenient adjustment and positioning work of each displacement gauge 609 and pore pressure gauge 611, and ensuring the stability and convenience of subsequent data monitoring work.

[0081] As Figure 18 , Figure 19 , Figure 20 , Figure 21 and Figure 22As shown, as a preferred embodiment, on the basis of the above method, further, a towing rope 613 is fixedly connected to the top surface of the connection frame 603. The top of the towing rope 613 is wound around a coil 614. A driven shaft 615 is welded and fixed on the coil 614. The driven shaft 615 is rotatably connected to the storage frame 601. The towing ropes 613 are symmetrically distributed on both sides of the top of the connection frame 603. The towing ropes 613 are in one-to-one correspondence with the driven shaft 615 through the coil 614. A limiting frame 616 is welded and fixed on the inner wall of the storage frame 601. A scroll spring 617 is welded and fixed inside the limiting frame 616. The inner end of the scroll spring 617 is welded and fixed on the driven shaft 615. A push block 618 is welded and fixed on the driven shaft 615. A limiting rod 619 is welded and fixed on the outer wall of the storage frame 601. A return spring 620 is sleeved on the limiting rod 619. A push plate 621 is slidably connected to the limiting rod 619 in a limited manner. The bottom end of the return spring 620 is welded and fixed to the bottom end of the limiting rod 619. The top end of the return spring 620 is welded and fixed to the bottom surface of the push plate 621. The push plate 621 is slidably connected through the side end of the storage frame 601. A brush plate 622 is welded and fixed to the side end of the push plate 621. A flexible brush 623 is fixedly connected to the brush plate 622. The push blocks 618 are in one-to-one correspondence with the driven shaft 615. The push blocks 618 are elliptical. The push plates 621 are symmetrically distributed on both sides of the storage frame 601. The push plates 621 are in one-to-one correspondence with the limiting rods 619 and the brush plates 622 respectively. The flexible brushes 623 are equidistantly distributed on the brush plate 622. The push plate 621 is fixed in the middle of the top side end of the brush plate 622. The length of the limiting rod 619 is greater than the length of the push block 618. By using the first hydraulic rod 602, the displacement gauges 609 and pore pressure gauges 611 after the work can be driven to move upward and reset through the connection frame 603. Combining with the storage frame 601, the displacement gauges 609 and pore pressure gauges 611 can be stored and protected. At the same time, during the upward movement of the connection frame 603, the end of the towing rope 613 can be driven to move synchronously. At this time, under the elastic action of the scroll spring 617, the push block 618 can be driven to rotate automatically through the driven shaft 615. Combining with the return spring 620, the brush plate 622 on the push plate 621 can be pushed to perform an automatic and stable reciprocating up and down movement, realizing the automatic cleaning treatment of the displacement gauges 609 and pore pressure gauges 611.

[0082] As Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 12 , Figure 13 and Figure 15As shown, as a preferred embodiment, on the basis of the above method, further, an installation frame 10 is sleeved at the bottom of the sealing frame 8. A second connecting spring 11 is fixedly connected to the side end surface of the installation frame 10. The other end of the second connecting spring 11 is welded and fixed with a second clamping rod 12. The second clamping rod 12 is slidably connected through the side end of the installation frame 10. The end of the second clamping rod 12 is snap-fitted in the second clamping groove 9. A filter screen frame 13 and a screen frame 14 are fixedly connected to the inner bottom end surface of the installation frame 10. A third threaded rod 15 is threadedly connected to the installation frame 10. The top end of the third threaded rod 15 is rotatably connected with a support plate 16. The support plate 16 is slidably connected in the filter screen frame 13. A telescopic sleeve frame 17 is welded and fixed to the bottom end surface of the support plate 16. The bottom of the telescopic sleeve frame 17 is fixedly connected to the installation frame 10. A water pressure gauge 18 is installed on the support plate 16. The water pressure gauge 18 is slidably connected through the bottom of the installation frame 10. The inner wall of the installation frame 10 is attached to the outer wall of the sealing frame 8. The outer wall of the screen frame 14 is attached to the inner wall of the sealing frame 8. The third threaded rod 15 is connected to the center of the bottom of the installation frame 10. The side end surface of the support plate 16 is attached to the inner wall of the filter screen frame 13. Both the sealing frame 8 and the installation frame 10 are made of transparent materials. The first connecting pipe 22, the second connecting pipe 25, the third connecting pipe 26 and the fourth connecting pipe 28 are all rubber hoses. By using the cooperation of the second clamping groove 9 and the second clamping rod 12, the convenient disassembly and assembly of the installation frame 10 are realized. By conveniently disassembling and assembling the installation frame 10, the convenient and stable loading and unloading of the filling material at the confined aquifer can be carried out according to actual needs. And by using the threaded rotation of the third threaded rod 15, combined with the support plate 16 and the telescopic sleeve frame 17, the thickness at the confined aquifer can be conveniently adjusted according to actual needs.

[0083] Embodiment 3:

[0084] The solutions in Embodiment 1 and Embodiment 2 will be further introduced below in combination with specific working methods. See the following description for details:

[0085] Specifically, when the composite water-resisting layer bursting experiment device and the checking calculation method are in use: First, the staff first pulls the second clamping rods 12 on both sides of the installation frame 10 outwards until the second clamping rods 12 move out of the second clamping grooves 9 on the sealing frame 8. At this time, the installation frame 10 can move away from the sealing frame 8 to complete the disassembly of the installation frame 10. Subsequently, the staff can fill the filter screen frame 13 in the installation frame 10 with coarse-grained quartz sand to make the confined aquifer. At the same time, the staff can rotate the third threaded rod 15 on the installation frame 10. Under the threaded rotation action of the third threaded rod 15, the support plate 16 can be pushed to move upwards or downwards. Under the movement action of the support plate 16, the storage space inside the filter screen frame 13 can be conveniently adjusted, and thus the thickness of the confined aquifer can be conveniently adjusted according to actual needs. During the movement of the support plate 16, the telescopic sleeve frame 17 can be driven to automatically expand and contract. Under the expansion and contraction action of the telescopic sleeve frame 17, the flow of water from below the support plate 16 can be avoided, ensuring the stable flow of water in the confined aquifer, and thus ensuring the stability and accuracy of the environmental simulation work. After the coarse-grained quartz sand is filled, the staff can pull the second clamping rods 12 on both sides of the installation frame 10 outwards again. At the same time, the installation frame 10 is clamped at the bottom of the sealing frame 8. Subsequently, the staff can release the second clamping rods 12. At this time, under the elastic action of the second connecting spring 11, the second clamping rods 12 can be driven to automatically engage into the second clamping grooves 9 on the sealing frame 8 to complete the clamping installation of the installation frame 10 and ensure the stability of the subsequent working state of the confined aquifer;

[0086] In the initial state, a filling box 515 is inserted into the sealing box 8, and the other filling box 515 is located on the front side of the whole device. At this time, the staff can mix low-permeability materials such as river sand, clay, barite powder, machine oil, clay, and mudstone, which are the lower-layer materials of the composite water barrier, and fill them into the filling box 515. After the lower-layer materials are filled, the upper-layer materials such as river sand, clay, barite powder, machine oil, clay, and mudstone, which are also low-permeability materials, can be mixed and filled into the filling box 515 to complete the filling of the composite water barrier. After the filling of the composite water barrier is completed inside the filling box 515 on the side, the staff can drive the servo motors 501 on both sides of the top plate 4. Under the driving action of the servo motors 501 on both sides, the first threaded rods 502 on both sides can be driven to rotate simultaneously. At this time, under the rotation of the first threaded rods 502 on both sides, the first guide plates 504 on the connecting blocks 503 on both sides can be driven to move backward simultaneously. Under the movement of the first guide plates 504, the guide rod 506 can be pushed along the inclined surface on one side of the first guide groove 505 to move vertically upward along the trajectory on the outermost side of the second guide groove 511. At this time, under the movement of the guide rod 506, the filling boxes 515 on both sides can be driven to move upward synchronously through the connecting plate 507. At this time, the empty filling box 515 can automatically move and separate from the sealing box 8. At this time, under the guiding action of the movement of the first guide groove 505, the guide rod 506 can be pushed to move to the inflection point at the top of the first guide groove 505 and the top of one side of the second guide groove 511. At this time, the empty filling box 515 can automatically move and separate from the sealing box 8;

[0087] Subsequently, under the continuous rotation of the first threaded rod 502, the guide rod 506 can be pushed to continue moving along the second guide groove 511 on the second guide plate 510 through the first guide plate 504 on the connecting block 503. At this time, the guide rod 506 can drive the filling boxes 515 on both sides of the connecting plate 507 to move horizontally along the second guide groove 511 until the guide rod 506 moves to the inflection point on the other side of the second guide groove 511. At this time, under the horizontal movement of the filling boxes 515 on both sides, the filling box 515 filled with the composite water barrier can automatically move to directly above the sealing box 8, and the empty filling box 515 moves to the rear side of the whole device, facilitating subsequent filling work. Subsequently, under the continuous movement of the first guide plate 504, at this time, the guide rod 506 can move to the inclined part on the other side of the first guide groove 505. At this time, under the continuous movement of the first guide plate 504, the guide rod 506 can move vertically downward from the inflection point on the other side of the second guide groove 511. At this time, the guide rod 506 drives the filling box 515 to move vertically downward through the connecting plate 507. At this time, the filling box 515 filled with the composite water barrier can automatically be inserted into the sealing box 8 to complete the automatic feeding work;

[0088] At this time, the filling frame 515 filled with the composite water barrier layer can be automatically inserted into the sealing frame 8, while the empty filling frame 515 moves to the side of the device. When the composite water barrier layer in one filling frame 515 is undergoing a heaving experiment, the staff can carry out the filling work of the composite water barrier layer in the other filling frame 515 at this time. After the heaving experiment of the composite water barrier layer in one filling frame 515 is completed, the staff can drive the first threaded rod 502 on the servo motor 501 to rotate reversely. At this time, through the reverse rotation of the first guide plate 504, it can drive the guide rod 506 to move reversely by combining the first guide groove 505 and the second guide groove 511. However, the movement trajectories are the same. Therefore, the guide rod 506 can drive the filling frames 515 on both sides to exchange positions again through the connecting plate 507. At this time, the filling frame 515 filled with the new composite water barrier layer can be automatically inserted into the sealing frame 8 to carry out subsequent experimental work; at this time, the staff can move to the filling frame 515 after the experiment and pull the first clamping rods 514 on both sides of the filling frame 515 outward. Under the movement action of the first clamping rods 514, it can move out of the first clamping grooves 516 on the filling frame 515. At this time, the filling frame 515 can move out of the positioning grooves 512 on the connecting plate 507 to complete the disassembly of the filling frame 515. Subsequently, the staff can transfer and dump the materials in the filling frame 515 to the recycling place. Then the staff can pull the first clamping rods 514 outward again. At the same time, the staff can insert the filling frame 515 into the positioning grooves 512 on the connecting plate 507, and then release the first clamping rods 514. At this time, under the elastic action of the first connecting spring 513, it can drive the first clamping rods 514 to automatically engage into the first clamping grooves 516 on the filling frame 515 to complete the clamping and installation of the filling frame 515, ensuring the stability and convenience of the subsequent filling and manufacturing work of the composite water barrier layer;

[0089] In summary, during the heaving experiment of the composite water barrier layer in one filling frame 515, another type of composite water barrier layer can be made in the other filling frame 515. Therefore, after the heaving experiment of the composite water barrier layer in one filling frame 515 is completed, the feeding and heaving experiment of another type of composite water barrier layer can be carried out immediately. In this way, the continuous experimental work of the heaving experiment device is realized, and at the same time, the feeding efficiency and experimental efficiency of the composite water barrier layer are improved; during the upward and downward movement of the connecting plate 507, it can drive the telescopic sleeve rod 508 to contract and extend. When the connecting plate 507 has a relative displacement with the first guide plate 504, the telescopic sleeve rod 508 can drive the slider 509 to slide limit on the first guide plate 504. Under the limit action of the telescopic sleeve rods 508 on both sides, the connecting plate 507 can be stably limited, ensuring that the connecting plate 507 on the guide rod 506 always maintains a horizontal integrity, and preventing the connecting plate 507 from rotating around the guide rod 506 during the movement, affecting the stability of the alternating feeding and discharging work;

[0090] After the filling box 515 is inserted into the sealing box 8, the staff can drive the first hydraulic rod 602 on the storage box 601. Under the driving action of the first hydraulic rod 602, the displacement gauges 609 and pore pressure gauges 611 can be stably pushed into the composite water isolation layer in the filling box 515 through the connecting frame 603. At the same time, the connecting frame 603 can pull the towing rope 613 on the coil 614 to automatically unwind; and before insertion, the staff can rotate the rotating shaft 604 on the connecting frame 603. Under the rotating action of the rotating shaft 604, the first bevel gear 605 can drive the second bevel gears 606 on both sides to engage and rotate, and then the second threaded rods 607 on both sides can be driven to rotate synchronously. At this time, under the synchronous rotation action of the second threaded rods 607 on both sides, the first mounting blocks 608 connected by threads on both sides can be driven to move towards the middle or the side at the same time, and then the displacement gauges 609 on both sides can be driven to move towards the middle or the side at the same time. During the movement of the displacement gauge 609, the pore pressure gauge 611 can be driven to move synchronously through the second mounting block 610, and then the position adjustment work of each displacement gauge 609 and pore pressure gauge 611 can be conveniently completed, realizing the convenient adjustment and positioning of each displacement gauge 609 and pore pressure gauge 611, and ensuring the stability and convenience of subsequent data monitoring work;

[0091] After each displacement gauge 609 and pore pressure gauge 611 are stably inserted into the composite water isolation layer in the filling box 515, the staff can drive the water pump 21 on the water storage tank 19. At this time, the water pump 21 can transport the water in the water storage tank 19 to one side inside the transfer tank 23 through the first connecting pipe 22. Then the water can cross the partition plate 24 and be transported to the second connecting pipe 25. At this time, the water can be transported into the sealing box 8 through the second connecting pipe 25. Then the water penetrates through the filter mesh frame 13 and the screen frame 14 and enters the filled coarse-grained quartz sand to form a confined aquifer. At this time, the water in the confined aquifer can penetrate through the filter plate 517 and the screen plate 518 at the bottom of the filling box 515 and contact the composite water isolation layer in the filling box 515 to conduct a bursting experiment; and during the experiment, the excess water inside the transfer tank 23 can flow back to the water storage tank 19 through the third connecting pipe 26 for automatic pressure relief to ensure the constancy of the water pressure inside the transfer tank 23, and the excess water inside the confined aquifer is transported to the water storage tank 19 through the fourth connecting pipe 28 to complete the recycling of water; and during the experiment, the transfer tank 23 can be pushed up or down by the second hydraulic rod 27, and then the water head height of the confined aquifer can be conveniently adjusted, so that the water pressure of the confined aquifer can be conveniently adjusted, and the water pressure of the confined aquifer can be monitored in real time in combination with the water pressure gauge 18;

[0092] During the experiment, displacement gauges 609 and pore pressure gauges 611 can be used to monitor the displacement data and pore pressure data of the composite water barrier layer in real time. Moreover, it is also possible to directly observe whether a bursting phenomenon occurs in the composite water barrier layer under a certain water pressure. By simulating the influence of the water pressure of the confined aquifer on the bursting failure of the soil body of the composite water barrier layer, the critical bursting head and the critical thickness of the water barrier layer can be obtained. And through the analysis of monitoring data such as displacement gauges 609 and pore pressure gauges 611, the influence laws of void ratios, mechanical parameters, etc. of different types of soil bodies on the bursting failure of the soil body can be obtained, and the physical meaning of the safety factor in the foundation pit dewatering can be clarified;

[0093] After the experimental work is completed, the first hydraulic rod 602 can drive each of the displacement gauges 609 and pore pressure gauges 611 after the work is completed to move upward and reset through the connecting frame 603. Combining with the storage frame 601, each of the displacement gauges 609 and pore pressure gauges 611 can be stored and protected. At the same time, during the upward movement of the connecting frame 603, the end of the traction rope 613 can be driven to move upward synchronously. At this time, under the elastic action of the scroll spring 617 inside the limit frame 616, the driven shaft 615 on the coil 614 can be driven to rotate automatically in the reverse direction. At this time, the coil 614 can automatically wind up the traction rope 613 to ensure the stability of the subsequent repeated working state of the traction rope 613. And during the rotation of the driven shaft 615, the push block 618 can be driven to rotate synchronously. Under the elliptical rotation of the push block 618, combining with the return spring 620, the push plate 621 on the limit rod 619 can be pushed to perform automatic and stable reciprocating up and down movements, and then the brush plate 622 can be driven to perform synchronous reciprocating up and down movements. At this time, under the reciprocating up and down movement of the brush plate 622, combining with the flexible brush 623, each of the displacement gauges 609 and pore pressure gauges 611 can be automatically cleaned to prevent the soil of the composite water barrier layer from adhering to the displacement gauges 609 and pore pressure gauges 611 and affecting the stability of the subsequent monitoring work.

[0094] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that various combinations, modifications or equivalent replacements of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should all be covered within the scope of the claims of the present invention.

Claims

1. A composite water-resisting layer bursting experiment device, comprising a fixing frame (1), characterized in that, The bottom of the fixing frame (1) is fixedly welded with a support base (2). A side plate (3) is fixedly welded on the fixing frame (1). The top of the side plate (3) is fixedly welded with a top plate (4). An alternating experiment assembly (5) is installed on the top plate (4). A multi-functional monitoring assembly (6) is installed on the top plate (4). A fixing plate (7) is fixedly welded on the side end face of the side plate (3). The end of the fixing plate (7) is fixedly connected with a sealing frame (8). A second clamping groove (9) is formed at the bottom side end of the sealing frame (8). A water storage tank (19) is fixedly welded on the top end face of the fixing frame (1). A fixing pipe (20) is connected to the side end of the water storage tank (19). A water pump (21) is installed on the top of the water storage tank (19). A first connecting pipe (22) is flange-connected to the water pump (21). The bottom of the first connecting pipe (22) is arranged inside the water storage tank (19). The top end of the first connecting pipe (22) is connected to a transfer tank (23). A partition plate (24) is fixedly connected inside the transfer tank (23). The bottom end of the transfer tank (23) is connected to a second connecting pipe (25). The other end of the second connecting pipe (25) is connected to one side of the sealing frame (8). The other side of the sealing frame (8) is connected to a fourth connecting pipe (28). The bottom end of the fourth connecting pipe (28) is connected to the top of the water storage tank (19). The top side end of the transfer tank (23) is connected to a third connecting pipe (26). The bottom end of the third connecting pipe (26) is connected to the top of the water storage tank (19). A second hydraulic rod (27) is fixedly installed on the side end face of the side plate (3). The top end of the second hydraulic rod (27) is fixedly connected to the side end face of the transfer tank (23).

2. The composite water-resisting layer bursting experiment device according to claim 1, wherein The alternating experiment assembly (5) includes a servo motor (501). The servo motor (501) is fixedly installed on the top plate (4). The output end of the servo motor (501) is connected to a first threaded rod (502). The first threaded rod (502) is rotatably connected inside the top plate (4). A connecting block (503) is threadedly connected to the first threaded rod (502). The connecting block (503) is slidably connected inside the top plate (4). A first guide plate (504) is fixedly welded on the bottom end face of the connecting block (503). A first guide groove (505) is formed through the first guide plate (504). A guide rod (506) is limited and slidably connected inside the first guide groove (505). A second guide plate (510) is fixedly welded on the bottom end face of the top plate (4). A second guide groove (511) is formed on the second guide plate (510). One end of the guide rod (506) is limited and slidably connected inside the second guide groove (511). The other end of the guide rod (506) is fixedly welded with an adapter plate (507). A telescopic sleeve rod (508) is fixedly welded on the adapter plate (507).

3. The composite water-resisting layer bursting experimental device according to claim 2, characterized in that, The servo motors (501) are symmetrically distributed on both sides of the top plate (4). The servo motors (501) correspond to the connecting blocks (503) through the first threaded rods (502). The connecting blocks (503) correspond to the first guide plates (504). The connecting blocks (503) are fixed at the middle part of the top of the first guide plates (504). The first guide groove (505) is in an inverted "V" shape. The first guide plates (504) correspond to the second guide plates (510). The first guide plates (504) and the second guide plates (510) are parallel to each other. The lowest end of the first guide groove (505) is flush with the lowest end of the second guide groove (511). The topmost end of the first guide groove (505) is flush with the topmost end of the second guide groove (511). The guide rods (506) and the telescopic sleeve rods (508) are symmetrically distributed at the middle parts on both sides of the connecting plate (507).

4. A composite water-resisting layer bursting experiment device according to claim 3, characterized in that, The top end of the telescopic sleeve rod (508) is welded and fixed with a slider (509). The cross-section of the slider (509) is in a "T" shape. The slider (509) is connected to the top of the first guide plate (504) in a limited sliding manner. A positioning groove (512) is formed through the connecting plate (507). A first connecting spring (513) is welded and fixed on the side end surface of the connecting plate (507). The other end of the first connecting spring (513) is welded and fixed with a first clamping rod (514). A filling frame (515) is slidably connected in the positioning groove (512). A first clamping groove (516) is formed at the top side end of the filling frame (515). The end of the first clamping rod (514) is clamped and connected in the first clamping groove (516). The bottom of the filling frame (515) is fixedly connected with a filter screen plate (517) and a screen plate (518). The positioning grooves (512) are symmetrically distributed on both sides of the connecting plate (507). The first clamping rods (514) are symmetrically distributed on both sides of the positioning groove (512). The first clamping rods (514) correspond to the first clamping grooves (516) one by one. The filling frame (515) is made of a transparent material.

5. The composite water-resisting layer outburst experimental device according to claim 1, characterized in that, The multifunctional monitoring component (6) includes a storage frame (601) and a coil (614). The storage frame (601) is fixedly welded to the top plate (4). A first hydraulic rod (602) is fixedly installed on the top of the storage frame (601). A connecting frame (603) is fixedly installed at the bottom end of the first hydraulic rod (602). A rotating shaft (604) is rotatably connected to the connecting frame (603). A first bevel gear (605) is fixedly welded to the bottom end of the rotating shaft (604). A second bevel gear (606) is meshed with the first bevel gear (605). A second threaded rod (607) is fixedly welded to the second bevel gear (606). The second threaded rod (607) is rotatably connected inside the storage frame (601). A first mounting block (608) is threadedly connected to the second threaded rod (607). The first mounting block (608) is limited and slidably connected inside the connecting frame (603). A displacement gauge (609) is bolted to the bottom of the first mounting block (608). A second mounting block (610) is fixedly connected to the displacement gauge (609). A pore pressure gauge (611) is bolted to the side end face of the second mounting block (610). A monitoring device (612) is fixedly installed on the top end face of the storage frame (601). The first hydraulic rods (602) are symmetrically distributed on both sides of the top of the connecting frame (603). The rotating shaft (604) is connected to the middle part of the connecting frame (603). The second bevel gears (606) are symmetrically distributed on both sides of the first bevel gear (605). The second bevel gears (606) correspond to the first mounting blocks (608) one by one through the second threaded rods (607). The second threaded rod (607) is connected to the middle part of the first mounting block (608).

6. The composite water-resisting layer bursting experiment device according to claim 5, characterized in that, A towing rope (613) is fixedly connected to the top end face of the connecting frame (603). The top of the towing rope (613) is wound around the coil (614). A driven shaft (615) is fixedly welded to the coil (614). The driven shaft (615) is rotatably connected to the storage frame (601). The towing ropes (613) are symmetrically distributed on both sides of the top of the connecting frame (603). The towing ropes (613) correspond to the driven shafts (615) one by one through the coil (614). A limiting frame (616) is fixedly welded to the inner wall of the storage frame (601). A scroll spring (617) is fixedly welded inside the limiting frame (616). The inner end of the scroll spring (617) is fixedly welded to the driven shaft (615).

7. The composite water-resisting layer bursting experiment device according to claim 6, wherein A push block (618) is fixedly welded on the driven shaft (615). A limiting rod (619) is fixedly welded on the outer wall of the storage frame (601). A return spring (620) is sleeved on the limiting rod (619). A push plate (621) is connected to the limiting rod (619) in a limited sliding manner. The bottom end of the return spring (620) is fixedly welded to the bottom end of the limiting rod (619). The top end of the return spring (620) is fixedly welded to the bottom end face of the push plate (621). The push plate (621) is slidably connected through the side end of the storage frame (601). A brush plate (622) is fixedly welded on the side end face of the push plate (621). A flexible brush (623) is fixedly connected to the brush plate (622). The push blocks (618) correspond to the driven shafts (615) one by one. The push blocks (618) are elliptical. The push plates (621) are symmetrically distributed on both sides of the storage frame (601). The push plates (621) correspond to the limiting rods (619) and the brush plates (622) one by one. The flexible brushes (623) are equidistantly distributed on the brush plate (622). The push plate (621) is fixed at the middle part of the top side end of the brush plate (622). The length of the limiting rod (619) is greater than the length of the push block (618).

8. A composite water-resisting layer bursting experiment device according to claim 1, characterized in that, An installation frame (10) is sleeved at the bottom of the sealing frame (8). A second connecting spring (11) is fixedly connected to the side end face of the installation frame (10). The other end of the second connecting spring (11) is fixedly welded with a second clamping rod (12). The second clamping rod (12) is slidably connected through the side end of the installation frame (10). The end of the second clamping rod (12) is clamped and connected in the second clamping groove (9). A filter screen frame (13) and a gauze screen frame (14) are fixedly connected to the inner bottom end face of the installation frame (10). A third threaded rod (15) is threadedly connected to the installation frame (10). The top end of the third threaded rod (15) is rotatably connected with a support plate (16). The support plate (16) is slidably connected in the filter screen frame (13). A telescopic sleeve frame (17) is fixedly welded to the bottom end face of the support plate (16). The bottom of the telescopic sleeve frame (17) is fixedly connected to the installation frame (10). A water pressure gauge (18) is installed on the support plate (16). The water pressure gauge (18) is slidably connected through the bottom of the installation frame (10).

9. The composite water-resisting layer bursting experiment device according to claim 8, characterized in that, The inner wall of the installation frame (10) is attached to the outer wall of the sealing frame (8). The outer wall of the gauze screen frame (14) is attached to the inner wall of the sealing frame (8). The third threaded rod (15) is connected to the central part of the bottom of the installation frame (10). The side end face of the support plate (16) is attached to the inner wall of the filter screen frame (13). Both the sealing frame (8) and the installation frame (10) are made of transparent materials. The first connecting pipe (22), the second connecting pipe (25), the third connecting pipe (26) and the fourth connecting pipe (28) are all rubber hoses.

10. A method for checking the outburst of a composite water-resisting layer, which uses the composite water-resisting layer outburst experimental device described in claim 1, is characterized in that, It includes the following steps: S1: The composite water - resistant layer consists of two layers of soil, namely the upper soil layer with a thickness of h1, a length of a, and a width of b, and the lower soil layer with a thickness of h2, a length of a, and a width of b; S2: Calculate the load of the underlying confined water: Pw = abHwYw, where Hw is the confined water head and Yw is the unit weight of water; S3: Calculate the self - weight of the soil: G = ab(h1y1 + h2y2), where h is the thickness of the water - resistant soil layer and y is the unit weight of the soil; S4: Calculate the shear stress on the side wall of the soil: Since the composite reinforced water - resistant layer has become two - layer soil, at this time, according to the calculation method of the earth - at - rest pressure of the soil, the earth - at - rest pressures of the two - layer soil should be calculated separately; σ 上层土体 = K1γh σ 下层土体 = K2∑γ × h where: K1, K2 are the coefficients of earth pressure at rest of the soil mass, generally taken as At this time, for the upper soil layer: For the lower soil layer: Considering the above loads and in accordance with the requirements of the safety factor in the "Technical Code for Building Foundation Pit Support", define the safety factor K of the foundation pit heave. At this time: In the above formula: a - is the width of the cross - section of the heaving soil in the transverse direction, b - is the length of the heaving soil h1 - is the thickness of the upper soil layer h2 - is the thickness of the lower soil layer γ1, γ2 - are the unit weights of the upper soil layer and the lower soil layer c1, c2 - are the cohesion of the upper soil layer and the lower soil layer, —— is the friction angle between the upper soil and the lower soil H w —— The piezometric head of confined water γ w —— the specific weight of water.

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