Water-rich sanding dolomite tunnel advance drainage pipe dewatering simulation test device

Abstract

This invention discloses a simulation test device for dewatering using advanced drainage pipes in water-rich sandy dolomite tunnels. The device includes a test chamber with a tunnel simulation block on it. The tunnel simulation block has a simulated tunnel excavation opening, and an advanced drainage pipe is inserted into the simulated tunnel excavation opening and into the tunnel simulation block. A pressurized water tank is fixed above the test chamber, and the pressurized water tank contains several pressure zones filled with crushed stone. A variable pressure plate is installed inside the pressurized water tank, which can individually change the water pressure within each of the crushed stone pressure zones. This invention simulates localized pressure difference changes during dewatering using advanced drainage pipes in water-rich sandy dolomite tunnels by controlling multi-point pressure differences, thus adapting to simulate extreme situations that may occur during dewatering using advanced drainage pipes in more water-rich sandy dolomite tunnels.

Description

Technical Field

[0001] This invention relates to the field of tunnel pre-drainage pipe dewatering simulation test, specifically to a pre-drainage pipe dewatering simulation test device applicable to water-rich sandy dolomite tunnels. Background Technology

[0002] Due to their great depth, long length, and complex geological conditions, deep and long tunnel projects encounter a series of special geological hazards during construction, such as weak and fractured zones, joint development, fault development, high ground stress, rock bursts, water inrush, mud inrush, sand inrush, high gas levels, and high ground temperatures. Among these, water inrush in karst tunnels is the most common and poses the greatest threat.

[0003] Currently, the research on dewatering strategies for advanced drainage pipes in water-rich sandy dolomite tunnels is not detailed enough in actual engineering. The relevant aspects of the dewatering need further exploration. Therefore, it is necessary to conduct experiments simulating dewatering through advanced drainage pipes in water-rich sandy dolomite tunnels to simulate various advanced drainage situations, thereby achieving the mature application of advanced drainage pipe dewatering in water-rich sandy dolomite tunnels. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies, which lack simultaneous multi-point test simulations, resulting in the immature development of the application of pre-drainage pipe dewatering in water-rich sandy dolomite tunnels. This invention provides a simulation test device suitable for pre-drainage pipe dewatering in water-rich sandy dolomite tunnels. By controlling the pressure difference at multiple points, it simulates the local pressure difference changes that occur during pre-drainage pipe dewatering in water-rich sandy dolomite tunnels, thereby adapting to the simulation of more extreme situations that occur during pre-drainage pipe dewatering in water-rich sandy dolomite tunnels.

[0005] The objective of this invention is mainly achieved through the following technical solutions:

[0006] A test device for simulating dewatering using advanced drainage pipes in water-rich sandy dolomite tunnels includes a test chamber. A tunnel simulation test block is mounted on the test chamber. A tunnel excavation simulation opening is formed on the tunnel simulation test block. An advanced drainage pipe is inserted into the tunnel excavation simulation opening and is inserted into the tunnel simulation test block. A pressurized water tank is fixed above the test chamber. The pressurized water tank contains several pressure zones filled with crushed stone.

[0007] The pressurized water tank is equipped with a variable pressure plate, which can change the water pressure in the crushed stone filling pressure zone.

[0008] Currently, when conducting simulation tests on pre-drainage pipes for dewatering in water-rich sandy dolomite tunnels, it is usually possible to simulate pre-drainage dewatering under the same working conditions. However, actual tunnel construction conditions are very complex and may even involve extreme changes. If these conditions cannot be accurately simulated during the simulation experiment, then there will be significant risks during construction. Existing technologies can only simulate single pressure conditions, and the types of working conditions that can be simulated are relatively limited. Therefore, the conclusions obtained from the experiments are also relatively limited. Based on this, how to simulate complex working conditions has become an urgent problem to be solved in the field of pre-drainage pipe dewatering simulation tests for tunnels.

[0009] In this embodiment, the test chamber is used to bear the test conditions, the tunnel simulation test block and the tunnel excavation simulation opening are used to simulate the actual working conditions of tunnel excavation, and the advanced drainage pipe is used to simulate drainage work under complex working conditions. Test data is observed and recorded, facilitating the analysis of advanced drainage and precipitation. To simulate complex working conditions, a pressurized water tank is installed above the test chamber. The pressurized water tank is used to inject water into the test chamber, thereby changing the water pressure inside the test chamber, facilitating the study of the impact of water pressure changes on the test chamber. The crushed stone filling pressure zone is used to simulate the damage caused to the tunnel by a sudden surge of water in the rock mass. The variable pressure plate in the pressurized water tank can simulate the situation where different points in the same tunnel are subjected to water with different pressures by changing the pressure in different crushed stone filling pressure zones. The variable pressure plate can effectively affect the water pressure at different points in the test chamber, thereby simulating the working condition when there are pressure differences at multiple points in the same tunnel. By setting different pressure levels at different points of the same tunnel model, this invention can simulate the actual working condition of pressure differences at multiple points, effectively reflecting the test results of pressure differences at multiple points when the tunnel is dewatered by the pre-drainage pipe, which facilitates proper research on this situation.

[0010] Furthermore, the pressurized water tank includes a tank shell, and the variable pressure plate is located inside the tank shell and divides the interior of the tank shell into two independent upper and lower parts;

[0011] The water tank shell is connected to several of the crushed stone filling pressure zones. The water tank shell is filled with pressurized water, which is located below the variable pressure plate.

[0012] In this embodiment, the water tank shell is used to bear the pressure of the pressurized water in the pressurized water tank, and the variable pressure plate is used to separate the pressurized water below the variable pressure plate, so that the variable pressure plate can apply pressure to the pressurized water, thereby causing the pressure in the crushed stone filling pressure zone to change. The crushed stone filling pressure zone is used to simulate the working condition changes in the rock mass. The pressurized water in the crushed stone filling pressure zone can effectively simulate the occurrence of water inrush. The variable pressure plate can pressurize the liquid in the crushed stone filling pressure zone by squeezing the space downward, and can effectively adjust the liquid level in each crushed stone filling pressure zone by tilting the variable pressure plate. Different pressures are applied to different crushed stone filling pressure zones by different liquid level heights, thereby causing the pressure in the crushed stone filling pressure zone to change, expressing more and more complex water inrush conditions.

[0013] Furthermore, one end of the variable pressure applying plate is provided with a first magnetic sliding track and can slide freely along the first magnetic sliding track, and the other end of the variable pressure applying plate is provided with a second magnetic sliding track and can slide freely along the second magnetic sliding track;

[0014] The variable pressure plate is retractable.

[0015] In this embodiment, one end of the variable pressure plate slides along the first magnetic sliding track, and the other end slides along the second magnetic sliding track, thereby enabling the variable pressure plate to squeeze or release the space where the pressurized water is located, thereby changing the pressure in the crushed stone filling pressure zone. The variable pressure plate is telescopic, and when the variable pressure plate is in an inclined position, it can affect the pressure in different crushed stone filling pressure zones by changing the liquid level.

[0016] Furthermore, the variable pressure plate includes an inner insert plate, one end of which is movably connected to the second magnetic sliding track, and the other end of which is inserted into an outer cover plate. A buffer spring is provided inside the outer cover plate, one end of which is fixed to the inner insert plate, and the other end of which is fixed to the outer cover plate.

[0017] In this embodiment, the inner insert plate can slide up and down under the action of the second magnetic sliding track through a movable connection with the second magnetic sliding track, and can change its angle. When the angle of the inner insert plate changes, the length of the variable pressure plate is changed by the extension and retraction of the inner insert plate within the outer plate, thereby changing the tilt angle of the variable pressure plate. When the tilt angle of the variable pressure plate changes, the liquid level height of different gravel filling pressure zones can be adjusted over a wider range, thereby enabling the gravel filling pressure zone to simulate more complex water inrush conditions.

[0018] Furthermore, the first magnetic sliding track includes a track bottom, on which a track groove is provided, and a magnetic slider is embedded in the track groove. One end of the track groove is provided with an upper electromagnetic block that can attract the magnetic slider, and the other end is provided with a lower electromagnetic block that can attract the magnetic slider.

[0019] The magnetism of the upper electromagnetic block and the lower electromagnetic block can be turned on independently;

[0020] The variable pressure plate is hinged to the magnetic slider.

[0021] The structure of the second magnetic sliding track is the same as that of the first magnetic sliding track.

[0022] In this embodiment, the track bottom is used to fix the track groove, the track groove is used to support the magnetic slider and accommodate the sliding of the magnetic slider, the upper electromagnetic block and the lower electromagnetic block are both electromagnets, the magnetic strength of the upper electromagnetic block and / or the lower electromagnetic block is adjusted by energizing the upper electromagnetic block and / or the lower electromagnetic block, thereby adjusting the position of the magnetic slider in the track groove through magnetic attraction reaction, thereby adjusting the specific position of the variable pressure plate, and achieving the purpose of adjusting the pressure of the pressurized water.

[0023] Furthermore, the test chamber includes a pressure chamber, and the crushed stone filling pressure zone is located inside the pressure chamber. The crushed stone filling pressure zone includes a first pressure zone, a second pressure zone, and a third pressure zone.

[0024] The first pressure zone, the second pressure zone, and the third pressure zone are all equipped with water supply pipes, which are connected to the pressurized water tank.

[0025] The water pressure in the first, second, and third pressure zones varies linearly.

[0026] (0026) In this embodiment of the application, the pressure tank is used to bear the pressure of pressurized water. The first pressure zone, the second pressure zone and the third pressure zone are adjacent to each other in sequence. By adjusting the tilt angle of the variable pressure plate, the pressure of the first pressure zone, the second pressure zone and the third pressure zone are changed. Since the liquid level changes linearly, the water pressure in the first pressure zone, the second pressure zone and the third pressure zone changes linearly.

[0027] Furthermore, a first liquid flow regulating component capable of agitating the fluid flow within the first and second pressure zones is provided between the first pressure zone and the second pressure zone, and a second liquid flow regulating component capable of agitating the fluid flow within the second and third pressure zones is provided between the second and third pressure zones.

[0028] In this embodiment, the first liquid flow regulating component is used to agitate the liquid flow between the first pressure zone and the second pressure zone, and the second liquid flow regulating component is used to agitate the liquid flow between the second pressure zone and the third pressure zone, thereby simulating the flow of liquid within the rock mass and making the simulated working conditions more complex.

[0029] Furthermore, the first liquid flow regulating component includes a first flow regulating box, which is located between the first pressure zone and the second pressure zone. The side of the first flow regulating box has a plurality of first connecting holes, which are respectively connected to the first pressure zone or the second pressure zone. The first liquid flow regulating box is provided with a first active swing plate that can swing freely within the first liquid flow regulating box.

[0030] The second liquid flow regulating component includes a second flow regulating box, which is located between the second pressure zone and the third pressure zone. The side of the second flow regulating box has a plurality of second connecting holes, which are respectively connected to the second pressure zone or the third pressure zone. The second liquid flow regulating box is provided with a second active swing plate that can swing freely within the second liquid flow regulating box.

[0031] In this embodiment, the first flow regulating tank is filled with pressurized water, which is connected to the first pressure zone or the second pressure zone through the first connecting hole. The first active swing plate swings in the first flow regulating tank, and the pressurized water is stirred by the swing, so that the pressurized water flows back and forth in the first pressure zone and the second pressure zone. Similarly, the second active swing plate in the second flow regulating tank stirs the pressurized water to flow back and forth in the second pressure zone and the third pressure zone.

[0032] Furthermore, the first active swing plate includes a plate body, the bottom of the first liquid flow regulating box is fixed with a slide rail bottom, an arc-shaped slide rail groove is fixed on the slide rail bottom, a drive slider is provided in the arc-shaped slide rail groove, one end of the plate body is hinged to the drive slider, and the other end is hinged to the inner wall of the first liquid flow regulating box.

[0033] The plate body divides the first liquid flow regulating box into two independent left and right parts, and the driving slider can drive the plate body to reciprocate along the arc-shaped sliding groove.

[0034] The second active swing plate has the same structure as the first active swing plate.

[0035] In this embodiment of the application, the first active swing plate has one end sliding along the arc-shaped slide rail groove, and the other end hinged to the first liquid flow regulating box, thus enabling the plate to swing back and forth. In this embodiment of the application, the radius of the arc surface of the arc-shaped slide rail groove is the same as the length of the plate, thereby enabling the plate to swing effectively along the arc-shaped slide rail groove. The driving slider can provide driving force for the reciprocating motion of the plate.

[0036] Furthermore, the drive slider is provided with a drive roller, and a track rope extending along its sliding direction is fixed on the arc-shaped slide rail groove. The track rope passes through the drive slider, and the drive roller abuts against the track rope.

[0037] In this embodiment, the drive roller moves along the track rope by abutting against it and rotating. When the drive roller reverses, it can change direction and move.

[0038] In summary, the present invention has the following advantages compared with the prior art:

[0039] (1) By setting different pressure values ​​at different points of the same tunnel model, the present invention can simulate the actual working condition of pressure difference at multiple points, effectively reflect the test results of pressure difference at multiple points when the tunnel advance drainage pipe is used for dewatering, and facilitate proper study of this situation.

[0040] (2) The pressure tank in this invention is used to bear the pressure of pressurized water. The first pressure zone, the second pressure zone and the third pressure zone are adjacent to each other in sequence. By adjusting the tilt angle of the variable pressure plate, the pressure of the first pressure zone, the second pressure zone and the third pressure zone can be changed. Since the liquid level changes linearly, the water pressure in the first pressure zone, the second pressure zone and the third pressure zone changes linearly.

[0041] (3) In the present invention, the first active swing plate has one end sliding along the arc-shaped slide rail groove and the other end hinged to the first liquid flow regulating box, so the reciprocating swing of the plate can be realized; in the embodiment of this application, the arc radius of the arc-shaped slide rail groove is the same as the length of the plate, so that the plate can effectively swing along the arc-shaped slide rail groove, and the driving slider can provide driving force for the reciprocating motion of the plate. Attached Figure Description

[0042] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0043] Figure 1 This is a schematic diagram of the structure of the present invention;

[0044] Figure 2 This is a cross-sectional view of the test chamber described in this invention;

[0045] Figure 3 For the present invention Figure 2 A magnified view of part A in the image;

[0046] Figure 4 For the present invention Figure 2 A magnified view of part B in the image;

[0047] Figure 5 This is a side sectional view of the present invention;

[0048] Figure 6 This is a schematic diagram of the variable pressure plate structure of the present invention;

[0049] The reference numerals in the attached drawings represent: 1. Pressurized water tank; 2. Test chamber; 3. Tunnel simulation test block; 4. Tunnel excavation simulation opening; 5. Advance drainage pipe; 11. Water tank shell; 12. Variable pressure plate; 121. Inner plate; 122. Outer plate; 123. Buffer spring; 13. Pressurized water; 14. First magnetic sliding track; 141. Upper electromagnetic block; 142. Track groove; 143. Track bottom; 144. Magnetic slider; 145. Lower electromagnetic block; 15. Second magnetic sliding track; 21. Bearing 22. Pressure chamber; 221. Crushed stone filling pressure zone; 222. First pressure zone; 222. Second pressure zone; 223. Third pressure zone; 23. Water supply pipe; 24. First liquid flow regulating component; 241. First connecting hole; 242. First active swing plate; 243. First flow regulating box; 2421. Arc-shaped slide rail groove; 2422. Slide rail bottom; 2423. Drive slider; 2424. Drive roller; 2425. Track rope; 2426. Plate; 25. Second liquid flow regulating component;

[0050] 251. Second connecting hole; 252. Second active swing plate; 253. Second flow regulating box. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0052] Example:

[0053] like Figures 1-6As shown, a test device for simulating dewatering through advanced drainage pipes in water-rich sandy dolomite tunnels includes a test chamber 2, a tunnel simulation test block 3 on the test chamber 2, a tunnel excavation simulation opening 4 on the tunnel simulation test block 3, an advanced drainage pipe 5 inserted into the tunnel excavation simulation opening 4, the advanced drainage pipe 5 inserted into the tunnel simulation test block 3, and a pressurized water tank 1 fixed above the test chamber 2, the pressurized water tank 1 having several crushed stone filling pressure zones 22.

[0054] The pressurized water tank 1 is equipped with a variable pressure plate 12, which can change the water pressure in the crushed stone filling pressure zone 22.

[0055] In practical application, this embodiment uses an advance drainage pipe 5 to pass through the tunnel simulation test block 3 from the tunnel excavation simulation opening 4, draining the pressurized water 13 in the crushed stone filling pressure zone 22. The pressure in several crushed stone filling pressure zones 22 is changed by tilting the variable pressure plate 12, thereby generating different pressures at different points in the crushed stone filling pressure zone 22. When performing advance drainage, the pressure at different points will produce more complex working conditions, which is beneficial for this embodiment to simulate more complex water inrush situations. The simulation test of this embodiment can make actual construction safer.

[0056] Considering that the water pressure in the actual tunnel rock mass cannot reach the pressure value inside the high-pressure container, this embodiment does not use equipment such as a pressure pump to increase the pressure of the crushed stone filling pressure zone 22. Instead, the variable pressure plate 12 is used to squeeze the space to increase the pressure. Although the pressure that can be increased is limited, it is more in line with the actual working conditions in the tunnel rock mass and can more obviously simulate the changes in the tunnel rock mass encountered in actual construction.

[0057] The pressurized water tank 1 includes a tank shell 11, and the variable pressure plate 12 is located inside the tank shell 11 and divides the interior of the tank shell 11 into two independent upper and lower parts.

[0058] The water tank shell 11 is connected to several of the crushed stone filling pressure zones 22. The water tank shell 11 is filled with pressurized water 13, which is located below the variable pressure plate 12.

[0059] One end of the variable pressure plate 12 is provided with a first magnetic sliding track 14 and can slide freely along the first magnetic sliding track 14; the other end of the variable pressure plate 12 is provided with a second magnetic sliding track 15 and can slide freely along the second magnetic sliding track 15.

[0060] The variable pressure plate 12 is telescopic.

[0061] The variable pressure plate 12 includes an inner plate 121. One end of the inner plate 121 is movably connected to the second magnetic sliding track 15, and the other end is inserted into the outer plate 122. The outer plate 122 is provided with a buffer spring 123. One end of the buffer spring 123 is fixed to the inner plate 121, and the other end is fixed to the outer plate 122.

[0062] The first magnetic sliding track 14 includes a track bottom 143, a track groove 142 on the track bottom 143, a magnetic slider 144 embedded in the track groove 142, an upper electromagnetic block 141 capable of attracting the magnetic slider 144 at one end of the track groove 142, and a lower electromagnetic block 145 capable of attracting the magnetic slider 144 at the other end.

[0063] The magnetism of the upper electromagnetic block 141 and the lower electromagnetic block 145 can be turned on independently.

[0064] The variable pressure plate 12 is hinged to the magnetic slider 144;

[0065] The structure of the second magnetic sliding track 15 is the same as that of the first magnetic sliding track 14.

[0066] In this embodiment, the track bottom 143 is used to fix the track groove 142, and the track groove 142 is used to support the magnetic slider and accommodate the sliding of the magnetic slider 144. The upper electromagnetic block 141 and the lower electromagnetic block 145 are both electromagnets. By energizing the upper electromagnetic block 141 and / or the lower electromagnetic block 145, the magnetic strength of the upper electromagnetic block 141 and / or the lower electromagnetic block 145 is adjusted, thereby adjusting the position of the magnetic slider 144 in the track groove 142 through magnetic attraction, thereby adjusting the specific position of the variable pressure plate 12, and achieving the purpose of adjusting the pressure of the pressurized water 13.

[0067] The test chamber 2 includes a pressure chamber 21, and the crushed stone filling pressure zone 22 is located inside the pressure chamber 21. The crushed stone filling pressure zone 22 includes a first pressure zone 221, a second pressure zone 222 and a third pressure zone 223.

[0068] The first pressure zone 221, the second pressure zone 222 and the third pressure zone 223 are all equipped with water supply pipes 23, and the water supply pipes 23 are connected to the pressurized water tank 1;

[0069] The water pressure in the first pressure zone 221, the second pressure zone 222, and the third pressure zone 223 varies linearly.

[0070] A first liquid flow regulating component 24 capable of agitating the fluid flow within the first pressure zone 221 and the second pressure zone 222 is provided between the first pressure zone 221 and the second pressure zone 222, and a second liquid flow regulating component 25 capable of agitating the fluid flow within the second pressure zone 222 and the third pressure zone 223 is provided between the second pressure zone 222 and the third pressure zone 223.

[0071] The first liquid flow regulating component 24 includes a first flow regulating box 243, which is located between the first pressure zone 221 and the second pressure zone 222. The side of the first flow regulating box 243 has a plurality of first connecting holes 241, which are respectively connected to the first pressure zone 221 or the second pressure zone 222. The first liquid flow regulating box is provided with a first active swing plate 242 that can swing freely within the first liquid flow regulating box.

[0072] The second liquid flow regulating assembly 25 includes a second flow regulating housing 253, which is located between the second pressure zone 222 and the third pressure zone 223. The side of the second flow regulating housing 253 has a plurality of second connecting holes 251, which are respectively connected to the second pressure zone 222 or the third pressure zone 223. The second liquid flow regulating housing is provided with a second active swing plate 252 that can swing freely within the second liquid flow regulating housing.

[0073] In this embodiment, the crushed stone filling pressure zone 22 is subdivided into a first pressure zone 221, a second pressure zone 222, and a third pressure zone 223. At the start of the test, the entire crushed stone filling pressure zone 22 is pressurized by pressing down the variable pressure plate 12. The pressing down of the variable pressure plate 12 is achieved by energizing the lower electromagnetic block 145, increasing its magnetism, and attracting the variable pressure plate 12. When it is necessary to change the pressure conditions of the first pressure zone 221, the second pressure zone 222, and the third pressure zone 223 respectively, the magnetism of the lower electromagnetic block 145 and the upper electromagnetic block 141 within the first magnetic sliding track 14 and the second magnetic sliding track 15 is adjusted, causing the variable pressure plate 12 to tilt. The two ends of the variable pressure plate 12 are respectively connected to… The magnetic slider 144 of the first magnetic sliding track 14 or the second magnetic sliding track 15 is hinged, so the variable pressure plate 12 can be tilted. The variable pressure plate 12 can change its length by extending and retracting the inner plate 121 and the outer plate 122, so that the variable pressure plate 12 can adapt to different tilt angles. When the tilt angle of the variable pressure plate 12 changes, the liquid level of the pressurized water 13 is different in the first pressure zone 221, the second pressure zone 222 and the third pressure zone 223. The pressure conditions in the crushed stone filling pressure zone 22 change, and the advanced drainage situation of the tunnel simulation also changes. This allows for the simulation of more complex construction conditions and can effectively reflect more extreme construction conditions, thereby facilitating the improvement of safety measures and achieving a higher standard of safe construction.

[0074] The first liquid flow regulating component 24 and the second liquid flow regulating component 25 in this embodiment can effectively agitate and flow the fluid in the first pressure zone 221, the second pressure zone 222 and the third pressure zone 223, thereby simulating the effect of fluid undercurrent on pre-drainage under pressurization. Combined with the pressure difference of different liquid levels, it can more clearly simulate the actual water inrush situation in the tunnel rock mass, and maximize the complexity and limit of the test conditions, so that the test results are more referential.

[0075] This embodiment aims to simulate a tunnel pre-drainage pipe dewatering simulation test under complex working conditions. It does not mean that this embodiment can replace the conventional tunnel pre-drainage pipe dewatering simulation test. In practical applications, it can be used for supplementary reference or extreme complex safety verification.

[0076] The first active swing plate 242 includes a plate body 2426. The bottom of the first flow regulating box 243 is fixed with a slide rail bottom 2422. An arc-shaped slide rail groove 2421 is fixed on the slide rail bottom 2422. A drive slider 2423 is provided in the arc-shaped slide rail groove 2421. One end of the plate body 2426 is hinged to the drive slider 2423, and the other end is hinged to the inner wall of the first liquid flow regulating box.

[0077] The plate 2426 divides the first flow regulating box 243 into two independent parts, and the driving slider 2423 can drive the plate 2426 to reciprocate along the arc-shaped sliding groove.

[0078] The second active swing plate 252 has the same structure as the first active swing plate 242.

[0079] The drive slider 2423 is provided with a drive roller 2424, and a track rope 2425 extending along its sliding direction is fixed on the arc-shaped slide rail groove 2421. The track rope 2425 passes through the drive slider 2423, and the drive roller 2424 abuts against the track rope 2425.

[0080] In this embodiment, the first active swing plate 242 has one end of the plate body 2426 sliding along the arc-shaped slide rail groove 2421, and the other end of the plate body 2426 hinged to the first flow adjustment box 243, thus enabling the plate body 2426 to reciprocate. In this embodiment, the arc radius of the arc surface of the arc-shaped slide rail groove 2421 is the same as the length of the plate body 2426, thereby enabling the plate body 2426 to effectively swing along the arc-shaped slide rail groove 2421. The driving slider 2423 can provide driving force for the reciprocating motion of the plate body 2426. The driving roller 2424 moves along the track rope 2425 by abutting against the track rope 2425 and rotating. When the driving roller 2424 reverses, it can change direction and move.

[0081] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A test device for simulating dewatering through advanced drainage pipes in water-rich sandy dolomite tunnels, comprising a test chamber (2), wherein a tunnel simulation test block (3) is provided on the test chamber (2), a tunnel excavation simulation opening (4) is provided on the tunnel simulation test block (3), an advanced drainage pipe (5) is inserted into the tunnel excavation simulation opening (4), and the advanced drainage pipe (5) is inserted into the tunnel simulation test block (3), characterized in that, A pressurized water tank (1) is fixed above the test chamber (2), and several gravel filling pressure zones (22) are provided below the pressurized water tank (1); The pressurized water tank (1) is equipped with a variable pressure plate (12), which can change the water pressure in the crushed stone filling pressure zone (22) respectively; The pressurized water tank (1) includes a tank shell (11), and the variable pressure plate (12) is located inside the tank shell (11) and divides the interior of the tank shell (11) into two independent upper and lower parts; The water tank shell (11) is connected to several of the crushed stone filling pressure zones (22). The water tank shell (11) is filled with pressurized water (13), which is located below the variable pressure plate (12). One end of the variable pressure plate (12) is provided with a first magnetic sliding track (14) and can slide freely along the first magnetic sliding track (14); the other end of the variable pressure plate (12) is provided with a second magnetic sliding track (15) and can slide freely along the second magnetic sliding track (15). The variable pressure plate (12) is telescopic; The test chamber (2) includes a pressure chamber (21), and the crushed stone filling pressure zone (22) is located inside the pressure chamber (21). The crushed stone filling pressure zone (22) includes a first pressure zone (221), a second pressure zone (222), and a third pressure zone (223). The first pressure zone (221), the second pressure zone (222) and the third pressure zone (223) are all equipped with water supply pipes (23), and the water supply pipes (23) are connected to the pressurized water tank (1); The water pressure in the first pressure zone (221), the second pressure zone (222), and the third pressure zone (223) varies linearly; A first liquid flow regulating component (24) capable of agitating the fluid flow in the first pressure zone (221) and the second pressure zone (222) is provided between the first pressure zone (221) and the second pressure zone (222), and a second liquid flow regulating component (25) capable of agitating the fluid flow in the second pressure zone (222) and the third pressure zone (223) is provided between the second pressure zone (222) and the third pressure zone (223).

2. The simulation test device for pre-drainage pipe dewatering in water-rich sandy dolomite tunnels according to claim 1, characterized in that, The variable pressure plate (12) includes an inner plate (121), one end of which is movably connected to the second magnetic sliding track (15), and the other end of which is inserted into an outer plate (122). A buffer spring (123) is provided inside the outer plate (122), one end of which is fixed to the inner plate (121), and the other end of which is fixed to the outer plate (122).

3. The simulation test device for pre-drainage pipe dewatering in water-rich sandy dolomite tunnels according to claim 1, characterized in that, The first magnetic sliding track (14) includes a track bottom (143), a track groove (142) is provided on the track bottom (143), a magnetic slider (144) is embedded in the track groove (142), an upper electromagnetic block (141) is provided at one end of the track groove (142) to attract the magnetic slider (144), and a lower electromagnetic block (145) is provided at the other end to attract the magnetic slider (144); The magnetism of the upper electromagnetic block (141) and the lower electromagnetic block (145) can be turned on independently; The variable pressure plate (12) is hinged to the magnetic slider (144); The structure of the second magnetic sliding track (15) is the same as that of the first magnetic sliding track (14).

4. The simulation test device for pre-drainage pipe dewatering in water-rich sandy dolomite tunnels according to claim 1, characterized in that, The first liquid flow regulating component (24) includes a first flow regulating box (243), which is located between the first pressure zone (221) and the second pressure zone (222). The side of the first flow regulating box (243) has a plurality of first connecting holes (241), which are respectively connected to the first pressure zone (221) or the second pressure zone (222). The first flow regulating box is provided with a first active swing plate (242) that can swing freely within the first flow regulating box. The second liquid flow regulating component (25) includes a second flow regulating box (253), which is located between the second pressure zone (222) and the third pressure zone (223). The side of the second flow regulating box (253) has a plurality of second connecting holes (251), which are respectively connected to the second pressure zone (222) or the third pressure zone (223). The second flow regulating box is provided with a second active swing plate (252) that can swing freely within the second flow regulating box.

5. The simulation test device for pre-drainage pipe dewatering in water-rich sandy dolomite tunnels according to claim 4, characterized in that, The first active swing plate (242) includes a plate body (2426), a slide rail bottom (2422) is fixed at the bottom of the first flow regulating box, an arc-shaped slide rail groove (2421) is fixed on the slide rail bottom (2422), a drive slider (2423) is provided in the arc-shaped slide rail groove (2421), one end of the plate body (2426) is hinged to the drive slider (2423), and the other end is hinged to the inner wall of the first flow regulating box; The plate (2426) divides the first flow regulating box into two independent parts, and the driving slider (2423) can drive the plate (2426) to reciprocate along the arc-shaped slide rail groove; The second active swing plate (252) has the same structure as the first active swing plate (242).

6. The simulation test device for pre-drainage pipe dewatering in water-rich sandy dolomite tunnels according to claim 5, characterized in that, The drive slider (2423) is provided with a drive roller (2424), and a track rope (2425) extending along its sliding direction is fixed on the arc-shaped slide rail groove (2421). The track rope (2425) passes through the drive slider (2423), and the drive roller (2424) abuts against the track rope (2425).

Images