Tunnel excavation groundwater environment influence evaluation simulation device

Abstract

The invention discloses a tunnel excavation groundwater environment influence evaluation simulation device which comprises a simulation box, a sealing plug is connected to an inner cavity of a water inlet hole in a threaded and inserted mode, the simulation box is provided with a simulation mechanism, an adjusting mechanism is arranged at the bottom of the simulation box, and a moving mechanism used for carrying and assisting the simulation box is arranged on the side portion of the adjusting mechanism. A limiting mechanism used for locking different positions of the moving mechanism is arranged on the side portion of the adjusting mechanism, the adjusting mechanism comprises a supporting plate and a limiting plate, and an adjusting plate is arranged outside the supporting plate in a sliding mode. Through the arrangement mode that the simulation box, the supporting plate, the adjusting plate, the limiting plates, the operation frames, the linkage frame and the series connection rods are matched, the series connection rods enable the adjacent bearing legs to be connected in series, the linkage frame enables the two operation frames to move at the same time, the operation frames pull the multiple limiting plates to move at the same time, the operation height of the simulation box can be adjusted, and the operation efficiency is improved. Therefore, the device is suitable for working personnel with different heights to operate and use.

Description

Technical Field

[0001] The invention relates to the field of tunnel excavation groundwater environment simulation, and in particular to a tunnel excavation groundwater environment impact assessment simulation device. Background Art

[0002] When tunnel excavation is in progress, it is usually necessary to simulate the groundwater environment, and then evaluate the groundwater environment based on the simulation results to ensure the safety of tunnel excavation. Tunnel excavation groundwater environment simulation devices are used. There are various types of tunnel excavation groundwater environment simulation devices, including groundwater flow simulation devices, which provide a basis for understanding the dynamic changes of groundwater and predicting the impact of excavation activities on groundwater.

[0003] The groundwater flow simulation device in the prior art usually includes a simulation box, a simulation mechanism and support legs, etc., so that the flow model is placed inside the simulation box, the simulation mechanism is located on the side of the simulation box, the support legs are located at the bottom of the simulation box, and a plurality of water inlet holes are opened on the side of the simulation box. The simulation mechanism includes a screw, a water receiving block, a moving block, a water inlet box, a support and a pump body, etc. The pump body and the water inlet box are installed on the side of the simulation box, the screw is rotatably connected to the support, the moving block is fixedly connected to the water receiving block, the screw causes the moving block to move vertically, thereby driving the water receiving block to correspond to the inside of the corresponding water inlet hole, and then the pump body pumps the groundwater inside the water tank, so that the groundwater enters the simulation box from the inside of the water inlet hole, and then the transparency of the simulation box is used to simulate the flow of groundwater.

[0004] When performing simulation operations, the simulation box and supporting legs are usually placed in specified positions, but the supporting legs are usually of fixed size, so the height of the simulation box is certain. However, when operating the model inside the simulation box, workers of different heights usually have different operating heights, resulting in inconvenience in use. As a result, the groundwater flow simulation device is not convenient for adjusting the operating height of the simulation box according to needs. Summary of the invention

[0005] The purpose of the present invention is to provide a tunnel excavation groundwater environmental impact assessment simulation device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a tunnel excavation groundwater environmental impact assessment simulation device, comprising:

[0007] A simulation box, wherein a water inlet hole is provided on the side of the inner wall of the simulation box, and a sealing plug is inserted and connected through the inner cavity thread of the water inlet hole;

[0008] The simulation box is provided with a simulation mechanism on the side, the simulation box is provided with an adjustment mechanism for placing the simulation box at different heights on the bottom, the adjustment mechanism is provided with a moving mechanism for assisting the transport of the simulation box on the side, the adjustment mechanism is provided with a limiting mechanism for locking the moving mechanism at different positions on the side, and the adjustment mechanism includes:

[0009] A support plate, an adjustment plate is slidably provided on the outside of the support plate, and a load-bearing leg is fixedly connected to the bottom end of the adjustment plate;

[0010] The limiting plate is slidably arranged on the side of the supporting plate.

[0011] Preferably, the adjustment mechanism further comprises:

[0012] An operating frame, wherein the side of the operating frame is fixedly connected to the limiting plate, the side of the adjusting plate is provided with a first sliding groove, the side of the supporting plate is provided with first clamping grooves at equal intervals, and the limiting plate is slidably interlaced with the inner cavity of the first sliding groove and the first clamping groove;

[0013] A linkage frame, the bottom ends of which are fixedly connected to the two operating frames respectively;

[0014] A series rod is fixedly connected between adjacent load-bearing legs, and the bottom end of each load-bearing leg is fixedly connected with a bottom plate.

[0015] Preferably, a second slide groove is opened at the top of the adjustment plate, the support plate is slidably and interlacedly connected with the inner cavity of the second slide groove, the bottom end of the adjustment plate is fixedly connected with a fixed frame, a sliding frame is slidably arranged inside the fixed frame, and the side of the sliding frame is fixedly connected with the operating frame.

[0016] Preferably, a round rod is fixedly connected to the side of the inner wall of the sliding frame, a square plate is embedded in the inner cavity of the fixed frame, the outer wall of the round rod is slidably and interlacedly connected with the square plate, a first spring is sleeved on the outside of the round rod, one end of the first spring is fixedly connected to the sliding frame, and the other end of the first spring is fixedly connected to the square plate, auxiliary plates are symmetrically fixedly connected to the sides of the load-bearing legs, auxiliary wheels are rotatably connected between adjacent auxiliary plates, a third slide groove is opened on the other side of the support plate, and the side of the auxiliary wheel is located inside the third slide groove.

[0017] Preferably, the simulation mechanism comprises:

[0018] A water tank, the water tank is fixedly connected to the side of the simulation box, and a connecting pipe is fixedly sleeved on the top of the water tank;

[0019] A water inlet block, one end of the connecting pipe is fixedly sleeved on the side of the water inlet block, and the side of the water inlet block corresponds to the inner cavity of the water inlet hole;

[0020] A moving block, the side of which is fixedly connected to the water inlet block, a screw rod is inserted through the top thread of the moving block, a support is fixedly connected to the side of the simulation box, and the screw rod is rotatably connected to the support member.

[0021] Preferably, the moving mechanism comprises:

[0022] A support column, wherein the bottom end of the support column is fixedly connected with a universal wheel;

[0023] A guide frame, the side of which is fixedly connected to the support column, and the bearing legs are slidably and interlacedly connected to the inner cavity of the guide frame.

[0024] Preferably, the limiting mechanism comprises:

[0025] An introduction frame, the bottom end of which is fixedly connected to the support column;

[0026] A positioning post is slidably and interlacedly connected with the inner cavity of the introduction frame.

[0027] Preferably, the limiting mechanism further includes:

[0028] An assembly cylinder, wherein a support cylinder is arranged on the side of the assembly cylinder, a threaded cylinder is fixedly connected to the side of the support cylinder, an annular groove is opened on the side of the assembly cylinder, and the threaded cylinder is threadedly connected with the inner cavity of the annular groove;

[0029] A sliding rod, one end of which is threadedly connected to the side of the positioning column.

[0030] Preferably, two second slots are provided on the side of the bearing leg, the positioning column is slidably and interlacedly connected with the inner cavity of the second slot, and the positioning column is slidably and interlacedly connected with the inner cavity of the supporting tube.

[0031] Preferably, a pulling plate is provided on the other side of the assembly cylinder, and the side of the pulling plate is fixedly connected to the sliding rod. A circular groove matching the sliding rod is opened on the other side of the assembly cylinder, and a second spring is sleeved on the outside of the sliding rod. One end of the second spring fits with the positioning column, and the other end of the second spring fits with the inner wall of the support cylinder.

[0032] Technical effects and advantages of the present invention:

[0033] (1) The present invention utilizes a simulation box, a support plate, an adjustment plate, a load-bearing leg, a limit plate, an operating frame, a linkage frame and a series rod to coordinate the arrangement. The series rod connects adjacent load-bearing legs in series, the linkage frame enables two operating frames to move simultaneously, the operating frame simultaneously pulls a plurality of limit plates to move simultaneously, and the limit plates limit the relative positions of the adjustment plate and the support plate, thereby facilitating the adjustment of the operating height of the simulation box to adapt to the operation of workers of different heights and facilitate operation.

[0034] (2) The present invention utilizes a configuration in which a support column, a universal wheel and a guide frame cooperate with each other. The support column supports the universal wheel, and the universal wheel supports the load-bearing leg. The guide frame vertically guides the sliding of the support column, thereby facilitating the movement of the simulation box and making it easy to move the simulation box to a designated position for use.

[0035] (3) The present invention utilizes a configuration in which an introduction frame, a sliding rod, a positioning column, a support tube, a second spring and a pulling plate are coordinated. The pulling plate simultaneously pulls two positioning columns in the same row to move. The positioning columns limit the relative positions of the introduction frame and the load-bearing legs, which is beneficial for limiting the two different positions of the moving column, making it easier to store and use the universal wheel, and increasing the stability of the simulation box during use and the convenience of moving and transporting. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0037] Figure 2 It is a schematic diagram of the front structure of the present invention.

[0038] Figure 3 It is a front cross-sectional structural schematic diagram of the present invention.

[0039] Figure 4 It is a front cross-sectional structural schematic diagram of the adjustment plate of the present invention.

[0040] Figure 5 It is a front cross-sectional structural schematic diagram of the support tube of the present invention.

[0041] Figure 6 For the present invention Figure 1 Enlarged structural diagram at A in the middle.

[0042] In the figure: 1. simulation box; 2. simulation mechanism; 21. water tank; 22. water inlet block; 23. moving block; 24. screw; 25. connecting pipe; 3. adjusting mechanism; 31. support plate; 32. adjusting plate; 33. load-bearing leg; 34. limiting plate; 35. operating frame; 36. fixed frame; 37. sliding frame; 38. first spring; 39. square plate; 310. bottom plate; 311. auxiliary wheel; 312. linkage frame; 313. series rod; 4. moving mechanism; 41. support column; 42. universal wheel; 43. guide frame; 5. limiting mechanism; 51. introduction frame; 52. positioning column; 53. support cylinder; 54. second spring; 55. pulling plate. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] The present invention provides Figure 1-6 A tunnel excavation groundwater environmental impact assessment simulation device is shown, comprising a simulation box 1, a water inlet hole is provided on the side of the inner wall of the simulation box 1, which is conducive to the entry of groundwater into the interior of the simulation box 1, and the interior of the simulation box 1 contains a tunnel excavation underground model, which is conducive to the entry of groundwater into the interior of the simulation box 1 to simulate the tunnel excavation groundwater environment. The simulation box 1 is a transparent box, and the inner cavity of the water inlet hole is threadedly connected with a sealing plug, which is conducive to sealing the interior of the water inlet hole.

[0045] Specifically, the bottom of the simulation box 1 is provided with an adjustment mechanism 3 for placing the simulation box 1 at different heights. The adjustment mechanism 3 includes a support plate 31, a limit plate 34, an operating frame 35, a linkage frame 312 and a series rod 313. The support plate 31 is conducive to supporting the simulation box 1. The limit plate 34 is conducive to limiting the relative position of the adjustment plate 32 and the support plate 31, and thus is conducive to adjusting the operating height of the simulation box 1 to adapt to the operation of staff of different heights. The operating frame 35 is in an I-shape, and the operating frame 35 is conducive to simultaneously pulling the two limit plates 34 in the same row to move, so as to facilitate the pulling operation of the limit plates 34. The linkage frame 312 is in a U-shape, and the linkage frame 312 is conducive to simultaneously moving the two operating frames 35. The cam 313 is convenient for simultaneously moving a plurality of limit plates 34 so as to perform a pulling operation on the plurality of limit plates 34. The series rod 313 is conducive to connecting two adjacent load-bearing legs 33 in series so that the two adjacent load-bearing legs 33 can move simultaneously. An adjustment plate 32 is slidingly arranged on the outside of the support plate 31, which is conducive to sliding on the support plate 31 and supporting the load-bearing legs 33, so as to facilitate adjusting the height of the simulation box 1. The bottom end of the adjustment plate 32 is fixedly connected with the load-bearing legs 33, which is conducive to supporting the simulation box 1. The limit plate 34 is slidingly arranged on the side of the support plate 31, and the side of the operating frame 35 is fixedly connected to the limit plate 34. A first sliding groove is provided on the side of the adjustment plate 32, and a first card groove is equidistantly provided on the side of the support plate 31. The bottom ends of the linkage frame 312 are respectively fixedly connected to the two operating frames 35, and the serial rod 313 is fixedly connected between the adjacent load-bearing legs 33. The bottom ends of the load-bearing legs 33 are fixedly connected with the bottom plate 310, which is beneficial to increase the contact area between the load-bearing legs 33 and the ground. The top of the adjustment plate 32 is provided with a second slide groove, and the support plate 31 is slidably connected with the inner cavity of the second slide groove. The bottom end of the adjustment plate 32 is fixedly connected with a fixed frame 36, which is beneficial to make the sliding frame 37 slide therein, so as to facilitate the sliding support of the sliding frame 37. The internal sliding of the fixed frame 36 is provided with a sliding frame 37, and the sliding frame 37 is L-shaped. The sliding frame 37 is beneficial to drive the operating frame 35 to move, so as to facilitate the operation The frame 35 is pulled, the side of the sliding frame 37 is fixedly connected to the operating frame 35, and the side of the inner wall of the sliding frame 37 is fixedly connected with a round rod, which is conducive to guiding the deformation of the first spring 38. The inner cavity of the fixed frame 36 is embedded with a square plate 39, which is conducive to the sliding of the round rod thereon, and is also conducive to the sliding support of the round rod. The outer wall of the round rod is slidably interlaced with the square plate 39, and the outer side of the round rod is sleeved with a first spring 38. The elastic force of the first spring 38 is conducive to pushing the sliding frame 37 to move, so that the sliding frame 37 and the operating frame 35 can be restored to their original positions after movement, and the operating frame 35 and the limit plate 34 can be restored to their original positions after movement, so as to facilitate repeated operation of the limit plate 34. One end of the first spring 38 is fixedly connected to the sliding frame 37.The other end of the first spring 38 is fixedly connected to the square plate 39, and the side of the load-bearing leg 33 is symmetrically fixedly connected with an auxiliary plate, and an auxiliary wheel 311 is rotatably connected between adjacent auxiliary plates, which is conducive to vertical support for the sliding of the load-bearing leg 33 to increase the support stability of the simulation box 1. The other side of the support plate 31 is provided with a third slide groove, and the side of the auxiliary wheel 311 is located inside the third slide groove.

[0046] Specifically, a simulation mechanism 2 is provided on the side of the simulation box 1, and the simulation mechanism 2 includes a water tank 21, a water inlet block 22 and a moving block 23. The water tank 21 is conducive to containing groundwater extracted by tunnel excavation. A pump body is installed on the water tank 21, which is conducive to allowing the groundwater inside the water tank 21 to enter the interior of the simulation box 1 through the connecting pipe 25, the water inlet block 22 and the inner cavity of the water inlet hole to simulate the flow of groundwater. A drainage hole is provided inside the water inlet block 22, and the inner cavity of the drainage hole corresponds to the inner cavity of the water inlet hole, which is conducive to transporting groundwater. The moving block 23 is conducive to driving the water inlet block 22 to enter the water inlet block 22. The moving block 23 is fixedly connected to the water inlet block 22, and the top of the moving block 23 is threadedly connected with a screw 24, which is conducive to driving the moving block 23 to move up and down, and then conducive to driving the water inlet block 22 to move up and down. The side of the simulation box 1 is fixedly connected with a supporting member, and the screw 24 is rotatably connected to the supporting member.

[0047] Specifically, a moving mechanism 4 for assisting the transportation of the simulation box 1 is provided on the side of the adjustment mechanism 3. The moving mechanism 4 includes a support column 41 and a guide frame 43. The bottom end of the support column 41 is fixedly connected with a universal wheel 42, which is conducive to moving the simulation box 1 so as to carry the simulation box 1. The support column 41 is conducive to supporting the universal wheel 42 and driving the universal wheel 42 to move. The guide frame 43 is conducive to guiding the vertical sliding of the support column 41 to increase the stability of the movement of the support column 41. The side of the guide frame 43 is fixedly connected to the support column 41, and the load-bearing leg 33 is slidably and interlacedly connected with the inner cavity of the guide frame 43.

[0048] Specifically, the side of the adjustment mechanism 3 is provided with a limiting mechanism 5 for locking the moving mechanism 4 at different positions. The limiting mechanism 5 includes an introduction frame 51, a positioning column 52, an assembly cylinder and a sliding rod. The introduction frame 51 is conducive to the sliding of the positioning column 52 inside it, which is convenient for sliding support of the positioning column 52. The positioning column 52 is conducive to limiting the relative position of the introduction frame 51 and the load-bearing leg 33, so as to store and fix the universal wheel 42 for use, which is convenient for operation. The assembly cylinder is conducive to connecting with the support cylinder 53, and the sliding rod is conducive to pulling the positioning column 52 for movement, which is convenient for disengaging the positioning column 52 from the load-bearing leg 33. The bottom end of the introduction frame 51 is fixedly connected to the support column 41, and the positioning column 52 is slidably and interlacedly connected with the inner cavity of the introduction frame 51. The side of the assembly cylinder is provided with a supporting cylinder 53, which is conducive to sliding support of the sliding rod. The side of the supporting cylinder 53 is fixedly connected with a threaded cylinder, which is conducive to connecting the supporting cylinder 53 with the assembly cylinder, which is convenient for installing the supporting cylinder 53 The side of the assembly cylinder is provided with an annular groove, and the threaded cylinder is threadedly inserted and connected with the inner cavity of the annular groove. One end of the sliding rod is threadedly inserted and connected with the side of the positioning column 52. The side of the load-bearing leg 33 is provided with two second slots, and the positioning column 52 is slidably inserted and connected with the inner cavity of the second slot, and the positioning column 52 is slidably inserted and connected with the inner cavity of the support cylinder 53. A pulling plate 55 is provided on the other side of the assembly cylinder, which is conducive to pulling the two sliding rods in the same row to move at the same time, and it is convenient to pull the two positioning columns 52 in the same row to move at the same time. The side of the pulling plate 55 is fixedly connected to the sliding rod, and a circular groove matching the sliding rod is provided on the other side of the assembly cylinder. The outer sleeve of the sliding rod is provided with a second spring 54. The elastic force of the second spring 54 is conducive to pushing the positioning column 52 to move, so that the positioning column 52 can be restored to its original position after movement, so as to facilitate repeated operation of the positioning column 52. One end of the second spring 54 is in contact with the positioning column 52, and the other end of the second spring 54 is in contact with the inner wall of the support cylinder 53.

[0049] Working principle of the present invention:

[0050] When it is necessary to simulate the flow of underground water in tunnel excavation, the operating height of the simulation box 1 is first adjusted according to the needs, and the operating frame 35 on the right is pulled, and the operating frame 35 pulls the linkage frame 312 and the sliding frame 37 to move, and the linkage frame 312 makes the two operating frames 35 move at the same time, and the operating frame 35 simultaneously pulls a plurality of limit plates 34 to move, and the limit plates 34 are disengaged from the inside of the first card slot at this position, and the position limit of the adjustment plate 32 and the support plate 31 is released, and then the support plate 31 is slid on the adjustment plate 32. The operating frame 35 moves, and at the same time, the operating frame 35 pulls the sliding frame 37 to move, and the sliding frame 37 compresses the first spring 38, and the first spring 38 generates elastic force on the sliding frame 37, thereby adjusting the operating height of the simulation box 1. After the position is determined, the operating frame 35 is released, and the elastic force of the compressed first spring 38 pushes the sliding frame 37 to return to the original position, thereby making the limiting plate 34 interspersed with the inside of the first card slot at the corresponding position, so as to limit the relative position of the support plate 31 and the adjustment plate 32, and complete the height adjustment of the simulation box 1;

[0051] Then, when the simulation box 1 needs to be moved, the pulling plate 55 is pulled, so that the pulling plate 55 simultaneously pulls the two sliding rods in the same row to move, and the sliding rod drives the positioning column 52 to move, so that the positioning column 52 limits the relative position of the introduction frame 51 and the bearing leg 33, and then the universal wheel 42 moves to the bottom of the bottom plate 310, and then the simulation box 1 is moved to the specified position;

[0052] After the position is determined, the universal wheel 42 is moved up and stored, and then the groundwater taken out from the underground excavation position is injected into the interior of the water tank 21, and then the simulation model is placed inside the simulation box 1, and then the corresponding water inlet hole is opened, and the screw 24 is rotated to drive the moving block 23 to move up and down, so that the drainage hole of the water inlet block 22 corresponds to the inside of the water inlet hole at the corresponding position, and then the groundwater inside the water tank 21 is pumped out into the connecting pipe 25 and the water inlet block 22, so that the groundwater enters the interior of the simulation box 1 through the water inlet hole, and then the transparency of the simulation box 1 is used to simulate the flow of groundwater, and then after the simulation is completed, the impact assessment operation is performed.

[0053] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tunnel excavation groundwater environmental impact assessment simulation device, include: A simulation box (1), wherein a water inlet hole is provided on the side of the inner wall of the simulation box (1), and a sealing plug is inserted and connected through the inner cavity thread of the water inlet hole; The invention is characterized in that a simulation mechanism (2) is arranged on the side of the simulation box (1), an adjustment mechanism (3) for placing the simulation box (1) at different heights is arranged on the bottom of the simulation box (1), a moving mechanism (4) for assisting the transportation of the simulation box (1) is arranged on the side of the adjustment mechanism (3), a limiting mechanism (5) for locking the moving mechanism (4) at different positions is arranged on the side of the adjustment mechanism (3), and the adjustment mechanism (3) comprises: A support plate (31), wherein an adjustment plate (32) is slidably disposed outside the support plate (31), and a bearing leg (33) is fixedly connected to the bottom end of the adjustment plate (32); A limiting plate (34), wherein the limiting plate (34) is slidably arranged on a side of the supporting plate (31).

2. A tunnel excavation groundwater environmental impact assessment simulation device according to claim 1, It is characterized in that The regulating mechanism (3) further comprises: An operating frame (35), the side of the operating frame (35) is fixedly connected to the limiting plate (34), the side of the adjusting plate (32) is provided with a first sliding groove, the side of the supporting plate (31) is provided with first clamping grooves at equal intervals, and the limiting plate (34) is slidably interlaced with the inner cavity of the first sliding groove and the first clamping groove; A linkage frame (312), the bottom ends of which are respectively fixedly connected to the two operating frames (35); A series rod (313), wherein the series rod (313) is fixedly connected between adjacent load-bearing legs (33), and the bottom end of the load-bearing leg (33) is fixedly connected to a bottom plate (310).

3. A tunnel excavation groundwater environmental impact assessment simulation device according to claim 2, It is characterized in that A second slide groove is provided at the top end of the adjustment plate (32), the support plate (31) is slidably connected with the inner cavity of the second slide groove, the bottom end of the adjustment plate (32) is fixedly connected with a fixed frame (36), a sliding frame (37) is slidably provided inside the fixed frame (36), and the side of the sliding frame (37) is fixedly connected with the operating frame (35).

4. A tunnel excavation groundwater environmental impact assessment simulation device according to claim 3, It is characterized in that A round rod is fixedly connected to the side of the inner wall of the sliding frame (37), a square plate (39) is embedded in the inner cavity of the fixed frame (36), the outer wall of the round rod is slidably inserted and connected with the square plate (39), a first spring (38) is sleeved on the outside of the round rod, one end of the first spring (38) is fixedly connected to the sliding frame (37), and the other end of the first spring (38) is fixedly connected to the square plate (39), the side of the bearing leg (33) is symmetrically fixedly connected with an auxiliary plate, and auxiliary wheels (311) are rotatably connected between adjacent auxiliary plates, and a third sliding groove is opened on the other side of the support plate (31), and the side of the auxiliary wheel (311) is located inside the third sliding groove.

5. A tunnel excavation groundwater environmental impact assessment simulation device according to claim 1, It is characterized in that The simulation mechanism (2) comprises: A water tank (21), the water tank (21) is fixedly connected to the side of the simulation box (1), and a connecting pipe (25) is fixedly sleeved on the top of the water tank (21); A water inlet block (22), one end of the connecting pipe (25) is fixedly sleeved on the side of the water inlet block (22), and the side of the water inlet block (22) corresponds to the inner cavity of the water inlet hole; A moving block (23), the side of which is fixedly connected to the water inlet block (22), the top of which is threadedly connected with a screw rod (24), the side of the simulation box (1) is fixedly connected to a support, and the screw rod (24) is rotatably connected to the support.

6. A tunnel excavation groundwater environmental impact assessment simulation device according to claim 1, It is characterized in that The moving mechanism (4) comprises: A support column (41), wherein the bottom end of the support column (41) is fixedly connected to a universal wheel (42); A guide frame (43), the side of which is fixedly connected to the support column (41), and the bearing leg (33) is slidably and interlacedly connected to the inner cavity of the guide frame (43).

7. A tunnel excavation groundwater environmental impact assessment simulation device according to claim 1, It is characterized in that The limiting mechanism (5) comprises: An introduction frame (51), the bottom end of the introduction frame (51) being fixedly connected to the support column (41); A positioning column (52), wherein the positioning column (52) is slidably connected with the inner cavity of the introduction frame (51).

8. A tunnel excavation groundwater environmental impact assessment simulation device according to claim 7, It is characterized in that The limiting mechanism (5) further comprises: An assembly cylinder, wherein a support cylinder (53) is arranged on the side of the assembly cylinder, a threaded cylinder is fixedly connected to the side of the support cylinder (53), an annular groove is provided on the side of the assembly cylinder, and the threaded cylinder is threadedly interlaced with the inner cavity of the annular groove; A sliding rod, one end of which is threadedly connected to the side of the positioning column (52).

9. A tunnel excavation groundwater environmental impact assessment simulation device according to claim 8, It is characterized in that Two second slots are provided on the side of the bearing leg (33), the positioning column (52) is slidably connected with the inner cavity of the second slot, and the positioning column (52) is slidably connected with the inner cavity of the support tube (53).

10. A tunnel excavation groundwater environmental impact assessment simulation device according to claim 9, It is characterized in that A pulling plate (55) is provided on the other side of the assembly tube, and the side of the pulling plate (55) is fixedly connected to the sliding rod. A circular groove matching the sliding rod is provided on the other side of the assembly tube. A second spring (54) is sleeved on the outside of the sliding rod, and one end of the second spring (54) is in contact with the positioning column (52), and the other end of the second spring (54) is in contact with the inner wall of the support tube (53).

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