Shield tunneling simulation test device

Abstract

The utility model relates to the technical field of shield tunnel model tests, in particular to a shield tunneling simulation test device which comprises a rack, a shell fixedly connected to the left side of the upper end of the rack, supporting columns fixedly connected to the front side and the rear side of the upper end of the shell, a linkage plate slidably connected to the outer sides of the supporting columns, and a first threaded rod in threaded connection with the upper end of the linkage plate. The right end of the shell is fixedly connected with a display, the interior of the first pressing plate is in threaded connection with a second threaded rod, the lower end of the second threaded rod is rotationally connected with a second pressing plate, and first limiting rods are arranged on the front side and the rear side of the second threaded rod; through design cooperation of a first pressing plate and a first threaded rod, the first pressing plate moves downwards by rotating the first threaded rod, so that a drilling medium is pressed, the tunneling working condition of the shield tunneling machine in a high-pressure soil layer is reproduced, and the experiment feasibility is improved.

Description

Technical Field

[0001] This utility model relates to the field of shield tunnel model testing technology, and in particular to a shield tunneling simulation test device. Background Technology

[0002] The shield tunneling simulation test device is an important supporting tool for the development of shield tunneling technology. Its technological progress is directly related to the safety, efficiency and economy of tunnel engineering.

[0003] Patent specification CN221053690U discloses a shield tunneling simulation test device, including a simulation box simulating geological strata, a shield tunneling device, and a reaction frame. The shield tunneling device is housed within the simulation box and is equipped with a hydraulic rod. One end of the hydraulic rod is connected to a connecting rod to transmit hydraulic thrust to the reaction frame. A front steel plate is mounted on the reaction frame, and the other end of the connecting rod abuts against the front steel plate to provide jacking thrust for the shield tunneling device. This invention transmits the hydraulic thrust generated by the hydraulic rod to the front steel plate of the reaction frame via the connecting rod. The reaction force generated by the front steel plate is then transmitted to the hydraulic rod via the connecting rod to drive the shield tunneling device, providing continuous jacking pressure. This eliminates the need for negative ring segment assembly, simplifies the experimental process, is simple to apply, has a wide range of applications, avoids direct stress on the segments causing damage, and is easy to install, disassemble, and manufacture.

[0004] However, in implementing the relevant technology, the above-mentioned shield tunneling simulation test device has the following problems: the medium inside the simulation box is drilled by the shield tunneling device for simulation operation, but there is no structure to squeeze the medium to simulate pressure, which makes it impossible to truly reproduce the tunneling conditions of the shield machine in high-pressure soil layers. This results in a large deviation between the test data and the actual construction situation, reduces the reliability of the test results, and weakens the practicality and scientific research value of the test device. In view of this, a shield tunneling simulation test device is provided to overcome the above defects. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a shield tunneling simulation test device.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a shield tunneling simulation test device, comprising a frame, a housing fixedly connected to the upper left side of the frame, support columns fixedly connected to the front and rear sides of the upper end of the housing, a linkage plate slidably connected to the outer side of the support columns, a first threaded rod threadedly connected to the upper end of the linkage plate, a first pressure plate rotatably connected to the lower end of the first threaded rod, a sensor fixedly connected to the lower end of the first pressure plate, a display fixedly connected to the right end of the housing, a second threaded rod threadedly connected inside the first pressure plate, a second pressure plate rotatably connected to the lower end of the second threaded rod, first limiting rods provided on the front and rear sides of the second threaded rod, a hollow box fixedly connected to the front and rear sides of the lower end of the linkage plate, a first spring fixedly connected inside the hollow box, a locking block fixedly connected to the end of the first spring away from the hollow box, a propulsion motor fixedly connected to the upper right side of the frame, a propulsion threaded rod fixedly connected to the output end of the propulsion motor, a moving plate provided outside the propulsion threaded rod, a second limiting rod slidably connected inside the moving plate, a reduction motor provided at the right end of the moving plate, and a shield machine simulator provided at the output end of the reduction motor.

[0007] As a further description of the above technical solution: the front and rear ends of the first pressure plate are slidably connected to the outside of the support column, the outside of the first limiting rod is slidably connected to the inside of the first pressure plate, and the left and right ends of the locking block are in contact with the support column, so that by rotating the first threaded rod, the first pressure plate is squeezed downward to compress the medium, thereby achieving the effect of simulating pressure.

[0008] As a further description of the above technical solution: a through circular groove is provided at the upper and lower edges of the linkage plate, and the diameter of the circular groove matches the diameter of the support column. A threaded hole is provided at the center of the linkage plate, and the inner wall diameter of the threaded hole matches the diameter of the first threaded rod. The inner wall of the threaded hole at the center of the linkage plate is provided with an internal thread that matches the external thread spacing of the first threaded rod, so that the linkage plate can slide on the outside of the support column, thereby adjusting the position of the linkage plate on the outside of the support column.

[0009] As a further description of the above technical solution: the lower end of the first pressure plate is provided with several square grooves, and the shape and size of the cross-section of the square grooves are matched with the shape and size of the cross-section of the second pressure plate, so that by rotating the second threaded rod, the second pressure plate is pressed downward, thereby simulating the medium inside the shell being subjected to different degrees of pressure, providing a more complex simulation environment.

[0010] As a further description of the above technical solution: a square groove is provided on the upper right side of the shell, and a propulsion hole is provided at the bottom right end of the square groove. The diameter of the propulsion hole matches the diameter of the tunnel boring machine simulator. By placing a baffle inside the square groove, the tunnel boring machine simulator can avoid leakage of the medium from the propulsion hole when it does not enter the shell.

[0011] As a further description of the above technical solution: the lower end of the reduction motor is provided with an outlet, and the lower end of the outlet is provided with a collection box, so that the medium drilled by the tunnel boring machine simulator falls into the collection box through the outlet, avoiding the medium from scattering everywhere and increasing the cleaning burden.

[0012] As a further description of the above technical solution: the lower end of the outlet is provided with a latch, and the upper end of the collection box is provided with a buckle structure that matches the latch, so that the collection box can be engaged with the outlet, making it convenient for personnel to replace and clean it.

[0013] This utility model has the following beneficial effects:

[0014] The shield tunneling simulation test device designed in this utility model uses the design and cooperation of the first pressure plate and the first threaded rod to make the first pressure plate move downward by rotating the first threaded rod, thereby compressing the drilling medium and replicating the tunneling conditions of the shield machine in high-pressure soil layers, thus improving the feasibility of the experiment. At the same time, the second threaded rod and the second pressure plate are set to make the medium in different directions subject to different degrees of compression, providing a more complex simulation environment.

[0015] The shield tunneling simulation test device designed in this utility model, through the design and cooperation of the outlet and the collection box, allows the medium drilled by the shield machine simulator to fall into the collection box through the outlet, avoiding the scattering of rock debris, mud and other materials on the equipment or test platform, reducing tool wear and tear, and also reducing the cleaning burden on the experimental personnel. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the first pressure plate structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the first pressure plate of this utility model rotating vertically by 180°;

[0019] Figure 4 This is a schematic diagram of the longitudinal cross-sectional structure of the hollow box of this utility model;

[0020] Figure 5 This is a schematic diagram of the distribution structure of the collection box of this utility model.

[0021] Figure 6 This is a schematic diagram of the outlet distribution structure of this utility model.

[0022] Legend:

[0023] 1. Frame; 2. Housing; 3. Support column; 4. Linkage plate; 5. First threaded rod; 6. First pressure plate; 7. Second threaded rod; 8. Second pressure plate; 9. Sensor; 10. Display; 11. First limit rod; 12. Hollow box; 13. First spring; 14. Locking block; 15. Propulsion motor; 16. Propulsion threaded rod; 17. Moving plate; 18. Second limit rod; 19. Gear motor; 20. Shield tunneling machine simulator; 21. Discharge port; 22. Collection box. Detailed Implementation

[0024] Reference Figures 1 to 6 This utility model provides a shield tunneling simulation test device, including a frame 1, a shell 2 welded to the upper left side of the frame 1, support columns 3 welded to the front and rear sides of the upper end of the shell 2, a linkage plate 4 slidably connected to the outer side of the support columns 3, a first threaded rod 5 threadedly connected to the upper end of the linkage plate 4, a first pressure plate 6 rotatably connected to the lower end of the first threaded rod 5, a sensor 9 bolted to the lower end of the first pressure plate 6, a display 10 bolted to the right end of the shell 2, a second threaded rod 7 threadedly connected to the inside of the first pressure plate 6, a second pressure plate 8 rotatably connected to the lower end of the second threaded rod 7, and first limit rods 1 set on the front and rear sides of the second threaded rod 7. 1. Hollow boxes 12 are welded to the front and rear sides of the lower end of the linkage plate 4. A first spring 13 is welded inside the hollow box 12. A locking block 14 is welded to the end of the first spring 13 away from the hollow box 12. The upper and lower ends of the inner side of the support column 3 are provided with slots that are compatible with the locking block 14. The upper right side of the frame 1 is connected to the propulsion motor 15 by bolts. The output end of the propulsion motor 15 is welded to the propulsion threaded rod 16. A moving plate 17 is set on the outside of the propulsion threaded rod 16. The second limit rod 18 is slidably connected inside the moving plate 17. A reduction motor 19 is set on the right end of the moving plate 17. A shield machine simulator 20 is set on the output end of the reduction motor 19.

[0025] As a further implementation of the above technical solution: the front and rear ends of the first pressure plate 6 are slidably connected to the outside of the support column 3, the outside of the first limiting rod 11 is slidably connected to the inside of the first pressure plate 6, and the left and right ends of the locking block 14 are in contact with the support column 3, so that by rotating the first threaded rod 5, the first pressure plate 6 is squeezed downward to compress the medium, thereby achieving the effect of simulating pressure.

[0026] As a further implementation of the above technical solution: a through circular groove is provided at the upper and lower edges of the linkage plate 4, and the diameter of the circular groove matches the diameter of the support column 3. A threaded hole is provided at the center of the linkage plate 4, and the inner wall diameter of the threaded hole matches the diameter of the first threaded rod 5. The inner wall of the threaded hole at the center of the linkage plate 4 is provided with an internal thread that matches the external thread spacing of the first threaded rod 5, so that the linkage plate 4 can slide on the outside of the support column 3, thereby adjusting the position of the linkage plate 4 on the outside of the support column 3.

[0027] As a further implementation of the above technical solution: the lower end of the first pressure plate 6 is provided with several square grooves, and the shape and size of the cross-section of the square grooves are matched with the shape and size of the cross-section of the second pressure plate 8, so that by rotating the second threaded rod 7, the second pressure plate 8 is pressed downward, thereby simulating the medium inside the shell 2 being subjected to different degrees of pressure, providing a more complex simulation environment.

[0028] As a further implementation of the above technical solution: a square groove is provided on the upper right side of the shell 2, and a propulsion hole is provided at the bottom right end of the square groove. The diameter of the propulsion hole matches the diameter of the tunnel boring machine simulator 20. By placing a baffle inside the square groove, the tunnel boring machine simulator 20 can avoid leakage of the medium from the propulsion hole when it does not enter the shell 2.

[0029] As a further implementation of the above technical solution: the lower end of the geared motor 19 is provided with an outlet 21, and the lower end of the outlet 21 is provided with a collection box 22, so that the medium drilled by the tunnel boring machine simulator 20 falls into the collection box 22 through the outlet 21, avoiding the medium from scattering everywhere and increasing the cleaning burden.

[0030] As a further implementation of the above technical solution: the lower end of the outlet 21 is provided with a latch, and the upper end of the collection box 22 is provided with a buckle structure that matches the latch, so that the collection box 22 can be engaged with the outlet 21, making it convenient for personnel to replace and clean it.

[0031] The sensor 9 and display 10 used in this manual are common structures on the market, specifically model PT5771G and JWS070-M4, respectively. Since no internal modifications have been made to them in this manual, they will not be described in detail.

[0032] Working principle:

[0033] When using this invention, the medium is poured into the housing 2 at the upper end of the frame 1. Then, the operating block on the outside of the hollow box 12 is pressed, compressing the first spring 13, causing the block 14 to retract inward, disengaging the outer side of the block 14 from the inner side of the support column 3. Then, the linkage plate 4 is moved downward until the block 14 is engaged in the slot at the lower end of the support column 3, fixing the linkage plate 4 to the outside of the support column 3. Then, the first threaded rod 5 is rotated, pushing the first pressure plate 6 downward to compress the medium. Then, the propulsion motor 15 is started, driving the propulsion threaded rod 16 to rotate, causing the moving plate 17 to move outside the second limit rod 18. The moving plate 17 drives the shield machine mold. The simulator 20 moves and starts the reduction motor 19. The reduction motor 19 drives the front drill bit of the tunnel boring machine simulator 20 to rotate, simulating the drilling situation of the tunnel boring machine in a high-pressure environment, thus improving the credibility of the experiment. The second threaded rod 7 is rotated, causing the second pressure plate 8 and the first limit rod 11 to move at the lower end of the first pressure plate 6, so that the medium in different areas inside the shell 2 is subjected to different degrees of pressure, simulating more complex soil conditions. At the same time, the sensor 9 at the lower end of the second pressure plate 8 transmits the signal to the display 10, thereby more accurately observing the pressure situation. The tunnel boring machine simulator 20 can discharge the drilled medium from the rear end, which falls into the collection box 22 through the discharge port 21, reducing the cleaning burden of the staff.

[0034] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A shield tunneling simulation test device, comprising a frame (1), characterized in that: A housing (2) is fixedly connected to the upper left side of the frame (1). Support columns (3) are fixedly connected to the front and rear sides of the upper end of the housing (2). A linkage plate (4) is slidably connected to the outside of the support column (3). A first threaded rod (5) is threadedly connected to the upper end of the linkage plate (4). A first pressure plate (6) is rotatably connected to the lower end of the first threaded rod (5). A sensor (9) is fixedly connected to the lower end of the first pressure plate (6). A display (10) is fixedly connected to the right end of the housing (2). A second threaded rod (7) is threadedly connected inside the first pressure plate (6). A second pressure plate (8) is rotatably connected to the lower end of the second threaded rod (7). A first limit rod (11) is provided on the front and rear sides of the second threaded rod (7). A hollow box (12) is fixedly connected to the front and rear sides of the lower end of the linkage plate (4). A first spring (13) is fixedly connected inside the hollow box (12). A locking block (14) is fixedly connected to the end of the first spring (13) away from the hollow box (12). A propulsion motor (15) is fixedly connected to the upper right side of the frame (1). A propulsion threaded rod (16) is fixedly connected to the output end of the propulsion motor (15). A moving plate (17) is provided on the outside of the propulsion threaded rod (16). A second limiting rod (18) is slidably connected inside the moving plate (17). A reduction motor (19) is provided on the right end of the moving plate (17). A shield machine simulator (20) is provided at the output end of the reduction motor (19).

2. The shield tunneling simulation test device according to claim 1, characterized in that: The first pressure plate (6) is slidably connected to the outside of the support column (3) at both ends, the first limiting rod (11) is slidably connected to the inside of the first pressure plate (6) at the outside, and the card block (14) is in contact with the support column (3) at both ends.

3. The shield tunneling simulation test device according to claim 1, characterized in that: The linkage plate (4) has through circular grooves at its upper and lower edges, and the diameter of the circular grooves matches the diameter of the support column (3). The linkage plate (4) has a threaded hole at its center, and the inner wall diameter of the threaded hole matches the diameter of the first threaded rod (5). The inner wall of the threaded hole at the center of the linkage plate (4) is provided with an internal thread that matches the external thread spacing of the first threaded rod (5).

4. The shield tunneling simulation test device according to claim 1, characterized in that: The lower end of the first pressure plate (6) is provided with several square grooves, and the shape and size of the cross-section of the square grooves are matched with the shape and size of the cross-section of the second pressure plate (8).

5. The shield tunneling simulation test device according to claim 1, characterized in that: The upper right side of the shell (2) is provided with a square groove, and the bottom right end of the square groove is provided with a propulsion hole, and the diameter of the propulsion hole matches the diameter of the shield machine simulator (20).

6. The shield tunneling simulation test device according to claim 1, characterized in that: The lower end of the geared motor (19) is provided with an outlet (21), and a collection box (22) is provided at the lower end of the outlet (21).

7. The shield tunneling simulation test device according to claim 6, characterized in that: The lower end of the outlet (21) is provided with a latch, and the upper end of the collection box (22) is provided with a buckle structure that matches the latch.

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