A test device for simulating the whole process of rectangular pipe jacking construction

Abstract

The present invention provides a test device for simulating the whole process of rectangular pipe jacking construction, including a base, a mounting port is provided on the base, a large soil frame and a small soil frame that can move up and down are installed in the mounting port, the large soil frame and the small soil frame are butt-jointed, a vertical soil plate that can move up and down is installed at the joint of the large soil frame and the small soil frame, a mounting plate that can move up and down is installed in the large soil frame, a movable plate that can move back and forth is installed at the bottom of the mounting plate, a storage groove is provided in the mounting plate, a transverse soil plate that can move horizontally into the small soil frame is installed in the storage groove, a mounting groove is provided at the bottom of the movable plate, and a soil collection mechanism is installed in the mounting groove. The device can be moved to the construction site to be constructed, and can directly intercept the soil layer on site in a small range for simulation experiments, which can make the results more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of underground engineering construction, and in particular to a test device for simulating the entire process of rectangular pipe jacking construction. Background Art

[0002] With the acceleration of urbanization, the urban population is increasing, and urban roads are becoming increasingly crowded. In order to solve the above problems, underground rail transit, underground integrated pipeline corridors and underpasses have been rapidly applied. In the construction process of underground projects, due to the complexity of underground space and in order to minimize the impact on surrounding environmental facilities, underground project construction is more difficult. The jacking method and shield method in trenchless technology are the more commonly used underground project construction methods in the existing technology.

[0003] Pipe jacking machines are divided into circular pipe jacking machines and rectangular pipe jacking machines. Since the cross-section of a circular pipe jacking machine is quite different from that of the actual target tunnel, the workload of reshaping work after construction of the circular pipe jacking machine is large, resulting in low construction efficiency of underground projects using circular pipe jacking machines. The rectangular pipe jacking machine can better avoid this problem.

[0004] However, the construction of rectangular pipe jacking will inevitably disturb the soil around the pipe section, causing complex mechanical behaviors such as unloading or loading in the soil, and inducing complex deformation of the soil. Therefore, simulation experiments are needed. The existing simulation experiments need to first survey the underground soil structure layer on site, and then fill a similar soil layer in the laboratory. This method is more cumbersome and there are still differences between the actual soil layer and the actual soil layer, which will affect the accuracy of the experiment. Summary of the invention

[0005] In view of the above problems, the present invention provides a test device for simulating the entire process of rectangular pipe jacking construction. The device can be moved to the construction site and can directly intercept the on-site soil layer in a small range for simulation experiments, which can make the results more accurate.

[0006] To solve the above problems, the technical solution adopted by the present invention is:

[0007] The invention relates to a test device for simulating the whole process of rectangular jacking construction, comprising a base, a mounting opening is provided on the base, a large soil-cutting frame and a small soil-cutting frame which can move up and down are installed in the mounting opening, the large soil-cutting frame and the small soil-cutting frame are butted against each other, and a vertical soil-cutting plate which can move up and down is installed at the butt joint of the large soil-cutting frame and the small soil-cutting frame, a mounting plate which can move up and down is installed in the large soil-cutting frame, a movable plate which can move back and forth reciprocatingly is installed at the bottom of the mounting plate, a storage groove is provided in the mounting plate, a transverse soil-cutting plate which can move horizontally into the small soil-cutting frame is installed in the storage groove, a mounting groove is provided at the bottom of the movable plate, a soil collecting mechanism is installed in the mounting groove, a rectangular jacking pipe pushing mechanism which can be pushed into the small soil-cutting frame is installed on the right side of the base, a top plate is fixedly connected to the base through two support plates, and a soil disturbance detection mechanism is installed at the bottom of the top plate.

[0008] Preferably, a plurality of universal wheels are installed at the bottom of the base.

[0009] Preferably, vertically arranged guide rails are fixedly installed at the corners of the large-section soil frame and the small-section soil frame, and the inner wall of the installation opening is adapted to the guide rails.

[0010] Preferably, two first hydraulic cylinders are installed on the top plate, and the telescopic ends of the two first hydraulic cylinders are fixedly connected to connecting plates, and the two connecting plates are respectively fixedly connected to the side walls of the large soil-cutting frame and the small soil-cutting frame.

[0011] Preferably, a bracket is installed on the top plate, and a second hydraulic cylinder is installed on the bracket. The telescopic end of the second hydraulic cylinder is fixedly connected to a back plate. The top of the vertical earth-cutting plate passes through the top plate and is fixedly connected to the back plate. The bottom of the back plate is also fixedly connected to two connecting rods. The lower ends of the two connecting rods pass through the top plate and are fixedly connected to the mounting plate. A guide groove adapted to the vertical earth-cutting plate is provided at the joint of the large earth-cutting frame and the small earth-cutting frame.

[0012] Preferably, a threaded rod is rotatably connected in the storage groove, a first motor that can drive the threaded rod to rotate is installed on the mounting plate, a push plate is threadedly connected to the threaded rod, one end of the transverse earth-cutting plate is fixedly connected to the push plate, and the side wall of the vertical earth-cutting plate is provided with a strip opening for the transverse earth-cutting plate to pass through.

[0013] Preferably, the soil collecting mechanism includes a rotating rod rotatably connected in the mounting groove, a plurality of rows of soil-breaking rods and a plurality of scraping covers are fixedly connected in the circumferential direction of the rotating rod, the scraping covers are arranged between two adjacent rows of soil-breaking rods, a second motor capable of driving the rotating rod to rotate is installed on the movable plate, a collecting groove is provided on the rear inner wall of the mounting groove, a horizontal screw conveyor is installed in the collecting groove, an output cylinder extending into the collecting groove is fixedly connected to the left end of the movable plate, a vertical screw conveyor is installed in the output cylinder.

[0014] Preferably, the rectangular jacking pipe insertion mechanism includes a third hydraulic cylinder installed on the right end of the base, the telescopic end of the third hydraulic cylinder is fixedly connected to the rectangular jacking pipe, the front end of the rectangular jacking pipe is installed with a breaker head, the right support plate is provided with a guide opening for the breaker head and the rectangular jacking pipe to pass through, and the right side of the small soil section frame is provided with a jacking entrance corresponding to the breaker head.

[0015] Preferably, the soil disturbance detection mechanism comprises a plurality of vibrating-wire displacement meters installed at the bottom of the top plate, and a plurality of pressure sensors are also embedded and installed on the front and rear inner walls of the small-section soil frame.

[0016] Preferably, two forward and backward electric slide rails are installed at the bottom of the mounting plate, and the movable plate is installed on the electric slide rails.

[0017] The beneficial effects of the present invention are:

[0018] 1. By installing the base and multiple universal wheels, the entire test device can be directly moved to the site. The large and small soil-cutting frames are directly pushed into the soil on site through the first hydraulic cylinder, and then the soil layer of a certain depth is directly intercepted through the vertical and horizontal soil-cutting plates. The simulation experiment is directly carried out in the intercepted soil, and the experimental data is more accurate.

[0019] 2. By installing a soil collecting mechanism, the vertical cutting plate can be moved down and inserted into the soil at the same time, the mounting plate and the movable plate can be moved down, the second motor can be started to drive the rotating rod to rotate, and then drive multiple rows of breaking rods to rotate, so that the soil in the large cutting frame can be broken from top to bottom, and then the broken soil can be collected by multiple scraper covers and thrown into the collection trough under the action of centrifugal force, and the soil can be sent out by the horizontal screw conveyor and the vertical screw conveyor, so that the horizontal cutting plate can be smoothly moved to the horizontal cutting position.

[0020] 3. By installing the rectangular jacking pipe insertion mechanism and the soil disturbance detection mechanism, when the square experimental soil layer is successfully intercepted, it is only necessary to start the third hydraulic cylinder to drive the earth-breaking head and the rectangular jacking pipe through the guide port and the jacking port into the small soil cutting frame, and then into the experimental soil. The displacement range of the soil surface can be detected by multiple vibrating string displacement meters, and the extrusion state of the soil on both sides of the rectangular jacking pipe can be detected by multiple pressure sensors. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 A top view of a large soil cutting frame and a small soil cutting frame proposed by the present invention;

[0023] Figure 3 A cross-sectional view of the mounting plate and the movable plate proposed by the present invention;

[0024] Figure 4 A side sectional view of the movable plate proposed by the present invention;

[0025] Figure 5 This is a cross-sectional view of the collecting tank and the output cylinder proposed by the present invention.

[0026] In the figure: 1 base, 2 top plate, 3 output cylinder, 4 first hydraulic cylinder, 5 mounting plate, 6 moving plate, 7 back plate, 8 second hydraulic cylinder, 9 bracket, 10 connecting rod, 11 vertical soil cutting plate, 12 strip mouth, 13 vibrating wire displacement meter, 14 pressure sensor, 15 small soil cutting frame, 16 large soil cutting frame, 17 guide groove, 18 guide rail, 19 connecting plate, 20 top entrance, 21 earth-breaking machine head, 22 rectangular top pipe, 23 third hydraulic cylinder, 24 universal wheel, 25 support plate, 26 scraper cover, 27 rotating rod, 28 earth-breaking rod, 29 mounting groove, 30 electric slide rail, 31 first motor, 32 threaded rod, 33 horizontal soil cutting plate, 34 collecting trough, 35 push plate, 36 horizontal screw conveyor, 37 vertical screw conveyor, 38 storage trough. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0029] Reference Figure 1-5A test device for simulating the whole process of rectangular jacking construction comprises a base 1, a mounting opening is provided on the base 1, a large soil frame 16 and a small soil frame 15 which can move up and down are installed in the mounting opening, the large soil frame 16 and the small soil frame 15 are butted, a vertical soil plate 11 which can move up and down is installed at the butt joint of the large soil frame 16 and the small soil frame 15, a mounting plate 5 which can move up and down is installed in the large soil frame 16, a movable plate 6 which can move back and forth is installed at the bottom of the mounting plate 5, a storage groove 38 is provided in the mounting plate 5, a transverse soil plate 33 which can move horizontally into the small soil frame 15 is installed in the storage groove 38, a mounting groove 29 is provided at the bottom of the movable plate 6, a soil collecting mechanism is installed in the mounting groove 29, a rectangular jacking mechanism which can be inserted into the small soil frame 15 is installed on the right side of the base 1, a top plate 2 is fixedly connected to the base 1 through two support plates 25, and a soil disturbance detection mechanism is installed at the bottom of the top plate 2.

[0030] Furthermore, a plurality of universal wheels 24 are installed at the bottom of the base 1, so that the base 1 can be directly moved to the construction site.

[0031] Furthermore, vertical guide rails 18 are fixedly installed at the corners of the large-section soil frame 16 and the small-section soil frame 15, and the inner wall of the installation opening is adapted to the guide rails, so that the large-section soil frame 16 and the small-section soil frame 15 can move up and down stably.

[0032] Preferably, two first hydraulic cylinders 4 are installed on the top plate 2, and the telescopic ends of the two first hydraulic cylinders 4 are fixedly connected to the connecting plates 19. The two connecting plates 19 are respectively fixedly connected to the side walls of the large-section soil frame 16 and the small-section soil frame 15. When the two first hydraulic cylinders 4 are started, the large-section soil frame 16 and the small-section soil frame 15 are driven to move downward at the same time through the connecting plates 19. Due to the bottom blade setting of the large-section soil frame 16 and the small-section soil frame 15, the large-section soil frame 16 and the small-section soil frame 15 are inserted into the ground under pressure.

[0033] Furthermore, a bracket 9 is installed on the top plate 2, and a second hydraulic cylinder 8 is installed on the bracket 9. The telescopic end of the second hydraulic cylinder 8 is fixedly connected to the back plate 7. The top of the vertical earth-cutting plate 11 passes through the top plate 2 and is fixedly connected to the back plate 7. The bottom of the back plate 7 is also fixedly connected to two connecting rods 10. The lower ends of the two connecting rods 10 pass through the top plate 2 and are fixedly connected to the mounting plate 5. A guide groove 17 adapted to the vertical earth-cutting plate 11 is provided at the joint of the earth-cutting frame 16 and the small earth-cutting frame 15. The second hydraulic cylinder 8 is started, and the vertical earth-cutting plate 11 is driven to be inserted into the ground along the guide groove 17 through the back plate 7 to cut off the soil between the large earth-cutting frame 16 and the small earth-cutting frame 15.

[0034] Furthermore, a threaded rod 32 is rotatably connected in the storage groove 38, and a first motor 31 that can drive the threaded rod 32 to rotate is installed on the mounting plate 5. A push plate 35 is threadedly connected to the threaded rod 32, and one end of the horizontal earth-cutting plate 33 is fixedly connected to the push plate 35. The side wall of the vertical earth-cutting plate 11 is provided with a strip opening 12 for the horizontal earth-cutting plate 33 to pass through. The first motor 31 is started to drive the threaded rod 32 to rotate, and the horizontal earth-cutting plate 33 is driven by the push plate 35 to pass through the strip opening 12 on the vertical earth-cutting plate 11, so that a soil layer of a certain depth can be directly intercepted.

[0035] Specifically, the soil collecting mechanism includes a rotating rod 27 rotatably connected in the mounting groove 29, and a plurality of rows of soil-breaking rods 28 and a plurality of scraping covers 26 are fixedly connected in the circumferential direction of the rotating rod 27, and the scraping covers 26 are arranged between two adjacent rows of soil-breaking rods 28. A second motor capable of driving the rotating rod 27 to rotate is installed on the movable plate 6, and a collecting groove 34 is provided on the rear inner wall of the mounting groove 29, and a transverse screw conveyor 36 is installed in the collecting groove 34. The left end of the movable plate 6 is fixedly connected with an output cylinder 3 extending into the collecting groove 34, and a vertical screw conveyor 37 is installed in the output cylinder 3. The soil is sent out through the output cylinder 3 by the transverse screw conveyor 36 and the vertical screw conveyor 37, so that the soil in the large soil-cutting frame 16 can be emptied, and the transverse soil-cutting plate 33 can be smoothly moved to the transverse soil-cutting position.

[0036] Specifically, the rectangular jacking mechanism includes a third hydraulic cylinder 23 installed on the right end of the base 1, the telescopic end of the third hydraulic cylinder 23 is fixedly connected to the rectangular jacking pipe 22, the front end of the rectangular jacking pipe 22 is installed with a breaker head 21, and the right support plate 25 is provided with a guide port for the breaker head 21 and the rectangular jacking pipe 22 to pass through. The right side of the small soil-cutting frame 15 is provided with a jacking entrance 20 corresponding to the breaker head 21. Starting the third hydraulic cylinder 23 can drive the breaker head 21 and the rectangular jacking pipe 22 to pass through the guide port and the jacking entrance 20 into the small soil-cutting frame 15, and then into the experimental soil, simulating the rectangular jacking process.

[0037] Specifically, the soil disturbance detection mechanism includes a plurality of vibrating-string displacement meters 13 installed at the bottom of the top plate 2, and a plurality of pressure sensors 14 are also embedded and installed on the front and rear inner walls of the small-section soil frame 15. The displacement range of the soil surface can be detected by the plurality of vibrating-string displacement meters 13, and the plurality of pressure sensors 14 can detect the extrusion state of the soil on both sides of the rectangular top pipe 22.

[0038] Furthermore, two forward and backward electric slide rails 30 are installed at the bottom of the mounting plate 5 , and the moving plate 6 is installed on the electric slide rails 30 .

[0039] The base 1 is moved to the construction site through a plurality of universal wheels 24, an open ground is selected, and the two first hydraulic cylinders 4 are started. The large soil-cutting frame 16 and the small soil-cutting frame 15 are driven to move downward at the same time through the connecting plate 19. Due to the bottom blade setting of the large soil-cutting frame 16 and the small soil-cutting frame 15, the large soil-cutting frame 16 and the small soil-cutting frame 15 are inserted into the ground under pressure. Then the second hydraulic cylinder 8 is started, and the vertical soil-cutting plate 11 is driven to be inserted into the ground along the guide groove 17 through the abutment plate 7, and the soil between the large soil-cutting frame 16 and the small soil-cutting frame 15 is cut off. Then, the mounting plate 5 is driven to move downward at the same time through the two connecting rods 10, and the movable plate 6 moves downward accordingly. The electric slide rail 30 is started to drive the movable plate 6 to move back and forth, and then the second electric slide rail is started. The machine drives the rotating rod 27 to rotate, and drives multiple rows of soil-breaking rods 28 to rotate, breaking the soil in the large soil-cutting frame 16 from top to bottom, and then scraping the broken soil through multiple scraping covers 26, and throwing it into the collecting trough 34 under the action of centrifugal force, and sending the soil through the output cylinder 3 through the horizontal screw conveyor 36 and the vertical screw conveyor 37, so that the horizontal soil-cutting plate 33 can be smoothly moved to the horizontal soil-cutting position, and the first motor 31 is started to drive the threaded rod 32 to rotate, and the horizontal soil-cutting plate 33 is driven by the push plate 35 to pass through the strip opening 12 on the vertical soil-cutting plate 11, so that a soil layer of a certain depth can be directly intercepted, and the large soil-cutting frame 16 and the small soil-cutting frame 15 are moved up and reset, and a square experimental soil layer is intercepted in the small soil-cutting frame 15.

[0040] By starting the third hydraulic cylinder 23, the earth-breaking head 21 and the rectangular jacking pipe 22 can be driven into the small soil frame 15 through the guide port and the jacking port 20, and then pushed into the experimental soil. The displacement range of the soil surface can be detected by multiple vibrating-wire displacement meters 13, and the multiple pressure sensors 14 can detect the extrusion state of the soil on both sides of the rectangular jacking pipe 22, so as to carry out a simulation experiment.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A test device for simulating the entire process of rectangular pipe jacking construction, comprising a base (1), It is characterized in that The base (1) is provided with a mounting opening, in which a large soil-cutting frame (16) and a small soil-cutting frame (15) that can move up and down are mounted, the large soil-cutting frame (16) and the small soil-cutting frame (15) are butt-jointed, a vertical soil-cutting plate (11) that can move up and down is mounted at the butt joint of the large soil-cutting frame (16) and the small soil-cutting frame (15), a mounting plate (5) that can move up and down is mounted in the large soil-cutting frame (16), a movable plate (6) that can move back and forth is mounted at the bottom of the mounting plate (5), a storage groove (38) is mounted in the mounting plate (5), a transverse soil-cutting plate (33) that can move horizontally into the small soil-cutting frame (15) is mounted in the storage groove (38), a mounting groove (29) is mounted at the bottom of the movable plate (6), a soil collecting mechanism is mounted in the mounting groove (29), and a soil collecting mechanism that can be inserted into the soil-cutting frame (15) is mounted on the right side of the base (1). A rectangular jacking mechanism, wherein a top plate (2) is fixedly connected to a base (1) via two support plates (25), a soil disturbance detection mechanism being installed at the bottom of the top plate (2); the soil collection mechanism comprising a rotating rod (27) rotatably connected to a mounting groove (29), a plurality of rows of soil-breaking rods (28) and a plurality of soil-scraping covers (26) being fixedly connected in the circumferential direction of the rotating rod (27), the soil-scraping covers (26) being arranged between two adjacent rows of soil-breaking rods (28); a second motor capable of driving the rotating rod (27) to rotate is installed on the movable plate (6), a collecting groove (34) is provided on the rear inner wall of the mounting groove (29), a horizontal screw conveyor (36) is installed in the collecting groove (34), an output cylinder (3) extending into the collecting groove (34) is fixedly connected to the left end of the movable plate (6), a vertical screw conveyor (37) is installed in the output cylinder (3).

2. A test device for simulating the entire process of rectangular pipe jacking construction according to claim 1, It is characterized in that A plurality of universal wheels (24) are mounted on the bottom of the base (1).

3. A test device for simulating the entire process of rectangular pipe jacking construction according to claim 1, It is characterized in that Vertically arranged guide rails (18) are fixedly installed at the corners of the large soil-cutting frame (16) and the small soil-cutting frame (15), and the inner wall of the installation opening is adapted to fit the guide rails.

4. A test device for simulating the entire process of rectangular pipe jacking construction according to claim 1, It is characterized in that Two first hydraulic cylinders (4) are mounted on the top plate (2), the telescopic ends of the two first hydraulic cylinders (4) are fixedly connected to connecting plates (19), and the two connecting plates (19) are respectively fixedly connected to the side walls of the large soil cutting frame (16) and the small soil cutting frame (15).

5. A test device for simulating the entire process of rectangular pipe jacking construction according to claim 1, It is characterized in that A bracket (9) is mounted on the top plate (2), a second hydraulic cylinder (8) is mounted on the bracket (9), a telescopic end of the second hydraulic cylinder (8) is fixedly connected to a butt plate (7), a top of the vertical earth-cutting plate (11) passes through the top plate (2) and is fixedly connected to the butt plate (7), a bottom of the butt plate (7) is also fixedly connected to two connecting rods (10), a lower end of the two connecting rods (10) passes through the top plate (2) and is fixedly connected to the mounting plate (5), and a guide groove (17) adapted to the vertical earth-cutting plate (11) is provided at a joint between the large earth-cutting frame (16) and the small earth-cutting frame (15).

6. A test device for simulating the entire process of rectangular pipe jacking construction according to claim 1, It is characterized in that A threaded rod (32) is rotatably connected in the storage groove (38), a first motor (31) is mounted on the mounting plate (5) and can drive the threaded rod (32) to rotate, a push plate (35) is threadedly connected to the threaded rod (32), one end of the transverse earth-cutting plate (33) is fixedly connected to the push plate (35), and a side wall of the vertical earth-cutting plate (11) is provided with a strip opening (12) for the transverse earth-cutting plate (33) to pass through.

7. A test device for simulating the entire process of rectangular pipe jacking construction according to claim 1, It is characterized in that The rectangular jacking pipe insertion mechanism comprises a third hydraulic cylinder (23) mounted on the right side end of the base (1); the telescopic end of the third hydraulic cylinder (23) is fixedly connected to the rectangular jacking pipe (22); a breaker head (21) is mounted on the front end of the rectangular jacking pipe (22); a guide opening for the breaker head (21) and the rectangular jacking pipe (22) to pass through is provided on the right side support plate (25); and a jacking entrance (20) corresponding to the breaker head (21) is provided on the right side of the small soil cutting frame (15).

8. A test device for simulating the entire process of rectangular pipe jacking construction according to claim 1, It is characterized in that The soil disturbance detection mechanism comprises a plurality of vibrating-wire displacement meters (13) installed at the bottom of the top plate (2), and a plurality of pressure sensors (14) are also embedded and installed on the front and rear inner walls of the small soil section frame (15).

9. A test device for simulating the entire process of rectangular pipe jacking construction according to claim 1, It is characterized in that Two forward and backward electric slide rails (30) are installed at the bottom of the mounting plate (5), and the movable plate (6) is installed on the electric slide rails (30).

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