CN112761653A - Muddy water-soil pressure double-mode switchable shield tunneling simulation test device - Google Patents
Muddy water-soil pressure double-mode switchable shield tunneling simulation test device Download PDFInfo
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- CN112761653A CN112761653A CN202110065234.4A CN202110065234A CN112761653A CN 112761653 A CN112761653 A CN 112761653A CN 202110065234 A CN202110065234 A CN 202110065234A CN 112761653 A CN112761653 A CN 112761653A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/003—Arrangement of measuring or indicating devices for use during driving of tunnels, e.g. for guiding machines
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
- E21D9/124—Helical conveying means therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
Abstract
The invention provides a muddy water-soil pressure dual-mode switchable shield tunneling simulation test device which comprises a soil sample box, a shield machine, a power rotating device and a muddy water circulating system, wherein a sandy soil stratum and a clay stratum are arranged in the soil sample box; the shield machine, the spiral soil discharging device and the slurry circulating system in the scheme can realize real-time adjustment and collection of tunneling parameters, monitoring of surface subsidence and underground displacement, adjustment of slurry performance and slurry discharging and filtering in the process of simulating actual dual-mode shield tunneling, can realize the mutual conversion process from a slurry tunneling mode to an earth pressure tunneling mode and from an earth pressure tunneling mode to a slurry tunneling mode, make up the blank of a dual-mode shield testing device at the present stage, can research the relation between the tunneling parameters of the dual-mode shield and the formation deformation characteristics in the process of tunneling, and provide reference and reference for actual engineering.
Description
Technical Field
The invention relates to the technical field of shield tunnel construction tunneling scientific research test equipment, in particular to a muddy water-soil pressure dual-mode switchable shield tunneling simulation test device.
Background
As urban population is rapidly increased and the available area of the earth surface is increasingly reduced, the problem of urban traffic congestion becomes one of the problems to be solved urgently in China. In addition, with rapid development of economy and improvement of tunnel construction technology in recent years, more and more cities select underground rail transit as a way for urban trips. According to the development and planning of the thirteen-five modern comprehensive transportation system, the mileage of the urban rail transit operation line reaches 6000km in 2020, and China builds a 7395km subway line in the next decade. In the subway construction process, the shield method is widely applied by the advantages of high tunneling speed, high construction automation degree, good safety and the like. In order to simultaneously ensure the tunneling speed of the shield tunneling machine in a mixed stratum, the earth pressure and muddy water dual-mode shield is put into application. In the stratum with higher underground water level and abundant strong permeability, the stability of the stratum can be ensured by adopting slurry shield tunneling, and when the stratum enters the soil stratum with weaker permeability, the soil pressure shield can obtain better tunneling efficiency, so that the double-mode shield can obtain higher tunneling efficiency by selecting proper tunneling modes in different stratums.
The dual-mode shield can obtain good engineering economy and stratum stability. However, the dual-mode shield is just started to be used, the dual-mode shield is not mature in some detailed controls, and particularly the interaction relation between the dual-mode shield mode conversion process and the stratum is not clear, so that a tunneling simulation test device is required to be used for simulating the working process of the dual-mode shield so as to optimize the tunneling parameters of the actual dual-mode shield in construction and reduce the disturbance to the stratum. The tunneling simulation test device in the prior art is generally an earth pressure or muddy water single-mode tunneling simulation test device, cannot simulate the actual construction process of the double-mode shield, cannot carry out deep research on the double-mode shield, and cannot obtain the data basis of the influence on the construction of the double-mode shield.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a muddy water-soil pressure double-mode switchable shield tunneling simulation test device, which solves the problem that the shield tunneling simulation test device in the prior art cannot simulate the actual working state of a double-mode shield tunneling machine.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
the muddy water-soil pressure dual-mode switchable shield tunneling simulation test device comprises a soil sample box, a shield machine, a power rotating device and a muddy water circulating system, wherein a test stratum soil sample is arranged in the soil sample box;
the shield machine comprises a shield shell and a bin body connected with the end surface of the shield shell,
a main shaft and a spiral soil discharging device are arranged in the shield shell, one end of the main shaft penetrates through the bin body and is fixedly connected with a shield cutter head, and the other end of the main shaft is connected with a power rotating device;
the spiral soil discharging device comprises an outer barrel hermetically connected with the bin body and a spiral rod arranged in the outer barrel, wherein a rotor wing used for rolling out soil is arranged on the outer wall of the spiral rod, one end of the spiral rod is positioned in the bin body, and the other end of the spiral rod is connected with the power rotating device; the side wall of the outer cylinder is provided with a soil discharging branch pipe communicated with the interior of the outer cylinder; the soil that the shield constructs the machine and digs the production gets into the storehouse body, takes out soil through the rotor that rotates on the hob, and soil is discharged through the branch pipe that unearths.
The mud-water circulating system comprises a mud inlet pipe, a mud outlet pipe and an air inlet pipe which are communicated with the cabin body, one ends of the mud inlet pipe, the mud outlet pipe and the air inlet pipe are arranged in the shield shell, and the other ends of the mud inlet pipe, the mud outlet pipe and the air inlet pipe are located outside the shield machine.
The test soil sample is filled in a soil sample box layer by layer and compacted, when the device is used for simulating a shield test, a shield machine enters the soil sample box to tunnel the soil sample of a test stratum, when a spiral soil discharger is used for discharging soil, a mud-water circulating system does not work, and a soil pressure tunneling mode is simulated; when the muddy water circulating system starts to work, the spiral unearthing device does not work, muddy water is sent into the bin body, and a muddy water tunneling mode is simulated; the method can realize the process of mutual conversion from a muddy water tunneling mode to an earth pressure tunneling mode and from the earth pressure tunneling mode to the muddy water tunneling mode, makes up the blank of the dual-mode shield test device at the present stage, can research the relation between the tunneling parameters of the shield and the formation deformation characteristics in the tunneling process of the dual-mode shield, provides reference and reference for actual engineering, and solves the problem that the shield simulation test device in the prior art cannot simulate the actual working state of the dual-mode shield machine.
Furthermore, in order to ensure the stability of the bin body pressure, the muddy water pressure and the air pressure in the simulation tunneling process of the test device and ensure the accuracy of the test result, a sealing bearing is arranged between the main shaft and the bin body, and a pressure sensor is arranged in the outer barrel and can monitor and acquire the change of the pressure in real time so as to analyze the data at a later stage. The mud-water circulating system also comprises a sedimentation tank, a slurry mixing tank and a slurry pressing tank which are sequentially communicated, and the communication pipelines among the sedimentation tank, the slurry mixing tank and the slurry pressing tank are all provided with switch valves;
the slurry outlet pipe is communicated with the sedimentation tank, a filter screen is arranged in the sedimentation tank, a stirring motor with adjustable rotating speed is arranged in the slurry mixing tank, and a cleaning pipe is arranged at the bottom of the slurry mixing tank; the mud inlet pipe is communicated with the mud-pressing tank.
Furthermore, a tunnel lining is slidably sleeved on the outer wall of the shield shell, and the tunnel lining is made of stainless steel. After the tunneling test of the shield machine is completed, the tunnel lining can ensure that the shield machine can smoothly exit and the stability of the stratum, the problem that the shield machine cannot exit due to extrusion of a stratum soil sample is avoided, and the tunnel lining can also protect a shield shell from being abraded.
Furthermore, the panel of the soil sample box is made of transparent materials, so that the displacement and sedimentation changes of the test stratum part in the soil sample box can be observed visually conveniently in the tunneling process of the shield tunneling machine; the outer wall of the bottom of the soil sample box is provided with a plurality of ball valves, so that redundant muddy water in the soil sample box can be conveniently discharged after the shield tunneling machine completes a simulation test; a plurality of sampling holes are formed in the side wall of the soil sample box, so that stratum soil samples can be conveniently obtained for analysis after the tunneling test is finished.
Furthermore, a channel for the shield tunneling machine to pass through is formed in a panel of the soil sample box, and a guide flange is arranged on the inner wall of the channel. The guide flange can stabilize the tunneling direction of the shield tunneling machine and also has a supporting effect on the shield tunneling machine.
Furthermore, in order to determine the height of the water level in the soil sample box, a water level barrel communicated with the interior of the soil sample box is arranged on the outer wall of the soil sample box.
Further, as a specific implementation manner of the power rotating device, the power rotating device comprises a driving box body, and one end of the shield shell is fixedly connected with the side wall of the driving box body; a main shaft rotating device and a spiral rod rotating device are arranged in the driving box body, and the main shaft rotating device comprises a radial plunger motor which is connected with a main shaft and is provided with a torque rotating speed sensor; the spiral rod rotating device comprises a stepping motor which is fixedly arranged on the side wall of the driving box body and provided with a torque and rotating speed sensor, and the output end of the stepping motor is connected with the spiral rod. The radial plunger motor and the stepping motor can control the rotating speed according to the torque rotating speed sensor, and further control the tunneling working state of the shield tunneling machine.
Furthermore, the tunneling simulation test device also comprises a frame, the soil sample box is fixedly arranged on the frame, and a linear guide rail is arranged on the frame; the bottom of the driving box body is provided with a supporting seat, and a sliding block which is in sliding connection with the linear guide rail is arranged on the supporting seat. The direction and the torque of the guide flanges on the linear guide rail and the driving box body are stabilized, and the shield tunneling machine is guaranteed to tunnel forwards or retreat backwards along the length direction of the linear guide rail in the moving direction.
Furthermore, a driving device for driving the shield tunneling machine to do linear motion is arranged on the driving box body, the driving device comprises an oil cylinder and a stay wire displacement sensor, the cylinder body of the oil cylinder is fixedly connected with the side wall of the driving box body, and the piston end of the oil cylinder is connected with the side wall of the soil sample box; the body of the stay wire displacement sensor is fixed with the side wall of the soil sample box, and the stay wire end of the stay wire displacement sensor is fixedly connected with the driving box body. The tunneling displacement of the shield tunneling machine can be measured and fed back by a stay wire displacement sensor, and the tunneling speed and the tunneling displacement are further controlled by a driving device.
Further, the piston end of the oil cylinder is hinged with the side wall of the soil sample box. If the piston end of the oil cylinder is distorted, the direction of the tensile force of the oil cylinder piston of the shield machine is changed, so that the shield machine cannot move linearly; and the piston end of the oil cylinder is hinged with the side wall of the soil sample box, so that the shield tunneling machine is ensured to linearly move along the length direction of the track. And a tension and compression sensor is arranged between the piston end of the oil cylinder and the side wall of the soil sample box, and the tension and compression sensor can measure the tension of the oil cylinder borne by the shield tunneling machine, namely the required tunneling force of the shield tunneling machine.
The invention has the beneficial effects that: the shield machine, the spiral soil discharging device and the slurry circulating system in the scheme can realize real-time adjustment and collection of tunneling parameters, monitoring of surface subsidence and underground displacement, adjustment of slurry performance and slurry discharging and filtering in the process of simulating actual dual-mode shield tunneling, can realize the mutual conversion process from a slurry tunneling mode to an earth pressure tunneling mode and from an earth pressure tunneling mode to a slurry tunneling mode, make up the blank of a dual-mode shield testing device at the present stage, can research the relation between the tunneling parameters of the dual-mode shield and the formation deformation characteristics in the process of tunneling, and provide reference and reference for actual engineering.
Drawings
Fig. 1 is a schematic structural diagram of a muddy water-soil pressure dual-mode switchable shield tunneling simulation test device.
Fig. 2 is a left-side view structural schematic diagram of a muddy water-soil pressure dual-mode switchable shield tunneling simulation test device.
Fig. 3 is a schematic diagram of the internal structure of the shield tunneling machine.
Fig. 4 is an enlarged schematic view of a portion a in fig. 3.
FIG. 5 is a schematic view of the structure of the mud water circulating system.
Wherein, 1, a soil sample box; 2. a shield machine; 3. a power rotating device; 4. a shield shell; 5. a bin body; 6. a main shaft; 7. a spiral soil discharging device; 701. an outer cylinder; 702. a helical rod; 703. a unearthed branch pipe; 8. a shield cutter head; 9. a mud inlet pipe; 10. a slurry outlet pipe; 11. an air inlet pipe; 12. sealing the bearing; 13. lining the tunnel; 14. a ball valve; 15. a sampling hole; 16. a channel; 17. a guide flange; 18. a water level cylinder; 19. a driving box body; 20. a radial piston motor; 21. a stepping motor; 22. a frame; 23. a linear guide rail; 24. a supporting seat; 25. a slider; 26. an oil cylinder; 27. a pull wire displacement sensor; 28. a tension and compression sensor; 29. a sedimentation tank; 30. a slurry mixing tank; 31. a mud pressing pool; 32. an on-off valve; 33. filtering with a screen; 34. a stirring motor; 35. and (5) cleaning the tube.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in fig. 1 to 5, the invention provides a muddy water-soil pressure dual-mode switchable shield tunneling simulation test device, which comprises a soil sample box 1, a shield machine 2, a power rotating device 3 and a muddy water circulating system, wherein a test stratum soil sample is arranged in the soil sample box 1, the shield machine 2 is used for excavating the soil sample in the soil sample box 1, and the power rotating device is used for driving the shield machine 2 to rotate;
the panel of the soil sample box 1 is made of transparent materials, so that the change of a test stratum soil sample in the soil sample box 1 in the tunneling process of the shield tunneling machine 2 can be observed visually; the outer wall of the bottom of the soil sample box 1 is provided with a plurality of ball valves 14, so that redundant muddy water in the soil sample box 1 can be conveniently discharged after the shield tunneling machine 2 completes a simulation test; a plurality of sampling holes 15 are formed in the side wall of the soil sample box 1, so that stratum soil samples can be conveniently obtained for analysis after the tunneling test is finished.
A channel 16 for the shield tunneling machine 2 to pass through is formed in the panel of the soil sample box 1, and a guide flange 17 is arranged on the inner wall of the channel 16. The guide flange 17 can stabilize the driving direction of the shield machine 2 and also support the shield machine 2. The outer wall of the soil sample box 1 is provided with a water level cylinder 18 communicated with the interior of the soil sample box, and the water level height in the soil sample box 1 can be determined through the water level cylinder 18.
The shield tunneling machine 2 comprises a shield shell 4 and a bin body 5 connected with the end face of the shield shell 4, wherein the bin body 5 is used for containing soil and muddy water generated by a shield cutter head 8 in the shield tunneling machine 2 in a tunneling test stratum soil sample; a main shaft 6 and a spiral soil discharging device 7 are arranged in the shield shell 4, one end of the main shaft 6 penetrates through the bin body 5 and is fixedly connected with a shield cutter head 8, and the other end of the main shaft is connected with the power rotating device 3; a sealing bearing 12 is arranged between the main shaft 6 and the cabin body 5, a pressure sensor is arranged in the outer barrel 701 and can monitor the pressure change in real time, so that a tester can timely react when the pressure is abnormal, the stability of the pressure, the muddy water pressure and the air pressure of the cabin body 5 in the simulation tunneling process of the testing device is ensured by the arrangement of the sealing bearing 12, and the stability of a testing result is ensured.
The outer wall of the shield shell 4 is slidably sleeved with a tunnel lining 13, and the tunnel lining 13 is made of stainless steel. After the tunneling test of the shield machine 2 is completed, the tunnel lining 13 can ensure the exit of the shield machine 2 and the stability of the stratum, so that the problem that the shield machine 2 cannot exit due to the extrusion of the stratum soil sample is avoided, and the tunnel lining 13 can also protect the shield shell 4 from being abraded.
The spiral soil discharging device 7 comprises an outer barrel 701 hermetically connected with the bin body 5 and a spiral rod 702 arranged in the outer barrel 701, a rotor wing used for rolling out soil is arranged on the outer wall of the spiral rod 702, one end of the spiral rod 702 is positioned in the bin body 5, and the other end of the spiral rod 702 is connected with the power rotating device 3; the side wall of the outer cylinder 701 is provided with a soil outlet branch pipe 703 communicated with the interior of the outer cylinder 701; soil generated by the tunneling of the shield tunneling machine 2 enters the bin body 5, the soil is taken out by rotating the rotor wing on the spiral rod 702, and the soil is discharged through the soil outlet branch pipe 703.
As a specific embodiment of the power rotating device 3, the power rotating device 3 comprises a driving box body 19, and one end of the shield shell 4 is fixedly connected with the side wall of the driving box body 19; a main shaft 6 rotating device and a spiral rod 702 rotating device are arranged in the driving box body 19, and the main shaft 6 rotating device comprises a radial plunger motor 20 which is connected with the main shaft 6 and is provided with a torque and rotating speed sensor; the spiral rod 702 rotating device comprises a stepping motor 21 which is fixedly arranged on the side wall of the driving box body 19 and is provided with a torque and rotating speed sensor, and the output end of the stepping motor 21 is connected with the spiral rod 702. The radial plunger motor 20 and the stepping motor 21 can control the rotating speed according to the torque rotating speed sensor, so as to control the tunneling working state of the shield tunneling machine 2.
The tunneling simulation test device further comprises a frame 22, the soil sample box 1 is fixedly arranged on the frame 22, and a linear guide rail 23 is arranged on the frame 22; the bottom of the driving box 19 is provided with a support seat 24, and the support seat 24 is provided with a slide block 25 which is connected with the linear guide rail 23 in a sliding way. The linear guide rail 23 and the guide flange 17 on the driving box body 19 stabilize the direction and the torque, and ensure that the moving direction of the shield tunneling machine 2 is tunneled forwards or withdrawn backwards along the length direction of the linear guide rail 23.
A driving device for driving the shield tunneling machine 2 to do linear motion is arranged on the driving box body 19, the driving device comprises an oil cylinder 26 and a stay wire displacement sensor 27, the cylinder body of the oil cylinder 26 is fixedly connected with the side wall of the driving box body 19, and the piston end of the oil cylinder 26 is connected with the side wall of the soil sample box 1; the body of the stay wire displacement sensor 27 is fixed with the side wall of the soil sample box 1, and the stay wire end of the stay wire displacement sensor 27 is fixedly connected with the driving box body 19. The tunneling displacement of the shield tunneling machine 2 can be measured and fed back by the stay wire displacement sensor 27, and the tunneling speed and the tunneling displacement are further controlled by the driving device.
The piston end of the oil cylinder 26 is hinged with the side wall of the soil sample box 1. If the piston end of the oil cylinder 26 is distorted, the direction of the tensile force of the piston of the oil cylinder 26 of the shield tunneling machine 2 is changed, so that the straight line movement cannot be realized; the piston end of the oil cylinder 26 is hinged with the side wall of the soil sample box 1, so that the shield tunneling machine 2 is guaranteed to move linearly along the length direction of the track. A tension and compression sensor 28 is arranged between the piston end of the oil cylinder 26 and the side wall of the soil sample box 1, and the tension and compression sensor 28 can obtain the tension of the oil cylinder 26 on the shield machine 2, namely the required tunneling force of the shield machine 2.
The mud-water circulating system comprises a mud inlet pipe 9, a mud outlet pipe 10 and an air inlet pipe 11 which are communicated with the bin body 5, one ends of the mud inlet pipe 9, the mud outlet pipe 10 and the air inlet pipe 11 are arranged in the shield shell 4, and the other ends of the mud inlet pipe 9, the mud outlet pipe 10 and the air inlet pipe 11 are located outside the shield tunneling machine 2.
The mud-water circulating system also comprises a sedimentation tank 29, a slurry mixing tank 30 and a slurry pressing tank 31 which are sequentially communicated, and the communication pipelines among the sedimentation tank 29, the slurry mixing tank 30 and the slurry pressing tank 31 are provided with switch valves 32; the slurry outlet pipe 10 is communicated with a sedimentation tank 29, a filter screen 33 is arranged in the sedimentation tank 29, a stirring motor 34 with adjustable rotating speed is arranged in the slurry mixing tank 30, and a cleaning pipe 35 is arranged at the bottom of the slurry mixing tank 30; the mud inlet pipe 9 is communicated with the mud jacking tank 31. The filter screen 33 is used for filtering large particles in the slurry outlet pipe 10 and preventing the large particles from entering the slurry mixing tank 30; the stirring motor 34 in the slurry mixing tank 30 uniformly stirs the slurry, the uniformly mixed slurry is sent into the slurry pressing tank 31, and the cleaning pipe 35 is convenient for cleaning the precipitated slurry in the slurry mixing tank 30; the mud pit 31 is used to feed mud into the mud pipe 9.
The test soil sample is filled in the soil sample box 1 in layers and compacted, when the device is used for simulating a shield test, a shield machine 2 enters the soil sample box 1 to tunnel the soil sample of a test stratum, a spiral soil discharger 7 is used for discharging soil, a slurry circulating system does not work, and a soil pressure tunneling mode is simulated; when the muddy water circulating system starts to work, the spiral soil discharging device 7 stops working, muddy water is sent into the bin body 5, and a muddy water tunneling mode is simulated; the method can realize the mutual conversion process from a muddy water tunneling mode to an earth pressure tunneling mode and from the earth pressure tunneling mode to the muddy water tunneling mode, make up the blank of the dual-mode shield test device at the present stage, can research the relation between the tunneling parameters of the shield and the formation deformation characteristics of the dual-mode shield in the tunneling process, provide reference and reference for actual engineering, and solve the problem that the shield simulation test device in the prior art can not simulate the actual working state of the dual-mode shield machine.
Claims (10)
1. A muddy water-soil pressure dual-mode switchable shield tunneling simulation test device is characterized by comprising a soil sample box (1) with a test stratum soil sample arranged inside, a shield machine (2) for excavating the soil sample inside the soil sample box (1), a power rotating device (3) for driving the shield machine (2) to rotate and a muddy water circulating system;
the shield machine (2) comprises a shield shell (4) and a bin body (5) connected with the end face of the shield shell (4), a main shaft (6) and a spiral soil discharger (7) are arranged in the shield shell (4), one end of the main shaft (6) penetrates through the bin body (5) and is fixedly connected with a shield cutter head (8), and the other end of the main shaft is connected with the power rotating device (3);
the spiral soil discharging device (7) comprises an outer barrel (701) connected with the bin body (5) in a sealing mode and a spiral rod (702) arranged in the outer barrel (701), a rotor wing used for rolling out soil is arranged on the outer wall of the spiral rod (702), one end of the spiral rod (702) is located in the bin body (5), and the other end of the spiral rod is connected with the power rotating device (3); the side wall of the outer cylinder (701) is provided with a soil discharging branch pipe (703) communicated with the interior of the outer cylinder;
the mud-water circulating system comprises a mud inlet pipe (9), a mud outlet pipe (10) and an air inlet pipe (11) which are communicated with the cabin body (5), one ends of the mud inlet pipe (9), the mud outlet pipe (10) and the air inlet pipe (11) are arranged in the shield shell (4), and the other ends of the mud inlet pipe (9), the mud outlet pipe (10) and the air inlet pipe (11) are located outside the shield machine (2).
2. The muddy water-soil pressure dual-mode switchable shield tunneling simulation test device according to claim 1, wherein a sealing bearing (12) is arranged between the main shaft (6) and the cabin body (5), and a pressure sensor is arranged in the outer cylinder (701);
the mud-water circulating system also comprises a sedimentation tank (29), a slurry mixing tank (30) and a slurry pressing tank (31) which are sequentially communicated, wherein the communication pipelines among the sedimentation tank (29), the slurry mixing tank (30) and the slurry pressing tank (31) are respectively provided with a switch valve (32);
the slurry outlet pipe (10) is communicated with the sedimentation tank (29), a filter screen (33) is arranged in the sedimentation tank (29), a stirring motor (34) with adjustable rotating speed is arranged in the slurry mixing tank (30), and a cleaning pipe (35) is arranged at the bottom of the slurry mixing tank (30); the mud inlet pipe (9) is communicated with the mud pressing pool (31).
3. The muddy water-soil pressure dual-mode switchable shield tunneling simulation test device according to claim 1, wherein a tunnel lining (13) is slidably sleeved on the outer wall of the shield shell (4), and the tunnel lining (13) is made of stainless steel.
4. The muddy water-soil pressure dual-mode switchable shield tunneling simulation test device according to claim 1, wherein a panel of the soil sample box (1) is made of transparent materials, a plurality of ball valves (14) are arranged on the outer wall of the bottom of the soil sample box (1), and a plurality of sampling holes (15) are formed in the side wall of the soil sample box (1).
5. The muddy water-soil pressure dual-mode switchable shield tunneling simulation test device according to claim 4, characterized in that a channel (16) for the shield tunneling machine (2) to pass through is formed in a panel of the soil sample box (1), and a guide flange (17) is arranged on the inner wall of the channel (16).
6. The mud-water-soil pressure dual-mode switchable shield tunneling simulation test device according to claim 5, characterized in that a water level cylinder (18) communicated with the inside of the soil sample box (1) is arranged on the outer wall of the soil sample box.
7. The muddy water-soil pressure dual-mode switchable shield tunneling simulation test device according to claim 1, wherein the power rotating device (3) comprises a driving box body (19), and one end of the shield shell (4) is fixedly connected with the side wall of the driving box body (19);
a main shaft (6) rotating device and a spiral rod (702) rotating device are arranged in the driving box body (19), and the main shaft (6) rotating device comprises a radial plunger motor (20) which is connected with the main shaft (6) and is provided with a torque and rotating speed sensor; the spiral rod (702) rotating device comprises a stepping motor (21) which is fixedly arranged on the side wall of the driving box body (19) and is provided with a torque and rotating speed sensor, and the output end of the stepping motor (21) is connected with the spiral rod (702).
8. The muddy water-soil pressure dual-mode switchable shield tunneling simulation test device according to claim 7, further comprising a frame (22), wherein the soil sample box (1) is fixedly arranged on the frame (22), and a linear guide rail (23) is arranged on the frame (22); the bottom of the driving box body (19) is provided with a supporting seat (24), and a sliding block (25) which is in sliding connection with the linear guide rail (23) is arranged on the supporting seat (24).
9. The muddy water-soil pressure dual-mode switchable shield tunneling simulation test device according to claim 8, wherein a driving device for driving the shield tunneling machine (2) to move linearly is arranged on the driving box body (19), the driving device comprises an oil cylinder (26) and a stay wire displacement sensor (27), a cylinder body of the oil cylinder (26) is fixedly connected with the side wall of the driving box body (19), and a piston end of the oil cylinder (26) is connected with the side wall of the soil sample box (1); the body of the stay wire displacement sensor (27) is fixed with the side wall of the soil sample box (1), and the stay wire end of the stay wire displacement sensor (27) is fixedly connected with the driving box body (19).
10. The muddy water-soil pressure dual-mode switchable shield tunneling simulation test device according to claim 9, wherein a piston end of the oil cylinder (26) is hinged with a side wall of the soil sample box (1), and a tension and compression sensor (28) is arranged between the piston end of the oil cylinder (26) and the side wall of the soil sample box (1).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107505A (en) * | 2021-05-27 | 2021-07-13 | 西南交通大学 | Multi-mode shield tunneling test research device |
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| CN112761653B (en) | 2022-09-13 |
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