Large-section tunnel construction supporting mechanism

Abstract

The invention provides a large-section tunnel construction supporting mechanism which comprises a ground and a supporting mechanism, and an arch frame is fixedly connected to the ground; the supporting mechanism comprises a plurality of limiting pieces fixedly installed on the ground, the limiting pieces are fixedly connected with connecting rods, connecting plates are fixedly installed at the upper ends of the connecting rods, motors are fixedly installed at the bottoms of the connecting plates, the output ends of the motors penetrate through the connecting plates and are rotationally connected with the connecting plates, the output ends of the motors are connected with driving pieces, and fixing blocks are fixedly installed on the driving pieces. A fixing piece abutting against the arch frame is fixedly installed at the upper end of the fixing block, and supporting pieces abutting against the arch frame are fixedly installed on the two sides of the fixing block. The large-section tunnel construction supporting mechanism can prevent collapse and is convenient to install, and the problems that an existing tunnel support is inconvenient to change the supporting position and inconvenient to install are solved.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction technology, and in particular to a support mechanism for large-section tunnel construction. Background Technology

[0002] Anti-collapse arch support devices for tunnel construction typically consist of columns, diagonal braces, and connecting components. The columns bear the vertical load transmitted from the arch and transfer it to the tunnel foundation, thus supporting the arch and stabilizing the entire structure. By rationally arranging the spacing and number of columns, the pressure borne by the arch can be effectively distributed, ensuring the safety of the tunnel structure. The diagonal braces are mainly used to enhance the stability and lateral force resistance of the structure. They can transfer the lateral force on the arch to the columns, and then from the columns to the foundation, thereby improving the overall support device's ability to resist horizontal loads and preventing the arch from tilting or deforming under lateral forces. At the same time, the triangular structure formed by the diagonal braces, columns, and arch has good stability and can effectively reduce structural deformation and displacement.

[0003] The structural form and connection method of the anti-collapse arch support device for tunnel construction are designed to meet the stable support requirements under specific locations and working conditions. For example, if a steel arch support device is used, the components are connected by welding or high-strength bolts to form a relatively rigid overall structure. This means that if the support position needs to be changed during construction, the entire structure needs to be redesigned and adjusted, which is quite difficult. At the same time, the tunnel construction environment is usually harsh, with problems such as humidity, dust, and noise, which will affect the smooth progress of the installation work. In addition, the geological conditions inside the tunnel may also be complex and variable. For example, encountering fracture zones, water inrush, etc., will bring additional difficulties to the installation of the arch support device. Summary of the Invention

[0004] The present invention aims to provide a large-section tunnel construction support mechanism that can prevent collapse and is easy to install, solving the problems of inconvenience in changing the support position and installation of existing tunnel supports.

[0005] To achieve the above objectives, the present invention employs the following technology: a large-section tunnel construction support mechanism, comprising a ground surface and a support mechanism, characterized in that: an arch frame is fixedly connected to the ground surface; the support mechanism includes multiple limiting members fixedly installed on the ground surface, each limiting member being fixedly connected to a connecting rod, a connecting plate being fixedly installed at the upper end of the connecting rod, a motor being fixedly installed at the bottom of the connecting plate, the output end of the motor passing through the connecting plate and rotatably connected thereto, a driving member being connected to the output end of the motor, a fixing block being fixedly installed on the driving member, a fixing member abutting against the arch frame being fixedly installed at the upper end of the fixing block, and support members abutting against the arch frame being fixedly installed on both sides of the fixing block.

[0006] Preferably, the limiting component includes multiple threaded grooves provided on the ground, a connecting block is fixedly installed at the bottom of the connecting rod, a threaded bolt is threadedly connected in the threaded groove, and the threaded bolt passes through the connecting block and is threadedly connected to it.

[0007] Preferably, the driving component includes a slide tube fixedly mounted on the upper end of the connecting plate, and a mounting block slidably connected inside the slide tube and slidingly abutting against the inner wall of the slide tube; the mounting block is provided with a threaded through hole, the threaded through hole is provided through the mounting block, the mounting block is fixedly connected to the fixing block, and a threaded rod threadedly connected to the threaded through hole is fixedly mounted at the motor output end.

[0008] Preferably, the arch frame includes an upward-arching arc-shaped top wall and two side walls supported at both ends of the arc-shaped top wall. The upper end of the inner surface of the side walls is provided with a side wall step, and the lower end of the outer circumference of the arc-shaped top wall is provided with an inverted top wall step. The side wall steps and the top wall steps overlap each other, which increases the reliability of the side wall connection.

[0009] Preferably, the fixing member includes a fixing rod fixedly installed on the upper end of the fixing block, and a limiting plate that abuts against the arch frame is fixedly installed on the upper end of the fixing rod.

[0010] Preferably, the support includes two fixed plates fixedly mounted on a fixed block, a mounting rod located between the two fixed plates is fixedly mounted on the fixed plate, and a rotating block rotatably connected to the mounting rod is sleeved on the mounting rod.

[0011] Preferably, a support plate is slidably connected to the arch frame, two upright plates are fixedly installed on the support plate, a crossbar is fixedly installed on the upright plate between the two upright plates, a transmission block is sleeved on the crossbar and rotatably connected to it, and a drive rod is fixedly installed on the rotating block and the transmission block between the rotating block and the transmission block.

[0012] Preferably, the driving component includes a slide tube fixedly mounted on the upper end of a connecting plate, a mounting block slidably connected inside the slide tube and slidingly abutting against the inner wall of the slide tube, the mounting block having a threaded through hole, the mounting block being fixedly connected to a fixed block, the mounting block having an inner cavity, the motor output end being connected to a threaded rod and a drive shaft fixedly connected through the threaded rod via a first clutch, the threaded rod being threadedly connected in the threaded through hole, the drive rod including a cylinder body with a blind end fixed to a transmission block, a piston slidably connected in the cylinder body, and a piston rod with one end passing through the open end of the cylinder body and connected to the piston, the other end of the piston rod being fixed to the rotating block, the piston is isolating a sealed cavity in the cylinder body, the sealed cavity having an exhaust valve, the piston rod having an air supply channel communicating with the sealed cavity through the piston, a booster pump being provided in the inner cavity, the outlet end of the booster pump being connected to the inlet end of the air supply channel via a flexible air supply pipe, and the drive shaft being connected to the power input shaft of the booster pump via a second clutch. This technical solution allows the drive rod to extend and retract when the curvature of the arch frame varies and the angle of the drive rod varies, thus working in conjunction with the fixing components to support the arch frame. In use, the first external threaded pipe drives the fixing block to rise and fall, thereby supporting the arch frame. Then, the angle of the drive rod is adjusted to meet the requirements. The first clutch disengages, the second clutch engages, and the drive shaft drives the air pump to supply air to the sealed cavity, causing the drive rod to extend and support the arch frame. It offers good versatility and a compact structure.

[0013] Preferably, the system also includes an externally threaded tube passing through the threaded rod and a threaded sleeve threadedly connected to the externally threaded tube. The externally threaded tube is connected to the output end of the motor via a third clutch. The threaded sleeve is located within the inner cavity. The rotating block is fixed to one end of the drive handle, and the other end of the drive handle is movably connected to the threaded sleeve. In use, the third clutch is engaged, and the threaded sleeve is driven to rise and fall via the second externally threaded tube. The threaded sleeve drives the drive handle to rotate around the mounting rod, causing the drive rod to rotate synchronously, thereby adjusting the angle of the drive rod. This is a technical solution that uses a common motor to adjust the angle of the drive rod.

[0014] Preferably, the threaded sleeve has a pivot pin on its exterior, and the drive handle has an elongated hole extending along the extension direction of the drive handle. The pivot pin passes through the elongated hole and is parallel to the mounting rod. This provides a specific technical solution for the movable connection between the drive handle and the threaded sleeve.

[0015] Beneficial effects: By setting up a support mechanism and utilizing the cooperation between the limiting component and the connecting plate, the installation and disassembly of the support mechanism can be completed quickly, avoiding a lot of wasted time, improving work efficiency, and avoiding affecting the progress of subsequent work. At the same time, by utilizing the cooperation between the driving component, the fixing component and the support component, the arch frame can be supported quickly, and the position of the side support can be changed quickly, which is convenient to meet the support needs under different conditions and improves the efficiency of support work. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of Embodiment 1 of the present invention; Figure 2 This is a cross-sectional view of Embodiment 1 of the present invention; Figure 3 This is a side sectional view of Embodiment 1 of the present invention; Figure 4 for Figure 2 Enlarged view of point A in the middle; Figure 5 for Figure 2 Enlarged view of point B in the middle; Figure 6 for Figure 3 Enlarged view of point C in the middle; Figure 7 This is a schematic diagram of Embodiment 2 of the present invention; Figure 8 for Figure 7 Enlarged view of point D in the middle; Figure 9 for Figure 7 Enlarged view of point E in the middle; Figure 10 for Figure 7 An enlarged schematic diagram of point F in the diagram.

[0017] In the diagram: 1. Ground; 2. Arch frame; 3. Motor; 4. Fixing block; 5. Connecting block; 6. Connecting rod; 7. Fixing rod; 8. Limiting plate; 9. Connecting plate; 10. Support plate; 11. Crossbar; 12. Transmission block; 13. Drive rod; 14. Mounting rod; 15. Rotating block; 16. Fixing plate; 17. Vertical plate; 18. Mounting block; 19. Sliding tube; 20. Threaded rod; 21. Threaded through hole; 22. Threaded bolt; 23. Threaded groove; 24. Arc-shaped top wall; 25. Side wall; 26. Side wall step; 27. Top wall step; 28. Inner cavity; 29. ​​First clutch; 30. Motor output end; 31. Drive shaft; 31. Cylinder body; 32. Piston; 33. Piston rod; 34. Sealing cavity; 35. Exhaust valve; 36. Air supply channel; 37. Booster pump; 38. Flexible air supply pipe; 39. Second clutch; 40. External threaded pipe; 41. Threaded sleeve; 42. Third clutch; 43. Drive handle; 44. Shaft pin; 45. Long hole; 46. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1, see Figures 1 to 6 A large-section tunnel construction support mechanism includes a ground surface 1 and a support mechanism. An arch frame 2 is fixedly connected to the ground surface 1. The support mechanism includes multiple limiting components fixedly installed on the ground surface 1. Each limiting component includes multiple threaded grooves 23 provided on the ground surface 1. A connecting block 5 is fixedly installed at the bottom of a connecting rod 6. A threaded bolt 22 is threadedly connected to the threaded groove 23. The threaded bolt 22 passes through the connecting block 5 and is threadedly connected to it. The connecting block 5 is provided with a groove that is opposite to the threaded bolt 22. A connecting rod 6 is fixedly connected to a limiting component. A connecting plate 9 is fixedly installed at the upper end of the connecting rod 6. A motor 3 is fixedly installed at the bottom of the connecting plate 9. The output end of the motor 3 passes through the connecting plate 9 and is rotatably connected to it. A driving component is fixedly connected to the output end of the motor 3 and is fixedly connected to the connecting plate 9. The driving component includes a slide tube 19 fixedly installed at the upper end of the connecting plate 9. An installation block 18 is slidably connected inside the slide tube 19 and slides against the inner wall of the slide tube 19. A threaded through hole 21 is provided on the installation block 18. The threaded through hole 21 passes through the installation block 18. The installation block 18 is fixedly connected to the fixing block 4. A threaded rod 20 that is threadedly connected to the threaded through hole 21 is fixedly installed at the output end of the motor 3. During installation, the groove and the threaded groove 23 are positioned opposite each other. The threaded bolt 22 is inserted into the groove and screwed in. The threaded bolt 22 rotates and moves along the direction of the threaded groove 23, thus connecting with the inner wall of the threaded groove 23, thereby completing the installation of the connecting block 5 and the support mechanism. During disassembly, the threaded bolt 22 is screwed in and rotates along the direction of the threaded groove 23. When the threaded bolt 22 moves out of the threaded groove 23, the connecting block 5 is no longer limited and can be disassembled, thus completing the disassembly of the support mechanism. During operation, the motor 3 is turned on, and the output end of the motor 3 drives the threaded rod 20 to rotate. Since the mounting block 18 slides against the inner wall of the slide tube 19 and cannot rotate, the rotation of the threaded rod 20 will drive the non-rotating mounting block 18 to move. The mounting block 18 will drive the fixing block 4 to move, the fixing block 4 will drive the fixing rod 7 to move, and the fixing rod 7 will drive the limiting plate 8 to move and abut against the arch frame 2, thereby supporting the arch frame 2. The arch frame includes an upward-arching curved top wall 24 and two side walls 25 supported at both ends of the curved top wall, which are welded together with the curved top wall.

[0020] A fixed block 4 is fixedly installed on the drive component. A fixing member that abuts against the arch frame 2 is fixedly installed on the upper end of the fixed block 4. The fixing member includes a fixing rod 7 fixedly installed on the upper end of the fixed block 4. A limiting plate 8 that abuts against the arch frame 2 is fixedly installed on the upper end of the fixing rod 7. Support members that abut against the arch frame 2 are fixedly installed on both sides of the fixed block 4. The support members include two fixing plates 16 fixedly installed on the fixed block 4. An installation rod 14 located between the two fixing plates 16 is fixedly installed on the fixing plate 16. A rotating block 15 rotatably connected to the installation rod 14 is sleeved on the installation rod 14. A support plate 10 is slidably connected to the arch frame 2. Two upright plates 17 are fixedly installed on the support plate 10. A crossbar 11 located between the two upright plates 17 is fixedly installed on the upright plate 17. A transmission block 12 rotatably connected to the crossbar 11 is sleeved on the crossbar 11. A drive rod 13 located between the rotating block 15 and the transmission block 12 is fixedly installed on the rotating block 15 and the transmission block 12. During operation, opening the drive rod 13 causes the transmission block 12 to move, which in turn moves the crossbar 11. The crossbar 11 then moves the upright plate 17, which in turn moves the support plate 10. The support plate 10 then comes into contact with the arch frame 2. This contact causes the upright plate 17 to rotate around the crossbar 11, ensuring the support plate 10 is in close contact with the arch frame 2 and guaranteeing the stability of the support. When the support position needs to be changed, the drive rod is opened... Rod 13, the drive rod 13 will drive the rotating block 15 to rotate around the mounting rod 14, the drive rod 13 will drive the transmission block 12 to move, the transmission block 12 will drive the crossbar 11 to move, the crossbar 11 will drive the upright plate 17 to move, the upright plate 17 will drive the support plate 10 to move, the support plate 10 will move and abut against the arch frame 2, the support plate 10 and the arch frame 2 will abut against each other and drive the upright plate 17 to rotate around the crossbar 11, so that the support plate 10 and the arch frame 2 are in contact, thereby completing the change of the support position.

[0021] Working principle: When working, when motor 3 is turned on, the output end of motor 3 will drive the threaded rod 20 to rotate. Since the mounting block 18 cannot rotate due to sliding contact with the inner wall of the slide tube 19, the rotation of the threaded rod 20 will drive the non-rotating mounting block 18 to move. The mounting block 18 will drive the fixed block 4 to move. The fixed block 4 will drive the fixed rod 7 to move. The fixed rod 7 will drive the limiting plate 8 to move and contact the arch frame 2, thereby supporting the arch frame 2. When the drive rod 13 is turned on, the drive rod 13 will drive the transmission block 12 to move. The transmission block 12 will drive the crossbar 11 to move. The crossbar 11 will drive the vertical plate 17 to move. The vertical plate 17 will drive the support plate 10 to move. The movement of the support plate 10 will contact the arch frame 2. The contact between the support plate 10 and the arch frame 2 will cause the vertical plate 17 to rotate around the crossbar 11, thereby making the support plate 10 fit with the arch frame 2 and ensuring the stability of the support. When the support position needs to be changed, the drive rod 13 is opened. The drive rod 13 will drive the rotating block 15 to rotate around the mounting rod 14. The drive rod 13 will drive the transmission block 12 to move. The transmission block 12 will drive the crossbar 11 to move. The crossbar 11 will drive the upright plate 17 to move. The upright plate 17 will drive the support plate 10 to move. The support plate 10 will abut against the arch frame 2. The abutment between the support plate 10 and the arch frame 2 will drive the upright plate 17 to rotate around the crossbar 11, thereby making the support plate 10 fit against the arch frame 2, thus completing the change of the support position. During installation, the groove and the threaded groove 23 are positioned opposite each other. The threaded bolt 22 is inserted into the groove and screwed in. The threaded bolt 22 rotates and moves along the direction of the threaded groove 23, thus connecting with the inner wall of the threaded groove 23. This completes the installation of the connecting block 5 and the support mechanism. During disassembly, the threaded bolt 22 is screwed in and rotates along the direction of the threaded groove 23. When the threaded bolt 22 moves out of the threaded groove 23, the connecting block 5 is no longer limited and can be disassembled, thus completing the disassembly of the support mechanism.

[0022] Example 2 differs from Example 1 in that: See Figures 7 to 9 The upper end of the inner surface of the side wall is provided with a side wall step 26, and the lower end of the outer circumference of the arc-shaped top wall is provided with an inverted top wall step 27. The side wall step and the top wall step overlap together. The mounting block has an inner cavity 28, and the threaded rod is connected to the motor output end 30 through the first clutch 29. The motor output end is fixedly connected to a drive shaft 31 that passes through the threaded rod. The drive rod includes a cylinder 32 with its blind end fixed to the transmission block, a piston 33 that is sealed and slidably connected to the cylinder, and a piston rod 34 with one end passing through the opening end of the cylinder and connected to the piston. The other end of the piston rod is fixed to the rotating block. The piston isolates a sealed cavity 35 in the cylinder. The sealed cavity is provided with an exhaust valve 36 (an electric valve). The piston rod is provided with an air supply channel 37 that passes through the piston and communicates with the sealed cavity. A booster pump 38 is provided in the inner cavity. The outlet end of the booster pump is connected to the inlet end of the air supply channel through a flexible air supply pipe 39. The drive shaft is connected to the power input shaft of the booster pump through the second clutch 40. In use, the fixed block is raised and lowered by the first external threaded pipe, so that the fixed part supports the arch frame. Then, the angle of the drive rod is adjusted to meet the requirements. The first clutch is disengaged and the second clutch is engaged, so that the drive shaft drives the air pump to supply air to the sealed cavity, thereby causing the drive rod to extend and support the arch frame.

[0023] It also includes an externally threaded tube 41 passing through the threaded rod and a threaded sleeve 42 threadedly connected to the externally threaded tube. The externally threaded tube is connected to the output end of the motor via a third clutch 43. The threaded sleeve is located in the inner cavity, and the rotating block is fixed to one end of the drive handle 44. The other end of the drive handle is movably connected to the threaded sleeve. Specifically, the threaded sleeve is provided with a pin 45 on its outside, and the drive handle is provided with an elongated hole 46 extending along the extension direction of the drive handle. The pin passes through the elongated hole and is parallel to the mounting rod.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A large cross-section tunnel construction support mechanism comprising a ground surface and a support mechanism, characterized by, The ground is fixedly connected with an arch frame; the support mechanism comprises a plurality of limiting members fixedly installed on the ground, the limiting members are fixedly connected with connecting rods, the upper ends of the connecting rods are fixedly installed with connecting plates, the bottoms of the connecting plates are fixedly installed with motors, the output ends of the motors penetrate through the connecting plates and are rotationally connected therewith, the output ends of the motors are connected with driving members, the driving members are fixedly installed with fixed blocks, the upper ends of the fixed blocks are fixedly installed with fixed members abutting against the arch frame, and the two sides of the fixed blocks are fixedly installed with support members abutting against the arch frame.

2. The large cross-section tunnel construction support mechanism according to claim 1, wherein The limiting members comprise a plurality of threaded grooves arranged on the ground, the bottoms of the connecting rods are fixedly installed with connecting blocks, threaded bolts are threadedly connected in the threaded grooves and penetrate through the connecting blocks and are threadedly connected therewith.

3. The support mechanism for large cross-section tunnel construction according to claim 1, wherein The driving members comprise sliding pipes fixedly installed on the upper ends of the connecting plates, the sliding pipes are slidably connected with mounting blocks abutting against the inner walls of the sliding pipes; the mounting blocks are provided with threaded holes penetrating through the mounting blocks, the mounting blocks are fixedly connected with the fixed blocks, and the output ends of the motors are fixedly installed with threaded rods threadedly connected with the threaded holes.

4. The large cross-section tunnel construction support mechanism according to claim 1, wherein The arch frame comprises an arc-shaped top wall arched upward and two side walls supported at the two ends of the arc-shaped top wall, the upper ends of the inner surfaces of the side walls are provided with side wall part steps, the lower ends of the outer circumferential surfaces of the arc-shaped top wall are provided with inverted top wall part steps, and the side wall part steps and the top wall part steps are lapped together.

5. The large cross-section tunnel construction support mechanism according to claim 1, wherein The fixed members comprise fixed rods fixedly installed on the upper ends of the fixed blocks, and the upper ends of the fixed rods are fixedly installed with limiting plates abutting against the arch frame.

6. The large cross-section tunnel construction support mechanism according to claim 1, wherein The support members comprise two fixed plates fixedly installed on the fixed blocks, the fixed plates are fixedly installed with mounting rods located between the two fixed plates, and the mounting rods are sleeved with rotating blocks rotationally connected therewith.

7. The support mechanism for large cross-section tunnel construction according to claim 6, wherein The arch frame is slidably connected with a support plate, the support plate is fixedly installed with two vertical plates, the vertical plates are fixedly installed with a horizontal rod located between the two vertical plates, the horizontal rod is sleeved with a transmission block rotationally connected therewith, and the transmission block and the rotating block are fixedly installed with a driving rod located between the transmission block and the rotating block.

8. The support mechanism for large cross-section tunnel construction according to claim 7, wherein The driving members comprise sliding pipes fixedly installed on the upper ends of the connecting plates, the sliding pipes are slidably connected with mounting blocks abutting against the inner walls of the sliding pipes, the mounting blocks are provided with threaded holes, the mounting blocks are fixedly connected with the fixed blocks, the mounting blocks are provided with cavities, the output ends of the motors are connected with threaded rods through a first clutch and are fixedly connected with driving shafts penetrating through the threaded rods, the threaded rods are threadedly connected in the threaded holes, the driving rod comprises a cylinder body with one end fixedly connected with the transmission block, a piston sealingly and slidably connected in the cylinder body, and a piston rod with one end penetrating through an opening end of the cylinder body and being connected with the piston, the other end of the piston rod is fixedly connected with the rotating block, the piston separates a sealed cavity in the cylinder body, the sealed cavity is provided with an exhaust valve, the piston rod is provided with a gas conveying channel penetrating through the piston and being in communication with the sealed cavity, a booster gas pump is arranged in the cavity, the outlet end of the booster gas pump is connected with the inlet end of the gas conveying channel through a soft gas conveying pipe, and the driving shaft is connected with a power input shaft of the booster gas pump through a second clutch.

9. The support mechanism for large cross-section tunnel construction according to claim 8, wherein It also comprises an outer threaded pipe arranged in the threaded rod and a threaded sleeve threadedly connected to the outer threaded pipe, the outer threaded pipe is connected to the output end of the motor through a third clutch, the threaded sleeve is located in the inner cavity, the rotating block is fixed to one end of a driving handle, the other end of the driving handle is movably connected to the threaded sleeve.

10. The large cross-section tunnel construction support mechanism according to claim 9, wherein The threaded sleeve is externally provided with a shaft pin, the driving handle is provided with a long hole extending along the extending direction of the driving handle, the shaft pin is arranged in the long hole, and the shaft pin is parallel to the mounting rod.

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