Hydraulic engineering tunnel excavation supporting device

Abstract

The utility model relates to the technical field of hydraulic engineering, in particular to a hydraulic engineering tunnel excavation supporting device. The device comprises a horizontally-arranged bottom plate, a vertical supporting column arranged on the bottom plate, a mounting plate horizontally arranged at the upper end of the supporting column, a first fixing piece arranged on the upper plate face of the mounting plate and a second fixing piece amplified by the first fixing piece in an equal proportion. The mounting cylinders are arranged between the first fixing part and the second fixing part, the mounting cylinders communicate with the surfaces of the first fixing part and the second fixing part, telescopic rods are coaxially arranged in the mounting cylinders, and arc-shaped top plates are arranged at the ends of the telescopic rods; and the effect of carrying out supporting operation on different positions in the tunnel is achieved.

Description

Technical Field

[0001] This application relates to the field of water conservancy engineering technology, and in particular to a support device for tunnel excavation in water conservancy engineering. Background Technology

[0002] Currently, water conservancy projects are a general term for various engineering constructions undertaken to control, utilize, and protect surface and underground water resources and the environment. In water conservancy projects, closed water conveyance channels, called hydraulic tunnels, are often excavated through mountains for water conveyance or flood discharge. During the excavation of tunnels, support devices are needed to support the inner walls of the tunnels.

[0003] The existing support device includes a base plate, a support column vertically fixed to the base plate, and an integrated arc-shaped support frame fixed to the upper end of the support column. The base plate is set on the ground inside the tunnel, and the support column lifts the support frame so that the arc surface of the support frame abuts against the top of the tunnel. The arc-shaped support frame can provide a more uniform support force.

[0004] The existing technical solutions mentioned above have the following drawbacks: during the tunnel excavation process, due to the irregularity of the tunnel walls, the same support device may not be able to be installed at different locations inside the tunnel, or the surface of the arc-shaped support frame may not be able to contact the inner wall of the tunnel top, resulting in poor support effect. Utility Model Content

[0005] This application provides a tunnel excavation support device for hydraulic engineering, which is used for supporting operations at different locations within a tunnel.

[0006] The above-mentioned technical objective of this application is achieved through the following technical solution:

[0007] A tunnel excavation support device for water conservancy projects includes a horizontally arranged base plate, a vertically arranged support column on the base plate, a horizontally arranged mounting plate on the upper end of the support column, a first fixing member on the surface of the mounting plate and a second fixing member that is proportionally enlarged from the first fixing member, and a plurality of mounting cylinders arranged between the first fixing member and the second fixing member. The mounting cylinders are in communication with the surfaces of the first fixing member and the second fixing member. A telescopic rod is coaxially arranged inside the mounting cylinder, and an arc-shaped top plate is provided at the end of the telescopic rod.

[0008] By adopting the above technical solution, and by setting up a base plate, support columns, mounting plate, first fixing component, second fixing component, mounting cylinder, telescopic rod, and top plate, the base plate and support columns support the mounting plate, and the telescopic rod can drive the top plate to extend and retract, so that the surface of the top plate can abut against the upper inner wall of the tunnel to support the tunnel. The excavated tunnel walls are irregular, and the uniformly made non-adjustable support device has poor support effect at different positions in the tunnel. The telescopic rod can make the support device adjustable, thereby adapting to support operations at different positions in the tunnel and improving the support effect.

[0009] Optionally, a drive cylinder is coaxially rotatably installed inside the mounting cylinder. The drive cylinder is threaded onto the telescopic rod. A bevel gear is coaxially installed on the outer peripheral wall end of the drive cylinder away from the top plate. The bevel gears of adjacent drive cylinders mesh with each other.

[0010] By adopting the above technical solution, and by setting up a drive cylinder, the rotation of the drive cylinder can drive the telescopic rod to extend and retract, and the meshing of the helical bevel gears can make the top plate extend and retract synchronously, without the need to adjust a single telescopic rod, thus improving efficiency.

[0011] Optionally, the top plates are arranged in an alternating pattern, and the centers of all the circles containing the curvature of the top plates coincide.

[0012] By adopting the above technical solution, the top plates are spaced apart and their centers coincide, so that the surface of the top plate away from the drive cylinder is always an arc surface during the extension and retraction process, thereby enhancing the support effect of the support device.

[0013] Optionally, the drive cylinder has an annular thickened portion at the outer peripheral wall end away from the helical bevel gear, and an annular groove is provided on the inner wall of the mounting cylinder. The annular thickened portion is adapted to the annular groove and is rotatably disposed in the annular groove.

[0014] By adopting the above technical solution, and by setting an annular thickened part, the possibility of the drive cylinder separating from the mounting cylinder during rotation can be reduced.

[0015] Optionally, a limiting member is provided at the end of the inner wall of the mounting cylinder away from the drive cylinder, and a limiting groove is provided on the periphery of the telescopic rod along its length direction. The limiting member is adapted to the limiting groove and is slidably disposed in the limiting groove.

[0016] By adopting the above technical solution and setting a limiting component, the possibility of the telescopic rod rotating with the drive cylinder can be reduced.

[0017] Optionally, the support device also includes anchor bolts, which are vertically inserted into the ground inside the tunnel. The upper end of the anchor bolt is machined to form a contraction section, which is passed through the bottom plate and the support column. The contraction section is connected to the support column by bolts.

[0018] By adopting the above technical solution, and by setting anchor bolts, the expansion section of the anchor bolts is located inside the base plate and support column, while the lower section of the anchor bolts is located in the tunnel floor, thereby improving the stability of the support device.

[0019] Optionally, one end of the mounting plate is bolted to the side wall of the mounting plate, and the other end of the reinforcing plate is bolted to the side wall of the support column.

[0020] By adopting the above technical solution and setting up a reinforcing plate, the connection between the support column and the mounting plate can be made more stable, thereby improving the support effect of the support device.

[0021] Optionally, the drive cylinder is provided with annular teeth on its peripheral wall, and a drive motor is provided on the mounting plate. The output shaft end of the drive motor is fitted with a gear, which meshes with the annular teeth. The drive motor is a stepper motor.

[0022] By adopting the above technical solution, and by setting up a drive motor, the drive cylinder is rotated by the drive motor, thereby causing the telescopic rod to extend and retract along the axis of the mounting cylinder. This allows the top plate to press against the upper surface of the tunnel, providing support for the tunnel. The stepper motor has good control performance and can more stably control the extension and retraction of the telescopic rod.

[0023] In summary, this application has the following technical effects:

[0024] 1. By setting up a base plate, support columns, mounting plate, first fixing component, second fixing component, mounting cylinder, telescopic rod, and top plate, the base plate and support columns support the mounting plate, and the telescopic rod can drive the top plate to extend and retract, so that the surface of the top plate can abut against the upper inner wall of the tunnel to support the tunnel. The excavated tunnel wall is irregular, and the uniformly made non-adjustable support device has poor support effect at different positions in the tunnel. The telescopic rod can make the support device adjustable, thereby adapting to support operations at different positions in the tunnel and improving the support effect.

[0025] 2. By setting up a drive cylinder, the rotation of the drive cylinder can drive the telescopic rod to extend and retract, and the meshing of the helical bevel gears can make the top plate extend and retract synchronously, eliminating the need to adjust any one telescopic rod individually and improving efficiency;

[0026] 3. By setting an annular thickened part, the annular thickened part and the slide groove can reduce the possibility of the drive cylinder separating from the mounting cylinder during rotation. Attached Figure Description

[0027] Figure 1 This is a structural diagram of the object of this application;

[0028] Figure 2 This is a structural diagram from another perspective of this application;

[0029] Figure 3This is a structural diagram of the interior of the mounting cylinder in this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Support assembly; 11. Base plate; 111. Mounting hole; 12. Anchor bolt; 121. Retractable section; 13. Support column; 131. Insertion hole; 14. Mounting plate; 15. Reinforcing plate; 2. Telescopic assembly; 21. First fixing member; 211. First mounting section; 212. Second mounting section; 213. Third mounting section; 22. Second fixing member; 221. First enlarged section; 222. Second enlarged section; 223. Third enlarged section; 23. First mounting cylinder; 24. Second mounting cylinder; 25. Third mounting cylinder; 26. Annular groove; 27. Limiting member; 28. Drive cylinder; 281. Annular thickened part; 29. ​​Telescopic rod; 291. Limiting groove; 292. Top plate; 2010. Helical bevel gear; 2011. Drive motor. Detailed Implementation

[0031] The present application will be further described in detail below with reference to the accompanying drawings.

[0032] This application discloses a support device for tunnel excavation in water conservancy projects, referring to... Figure 1 The support device includes a support component 1 and a telescopic component 2. The support component 1 enables the support device to be stably placed inside the tunnel, while the telescopic component 2 enables the support device to be finely adjusted, thereby adapting the support device to support operations at different locations inside the tunnel.

[0033] Reference Figure 2 The support assembly 1 includes a horizontally placed base plate 11, anchor rods 12 vertically inserted into the tunnel floor, support columns 13 vertically installed on the upper surface of the base plate 11, and an installation plate 14 horizontally placed on the upper end of the support columns 13. The base plate 11 is a strip plate, and square installation holes 111 are opened at both ends of the length direction of the base plate 11. The anchor rods 12 are square rods, and the upper section of the anchor rods 12 is machined to form a contraction section 121. The sidewall of the contraction section 121 is parallel to the sidewall of the adjacent anchor rods 12 and is stepped. The contraction section 121 is located on the ground, and the installation holes 111 are adapted to the contraction section 121 and the contraction section 121 is inserted into the installation holes 111. Two support columns 13 are provided. The two support columns 13 are parallel to each other in the length direction and are spaced apart. The two support columns 13 are located at both ends of the upper plate surface of the base plate 11 in the length direction. The lower end face of the support column 13 is provided with a plug hole 131 that is adapted to the shrink section 121. The side walls of the two support columns 13 are provided with circular holes, which connect the side walls of the support column 13 and the plug hole 131.

[0034] Reference Figure 2During the installation of support component 1, the anchor rod 12 is first inserted into the ground inside the tunnel. The base plate 11 is then fitted onto the contraction section 121 through the mounting hole 111. Next, the support column 13 is fitted onto the contraction section 121 through the insertion hole 131, ensuring the lower end face of the support column 13 is flush with the upper surface of the base plate 11. Bolts are inserted into the circular holes. A threaded hole is provided at the corresponding position on the contraction section 121, and the bolt end is threaded into the threaded hole. The support column 13 and the base plate 11 are connected through the contraction section 121 of the anchor rod 12. The surface of the mounting plate 14 is parallel to the base plate 11, and the lower surface of the mounting plate 14 is fixedly connected to the upper end face of the support column 13. A reinforcing plate 15 is bolted to the side wall of the mounting plate 14 and the side wall of the support column 13. The reinforcing plate 15 is a strip plate. One end of the reinforcing plate 15 is attached to the side wall of the mounting plate 14, and the other end of the reinforcing plate 15 is attached to the side wall of the support column 13. The reinforcing plate 15 is set at an angle.

[0035] Combination Figure 1 and Figure 2 The telescopic component 2 includes a first fixing member 21 formed by bending a strip plate four times and a second fixing member 22 that is proportionally enlarged from the first fixing member 21. The first fixing member 21 includes a first mounting section 211 parallel to the surface of the mounting plate 14, two second mounting sections 212 symmetrically inclined on both sides of the first mounting section 211, and two third mounting sections 213 symmetrically inclined on the side of the second mounting sections 212 away from the first mounting section 211. The end of the third mounting section 213 away from the second mounting section 212 is fixed to the surface of the mounting plate 14. The length direction of the first mounting section 211 is perpendicular to the length direction of the mounting plate 14, and the length directions of the second mounting section 212 and the third mounting section 213 are parallel to the length direction of the first mounting section 211.

[0036] Combination Figure 1 and Figure 2 The second fastener 22 includes a first enlarged section 221 whose surface is parallel to the surface of the first mounting section 211, two second enlarged sections 222 symmetrically inclined on both sides of the first enlarged section 221, and two third enlarged sections 223 symmetrically inclined on the side of the second enlarged section 222 away from the first enlarged section 221. The length direction of the first enlarged section 221 is parallel to that of the first mounting section 211. The length direction and surface of the second enlarged section 222 are parallel to the length direction and surface of the second mounting section 212, respectively. The length direction and surface of the third enlarged section 223 are parallel to the length direction and surface of the third mounting section 213, respectively. The end of the third enlarged section 223 away from the second enlarged section 222 is fixedly connected to the surface of the mounting plate 14.

[0037] Combination Figure 1 and Figure 2Multiple mounting cylinders are provided between the first fixing member 21 and the second fixing member 22. A first mounting cylinder 23 with its axis perpendicular to its surface is provided between the first mounting section 211 and the first enlarged section 221. A second mounting cylinder 24 with its axis perpendicular to its surface is provided between the second mounting section 212 and the second enlarged section 222. A third mounting cylinder 25 with its axis perpendicular to its surface is provided between the third mounting section 213 and the third enlarged section 223. The two end faces of the first mounting cylinder 23, the second mounting cylinder 24 and the third mounting cylinder 25 are respectively fixed to the surfaces opposite to the first mounting section 211 and the first enlarged section 221, the second mounting section 212 and the second enlarged section 222, and the third mounting section 213 and the third enlarged section 223. Circular holes connecting the two surfaces of the first mounting section 211, the second mounting section 212, the third mounting section 213, the first enlarged section 221, the second enlarged section 222 and the third enlarged section 223 are opened at corresponding positions.

[0038] Combination Figure 1 and Figure 2 A first mounting cylinder 23 is provided between the first mounting section 211 and the first enlargement section 221. Two second mounting cylinders 24 are provided between the second mounting section 212 and the second enlargement section 222 along their length direction. Two third mounting cylinders 25 are provided between the third mounting section 213 and the third enlargement section 223 along their length direction. The first mounting cylinder 23, the second mounting cylinder 24 and the third mounting cylinder 25 are arranged alternately.

[0039] Combination Figure 1 and Figure 3 A drive cylinder 28 is rotatably disposed inside the first mounting cylinder 23, the second mounting cylinder 24, and the third mounting cylinder 25. The drive cylinder 28 is coaxially disposed with the first mounting cylinder 23, the second mounting cylinder 24, and the third mounting cylinder 25. The end of the drive cylinder 28 away from the second fixing member 22 passes through a circular hole located on the side of the first fixing member 21 opposite to the second fixing member 22. An annular thickened part 281 is provided at the end of the drive cylinder 28 near the outer peripheral wall of the second fixing member 22. An annular groove 26 is provided in the middle of the inner wall of the first mounting cylinder 23, the second mounting cylinder 24, and the third mounting cylinder 25 along the length direction. The annular groove 26 is adapted to the annular thickened part 281, and the annular thickened part 281 is rotatably disposed in the annular groove 26. The annular thickened part 281 and the groove can reduce the possibility of the drive cylinder 28 separating from the mounting cylinder during rotation.

[0040] Combination Figure 1 and Figure 3Each of the first mounting cylinder 23, the second mounting cylinder 24, and the third mounting cylinder 25 has a telescopic rod 29 coaxially arranged inside. The telescopic rod 29 is a round rod. The drive cylinder 28 is threaded onto the telescopic rod 29. The peripheral wall of the telescopic rod 29 has a limiting groove 291. The length direction of the limiting groove 291 is parallel to the axis of the telescopic rod 29. The ends of the inner walls of the first mounting cylinder 23, the second mounting cylinder 24, and the third mounting cylinder 25 away from the drive cylinder 28 are all provided with limiting elements 27. The limiting elements 27 are adapted to the limiting grooves 291 and are slidably arranged in the limiting grooves 291. The limiting elements 27 and the limiting grooves 291 can reduce the possibility that the telescopic rod 29 will rotate with the drive cylinder 28.

[0041] Combination Figure 1 and Figure 3 Each end of the telescopic rod 29 away from the first fixing member 21 is fixed with an arc-shaped top plate 292. The plane of the side wall of the top plate 292 is parallel to the side wall of the mounting plate 14, and the centers of the circles containing the arcs of all the top plates 292 coincide. Each end of the outer peripheral wall of the drive cylinder 28 away from the second fixing member 22 is fitted with a helical bevel gear 2010. The helical bevel gears 2010 of the drive cylinder 28 in the second mounting cylinder 24 mesh with the helical bevel gears 2010 of the drive cylinder 28 in the first mounting cylinder 23, and the helical bevel gears 2010 of the drive cylinder 28 in the third mounting cylinder 25 mesh with the helical bevel gears 2010 of the drive cylinder 28 in the second mounting cylinder 24.

[0042] Combination Figure 1 and Figure 3 A drive motor 2011 is provided on the upper surface of the mounting plate 14. The output shaft of the drive motor 2011 is perpendicular to the surface of the mounting plate 14. A gear is sleeved on the end of the output shaft of the drive motor 2011. A ring tooth is provided on the outer peripheral wall of the drive cylinder 28 on the end face of the first mounting cylinder 23. The gear on the output shaft of the drive motor 2011 meshes with the ring tooth on the drive cylinder 28. The drive motor 2011 is a stepper motor.

[0043] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A support device for tunnel excavation in water conservancy projects, characterized in that: The device includes a horizontally arranged base plate (11), a vertical support column (13) arranged on the base plate (11), a mounting plate (14) horizontally arranged on the upper end of the support column (13), a first fixing member (21) arranged on the upper surface of the mounting plate (14), a second fixing member (22) that is proportionally enlarged from the first fixing member (21), and a plurality of mounting cylinders arranged between the first fixing member (21) and the second fixing member (22). The mounting cylinders are in communication with the surfaces of the first fixing member (21) and the second fixing member (22). A telescopic rod (29) is coaxially arranged inside the mounting cylinder. The end of the telescopic rod (29) is provided with an arc-shaped top plate (292).

2. The tunnel excavation support device for water conservancy projects according to claim 1, characterized in that: A drive cylinder (28) is coaxially rotatably installed inside the mounting cylinder. The drive cylinder (28) is threaded onto the telescopic rod (29). A bevel gear (2010) is coaxially installed on the outer peripheral wall end of the drive cylinder (28) away from the top plate (292). The bevel gears (2010) of adjacent drive cylinders (28) mesh with each other.

3. The tunnel excavation support device for water conservancy projects according to claim 2, characterized in that: The top plates (292) are arranged at intervals and staggered, and the centers of the circles containing the curvatures of all the top plates (292) coincide.

4. The tunnel excavation support device for water conservancy projects according to claim 3, characterized in that: An annular thickened portion (281) is provided at the end of the outer peripheral wall of the drive cylinder (28) away from the helical bevel gear (2010). An annular groove (26) is provided on the inner wall of the mounting cylinder. The annular thickened portion (281) is adapted to the annular groove (26) and the annular thickened portion (281) is rotatably disposed in the annular groove (26).

5. A tunnel excavation support device for water conservancy projects according to claim 4, characterized in that: A limiting member (27) is provided on the inner wall of the mounting cylinder away from the end of the drive cylinder (28). A limiting groove (291) is provided on the periphery of the telescopic rod (29) along its length direction. The limiting member (27) is adapted to the limiting groove (291) and the limiting member (27) is slidably disposed in the limiting groove (291).

6. The tunnel excavation support device for water conservancy projects according to claim 5, characterized in that: The support device also includes an anchor rod (12), which is vertically inserted into the ground inside the tunnel. The upper end of the anchor rod (12) is machined to form a contraction section (121), which is inserted into the bottom plate (11) and the support column (13). The contraction section (121) is connected to the support column (13) by bolts.

7. A tunnel excavation support device for water conservancy projects according to claim 6, characterized in that: The side wall of the mounting plate (14) is fixed to one end of the reinforcing plate (15) by bolts, and the other end of the reinforcing plate (15) is fixed to the side wall of the support column (13) by bolts.

8. A tunnel excavation support device for water conservancy projects according to claim 7, characterized in that: The drive cylinder (28) has annular teeth on its peripheral wall, and the mounting plate (14) has a drive motor (2011) on its upper surface. The output shaft of the drive motor (2011) is fitted with a gear, which meshes with the annular teeth. The drive motor (2011) is a stepper motor.

Images