A reinforced grid combined support device for open cut tunnel

Abstract

The utility model discloses a kind of open cut tunnel reinforcing mesh combination support device, including base, support rod, connecting piece and fixed claw.Support rod is connected with base, connecting piece is installed in the top of support rod, the height of connecting piece is adjusted by the telescopic of support rod.Fixed claw is connected with connecting piece, the angle of fixed claw is adjusted by the swing of connecting piece, and fixed claw is used to hold fixed reinforcing mesh.The above-mentioned open cut tunnel reinforcing mesh combination support device, the height of connecting piece is adjusted by the telescopic of telescopic link, the angle of fixed claw is adjusted by the angle of connecting piece, and supporting height and angle can be flexibly adjusted.It can be enhanced the anti-overturning ability of support device by the base of larger area bearing on ground, ensure the stability of support device.The whole device structure is modularized, and component versatility is strong, can be disassembled and reused, save construction cost, and installation is convenient and fast.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, specifically to a steel mesh combined support device for open-cut tunnels. Background Technology

[0002] Cut-and-cover tunnels are a construction method that involves excavating a trench in the ground, constructing the tunnel structure within the trench, and finally backfilling to restore the surface. During construction, to enhance the strength, rigidity, and overall stability of the tunnel structure, especially in critical areas such as the sidewalls and roof, a steel mesh (a network structure formed by crisscrossing steel bars tied or welded at specific intervals) is typically laid. This steel mesh is embedded in the shotcrete or cast-in-place concrete layer, forming a reinforced concrete structure that effectively withstands earth pressure, water pressure, and ground loads, ensuring the tunnel's safety and reliability during construction and operation.

[0003] In the construction of open-cut tunnels and other similar projects, the reinforcing mesh, as an embedded part of the concrete structure, often sinks, bends, or collapses entirely before the concrete is poured due to its own weight, construction disturbance, or material flexibility, posing a significant threat to construction safety and quality. To prevent the reinforcing mesh from sinking, bending, or collapsing, a supporting structure is used to support it.

[0004] Currently, most existing support methods use simple methods such as wooden supports and steel pipe pillars, which have problems such as poor stability, inconvenient installation, and difficulty in flexibly adjusting the support angle and height, and cannot meet the effective support requirements of steel mesh under different sites and complex working conditions. Utility Model Content

[0005] Therefore, it is necessary to provide a steel mesh combined support device for open-cut tunnels, which addresses the problems of poor stability, inconvenient installation, and difficulty in flexibly adjusting the support angle and height of existing support methods.

[0006] A reinforced steel mesh combined support device for open-cut tunnels, comprising: Base; The support rod is connected to the base. A connecting section, installed at the top of the support rod, wherein the extension and retraction of the support rod adjusts the height of the connecting section; and A fixing claw is connected to the connecting section. The swing of the connecting section is used to adjust the angle of the fixing claw, and the fixing claw is used to clamp and fix the reinforcing steel mesh.

[0007] In one embodiment, the base is provided with bolt fixing holes for anchoring to the ground.

[0008] In one embodiment, the base is provided with mounting holes for mounting counterweights.

[0009] In one embodiment, the support rod includes a fixed cylinder, two sets of screws, and a connecting cylinder. The fixed cylinder is mounted on the base, and the two sets of screws are threaded to both ends of the connecting cylinder. One of the screws is installed inside the fixed cylinder, and the connecting cylinder is installed at the top end of the other screw.

[0010] In one embodiment, a reinforcing rib is connected between the fixing cylinder and the base, and a plurality of the reinforcing ribs are evenly distributed along the circumference of the fixing cylinder.

[0011] In one embodiment, the connecting joint includes a seat body, a seat ring, a compression cylinder, and a ball head. The seat body is mounted on the top of the support rod, the seat ring is threaded onto the outside of the seat body, the ball head is disposed inside the seat body, and the connecting rod of the ball head passes through the through hole of the seat ring and connects to the fixing claw. The compression cylinder is disposed inside the seat ring and located between the top wall of the seat ring and the ball head.

[0012] In one embodiment, the fixing claw includes a mounting base and a cover plate. The mounting base is provided with a first receiving groove and a second receiving groove that are perpendicular to each other for accommodating reinforcing bars. The cover plate is connected to the mounting base to close the openings of the first receiving groove and the second receiving groove.

[0013] In one embodiment, a locking element is threaded onto the cover plate, and the locking element is inserted into the communicating area of ​​the first receiving groove and the second receiving groove.

[0014] In one embodiment, a rubber pad layer is installed at the bottom of the base.

[0015] In one embodiment, two adjacent open-cut tunnel steel mesh combination support devices are connected as a whole by crossbars.

[0016] The aforementioned reinforced concrete mesh support device for open-cut tunnels allows for height adjustment of the entire support system by extending and retracting the connecting sections of the telescopic rods. Adjusting the angle of the connecting sections also allows for adjustment of the angle of the fixing claws, enabling flexible adjustment of both the support height and angle. The large base supporting the device on the ground enhances its anti-overturning capacity and ensures its stability. The entire device features a modular structure, highly versatile components, and is disassembled and reused, saving construction costs and allowing for convenient and rapid installation. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1This is a structural schematic diagram of a steel mesh composite support device for an open-cut tunnel in one embodiment; Figure 2 for Figure 1 Top view of the central fixed cylinder mounted on the base; Figure 3 for Figure 1 Half-sectional view of the connecting joint; Figure 4 for Figure 1 Half-sectional view of the middle fixed claw; Figure 5 for Figure 4 Top view of the middle cassette.

[0019] Figure label: 10-Base, 12-Bolt fixing hole, 14-Mounting hole, 20-Support rod, 21-Fixing cylinder, 22-Screw, 23-Connecting cylinder, 24-Reinforcing rib, 30-Connecting section, 31-Seat body, 312-Spherical cavity, 32-Seat ring, 322-Through hole, 33-Extrusion cylinder, 34-Ball head, 342-Connecting rod, 40-Fixing claw, 41-Card holder, 412-First receiving groove, 414-Second receiving groove, 42-Cover plate, 43-Locking element, 50-Rubber pad. Detailed Implementation

[0020] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0023] Please see Figure 1One embodiment of the open-cut tunnel steel mesh combined support device includes a base 10, a support rod 20, a connecting section 30 and a fixing claw 40.

[0024] Please refer to the following: Figure 2 The base 10 rests on the ground, providing reaction force support to ensure the stability of the entire support device. In one embodiment, to enhance the stability of the entire support device, the base 10 is provided with bolt fixing holes 12 for anchoring to the ground. The bolt fixing holes 12 are distributed at the corners of the base 10, and the bolts are anchored to the ground through the bolt fixing holes 12, thereby enhancing the overturning resistance of the support device.

[0025] Furthermore, the base 10 is also provided with mounting holes 14 for mounting counterweights. External counterweights are mounted on the base 10 through the mounting holes 14 to increase the weight of the base 10 and further enhance the overturning resistance of the support device.

[0026] The support rod 20 is connected to the base 10, and the connecting section 30 is installed at the top of the support rod 20. The extension and retraction of the support rod 20 adjusts the height of the connecting section 30, thereby adjusting the height of the entire support device. In one embodiment, the support rod 20 includes a fixed cylinder 21, two sets of screws 22, and a connecting cylinder 23.

[0027] The fixed cylinder 21 is mounted on the base 10. One screw 22 is installed inside the fixed cylinder 21. Two sets of screws 22 are threadedly connected to both ends of the connecting cylinder 23. The connecting section 30 is installed on the top of the other screw 22. The support rod 20 can be extended or retracted by the relative rotation of the connecting cylinder 23 and the screw 22, thus adjusting the length of the support rod 20. The threaded connection of the two sets of screws 22 to the connecting cylinder 23 increases the range of length adjustment for the support rod 20.

[0028] In one embodiment, a reinforcing rib 24 connects the fixing cylinder 21 and the base 10, with multiple reinforcing ribs 24 evenly distributed along the circumference of the fixing cylinder 21. The reinforcing ribs 24 strengthen the connection between the fixing cylinder 21 and the base 10, preventing the fixing cylinder 21 from separating from the base 10 under eccentric loading. In this embodiment, four reinforcing ribs 24 are provided, evenly distributed along the circumference, with an angle of 90° between adjacent reinforcing ribs 24.

[0029] The fixing claw 40 is connected to the connecting section 30. The swinging motion of the connecting section 30 is used to adjust the angle of the fixing claw 40, which is used to clamp and fix the reinforcing steel mesh. The height of the entire support device can be adjusted by extending and retracting the supporting rod 20 to adjust the height of the connecting section 30, and the angle of the fixing claw 40 can be adjusted by adjusting the angle of the connecting section 30, thus allowing for flexible adjustment of the support height and angle.

[0030] Please refer to the following: Figure 3 In one embodiment, the connecting joint 30 includes a seat 31, a seat ring 32, a compression cylinder 33, and a ball head 34. The seat 31 is mounted on the top end of the support rod 20. Specifically, the seat 31 is mounted on the top end of the screw 22. The outer wall of the seat 31 has external threads, and the inner wall of the seat ring 32 has internal threads. The seat ring 32 is threaded onto the outer side of the seat 31.

[0031] The seat body 31 has a spherical cavity 312 inside, and the ball head 34 is movably installed in the spherical cavity 312. The seat ring 32 has a through hole 322, and the connecting rod 342 of the ball head 34 passes through the through hole 322 to the outside and connects with the fixing claw 40. The diameter of the through hole 322 of the seat ring 32 is larger than the diameter of the connecting rod 342. When the ball head 34 moves in the spherical cavity 312, the connecting rod 342 can swing in the through hole 322 to adjust the angle of the fixing claw 40. The extrusion cylinder 33 is disposed in the seat ring 32, and the extrusion cylinder 33 is located between the top wall of the seat ring 32 and the ball head 34.

[0032] When the angle of the fixing claw 40 needs to be adjusted, the seat ring 32 is rotated to gradually move away from the seat body 31. The compression cylinder 33 releases the compression of the ball head 34, allowing the ball head 34 to move freely within the spherical cavity 312, thus adjusting the angle of the fixing claw 40. After the angle of the fixing claw 40 is adjusted, the seat ring 32 is rotated in the opposite direction to gradually fit onto the seat body 31. As the seat ring 32 gradually moves downward onto the seat body 31, it pushes the compression cylinder 33 downward. Finally, the compression cylinder 33 abuts against the ball head 34, pressing and fixing the ball head 34 so that it cannot move freely, thus fixing the angle of the connecting rod 342 and locking the angle of the fixing claw 40.

[0033] Please refer to the following: Figure 4 and Figure 5 In one embodiment, the fixing claw 40 includes a retaining seat 41 and a cover plate 42. The retaining seat 41 is mounted on the connecting joint 30. Specifically, the retaining seat 41 is connected to the connecting rod 342 of the connecting joint 30. The retaining seat 41 has a first receiving groove 412 and a second receiving groove 414, which are perpendicular to each other to accommodate transverse and longitudinal reinforcing bars, respectively. The first receiving groove 412 and the second receiving groove 414 are interconnected, and the connecting area of ​​the first receiving groove 412 and the second receiving groove 414 accommodates the connection node of the reinforcing bar. The cover plate 42 is connected to the retaining seat 41 and is used to close the openings of the first receiving groove 412 and the second receiving groove 414 to prevent the reinforcing bar from coming loose from the first receiving groove 412 and the second receiving groove 414, which would cause the support device to fail.

[0034] In one embodiment, the cover plate 42 and the retaining seat 41 are detachably connected by screws to facilitate the connection and separation of the fixing claw 40 from the reinforcing mesh. Rubber gaskets (not shown) are installed in the first receiving groove 412 and the second receiving groove 414. The rubber gaskets increase the friction between the reinforcing bar and the retaining seat 41, preventing the reinforcing bar from loosening from the first receiving groove 412 and the second receiving groove 414, and also preventing damage to the reinforcing bar. A locking member 43 is installed on the cover plate 42. The locking member 43 is threaded onto the cover plate 42 and inserted into the communicating area of ​​the first receiving groove 412 and the second receiving groove 414. The locking member 43 can press against the connecting nodes of the reinforcing mesh, ensuring the clamping force of the fixing claw 40 on the reinforcing bar, preventing relative sliding between the reinforcing mesh and the fixing claw 40, and ensuring the stability of the support.

[0035] Please refer to it again. Figure 1 In one embodiment, a rubber pad 50 is installed at the bottom of the base 10. The rubber pad 50 provides anti-slip support and ensures the stability of the support device. Two adjacent open-cut tunnel steel mesh combined support devices are connected as a whole by a crossbar (not shown) to form a stable support system and improve the overall rigidity. Specifically, the crossbar connects the support rods 20 of two adjacent support devices, for example, the crossbar connects the fixing cylinders 21 of two support rods 20.

[0036] The aforementioned reinforced steel mesh support device for open-cut tunnels can prevent deformation or collapse of the reinforced steel mesh structure during construction, improving construction safety and the quality of steel reinforcement formation. The height of the entire support device can be adjusted by extending and retracting the connecting section 30 of the support rod 20, and the angle of the fixing claw 40 can be adjusted by adjusting the angle of the connecting section 30, allowing for flexible adjustment of the support height and angle. The large base 10, supported on the ground, enhances the overturning resistance of the support device and ensures its stability. The entire device has a modular structure, highly versatile components, and can be disassembled and reused, saving construction costs. Installation is convenient and quick, making it suitable for confined construction spaces or irregular terrain.

[0037] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A reinforced steel mesh combined support device for open-cut tunnels, characterized in that, include: Base; The support rod is connected to the base. A connecting section is installed at the top of the support rod, and the extension and retraction of the support rod is used to adjust the height of the connecting section; and A fixing claw is connected to the connecting section. The swing of the connecting section is used to adjust the angle of the fixing claw, and the fixing claw is used to clamp and fix the reinforcing steel mesh.

2. The reinforced concrete mesh combined support device for open-cut tunnels according to claim 1, characterized in that, The base is provided with bolt fixing holes for anchoring to the ground.

3. The reinforced concrete mesh combined support device for open-cut tunnels according to claim 1, characterized in that, The base is provided with mounting holes for installing counterweights.

4. The reinforced concrete mesh combined support device for open-cut tunnels according to claim 1, characterized in that, The support rod includes a fixed cylinder, two sets of screws and a connecting cylinder. The fixed cylinder is installed on the base. The two sets of screws are threaded to both ends of the connecting cylinder. One of the screws is installed inside the fixed cylinder, and the connecting cylinder is installed at the top of the other screw.

5. The reinforced concrete mesh combined support device for open-cut tunnels according to claim 4, characterized in that, A reinforcing rib is connected between the fixed cylinder and the base, and multiple reinforcing ribs are evenly distributed along the circumference of the fixed cylinder.

6. The reinforced concrete mesh combined support device for open-cut tunnels according to claim 1, characterized in that, The connecting section includes a seat body, a seat ring, a compression cylinder, and a ball head. The seat body is installed on the top of the support rod, the seat ring is threaded onto the outside of the seat body, the ball head is located inside the seat body, and the connecting rod of the ball head passes through the through hole of the seat ring and connects with the fixing claw. The compression cylinder is located inside the seat ring and between the top wall of the seat ring and the ball head.

7. The reinforced concrete mesh combined support device for open-cut tunnels according to claim 1, characterized in that, The fixing claw includes a mounting base and a cover plate. The mounting base is provided with a first receiving groove and a second receiving groove that are perpendicular to each other for accommodating reinforcing bars. The cover plate is connected to the mounting base to close the openings of the first receiving groove and the second receiving groove.

8. The reinforced concrete mesh combined support device for open-cut tunnels according to claim 7, characterized in that, A locking element is threaded onto the cover plate, and the locking element is inserted into the communicating area between the first receiving groove and the second receiving groove.

9. The reinforced concrete mesh combined support device for open-cut tunnels according to any one of claims 1-8, characterized in that, A rubber pad layer is installed at the bottom of the base.

10. The reinforced concrete mesh combined support device for open-cut tunnels according to any one of claims 1-8, characterized in that, The two adjacent open-cut tunnel steel mesh combination support devices are connected as a whole by crossbars.

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