Anti-blocking tool for bolt hole of side steel plate of tunnel lower guide arch frame

Abstract

An anti-blocking tool for bolt holes of side steel plates of a lower guide arch frame of a tunnel comprises two symmetrically-arranged front connecting plates, the two front connecting plates are attached to the side steel plates on the lower guide arch frame, mounting holes matched with the bolt holes of the side steel plates are formed in the front connecting plates, blocking assemblies are mounted in the mounting holes, and the front connecting plates are connected with the side steel plates through bolts. The blocking assembly is connected with the bolt holes of the side steel plates. According to the design, the front connecting plate is attached to the lower guide arch frame side steel plate, meanwhile, after the mounting hole in the front connecting plate is aligned with the bolt hole, the blocking assembly can be mounted to be connected with the bolt hole to block the bolt hole, in this way, sprayed concrete can be blocked through the front connecting plate and the blocking assembly, and therefore the construction quality is improved; and stability and safety of primary support of the tunnel are ensured.

Description

Technical Field

[0001] This utility model relates to the field of tunnel engineering technology, and in particular to an anti-clogging tool for bolt holes in the side steel plate of the lower guide arch frame in a tunnel. Background Technology

[0002] The timely closure of the initial support ring in tunnels plays a crucial role in stabilizing the surrounding rock and ensuring construction safety. However, during the installation of the invert arch frame and the lower guide arch frame, the bolt holes at the connection between the lower guide arch frame and the invert arch frame may be blocked by the sprayed lower guide concrete. This requires a long time for manual chiseling, which is extremely difficult and greatly prolongs the time for closure ring formation. At the same time, incomplete removal of concrete is likely to occur, resulting in the bolts not functioning properly, reducing the connection quality, and having a significant impact on the safety and quality of construction. Summary of the Invention

[0003] The purpose of this invention is to overcome the defects and problems of bolt hole blockage in the existing technology and to provide an anti-blocking tool for bolt holes on the side steel plates of the tunnel guide arch frame to prevent bolt hole blockage.

[0004] To achieve the above objectives, the technical solution of this utility model is: an anti-clogging tool for bolt holes on the side steel plates of the lower guide arch frame in a tunnel, comprising two symmetrically arranged positive connecting plates, both of which are in contact with the side steel plates on the lower guide arch frame. The positive connecting plates are provided with mounting holes that match the bolt holes of the side steel plates, and a blocking component is installed in the mounting hole. The blocking component is connected to the bolt holes of the side steel plates.

[0005] A top baffle is connected to the upper side of the positive connecting plate. The lower side of the top baffle is in contact with the top surface of the side steel plate. The inner sides of the two top baffles are in contact with the left and right sides of the lower guide arch frame, respectively. Side baffles are connected to the outer sides of the two positive connecting plates. The two side baffles are in contact with the left and right sides of the side steel plate, respectively. The upper side of the side baffle is connected to the lower side of the top baffle.

[0006] The blocking assembly includes a screw and a connecting block. The screw is threaded to the bolt hole and the mounting hole. The connecting block is connected to one end of the screw and abuts against the outside of the positive connecting plate. The size of the connecting block is larger than the size of the screw.

[0007] The screw includes a threaded section and a non-threaded section connected in sequence, and the threaded section is threadedly connected to the bolt hole and the mounting hole.

[0008] The diameter of the non-threaded section is smaller than the diameter of the threaded section.

[0009] A sealing gasket is connected to the outer peripheral surface of the screw near the connecting block.

[0010] The connecting block is rectangular.

[0011] A handle is attached to one side of the positive connecting plate.

[0012] The handle is U-shaped, and the two side walls of the handle are connected to the positive connecting plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model discloses an anti-clogging tool for bolt holes in the side steel plates of a tunnel lower guide arch frame. By setting a positive connecting plate that fits snugly against the side steel plates of the lower guide arch frame, and aligning the mounting holes on the positive connecting plate with the bolt holes, a blocking component can be installed and connected to the bolt holes to block them. In this way, the positive connecting plate and the blocking component can block the sprayed concrete, thereby improving construction quality and ensuring the stability and safety of the initial tunnel support. Therefore, this utility model can prevent bolt hole clogging.

[0015] 2. In this utility model, a tool for preventing blockage of bolt holes in the side steel plate of a tunnel guide arch frame allows the side baffle and top baffle to directly contact the side steel plate, which facilitates the positioning of the positive connecting plate. This allows the mounting holes to be quickly aligned with the bolt holes. Furthermore, the side top plate, top baffle, and positive connecting plate are connected together, resulting in a relatively stable overall structure. Therefore, this utility model offers high stability and ease of use.

[0016] 3. This utility model discloses an anti-clogging tool for bolt holes on the side steel plates of a tunnel guide arch frame. The tool uses a threaded connection to secure the connection between the front connecting plate and the side steel plate, while also preventing concrete from entering the bolt holes. The connecting block prevents concrete from entering the mounting holes. The threaded and non-threaded sections facilitate quick insertion of the screw into the bolt holes. Therefore, this utility model offers high stability and ease of use.

[0017] 4. In this utility model, an anti-clogging tool for bolt holes in the side steel plates of a tunnel guide arch frame is provided. By setting a sealing gasket, concrete leakage can be prevented, and the connecting block can also be buffered. By setting a handle, the positive connecting plate can be quickly removed, and the handle can also support the positive connecting plate, ensuring a tight connection between the positive connecting plate and the side steel plate. Therefore, this utility model has high stability and is easy to use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a structural schematic diagram of the front connecting plate, side baffle, top baffle, lower guide arch frame, and side steel plate of this utility model.

[0020] Figure 3 This is a cross-sectional schematic diagram of the front connecting plate, side baffle, and top baffle of this utility model.

[0021] In the diagram: 1. Side steel plate, 11. Bolt hole, 2. Front connecting plate, 21. Mounting hole, 3. Plug assembly, 31. Screw, 311. Threaded section, 312. Non-threaded section, 32. Connecting block, 33. Sealing gasket, 4. Top baffle, 5. Side baffle, 6. Handle, 7. Lower guide arch. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1:

[0024] See Figures 1 to 3 A tool for preventing blockage of bolt holes in side steel plates of a tunnel guide arch frame includes two symmetrically arranged positive connecting plates 2. Both positive connecting plates 2 are attached to the side steel plates 1 on the lower guide arch frame 7. The positive connecting plates 2 are provided with mounting holes 21 that match the bolt holes 11 of the side steel plates 1. A blocking component 3 is installed in the mounting hole 21 and is connected to the bolt holes 11 of the side steel plates 1.

[0025] In this embodiment, the positive connecting plate 2 uses a 5mm thick steel plate as the main material. The positive connecting plate 2 has a pre-reserved mounting hole 21 with a radius of 11mm. The mounting hole 21 is adjusted according to the specific bolt hole 11 position. The handle 6 uses a 6mm diameter round steel as the main material and is welded to the positive connecting plate 2.

[0026] Before spraying concrete into the lower guide arch, place the positive connecting plate 2 on both sides of the side steel plate 1 of the lower guide arch frame 7, ensuring that the positive connecting plate 2 and the side steel plate 1 are in close contact. Adjust the position so that the mounting holes 21 on the positive connecting plate 2 are aligned with the bolt holes 11 on the side steel plate 1. Then, use the blocking component 3 to fix it. At this point, the conditions for spraying concrete are met. After the spraying concrete is completed, manually pull out the tool as a whole through the handle 6 and store it for recycling. Because this tool was used before spraying concrete, the concrete is "blocked" outside. When the invert arch is excavated, the bolt holes 11 on the side steel plate 1 and the bolt holes on the invert arch connecting plate can be quickly aligned, and the bolts can be inserted well, completing a fast, effective, tight, and reliable high-quality connection.

[0027] Example 2:

[0028] The basic content is the same as in Example 1, except that:

[0029] See Figure 2 and Figure 3The upper side of the positive connecting plate 2 is connected to a top baffle 4. The lower side of the top baffle 4 is in contact with the top surface of the side steel plate 1. The inner sides of the two top baffles 4 are respectively in contact with the left and right sides of the lower guide arch frame 7. The outer sides of the two positive connecting plates 2 are connected to side baffles 5. The two side baffles 5 are respectively attached to the left and right sides of the side steel plate 1. The upper side of the side baffles 5 is connected to the lower side of the top baffle 4.

[0030] In this embodiment, the top baffle 4 and the side baffle 5 are both made of steel plates with a thickness of 5mm as the main material and are welded together. When in use, the top baffle 4 is placed on the top surface of the side steel plate 1 and is closely attached to the I-beam flange of the lower guide arch frame 7. The side baffle 5 is attached to the side of the side steel plate 1. At this time, the mounting hole 21 on the connecting plate 2 is aligned with the bolt hole 11 on the side steel plate 1.

[0031] Example 3:

[0032] The basic content is the same as in Example 1, except that:

[0033] See Figure 3 The blocking component 3 includes a screw 31 and a connecting block 32. The screw 31 is threaded to the bolt hole 11 and the mounting hole 21. The connecting block 32 is connected to one end of the screw 31 and abuts against the outer side of the positive connecting plate 2. The size of the connecting block 32 is larger than the size of the screw 31. A sealing washer 33 is connected to the outer peripheral surface of the screw 31 near the connecting block 32. The connecting block 32 is rectangular.

[0034] In this embodiment, the screw 31 is made of round steel with a diameter of 22mm as the main material. The screw 31 and the connecting block 32 are connected by welding at the intersection. When in use, the connecting block 32 is rotated to make the screw 31 threadedly connected to the bolt hole 11. Rotate until the sealing washer 33 is in contact with the side steel plate 1. At this time, the connection and fixation of the screw 31 and the bolt hole 11 are completed.

[0035] Example 4:

[0036] The basic content is the same as in Example 1, except that:

[0037] See Figure 3 The screw 31 includes a threaded section 311 and a non-threaded section 312 connected in sequence. The threaded section 311 is threadedly connected to the bolt hole 11 and the mounting hole 21. The diameter of the non-threaded section 312 is smaller than the diameter of the threaded section 311.

[0038] In this embodiment, the non-threaded section 312 is first inserted into the bolt hole 11, and then inserted until the screw 31 can no longer be inserted. Then the connecting block 32 is rotated to connect the threaded section 311 with the bolt hole 11. After the shotcrete is finished, the connecting block 32 is rotated in the opposite direction until the screw 31 is loosened, and then the tool is taken out through the handle 6.

[0039] Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A tool for preventing blockage of bolt holes in the side steel plate of a tunnel guide arch frame, characterized in that: It includes two symmetrically arranged positive connecting plates (2), both of which are in contact with the side steel plate (1) on the lower guide arch frame (7). The positive connecting plates (2) are provided with mounting holes (21) that match the bolt holes (11) of the side steel plate (1). A blocking component (3) is installed in the mounting hole (21), and the blocking component (3) is connected to the bolt holes (11) of the side steel plate (1).

2. The anti-clogging tool for bolt holes on the side steel plate of the tunnel guide arch frame according to claim 1, characterized in that: The upper side of the positive connecting plate (2) is connected to a top baffle (4), the lower side of the top baffle (4) is in contact with the top surface of the side steel plate (1), the inner sides of the two top baffles (4) are in contact with the left and right sides of the lower guide arch frame (7) respectively, the outer sides of the two positive connecting plates (2) are connected to side baffles (5), the two side baffles (5) are in contact with the left and right sides of the side steel plate (1) respectively, and the upper side of the side baffles (5) is connected to the lower side of the top baffle (4).

3. The anti-clogging tool for bolt holes on the side steel plate of the tunnel guide arch frame according to claim 1, characterized in that: The blocking assembly (3) includes a screw (31) and a connecting block (32). The screw (31) is threaded to the bolt hole (11) and the mounting hole (21). The connecting block (32) is connected to one end of the screw (31) and abuts against the outside of the positive connecting plate (2). The size of the connecting block (32) is larger than the size of the screw (31).

4. The anti-clogging tool for bolt holes on the side steel plate of the tunnel guide arch frame according to claim 3, characterized in that: The screw (31) includes a threaded section (311) and a non-threaded section (312) connected in sequence. The threaded section (311) is threadedly connected to the bolt hole (11) and the mounting hole (21).

5. The anti-clogging tool for bolt holes on the side steel plate of the tunnel guide arch frame according to claim 4, characterized in that: The diameter of the non-threaded section (312) is smaller than the diameter of the threaded section (311).

6. The anti-clogging tool for bolt holes on the side steel plate of the tunnel guide arch frame according to claim 3, characterized in that: A sealing gasket (33) is connected to the outer peripheral surface of the screw (31) near the connecting block (32).

7. The anti-clogging tool for bolt holes on the side steel plate of the tunnel guide arch frame according to claim 3, characterized in that: The connecting block (32) is rectangular.

8. The anti-clogging tool for bolt holes on the side steel plate of the tunnel guide arch frame according to claim 1, characterized in that: A handle (6) is connected to one side of the positive connecting plate (2).

9. A tool for preventing blockage of bolt holes in the side steel plate of a tunnel guide arch frame according to claim 8, characterized in that: The handle (6) is U-shaped, and the two side walls of the handle (6) are connected to the positive connecting plate (2).

Images