An auxiliary device for tunnel temporary support dismantling

Abstract

The utility model relates to an auxiliary device for tunnel temporary support dismantling, including permanent support steel frame and temporary support steel frame, be provided with first flange plate on permanent support steel frame, be provided with second flange plate on temporary support steel frame, first flange plate is connected with second flange plate with threaded fastener, the protection cover of rectangular box shape one side opening is clamped on first flange plate and second flange plate, and threaded fastener is covered in protection cover. Advantageous effects are: the threaded fastener is covered with the protection cover, prevents concrete from spraying on the threaded fastener, removes the protection cover when dismantling, and the threaded fastener is directly dismantled, avoids breaking the concrete on the threaded fastener and causes first flange plate and permanent support steel frame deformation.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, and in particular to an auxiliary device for the dismantling of temporary supports in tunnels. Background Technology

[0002] Due to the large tunnel cross-section and poor surrounding rock conditions, the use of temporary support steel frames is unavoidable during tunnel construction. The conventional design involves connecting the temporary and permanent support steel frames via flanges using matching bolts and nuts, and then sealing them with shotcrete. However, when dismantling the temporary supports later, the shotcrete needs to be removed. Because there are no protective measures for the flanges, bolts, and nuts, removing the concrete can easily damage the permanent steel frame and deform the connecting flanges, making it difficult to dismantle the temporary support steel frames. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned problems in the existing technology and provide an auxiliary device for the dismantling of temporary supports in tunnels.

[0004] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:

[0005] An auxiliary device for dismantling temporary supports in a tunnel includes a permanent support steel frame and a temporary support steel frame. A first flange plate is provided on the permanent support steel frame, and a second flange plate is provided on the temporary support steel frame. The first flange plate and the second flange plate are connected by threaded fasteners. A rectangular box-shaped protective cover with an opening on one side is clamped on the first flange plate and the second flange plate, and the threaded fasteners are covered in the protective cover.

[0006] The protective cover has a bayonet on each of its left and right sides, and the first flange plate, the second flange plate, and the wing plate of the permanent support steel frame are locked in the bayonet.

[0007] The opening end of the protective cover abuts against the waist plate of the permanent support steel frame and the waist plate of the temporary support steel frame.

[0008] The outer edge of the opening end of the protective cover is provided with a bevel.

[0009] The protective cover has a U-shaped lifting lug fixed to its closed end.

[0010] The protective cover has an L-shaped baffle fixed to its left and right sides respectively, and the baffle abuts against the outer side of the first flange plate and the outer side of the second flange plate.

[0011] The beneficial effects of this utility model are: the protective cover covers the threaded fasteners to prevent concrete from spraying onto them; the protective cover can be removed during disassembly to facilitate direct disassembly of the threaded fasteners, thus avoiding deformation of the first flange plate and permanent support steel frame when breaking the concrete on the threaded fasteners. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0013] Figure 1 This is a structural schematic diagram of the auxiliary device in its assembled state according to Embodiment 1 of this utility model;

[0014] Figure 2 This is a structural schematic diagram of the auxiliary device in the disassembled state in Embodiment 1 of this utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the protective cover in Embodiment 1 of this utility model;

[0016] Figure 4 This is a structural schematic diagram of the auxiliary device in the assembled state in Embodiment 2 of this utility model;

[0017] Figure 5 This is a structural schematic diagram of the auxiliary device in the disassembled state in Embodiment 2 of this utility model;

[0018] Figure 6 This is a schematic diagram of the structure of the protective cover in Embodiment 2 of this utility model;

[0019] The following are the labels in the diagram: permanent support steel frame 100, first flange plate 101, wing plate 102, temporary support steel frame 200, second flange plate 201, threaded fastener 300, protective cover 1, bayonet 2, bevel 3, U-shaped lifting lug 4, baffle 5. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] like Figures 1 to 3 The first embodiment shown describes an auxiliary device for dismantling temporary supports in a tunnel, comprising a permanent support steel frame 100 and a temporary support steel frame 200. The permanent support steel frame 100 is provided with a first flange plate 101, and the temporary support steel frame 200 is provided with a second flange plate 201. The first flange plate 101 and the second flange plate 201 are connected by threaded fasteners 300. A rectangular box-shaped protective cover 1 with an opening on one side is fitted onto the first flange plate 101 and the second flange plate 201, and the threaded fasteners 300 are covered in the protective cover 1.

[0022] A bayonet 2 is provided on the left and right sides of the protective cover 1, and the first flange plate 101, the second flange plate 201 and the wing plate 102 of the permanent support steel frame 100 are locked in the bayonet 2.

[0023] The opening end of the protective cover 1 abuts against the waist plate of the permanent support steel frame 100 and the waist plate of the temporary support steel frame 200, reducing the amount of concrete entering the protective cover 1.

[0024] The outer edge of the opening of the protective cover 1 is provided with a bevel 3, which makes it convenient to insert a tool from the bevel 3 into the gap between the protective cover 1 and the permanent support steel frame 100 or the gap between the protective cover 1 and the temporary support steel frame 200 during dismantling, so as to pry the protective cover 1 loose and facilitate its dismantling.

[0025] like Figures 4 to 6 The second embodiment shown describes an auxiliary device for dismantling temporary supports in a tunnel, comprising a permanent support steel frame 100 and a temporary support steel frame 200. The permanent support steel frame 100 is provided with a first flange plate 101, and the temporary support steel frame 200 is provided with a second flange plate 201. The first flange plate 101 and the second flange plate 201 are connected by threaded fasteners 300. A rectangular box-shaped protective cover 1 with an opening on one side is fitted onto the first flange plate 101 and the second flange plate 201, and the threaded fasteners 300 are covered in the protective cover 1.

[0026] A bayonet 2 is provided on the left and right sides of the protective cover 1, and the first flange plate 101, the second flange plate 201 and the wing plate 102 of the permanent support steel frame 100 are locked in the bayonet 2.

[0027] The opening end of the protective cover 1 abuts against the waist plate of the permanent support steel frame 100 and the waist plate of the temporary support steel frame 200, reducing the amount of concrete entering the protective cover 1.

[0028] The outer edge of the opening of the protective cover 1 is provided with a bevel 3, which makes it convenient to insert a tool from the bevel 3 into the gap between the protective cover 1 and the permanent support steel frame 100 or the gap between the protective cover 1 and the temporary support steel frame 200 during dismantling, so as to pry the protective cover 1 loose and facilitate its dismantling.

[0029] The closed end of the protective cover 1 is fixed with a U-shaped lifting lug 4. When removing it, use a tool to hook the U-shaped lifting lug and pull it outward to make it easy to remove the protective cover 1 from the first flange plate 101 and the second flange plate 201.

[0030] An L-shaped baffle 5 is fixed to the left and right sides of the protective cover 1. The baffle 5 abuts against the outer side of the first flange plate 101 and the outer side of the second flange plate 201. The baffle 5 blocks the gap between the sides of the first flange plate 101 and the second flange plate 201, reducing the amount of concrete entering the gap between the sides of the first flange plate 101 and the second flange plate 201.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An auxiliary device for dismantling temporary supports in tunnels, comprising a permanent support steel frame and a temporary support steel frame, characterized in that: The permanent support steel frame is provided with a first flange plate, and the temporary support steel frame is provided with a second flange plate. The first flange plate and the second flange plate are connected by threaded fasteners. The first flange plate and the second flange plate are fitted with a rectangular box-shaped protective cover with one side opening, and the threaded fasteners are covered in the protective cover.

2. The auxiliary device according to claim 1, characterized in that: The protective cover has a bayonet on each of its left and right sides, and the first flange plate, the second flange plate, and the wing plate of the permanent support steel frame are locked in the bayonet.

3. The auxiliary device according to claim 1, characterized in that: The opening end of the protective cover abuts against the waist plate of the permanent support steel frame and the waist plate of the temporary support steel frame.

4. The auxiliary device according to claim 1, characterized in that: The outer edge of the opening of the protective cover is beveled.

5. The auxiliary device according to claim 1, characterized in that: The closed end of the protective cover is fixed with a U-shaped lifting lug.

6. The auxiliary device according to claim 1, characterized in that: An L-shaped baffle is fixed to each of the left and right sides of the protective cover. The baffle abuts against the outer side of the first flange plate and the outer side of the second flange plate.

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