Adsorption type foot protection device for tunnel primary support steel arch

Abstract

The utility model discloses an adsorption type foot protection device for a tunnel primary support steel arch, which is used for protecting a connecting plate at an arch foot of the primary support steel arch, and is characterized by comprising a bottom plate, the side plate is vertically connected to one side of the bottom plate; the cover plates are respectively connected to two side positions between the bottom plate and the side plates; and a gap is formed between the cover plate and the bottom plate. The foot protection device has the advantages that the foot protection device can be firmly connected to the arch foot of the steel arch and can be firmly clamped to the connecting plate through the gap, and the connecting plate and bolt holes in the connecting plate are effectively prevented from being wrapped or covered by concrete. When the steel arch needs to be used, only the foot protection device needs to be removed. The device is simple in structure, convenient to operate, high in protection efficiency and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, and particularly relates to an adsorption type foot protection device for the primary support steel arch in a tunnel. Background Art

[0002] During tunnel construction, when the bench cut method is used for excavation, the primary support construction of the middle and lower benches generally lags behind the upper bench for a certain period of time. Therefore, before installing the steel arch in the middle and lower benches, the shotcrete construction of the upper bench needs to be completed first. In this way, it is very easy for the connection plates of the steel arches between the upper bench and the middle bench or the lower bench to be wrapped or covered by the shotcrete of the upper bench. When workers install the steel arches in the middle and lower benches, they need to spend time and energy cleaning the concrete adhered to the connection plates and bolt holes at the arch feet, which affects the construction efficiency and quality. Content of the Utility Model

[0003] The purpose of the utility model is to provide an adsorption type foot protection device for the primary support steel arch in a tunnel according to the deficiencies of the above-mentioned prior art, which can effectively prevent the connection plates of the steel arches in the middle and lower benches from being wrapped or covered by concrete.

[0004] The purpose of the utility model is achieved by the following technical solutions:

[0005] An adsorption type foot protection device for the primary support steel arch in a tunnel, which is used to protect the connection plate at the arch foot of the primary support steel arch. Among them, it includes:

[0006] A bottom plate;

[0007] Side plates, vertically connected to one side of the bottom plate;

[0008] A pair of cover plates, respectively connected to both sides between the bottom plate and the side plates; among them

[0009] There is a gap between the cover plate and the bottom plate.

[0010] Optionally, the cover plate is of a hollow structure.

[0011] Optionally, the distance between the two cover plates is equal to or greater than the maximum outer diameter of the arch foot.

[0012] Optionally, the height of the gap between the cover plate and the bottom plate is equal to or greater than the thickness of the connection plate.

[0013] Optionally, after the foot protection device is installed, it covers part of the connection plate and completely covers the bolt holes on the connection plate.

[0014] Optionally, a circular groove for installing a magnet is provided at the bottom of the bottom plate. After the magnet is installed, the foot protection device is firmly adsorbed on the connection plate.

[0015] Optionally, a handle for pulling the foot protection device is installed on one side of the side plate facing away from the bottom plate.

[0016] Optionally, the number of the foot protection devices is two, and they are installed in pairs at a pair of the arch feet of the primary support steel arch frame.

[0017] Optionally, the bottom plate and the side plate are of a split structure or an integral structure.

[0018] Optionally, the handle is in a C shape, and the number of the handles is two, which are symmetrically installed on the side plate.

[0019] The advantages of the present utility model are as follows:

[0020] The foot protection device of the present utility model can be firmly connected to the arch feet of the steel arch frame, and can be firmly clamped on the connecting plate through the gap, effectively preventing the connecting plate and the bolt holes on the connecting plate from being wrapped or covered by concrete. When the steel arch frame needs to be used, only the foot protection device needs to be removed. The present utility model has a simple structure, convenient operation, high protection efficiency and strong practicability. Description of the Drawings

[0021] Figure 1 is a schematic installation diagram of the foot protection device of the present utility model and the steel arch frame;

[0022] Figure 2 is a schematic separation diagram of the foot protection device of the present utility model and the steel arch frame;

[0023] Figure 3 is a schematic structural diagram of the foot protection device of the present utility model;

[0024] Figure 4 is a schematic back structure diagram of the foot protection device of the present utility model;

[0025] Figure 5 is a schematic diagram of the bottom of the foot protection device of the present utility model and the steel arch frame. Detailed Embodiment

[0026] Each mark in the figure is respectively: 1, bottom plate; 2, side plate; 3, cover plate; 4, circular groove; 5, gap; 6, handle; 100, foot protection device; 200, steel arch frame; 201, connecting plate; 202, bolt hole; 300, arch foot.

[0027] Embodiment: Please refer to Figure 1 , Figure 2 and Figure 3As shown, an adsorption type foot protection device 100 for the initial support steel arch in an embodiment is shown, which is used to protect the connecting plate 201 at the arch foot of the initial support steel arch 200. Among them, it includes a bottom plate 1; a side plate 2 vertically connected to one side of the bottom plate 1; a pair of cover plates 3 respectively connected to both sides between the bottom plate 1 and the side plate 2; and there is a gap 5 between the cover plate 3 and the bottom plate 1.

[0028] Optionally, the cover plate 3 is of a hollow structure, the distance between the two cover plates 3 is equal to or greater than the maximum outer diameter of the arch foot 300, and the height of the gap 5 between the cover plate 3 and the bottom plate 1 is equal to or greater than the thickness of the connecting plate 201.

[0029] Optionally, after the foot protection device 100 is installed, it covers a part of the connecting plate 201 and completely covers the bolt holes 202 on the connecting plate 201.

[0030] Optionally, a circular groove 4 for installing a magnet is provided at the bottom of the bottom plate 1. After the magnet is installed, the foot protection device 100 is firmly adsorbed on the connecting plate 201.

[0031] Optionally, a handle 6 for pulling out the foot protection device 100 is installed on the side of the side plate 2 facing away from the bottom plate 1.

[0032] Optionally, the number of the foot protection devices 100 is two, and they are installed in pairs at a pair of arch feet 300 of the initial support steel arch 200, and the bottom plate 1 and the side plate 2 are of a split structure or an integral structure.

[0033] Optionally, the handle 6 is in a C shape and the number is two, which are symmetrically installed on the side plate 2.

[0034] The characteristics and functions of the present utility model are further understood through the following description.

[0035] The foot protection device 100 in this embodiment is mainly to protect the connecting plate 201 at the arch foot 300 of the steel arch 200 to ensure that the connecting plate 201 and the bolt holes 202 in the connecting plate 201 are not wrapped or covered by concrete. Because when it needs to be used later, it is necessary to remove the concrete at the connecting plate 201 additionally, which wastes time and it is very inconvenient to remove the solidified concrete.

[0036] During tunnel construction, the wing plates first install the steel arch of the upper bench, then gradually install the steel arch of the middle bench, and finally install the steel arch of the lower bench. However, after the steel arch of the upper bench is installed, when spraying concrete, it is very easy to spray onto the steel arches at the middle and lower benches, so that the connecting plates at the arch feet of the steel arches at the middle and lower benches are wrapped or covered, and at the same time, the bolt holes of the connecting plates are covered.

[0037] Therefore, a foot protection device is disclosed in this embodiment, which effectively protects the connecting plate at the arch foot of the steel arch frame in the middle and lower steps and the bolt holes in the connecting plate. The foot protection device mainly includes a bottom plate 1, a side plate 2 vertically connected to one side of the bottom plate 1, and two cover plates 3 symmetrically connected to both sides between the bottom plate 1 and the side plate 2. There is a gap 5 between the cover plate 3 and the bottom plate 1, and the height of the gap 5 is equal to or slightly less than the thickness of the connecting plate 201, so that the foot protection device 100 can be firmly clamped on the connecting plate 201. Further, a circular groove 4 is opened at the bottom of the bottom plate 1, and a magnet can be installed in the circular groove 4. Therefore, after the magnet is installed, the foot protection device 100 can be more firmly adsorbed on the connecting plate 201. After the magnet is removed, the foot protection device 100 can be pulled out from the connecting plate 201 through the handle 6.

[0038] In summary, the foot protection device of the present utility model can be firmly connected to the arch foot of the steel arch frame, and can be firmly clamped on the connecting plate through the gap, effectively preventing the connecting plate and the bolt holes on the connecting plate from being wrapped or covered by concrete. When the steel arch frame needs to be used, only the foot protection device needs to be removed. The structure of the present utility model is simple, the operation is convenient, the protection efficiency is high, and the practicability is strong.

[0039] The above are only the preferred embodiments of the present utility model, and do not limit the implementation manners and protection scope of the present utility model. For those skilled in the art, it should be able to realize that all the equivalent replacements and obvious changes made by using the description and illustrations of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A tunnel primary support steel arch frame adsorption foot protection device, used to protect the connection plate at the arch foot of the primary support steel arch frame, characterized in that: include: Base plate; A side plate, vertically connected to one side of the bottom plate; A pair of cover plates, respectively connected to two sides between the bottom plate and the side plates; in There is a gap between the cover plate and the bottom plate.

2. The tunnel primary support steel arch frame adsorption type foot protection device according to claim 1 is characterized in that: The cover plate is a hollow structure.

3. The tunnel primary support steel arch frame adsorption type foot protection device according to claim 2 is characterized in that: The distance between the two cover plates is equal to or greater than the maximum outer diameter of the arch foot.

4. The tunnel primary support steel arch frame adsorption type foot protection device according to claim 3 is characterized in that: The height of the gap between the cover plate and the bottom plate is equal to or greater than the thickness of the connecting plate.

5. The tunnel primary support steel arch frame adsorption type foot protection device according to claim 4 is characterized in that: After being installed, the foot protection device covers a portion of the connecting plate and fully covers the bolt holes on the connecting plate.

6. The tunnel primary support steel arch frame adsorption type foot protection device according to claim 5 is characterized in that: A circular groove for installing a magnet is provided at the bottom of the base plate. When the magnet is installed, the foot protection device is firmly adsorbed on the connecting plate.

7. The tunnel primary support steel arch frame adsorption type foot protection device according to claim 1 is characterized in that: A handle for pulling out the foot protection device is installed on the side of the side plate facing away from the bottom plate.

8. The tunnel primary support steel arch frame adsorption type foot protection device according to claim 1 is characterized in that: The number of the foot protection devices is two, and they are installed in pairs at a pair of arch feet of the primary supporting steel arch frame.

9. The tunnel primary support steel arch frame adsorption type foot protection device according to claim 1 is characterized in that: The bottom plate and the side plate are of separate structures or integrated structures.

10. The tunnel primary support steel arch frame adsorption type foot protection device according to claim 7, characterized in that: The handles are C-shaped, and there are two of them, which are symmetrically installed on the side panels.

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