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Tunnel entrance supporting device and tunnel entrance construction method

A technology of support device and construction method, applied in tunnels, tunnel lining, shaft equipment and other directions, can solve the problems of increasing accident rate, more manpower, material resources and occupation, and achieve the effect of avoiding landslides and reducing accident rate.

Pending Publication Date: 2018-11-23
GUANGXI COMM PLANNING SURVEYING & DESIGNING INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a support device for a tunnel entrance and a construction method for a tunnel entrance, so as to solve the problem that the existing technology easily leads to a large amount of earth and rock excavation in the mountain, which costs more manpower and material resources and occupies more construction period and land acquisition area. , and the technical problems of easily damaging the mountain structure and increasing the accident rate during construction

Method used

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  • Tunnel entrance supporting device and tunnel entrance construction method
  • Tunnel entrance supporting device and tunnel entrance construction method
  • Tunnel entrance supporting device and tunnel entrance construction method

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Such as Figure 1-3 As shown, the tunnel opening support device provided in this embodiment includes an arch structure 1 and a retaining wall structure 2 . The arch structure 1 is fixed on one side of the mountain slope, the retaining wall structure 2 is fixed on the side of the arch structure 1 close to the bottom slope of the mountain slope, and the retaining wall structure 2 is used to support the arch structure 1 .

[0051] Wherein, the arch structure 1 includes a plurality of support frames 10, and each support frame 10 is arched, and the first ends of the plurality of support frames 10 are all fixed on the retaining wall structure 2, and the second ends of the plurality of support frames 10 are are fixed on the ground. The minimum angle between the line between the first end and the second end of the support frame 10 and the tunnel axis 4 is θ, θ is less than or equal to 90 degrees and greater than 0 degrees, and the angle between the support frame 10 and the tun...

Embodiment 2

[0092] Such as Figure 5 As shown, the tunnel entrance construction method provided in this embodiment applies the tunnel entrance support device provided in Embodiment 1, including:

[0093] Foundation construction: Excavate the mountain body on one side of the mountain slope, and make the foundation 11 of the arch structure and the foundation 20 of the retaining wall structure at the excavation;

[0094] The construction of the arch structure 1 and the retaining wall structure 2: fix the first end of the support frame 10 on the foundation 20 of the retaining wall structure, and fix the second end of the support frame 10 on the foundation 11 of the arch structure;

[0095] A retaining wall structure 2 is constructed on the foundation 20 of the retaining wall structure, and an arch structure 1 is constructed at the supporting frame 10 .

[0096] In the construction of the tunnel entrance, the mountain body can be excavated on one side of the mountain slope, and the mountain b...

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Abstract

The invention provides a tunnel entrance supporting device and a tunnel entrance construction method, and belongs to the field of tunnel construction. The tunnel entrance supporting device comprises acover arch structure and a retaining wall structure; the retaining wall structure is fixed at one side, which is close to a bottom slope of a mountain slope, of the cover arch structure. The cover arch structure comprises a plurality of supporting frames; the supporting frames are all of an arc shape; first ends of the supporting frames are all fixed on the retaining wall structure; second ends of the supporting frames are all fixed on the ground. A minimum included angle between a connection line between the first end and the second end of each supporting frame and a tunnel axis is theta; theta is smaller than or equal to 90 degrees and greater than 0 degree; theta between each supporting frame and the tunnel axis is gradually reduced from 90 degrees from an open cut tunnel entrance facade to a dark tunnel entrance facade in the tunnel construction. The tunnel entrance construction method applies the tunnel entrance supporting device and comprises base construction and construction of the cover arch structure and the retaining wall structure. The tunnel entrance supporting device and a tunnel entrance construction method solve the problems of large earthwork amount of mountain excavation, large acquired land area and great possibility of damaging a mountain structure, which are easy to cause in the prior art.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a tunnel opening support device and a tunnel opening construction method. Background technique [0002] In the construction of shallow-buried bias-pressure tunnels, when using the underground excavation method, a casing arch is often used at the tunnel entrance on the side of the mountain. The casing arch is used to form an open hole in the construction of the tunnel entrance. It is the junction of the open hole and the dark hole in the tunnel construction. After the arches are poured into shape, the tube shed will be constructed. The arch is used to support the pipe shed, and the pipe shed is used to bear the pressure caused by the subsidence of the soil or rock mass above the shallow buried bias tunnel. [0003] The existing set of arches comprises a plurality of arched section steels, and the plurality of arched section steels are arranged in parallel. Before se...

Claims

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Application Information

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IPC IPC(8): E21D9/00E21D9/14E21D11/10E21D11/18
CPCE21D9/001E21D9/14E21D11/10E21D11/18
Inventor 李洋溢林增海熊劲松宾海峰虞杨袁通吴秋军骆俊晖
Owner GUANGXI COMM PLANNING SURVEYING & DESIGNING INST