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Special construction auxiliary device for tunnel double-side-wall pilot tunnel method

A technology of double side wall guide pit and auxiliary device, applied in tunnels, mining devices, tunnel lining and other directions, can solve problems such as threatening the life safety of workers, collapse of tunnel side walls, poor support effect, etc., to improve the support effect, avoid The effect of stress concentration and structural stability

Pending Publication Date: 2022-08-02
CHONGQING VOCATIONAL INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The support structure is simple, which greatly reduces the number of temporary supports. Although it can also support the side wall of the tunnel, due to the reduction in the number of supports, the support effect may be poor, resulting in the collapse of the tunnel side wall, which may threaten staff safety

Method used

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  • Special construction auxiliary device for tunnel double-side-wall pilot tunnel method
  • Special construction auxiliary device for tunnel double-side-wall pilot tunnel method
  • Special construction auxiliary device for tunnel double-side-wall pilot tunnel method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 is basically as attached figure 1 shown:

[0029] A special construction auxiliary device for tunnel 1 double side wall guide pit method, including upper support and lower support, and the upper support includes left side wall guide pit support 2, middle partition wall support 7 and right side wall guide pit support 3, the lower support includes the left lower step support and the right lower step support: the upper support and the lower support both include steel arches, the steel arches are provided with advanced conduits and steel mesh, and between the steel arches are provided with steel arches. Radial grouting pipe;

[0030] The shape of the left side wall guide pit support 2 and the right side wall guide pit support 3 is a triangle with an arc, and the left side wall guide pit support 2 and the right side wall guide pit support 3 include the first side 4 , the second side 5 and the third side 6; the first side 4 is in contact with the side wall of the ...

Embodiment 2

[0041] The difference between this embodiment 2 and the embodiment 1 is that, as shown in the appendix Figure 2-4 Shown: also includes a plug 15 and a heating device; the first side 4 and the second side 5 are connected in a detachable manner, the first side 4 is in a convex shape, and the second side 5 is provided with a The convex part of the strip edge 4 is matched with the groove. The first side 4 and the second side 5 are provided with through holes into which the plug 15 can be inserted. The plug 15 is L-shaped. The plug 15 includes a vertical side and a horizontal side connected by end faces. The horizontal side is located in the through hole. One side 4 and the second side 5 are fixed together, the vertical side is in contact with the heating device, the other end of the heating device is in contact with the wall of the tunnel 1, the heating device includes the first layer and the second layer, the first layer and the second layer Through the film connection, the fil...

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Abstract

The invention belongs to the technical field of tunnel construction, and particularly relates to a special construction auxiliary device for a tunnel double-side-wall heading method. A special construction auxiliary device for a tunnel double-side-wall pilot tunnel method comprises an upper support, a lower support and a middle support, the lower support comprises a left lower step support and a right lower step support, and the left side wall pilot tunnel support and the right side wall pilot tunnel support are triangles with arcs. Each of the left side wall pilot tunnel support and the right side wall pilot tunnel support comprises a first edge, a second edge and a third edge; the first edge is in contact with the side wall of the tunnel, the second edge is parallel to the ground, and the third edge is respectively connected with the first edge and the second edge; according to the scheme, through the circular rings tangent to the three edges in the left side wall pilot tunnel support or the right side wall pilot tunnel support, the structure of the left side wall pilot tunnel support or the right side wall pilot tunnel support is more stable, the three edges bear force in the middle besides the two ends, stress concentration is avoided, and the supporting effect is effectively improved.

Description

technical field [0001] The solution belongs to the technical field of tunnel construction, and specifically relates to a special construction auxiliary device for a tunnel double-side wall guide pit method. Background technique [0002] The double side wall pilot pit method is a method of tunnel excavation, also known as the double side wall pilot hole method or the glasses construction method. When using the double-side wall guide pit method for tunnel excavation, the excavation face subdivision used is generally to divide the tunnel excavation section into four pieces, namely the left side wall guide pit (also known as the left side wall guide hole), Right side wall pilot pit (also known as right side wall pilot hole), upper core soil area pilot pit (also known as upper core soil area pilot hole) and lower bench excavation pilot pit (also known as lower bench excavation pilot hole) ). Field measurements show that the surface subsidence caused by the double-side-wall pilo...

Claims

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Application Information

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IPC IPC(8): E21D11/18E21D11/15E21D11/14E21D11/10E21F17/18
CPCE21D11/18E21D11/152E21D11/14E21D11/10E21F17/18Y02E10/20
Inventor 李晋旭蒋博林赵媛静李红立
Owner CHONGQING VOCATIONAL INST OF ENG
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