Structure for reinforcing tunnel by utilizing arch rings and method for reinforcing tunnel

A technology for tunnels and arch rings, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc. It can solve the problems of limited tunnel effects, high cost, and large steel consumption, and achieve good reinforcement effects, strong resistance to deformation, and high bearing capacity. high effect

Inactive Publication Date: 2014-05-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, steel plate rings are often used to support and strengthen tunnels, but the effect of strengthening tunnels is limited, and the amount of steel used is large and the cost is high

Method used

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  • Structure for reinforcing tunnel by utilizing arch rings and method for reinforcing tunnel
  • Structure for reinforcing tunnel by utilizing arch rings and method for reinforcing tunnel
  • Structure for reinforcing tunnel by utilizing arch rings and method for reinforcing tunnel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] like Figure 1 to Figure 4 As shown, there is a ballast bed 2 in the tunnel 1. In this embodiment, the radial deformation of the tunnel 1 has occurred, and its maximum value is 20 mm. Utilize arch rings to reinforce the structure of the tunnel, including corbels 3, 500 arch rings and connectors 6 fixed on both sides of the ballast bed 2 of the tunnel 1, and the two ends of the bottom of the arch rings are respectively fixed on the corresponding and corresponding to the arch rings. The corbels 3 on both sides of the ballast bed 2, 500 said arch rings are distributed along the longitudinal direction of the tunnel 1, and at the same time, the two adjacent arch rings are connected by a connecting piece 6;

[0035] The arch ring includes 7 sections of arc-shaped steel pipes 4, the inner cavity of which is filled with concrete, and the cross-section of the arc-shaped steel pipes 4 is square; Tight arch ring. The section size of the arc-shaped steel pipe 4 is 100mm×100mm, wh...

Embodiment 2

[0051] This structure utilizing the arch ring to strengthen the tunnel is the same as embodiment 1 except for the following technical features: in this embodiment, tunnel 1 has undergone radial deformation, and its maximum value is 20mm. Arch rings reinforce it. The arch ring includes 7 sections of arc-shaped steel pipes 4, the inner cavity of the arc-shaped steel pipes 4 is filled with concrete, and the cross-section of the arc-shaped steel pipes 4 is square; The surface of the arch ring 4 is close to the surface, the section size of the arc-shaped steel pipe is 100mm×100mm, and the wall thickness of each side of the arc-shaped steel pipe is 2.5mm.

[0052] Using the finite element software ABAQUS to analyze, if no reinforcement measures are taken for the tunnel, the maximum radial deformation will reach 40 mm, while the maximum radial deformation of the tunnel after the arch ring reinforcement of this embodiment is 30 mm, the maximum radial deformation The deformation reduc...

Embodiment 3

[0054] This structure utilizing the arch ring to strengthen the tunnel is the same as embodiment 1 except for the following technical features: in this embodiment, tunnel 1 has undergone radial deformation, and its maximum value is 20mm. It is reinforced by an arch ring, and the arch ring includes 7 sections of arc-shaped steel pipes 4, the inner cavity of the arc-shaped steel pipes 4 is filled with concrete, and the section of the arc-shaped steel pipes 4 is rectangular; the arc-shaped steel pipes 4 are sequentially Connect to form an arch ring 4 close to the inner wall surface of the tunnel 1, the size of the section of the arc-shaped steel pipe is 80mm×150mm, wherein the section size of the steel pipe along the radial direction of the tunnel 1 is 80mm, and the section size of the steel pipe along the longitudinal direction of the tunnel 1 is 150mm, The wall thickness of each side of the curved steel pipe is 5mm. This embodiment is applicable to the case where there is littl...

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Abstract

The invention discloses a structure for reinforcing a tunnel by utilizing arch rings. The structure comprises corbels fixed on two sides of a track bed of the tunnel, at least two arch rings and connecting pieces, wherein two ends of the bottom of each arch ring are fixed on the corbels correspondingly located on two sides of the track bed respectively, and two adjacent arch rings are connected through the connecting pieces. Each arch ring mainly comprises multiple sections of arc-shaped steel tubes which are filled with concrete, and the thickness of the tube wall of each side of each arc-shaped steel tube is determined according to the stress condition. At the same time, the invention discloses a method for reinforcing the tunnel. Compared with a steel plate ring structure, the structure for reinforcing the tunnel by utilizing the arch rings has the characteristics of high bearing capacity, high deformation resistance and the like, so that the bearing capacity and the deformation resistance of the tunnel are improved, and phenomena of tunnel water seepage and the like are reduced; and meanwhile, the steel use amount is small, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of tunnel reinforcement, in particular to a tunnel reinforcement structure and a tunnel reinforcement method using an arch ring. Background technique [0002] As my country's requirements for traffic operations are increasing, rail transit is becoming more and more important. Its annual passenger turnover accounts for more than 1 / 3 of the entire society's passenger turnover, and its completed cargo turnover accounts for 1 / 3 of the entire society's cargo turnover. More than 55% of the traffic, in the city, the subway is the most effective means of transportation to relieve the urban traffic pressure. [0003] Tunnels are important passages for rail transportation. During the use of tunnels, problems such as overloading, unloading, corrosion, settlement, and floating will inevitably occur. When it is too large, it will also lead to insufficient bearing capacity of the tunnel and cause large deformation, result...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/18
Inventor 吴波罗跃春
Owner SOUTH CHINA UNIV OF TECH
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