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A tunnel energy-dissipating support structure and construction method

A technology for supporting structures and tunnels, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve the problems of long time, high maintenance cost, time-consuming and laborious, etc., to reduce the possibility of maintenance, save maintenance costs, Guarantee the effect of stability and security

Active Publication Date: 2021-11-05
SUN YAT SEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is time-consuming, laborious, and costly to maintain, and it cannot completely solve the problem of large deformation, because it takes a long time for large deformation to occur. Sometimes, large deformation occurs after the second lining is completed, and even large deformation occurs after operation. Once the large deformation occurs after operation, the operation needs to be interrupted to deal with it, which will have a great impact

Method used

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  • A tunnel energy-dissipating support structure and construction method
  • A tunnel energy-dissipating support structure and construction method
  • A tunnel energy-dissipating support structure and construction method

Examples

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Effect test

Embodiment approach

[0025] In this example, if figure 2 , Figure 5 As shown, the circumferential energy release device 2 includes a ball joint 23, a hollow ball seat 21 connected to one of the two circumferentially adjacent radial energy absorbing devices 1, and an elastic pad 22 arranged inside the hollow ball seat 21, The hollow ball seat 21 is provided with an avoidance hole 211 towards the area of ​​the other of the two adjacent radial energy-absorbing devices 1 , and the ball hinge 23 includes a rod part 232 and a ball part 231 connected to one end of the rod part 232 The ball portion 231 is wrapped in the elastic pad 22 , and the end of the rod portion 232 away from the ball portion 231 protrudes through the escape hole 211 and is connected to the other of the two circumferentially adjacent radial energy-absorbing devices 1 . When the surrounding rock is deformed, the two rings move relative to the adjacent radial energy-absorbing device 1, and drive the ball part 231 of the ball joint 2...

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Abstract

The invention discloses a tunnel energy-dissipating support structure and a construction method. A plurality of radial energy-absorbing devices distributed at intervals in the circumferential direction are arranged between the primary lining and the second lining of the tunnel, and the two linings are connected by a circular energy-releasing device. The two rings are connected to adjacent radial energy-absorbing devices to form an annular support structure, and the annular energy-releasing device provides resistance to the relative movement of the radial energy-absorbing device to absorb part of the energy generated by the large deformation of the surrounding rock; and each The outer support plate and the inner support plate of each radial energy absorbing device are connected by an inertial device, and the radially shrinkable inertial device provides resistance to the radial contraction of the radial energy absorbing device to further absorb the surrounding rock Energy from large deformations. Therefore, the present invention can absorb the energy generated by the large deformation of the cross-fault tunnel while allowing relatively large deformation of the surrounding rock, thereby effectively ensuring the stability and safety of the cross-fault or broken zone tunnel.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering construction, in particular to a tunnel energy-dissipating support structure and a construction method. Background technique [0002] The existing tunnel support structure generally includes the primary lining and the secondary lining. The primary lining is the primary support formed after the excavation of the tunnel by bolting, hanging nets, shotcrete and other means. The primary support mainly uses the surrounding rock The strength forms the support; the second lining uses reinforced concrete to form a complete reinforced concrete structure inside the primary lining. [0003] When the tunnel passes through a fault or broken zone, because the surrounding rock at the fault or broken zone itself is very broken and has low strength, it is prone to large deformation. Generally, it is necessary to strengthen the rock and soil mass by pre-grouting and other methods before excavation. Long ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/00
CPCE21D11/003
Inventor 段俊峰马建军黄林冲梁基冠陈万祥梁禹党文刚赖正首陈海南
Owner SUN YAT SEN UNIV
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