A Construction Method for Improving the Seismic Ability of Tunnel

A construction method and tunnel technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve the problems of little improvement in the seismic performance of lining structures, mismatch between surrounding rock and structural stiffness, high construction safety risks, etc., and achieve the goal of extending tunnels The effect of structural life, release of surrounding rock pressure and deformation energy, and improvement of seismic performance

Active Publication Date: 2022-05-17
CENT SOUTH UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, when constructing in active fault zones or high-intensity earthquake areas, the defects of the support forms used in the prior art mainly include that the seismic performance of the lining structure is not greatly improved, and the influence of fault displacement displacement on the internal force of the structure cannot be well resolved. , the tunnel expansion section increases the sudden change of the structural shape, the stiffness of the surrounding rock and the structure does not match, the structure is prone to damage or collapse when a strong earthquake occurs, and there is a high construction safety risk

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A construction method for improving the seismic capacity of a tunnel, comprising the following construction steps:

[0028] (1) Surrounding rock survey before construction to determine the surrounding rock area to be strengthened within the tunnel construction scope;

[0029] (2) Grouting is performed on the surrounding rock area that needs to be strengthened, and the surface of the surrounding rock that has vibration cracks or may appear vibration cracks is repaired with anti-seismic damping materials;

[0030] (3) Carry out initial support structure construction on the surrounding rock surface above the inverted arch structure of the tunnel, and set a plurality of circumferential seismic joints along the depth direction of the tunnel on the initial support structure;

[0031] (4) Carry out the construction of the inverted arch structure of the tunnel;

[0032] (5) a plurality of anti-seismic devices are arranged on the primary support structure that completes the con...

Embodiment 2

[0042] A construction method for improving the seismic capacity of a tunnel, comprising the following construction steps:

[0043] (1) Surrounding rock survey before construction to determine the surrounding rock area to be strengthened within the tunnel construction scope;

[0044] (2) Grouting is performed on the surrounding rock area that needs to be strengthened, and the surface of the surrounding rock that has vibration cracks or may appear vibration cracks is repaired with anti-seismic damping materials;

[0045] (3) Carry out initial support structure construction on the surrounding rock surface above the inverted arch structure of the tunnel, and set a plurality of circumferential seismic joints along the depth direction of the tunnel on the initial support structure;

[0046] (4) Carry out the construction of the inverted arch structure of the tunnel;

[0047] (5) a plurality of anti-seismic devices are arranged on the primary support structure that completes the con...

Embodiment 3

[0069] A construction method for improving the seismic capacity of a tunnel, comprising the following construction steps:

[0070] (1) Surrounding rock survey before construction to determine the surrounding rock area to be strengthened within the tunnel construction scope;

[0071] (2) Grouting is performed on the surrounding rock area that needs to be strengthened, and the surface of the surrounding rock that has vibration cracks or may appear vibration cracks is repaired with anti-seismic damping materials;

[0072] (3) Carry out initial support structure construction on the surrounding rock surface above the inverted arch structure of the tunnel, and set a plurality of circumferential seismic joints along the depth direction of the tunnel on the initial support structure;

[0073] (4) Carry out the construction of the inverted arch structure of the tunnel;

[0074] (5) a plurality of anti-seismic devices are arranged on the primary support structure that completes the con...

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Abstract

The invention relates to a construction method for improving the seismic capacity of a tunnel, which comprises the following construction steps: (1) determining the surrounding rock area to be strengthened within the tunnel construction range; (2) grouting reinforcement to the surrounding rock area to be strengthened, and The rock surface is repaired with anti-seismic damping materials; (3) construction of the initial support structure; (4) construction of the inverted arch structure of the tunnel; (5) multiple anti-seismic devices are installed on the completed initial support structure; (6 ) to carry out the construction of the secondary support structure, there is a gap between the secondary support structure and the primary support structure along the radial direction of the tunnel, and the secondary support structure is composed of steel truss supports and composite structural plates; (7) in the above The anti-seismic material is injected into the gap to fill the entire gap. The construction method of the invention adopts a combination of various anti-seismic measures to achieve a good anti-seismic effect, fundamentally solves the problem of tunnel support, and improves the anti-seismic capacity of the tunnel.

Description

technical field [0001] The invention relates to the technical field of anti-seismic construction of tunnel engineering, in particular to a construction method for improving the anti-seismic capability of tunnels. Background technique [0002] In recent years, with the increase in the number of underground structures and the frequent occurrence of strong earthquakes around the world, the anti-seismic issue of underground structures has been paid more and more attention by countries all over the world. In some large tunnel projects, it is inevitable to pass through active fault zones or high-intensity earthquake zones. When a tunnel passes through an active fault zone or a high-intensity earthquake zone, the earthquake will cause the tunnel to undergo more severe shearing, causing large-scale damage to the tunnel that is difficult to repair, causing great casualties and losses, and making traffic difficult. Restoring in time also can't carry out anti-earthquake disaster relief...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/10C04B28/04
CPCE21D11/10C04B28/04C04B22/14C04B14/06C04B18/22C04B22/149C04B22/147C04B24/00C04B24/24
Inventor 袁立刚赵圣武李小利李新于艺林徐显攀李桐卢艳斌张艳鹏王启乾
Owner CENT SOUTH UNIV
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