Fiber concrete secondary lining tunnel earthquake resisting and absorbing construction method

A fiber reinforced concrete and secondary lining technology, applied in tunnels, shaft linings, tunnel linings, etc., to achieve the effect of improving impact resistance, small thickness and variable thickness

Inactive Publication Date: 2014-01-22
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, my country's underground structure-related seismic codes have not yet proposed effective anti-seismic materials and measures, and it is very urgent and necessary to study the seismic issues of tunnels and underground engineering.

Method used

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  • Fiber concrete secondary lining tunnel earthquake resisting and absorbing construction method
  • Fiber concrete secondary lining tunnel earthquake resisting and absorbing construction method
  • Fiber concrete secondary lining tunnel earthquake resisting and absorbing construction method

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Embodiment Construction

[0033] The implementation of the present invention will be further described below in conjunction with the accompanying drawings. However, it should be emphasized that the following embodiments are only exemplary and not intended to limit the scope and application of the present invention.

[0034] refer to figure 1 , the anti-shock-absorbing structure 3 of the fiber concrete secondary lining tunnel of the present invention (that is, the fiber concrete secondary lining), the setting range is 50m from the tunnel door 1 along the longitudinal direction of the tunnel. The tunnel door 1 can be an end wall type door, a wing wall type door, a step type door or a column type door etc. according to the actual situation of the terrain. The tunnel primary support 2 is usually shotcrete layer or reinforced concrete layer. The fiber concrete secondary lining 3 is constructed after the deformation of the surrounding rock and primary support 2 is basically stable. To prevent longitudinal...

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Abstract

The invention discloses a fiber concrete secondary lining tunnel earthquake resisting and absorbing construction method. Fiber concrete is adopted in a secondary lining of a tunnel portal section to form a tunnel portal section earthquake resisting and absorbing structure. The fiber concrete secondary lining is arranged in the range of 50m in the lengthwise direction of a tunnel from a tunnel portal door, and the secondary lining is made of the fiber concrete. According to the tunnel constructed through the method, the earthquake resistance of the lining, the fatigue resistance of the lining, the crack resistance of the lining and the durability of the lining can be effectively improved, crack development can be well controlled and the effect of cracking without damage is achieved; the ductility of the lining can be improved, the brittleness can be lowered, the earthquake response delay time is long, stress redistribution and earthquake energy absorption can be effectively facilitated, main earthquake loads can be resisted and damage to the structure by earthquake power can be weakened; the thickness of the lining becomes smaller, the flexibility is improved, meanwhile the excavated volume can be reduced, and the tunnel repairing efficiency can be effectively improved.

Description

technical field [0001] The invention relates to a tunnel construction method, in particular to a tunnel anti-seismic construction method involving fiber concrete secondary lining. Background technique [0002] A tunnel is an underground structure buried in the ground. When an earthquake occurs, the underground structure will move with the surrounding rock. It is generally believed that the vibration acceleration of the surrounding rock is less than the acceleration of the ground structure, and the surrounding rock has sufficient rigidity and strength to keep the shape of the tunnel unchanged, so the tunnel is considered to have good shock-absorbing performance. However, the 1995 Hanshin Earthquake in Japan caused serious damage to more than 10% of the Ridge Tunnels in the disaster area, and the 1999 Taiwan Jiji 7.6 magnitude earthquake caused serious damage to about 25% of the tunnels within 25km of the seismogenic fault. Recognizing that earthquakes have an important impac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/14E21D11/00
Inventor 周佳媚蒙国往严启王英学胡瑶瑶冯天炜常效境
Owner SOUTHWEST JIAOTONG UNIV
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