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Method for building tunnel shock-absorbing structure in earthquake region

A construction method and technology in earthquake areas, applied in tunnels, tunnel linings, underground chambers, etc., can solve the problems of unfavorable earthquake resistance of tunnels, achieve good shock absorption effect, good elasticity, and easy implementation

Inactive Publication Date: 2008-07-23
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the tunnel lining has the dynamic characteristics of following the deformation of the ground, and increasing the rigidity will increase the internal force of the tunnel, which is not conducive to the earthquake resistance of the tunnel

Method used

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  • Method for building tunnel shock-absorbing structure in earthquake region

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Embodiment

[0021] Fig. 1 shows, a kind of specific embodiment of the present invention is: a kind of construction method of the shock-absorbing structure of tunnel in earthquake zone, and its way is: in the surrounding rock of tunnel opening section and primary support 1 surface, first lay a layer of elastic material The shock-absorbing layer 2 formed, the longitudinal length of the shock-absorbing layer 2 (i.e. the length extending from the opening to the tunnel depth) is 15-50 meters, and then the secondary lining 3 is built outside the shock-absorbing layer.

[0022] The shock-absorbing layer 2 has an inverted U-shaped cross section. The elastic material constituting the shock-absorbing layer 2 is rubber, and its thickness is 8-15 centimeters.

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Abstract

The invention relates to a construction method for a tunnel damping structure in earthquake areas, which is characterized in that a damping layer (2) is laid on the surrounding rock of the tunnel portal section and the surface of an early support (1), which comprises an elastic material; the longitudinal length of the damping layer (2) is 15-50 meters; then a secondary lining (3) is constructed outside the damping layer. The construction method for a tunnel damping structure in earthquake areas has the advantages of good damping effect, simple construction and low cost, thus effectively avoiding the damage caused by earthquakes to the tunnel.

Description

technical field [0001] The invention relates to a construction method of a tunnel shock-absorbing structure in an earthquake zone. Background technique [0002] Tunnels are generally considered to be engineering buildings with relatively superior seismic performance, and generally do not need anti-seismic design. But this is not the case. In recent years, there have been reports in many countries that tunnels in earthquake areas have suffered serious damage due to earthquakes, especially for long tunnels on some major lines. The loss far exceeds the repair cost of the tunnel itself. Among the damages suffered by the tunnel due to the earthquake, the entrance section is particularly serious. Once the entrance section is damaged, it is very difficult to repair, and it becomes the key part of the tunnel's anti-seismic absorption. [0003] The main method for alleviating earthquake disasters in tunnels in the prior art is to increase the thickness of the secondary lining of th...

Claims

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Application Information

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IPC IPC(8): E21D11/00
Inventor 王志杰何川高波关宝树晏启祥李永伸刘春山张洋
Owner SOUTHWEST JIAOTONG UNIV
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