A tunnel axial shock-absorbing energy-absorbing device and a tunnel lining structure with the device

Abstract

The invention relates to a tunnel axial shock absorption and energy absorption device and a tunnel lining structure having the device. The tunnel axial shock absorption and energy absorption device comprises: a lining for connecting an energy absorption body and a lining divided into adjacent ones along the tunnel axial direction Two connecting pieces of the main structure; wherein, the energy absorbing body is set to be rigid along the tunnel radial direction, and can generate relative displacement along the tunnel axial direction for absorbing axial energy. The tunnel axial shock absorption and energy absorption device provided by the invention does not impair the overall ability of the tunnel lining to bear static load due to the rigidity of the tunnel in the radial direction; the tunnel has certain flexibility in the axial direction, which can improve the axial tension and compression of the tunnel The seismic capacity of deformation, and can absorb the phase-derived stress and relative displacement generated by the earthquake, and has a good anti-shock effect, thus ensuring the safety of the tunnel lining structure during the earthquake; and the device is easy to install and easy to replace.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to an axial vibration-absorbing energy-absorbing device for a tunnel and a tunnel lining structure provided with the device. Background technique [0002] Compared with surface structures such as bridges or high-rise buildings, the relative movement between the tunnel structure and the surrounding rock during an earthquake is not obvious for mountain tunnels. As a result, previous engineering circles did not pay much attention to their seismic behavior and seismic design. However, this traditional view has been proved to be one-sided by several major earthquakes in recent decades, such as the Great Hanshin Earthquake in Japan in 1995, the Chiji Earthquake in Taiwan in 1999, the Wenchuan Earthquake in Sichuan in 2008, and the Kumamoto Earthquake in 2016. In recent years, the anti-seismic method of tunnels is generally adopted in the anti-seismic design of...

AI Technical Summary

Problems solved by technology

In recent years, the anti-seismic method of tunnels is generally adopted in the anti-seismic design of tunnels, but this method cannot well prevent the occurrence of axial earthquake damage in tunnels; the expansion joint design adopted in the axial design of tunnels is to prevent the Expansion, cold contraction), to cause cracks or damage to the structure and set a structural joint along the appropriate part of the lining construction joint direction, and the above-mentioned tunnel expansion joints can only enable the tunnel to withstand sliding in the axial direction, for energy such as seismic waves The absorption does not play any role, that is, the expansion joint cannot absorb energy and cannot play a good shock absorption effect

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