Semi-rigid semi-flexible anti-impact tunnel surrounding rock supporting structure under seismic zone and construction method thereof

Abstract

The invention discloses a semi-rigid semi-flexible anti-impact tunnel surrounding rock supporting structure under a seismic zone and a construction method thereof. The semi-rigid semi-flexible anti-impact tunnel surrounding rock supporting structure is composed of a surrounding rock body, a porous metal wallboard, a rigid support, a pull rod, an anchorage device, a pedestal, a porous metal base plate, a porous metal sleeve, a baffle and a drill bit, wherein the porous metal wallboard is arranged outside the surrounding rock body, the rigid support is arranged outside the porous metal wallboard, the pull rod is sleeved with the porous metal sleeve, the porous metal base plate and the pedestal are mounted on the pull rod, the anchorage device is arranged outside the pedestal, the anchorage device is mounted at the end of the pull rod, and the baffle and the drill bit are mounted at the bottom of the pull rod. A porous metal material is added on a rigid supporting structure, thus the safety of the rigid support can be ensured, the safety of the surrounding body is improved, and the impact effect of an impact load on the supporting structure is reduced; the porous metal material can adsorb concrete, the cohesiveness of a whole anchor rod and a wall body is improved, after the supporting structure is impacted, the porous metal material has high rigidity after being compressed, safeconstruction of a tunnel can be guaranteed, and the stability in the tunnel construction process is improved.

Description

technical field [0001] The invention relates to a surrounding rock support structure, in particular to a semi-rigid and semi-flexible impact-resistant tunnel surrounding rock support structure in an earthquake zone and a construction method thereof. Background technique [0002] The basic function of the tunnel support system is to maintain the long-term stability of the surrounding rock. Tunnel engineering activities cause deformation and damage of the surrounding rock and stress redistribution. Due to the restraint of the surrounding rock itself, as the stress is released, most of the surrounding rock load is transferred to adjacent For strata, when the surrounding rock conditions are good, the accumulation degree of engineering response is low, there is no threat to construction safety, and essentially no support is required; however, when the surrounding rock cannot achieve self-balancing, external intervention is required, that is, timely Construct support structures to...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that due to the vibration of the external load, the support structure is likely to break or even collapse, resulting

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