A Construction Method for Improving the Seismic Ability of Tunnel

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...

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