Corrugated steel plate reinforced cross-fault tunnel and construction method

Abstract

This invention discloses a construction method for reinforcing tunnels across faults using corrugated steel plates. The method involves processing corrugated steel plates into a shape similar to tunnel lining and installing them inside the tunnel as a reinforcement. Its main features include the corrugated steel plate portion and the base support portion. Due to the waist-shaped holes on the corrugated steel plates and connectors, this invention significantly improves the tunnel's resistance to large fault deformations while ensuring good waterproofing and seepage prevention between the corrugated steel plates. The invention uses grouting bags to fill the gaps behind the corrugated steel plates, effectively controlling the grouting speed and area, greatly improving the grout retention rate in the grouting area behind the plates, preventing bulging of the corrugated steel plates at the joints due to excessive grout injection in a short time, and ensuring the grouting reinforcement effect. The support rods and beams allow the corrugated steel plates to be applied to more tunnel cross-sectional forms while meeting the tunnel's clearance requirements, solving the engineering problem of the inability to quickly repair tunnels after fault displacement.

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