A Passive Vectoring Flexible Joint Structure for Segmental Lining of Cross-fault Tunnel

Abstract

The present invention relates to the field of tunnel engineering, and provides a segmental lining passive vector type flexible joint structure for cross-fault tunnels, including a joint bridging mechanism, a bridging plate seam buckle plate, a bridging plate seam rubber, a waterproof plate protection layer, and a drag reducing layer and a foam concrete shock-absorbing filling layer; wherein, there are multiple joint bridging mechanisms, and multiple joint bridging mechanisms are arranged circumferentially along the fault-crossing tunnel, and adjacent joint bridging mechanisms pass through the bridging plate seam The pinch plate is connected with the seam rubber of the bridging plate; at the same time, the waterproof plate protection layer and the drag reducing layer are also arranged between the outside of the joint bridging mechanism and the waterproof plate on the inner side of the initial support of the tunnel, and the joint bridging mechanism The foam concrete shock-absorbing filling layer is arranged in the joint with the secondary lining of the tunnel. The invention has the advantages of not only good waterproof and deformation ability, but also meeting the load bearing requirements of the surrounding rock near the lining joints.

Description

technical field [0001] The invention relates to the field of tunnel engineering, in particular to a passive vector flexible joint structure lining a cross-fault tunnel segment. Background technique [0002] In recent years, as my country's transportation infrastructure has entered a stage of comprehensive development, more and more traffic tunnels pass through fault-crossing areas, such as the Shigangba Water Diversion Tunnel, the Duwen Highway Jijiaya Tunnel, the Duwen Expressway Longdongzi Tunnel, and the Zipingpu Tunnel. Tunnels, etc., are located in high-intensity seismic areas and pass through fault fracture zones. Due to the obvious sudden change of surrounding rock stiffness in cross-fault tunnels, damages such as tunnel shear dislocation caused by strong earthquakes and fault dislocations are also frequent phenomena. According to relevant literature statistics, the maximum vertical dislocation of the tunnel structure through the fault zone can reach 4.0m after the di...

AI Technical Summary

Problems solved by technology

At present, the location of lining joints often has problems such as unreliable waterproof measures and insufficient deformation capacity.

However, increasing the joint width to enhance the deformation capacity of the flexible joint significantly reduces the bearing reliability near the lining joint.

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