Inflatable seismic mitigation and absorption tunnel lining structure and construction method

Abstract

The invention discloses an inflatable seismic mitigation and absorption tunnel lining structure and a construction method, and belongs to the technical field of tunnel engineering earthquake proofing.The structure comprises combined glass fiber reinforced plastic lining segments, segment connectors, large-deformation waterstops, a displacement monitoring device and an intelligent hydraulic inflating device. Each combined glass fiber reinforced plastic lining segment consists of two arc-shaped glass fiber reinforced plastic plates at an inner layer and an outer layer, damping rods and inflatable air bags, wherein the arc-shaped glass fiber reinforced plastic plates at the inner layer and the outer layer are connected through the damping rods, and the inflatable air bags are clamped betweenthe two rows of damping rods in the circumferential direction to form the combined glass fiber reinforced plastic lining segment. The large-deformation waterstops are bonded to the inner sides and the outer sides of connecting seams of the outer layer arc-shaped glass fiber reinforced plastic plates. The displacement monitoring device consists of a laser displacement meter and a communication line for a computer. The intelligent hydraulic inflating device consists of a hydraulic air pump, an intelligent switch and an inflating air pipe. According to the inflatable seismic mitigation and absorption tunnel lining structure and the construction method, the inflatable seismic mitigation and absorption lining segments capable of being spliced are used for replacing a traditional concrete lining, the buffering and seismic absorbing performance of the air bags and the damping rods is utilized, the good dispersion effect on the seismic load is achieved, and the earthquake proofing grade of atunnel is improved.

Description

technical field [0001] The invention relates to the lining structure technology of an inflatable shock-absorbing and isolating tunnel, and belongs to the technical field of shock-absorbing tunnel engineering. Background technique [0002] With the continuous expansion of the scale of infrastructure construction and the continuous expansion of the distribution of the transportation network, a large number of tunnels are inevitably built in high-intensity earthquake areas. For a long time, there have been many researches on the anti-seismic absorption of above-ground structures, and many anti-seismic measures suitable for above-ground structures have been proposed. However, for underground structures such as tunnels, there have been less researches on anti-seismic isolation technology, but tunnels Once serious earthquake damage occurs to underground structures, it will not only cause damage to adjacent ground structures, but also be difficult and expensive to repair. How to r...

AI Technical Summary

Problems solved by technology

The shock-absorbing and isolating materials installed around the existing tunnels include volcanic slag, foam materials (such as polystyrene, foam resin, foam rubber, etc.) and lightweight concrete, etc., but these materials have disadvantages such as high cost and foam materials are easy to corrode and fail.

The use of a flexible structure can greatly reduce the stiffness of the tunnel structure and effectively reduce the acceleration response of the lining structure, but this method cannot meet the static requirements in the case of weak surrounding rocks, and it is difficult to popularize and apply

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