Tunnel energy dissipation supporting structure and construction method

Abstract

The invention discloses a tunnel energy dissipation supporting structure and a construction method. The method includes the steps that a plurality of radial energy absorption devices distributed at intervals in the annular direction are arranged between a primary lining and a secondary lining of a tunnel, every two adjacent radial energy absorption devices in the annular direction are connected through an annular energy release device to jointly form an annular supporting structure, and the annular energy release device provides resistance for relative movement of the radial energy absorption device so as to absorb part of energy generated by large deformation of surrounding rock; and an outer supporting plate and an inner supporting plate of each radial energy absorption device are connected through an inerter device, and the inerter devices capable of contracting in the radial direction provide resistance for radial contraction of the radial energy absorption devices so as to further absorb energy generated by large deformation of the surrounding rock. Therefore, the can absorb the energy generated by large deformation of a cross-fault tunnel, meanwhile, the surrounding rock is allowed to generate relatively large deformation, and the stability and safety of a cross-fault or a fracture zone tunnel can be effectively guaranteed.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering construction, in particular to a tunnel energy-dissipating support structure and a construction method. Background technique [0002] The existing tunnel support structure generally includes the primary lining and the secondary lining. The primary lining is the primary support formed after the excavation of the tunnel by bolting, hanging nets, shotcrete and other means. The primary support mainly uses the surrounding rock The strength forms the support; the second lining uses reinforced concrete to form a complete reinforced concrete structure inside the primary lining. [0003] When the tunnel passes through a fault or broken zone, because the surrounding rock at the fault or broken zone itself is very broken and has low strength, it is prone to large deformation. Generally, it is necessary to strengthen the rock and soil mass by pre-grouting and other methods before excavation. Long ...

AI Technical Summary

Problems solved by technology

This method is time-consuming, laborious, and costly to maintain, and it cannot completely solve the problem of large deformation, because it takes a long time for large deformation to occur. Sometimes, large deformation occurs after the second lining is completed, and even large deformation occurs after operation. Once the large deformation occurs after operation, the operation needs to be interrupted to deal with it, which will have a great impact

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