Fault-crossing tunnel deformation coordination type supporting structure and construction method thereof

Abstract

The invention relates to a fault-crossing tunnel deformation coordination type supporting structure and a construction method thereof. The supporting structure is characterized in that an elastic deformation control body, a vertical limiting steel body and a discrete material filling body are arranged among a left side deformation coordination arch, a right side deformation coordination arch and a supporting arch; a drainage groove and a vertical limiting steel body limiting groove are respectively formed in the upper surfaces of the left side deformation coordination arch and the right side deformation coordination arch, and the connecting part is in a step shape and is provided with an elastic contact layer, a vertical closed body and a rear glue injecting hole; a rigid reinforced body is arranged at an arch foot of the supporting arch, an inclined reinforced body is arranged at an arch shoulder of the supporting arch, and an arch top reinforced layer and an elastic cushion layer are arranged at the outer side of an arch top of the supporting arch; a waterproof insulation layer is arranged along the outer side of the supporting structure. The invention not only can improve the resistance to fault part differential deformation of tunnel supporting structure, but also can improve the mechanical performance of the supporting structure. The invention also discloses the construction method of the fault-crossing tunnel deformation coordination type supporting structure.

Description

technical field [0001] The invention belongs to the field of underground engineering and tunnel engineering, and is suitable for the support engineering of oblique fault-spanning tunnels with high requirements on deformation control, in particular to a deformation-coordinated support structure for cross-fault tunnels that can effectively reduce the influence of faults on the tunnel support structure and construction methods. Background technique [0002] During the construction of mountain tunnel projects, it often happens that tunnels and underground works are located within the influence range of faults. Although the tunnel structure is generally considered to be an engineering building with superior seismic performance, however, the phenomenon of shear stress concentration at the fault position is obvious, coupled with the influence of factors such as mud, water and high ground stress in the fault, it is easy to cause catastrophic damage to the tunnel support structure ....

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Problems solved by technology

This construction method proposes a specific control method for the construction time of the support structure, but it does not involve the improvement of the tunnel support structure, and it is difficult to solve the problem of concentrated stress failure of the tunnel support structure when there is a large difference in deform

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