Ground fracture area tunnel lining structure based on shield tunnel and construction method of ground fracture area tunnel lining structure

Abstract

The invention relates to a ground fracture area tunnel lining structure based on a shield tunnel and a construction method of the ground fracture area tunnel lining structure. A circumferential special deformation joint is reserved in a secondary lining in the shield tunnel, the secondary lining at the special deformation joint protrudes towards the inner circumference to form an inwards-protruding-type expansion head structure, and the inwards-protruding-type expansion head structure is provided with a pre-embedded grouting pipe at an expansion head. According to the ground fracture area tunnel lining structure based on the shield tunnel and the construction method of the ground fracture area tunnel lining structure, direct crossing is conducted by adopting the shield tunnel at ground fractures, by constructing the secondary lining in the shield tunnel, the large deformation demand of a stratum is met, meanwhile, the engineering quality and safety of the surrounding environment are improved, continuity of a construction method for running tunnel and effective control over the engineering risk are achieved, and the precedent that crossing construction is conducted by adopting the shield tunnel at ground fracture areas is created at home and abroad.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to a tunnel lining structure in a ground fissure area based on a shield tunneling method and a construction method thereof. Background technique [0002] For the current rail transit projects in major cities in China, due to geological structures and human activities, there are different degrees of fault zones or broken areas in the strata, and they show certain instability and continuous deformation characteristics in the long-term process. In terms of extremely limited urban rail transit projects, it is a major controlling factor. [0003] Based on the characteristics of stratum activity and the technical characteristics of the shield tunneling method, when the tunnel project passes through the ground fissure area, it is generally considered as a mine tunnel. Under the premise of considering the maximum deformation of the ground within the design period, the tunnel head...

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Problems solved by technology

[0003] Based on the characteristics of stratum activity and the technical characteristics of the shield tunneling method, when the tunnel project passes through the ground fissure area, it is generally considered as a mine tunnel. Under the premise of considering the maximum deformation of the ground within the design period, the tunnel headroom is correspondingly enlarged, but due to the ground fissure area The geological conditions are poor, and the mining method tunnel is not conducive to engineering risk control and environmental protection, is not conducive to project investment control, and is not conducive to project quality control. As similar projects continue to appear all over the country, the disadvantages brought by conventional mining method tunnel solutions are becoming more and more serious. more obvious

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