Large-section special deformation joint building method based on earthquake fracture zone

Abstract

The invention particularly provides a large-section special deformation joint building method based on an earthquake fracture zone. A tunnel structure is enlarged according to design requirements, a 550 mm later-period damage reinforcing space is reserved, the thickness of a second lining is improved according to the enveloping performance, the thickness of the improved second lining is 600 m, thewidth of the special deformation joint in a ground fracture affection area is designed to be 150 mm, fault movement is achieved, and the damage degree generated by fault movement is reduced. An end formwork is designed before construction, the end formwork, a special-shaped formwork and a special-shaped formwork supporting system are machined in advance to be subjected to trial splicing, end formworks, special-shaped formworks and arch frame formworks are allowed to be produced in a batched manner when errors are in the allowed range, the deformation joint construction period is shortened, the construction speed is increased, the construction period is shortened, construction materials are saved, and the construction environment is safer.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a construction method based on large-section special deformation joints in earthquake fault zones. Background technique [0002] Northwest my country is deeply inland, with complex topographical conditions, stratum lithology, and widely developed fault structures. As my country's infrastructure becomes more and more extensive, especially the subway construction is booming, more and more tunnels will inevitably cross active faults. Seismic fault zone activity is the main cause of serious damage to underground engineering. Earthquake action and active faults The cumulative shear faults caused by continuous creep will seriously damage the tunnel lining safety and axis stability. [0003] Through the accumulation and summary of long-term experience in tunnel design and construction at home and abroad, a relatively mature and perfect design scheme has been formed for the...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for constructing special deformation joints based on large sections of earthquake fault zones, which can realize continuous cycle operation, fast turnover construction, speed up construction, shorten construction period, and form a special deformation joint waterproof structure. The traditional deformation joint waterproofing technology cannot meet the waterproof requirements of the large displacement of special deformation joints in the fault zone, but can meet the waterproof function requirements of the special deformation joints in the fault zone when they are continuously displaced within the water level of the installation.

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