Method for preventing continuous collapse of shield tunnel and structural failures of tunnel lining

Abstract

The invention relates to a method for preventing continuous collapse of a shield tunnel and structural failures of a tunnel lining. A guide rail is longitudinally laid on the inner wall of the tunnellining, and an inflatable airbag device is adopted to prevent the continuous collapse of the shield tunnel and the structural failures of the tunnel lining; the inflatable airbag device comprises an airbag, an airbag box for accommodating the airbag in a folded state, an inflation device and a control system. In the excavation construction process of the tunnel, a displacement sensor measures thedistance between the tunnel and an excavation surface, when the distance is longer than a preinput standard distance, the airbag box moves forward, and the standard distance is kept; when a sudden situation happens in the construction process of the tunnel and the measured distance is shorter than the standard distance, whether or not a falling object exists is judged, the inflation device is controlled to be started, and whether or not the inflation device can stop inflation is controlled according to an air pressure measurement signal of an air pressure sensor at an air injection port of theairbag box.

Description

Technical field [0001] The invention belongs to the field of tunnel engineering and relates to a method for preventing continuous collapse of a shield tunnel and failure of the tunnel lining structure. Background technique [0002] In recent years, in order to solve the problem of urban traffic congestion, the construction of urban underground transportation lines in my country has been increasing. Different from the construction of above-ground traffic engineering, the tunnel construction period is long and the engineering geological conditions are complicated. Due to the release of ground stress during the excavation process, sudden geological problems are prone to occur. Most tunnel collapse accidents occur during the construction phase of the tunnel. [0003] The characteristics of tunnel collapse accidents are sudden and high degree of damage, which will not only delay the construction period, increase the project cost, but even cause casualties. [0004] Traditional tunnel col...

AI Technical Summary

Problems solved by technology

[0005] At present, in the field of tunnel construction engineering, for the problem of continuous collapse in the process of tunnel excavation, the existing technology has slow response speed, long processing time, low safety and large economic losses to deal with sudden tunnel collapse.

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