Lining design method of shield tunnel

Abstract

The invention provides a novel lining design method of shield tunnel, comprising: respectively establishing stress calculating models of shell unit, tube piece joint unit, and inter-ring joint unit, and considering the soil spring unit to form joint displacement unknown quantity number by the information of tube piece and load and to form structure rigidity matrix and structure load matrix by considering the shell unit and joint unit respectively, solving displacement and joint force of the shell unit by dividing the structure rigidity matrix, and checking whether the result satisfies the iteration condition, if not, returning to reestablish the structure rigidity matrix and structure load matrix, if so, carrying out relative structure design based on the calculation result.

Description

【Technical field】 [0001] The invention relates to the field of tunnel shields, in particular to the design of lining segments for shields. 【Background technique】 [0002] With the development of my country's economy and the improvement of comprehensive national strength, the climax of underground space development in large and medium-sized cities is coming, and the development of underground engineering is accelerating. As a mature construction technology, the shield method is more and more widely used, so A safe, economical and reasonable segment design method is particularly important. The biggest problem in the design theory of shield tunnel lining segment is whether the model itself can reflect the actual stress state of the segment. The design methods of tunnel lining segments at home and abroad include conventional method, modified conventional method, multi-hinge ring method and beam-spring model four methods. The beam-spring model can better reflect the stress state...

AI Technical Summary

Problems solved by technology

There are two main models for theoretical analysis and analysis of tunnel longitudinal structures: longitudinal beam-spring model and equivalent axial stiffness model. It is complicated, and the longitudinal simplification is difficult for the beam to accurately reflect the structural performance between the lining rings, so there will be some differences with the mechanical properties and structural performance of the tunnel, and it is easy to have large errors in the stiffness simplification and calculation parameter selection. The accuracy of the model has a greater impact, and it cannot simulate the stratification of the soil

The tunnel longitudinal structural performance and transverse structural performance are inseparable, which will inevitably cause certain changes in the transverse performance of the tunnel lining, but currently there is no model that can be applied to both the tunnel longitudinal and transverse structural performance analysis

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