Shield tunnel longitudinal seam joint field angle inversion analysis method

Abstract

The invention provides a shield tunnel longitudinal seam joint field angle inversion analysis method, which adopts a successive rotation method, regards a duct piece body structure as a rigid body, rotates each duct piece around a joint neutral axis, and decomposes the overall deformation of a tunnel structure into the rotational deformation of each joint. And finally, the corner of each joint and the opening and compression deformation of the inner side and the outer side are obtained. On the basis of a successive rotation method, input parameters comprise joint neutral axis positions and convergence deformation values of the tunnel structure in a certain direction, output results are rotation angles of all joints, and the inversion process is achieved through an MATLAB programming method. Through an inversion analysis method, the deformation value of each joint of the tunnel structure in the service period under the existing deformation condition is obtained, the understanding and understanding of people on the deformation of the longitudinal joint joints of the tunnel in the operation period are greatly enhanced, and meanwhile, a new method is provided for evaluating the service state of the tunnel in the operation period.

Description

technical field [0001] The invention relates to an inverse analysis method for the opening angle of a longitudinal seam joint of a shield tunnel, in particular to an inversion analysis method for the opening angle of a longitudinal seam joint of a shield tunnel. Background technique [0002] With the development of my country's infrastructure construction, a number of subways have been built in major cities across the country, among which the assembled shield tunnel structure has been widely used in the subway. However, in the subway tunnel structures that have been in service, various diseases have been observed, such as joint opening, water leakage, bolt exposure and concrete collapse, etc. The opening of the longitudinal joints of shield tunnels is a common defect during the operation period of shield tunnels, and the mechanical properties of the joints of the longitudinal joints are very important to the overall service state of the tunnel structure. However, as the tunn...

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Problems solved by technology

The opening of the longitudinal joints of shield tunnels is a common defect during the operation period of shield tunnels, and the mechanical properties of the joints of the longitudinal joints are very important to the overall service state of the tunnel structure. However, as the tunnel structure is a concealed engineering structure, the deformation of the joint outside the It is known that the opening of the inner joint can only be measured during the operation period, so for engineers, it is impossible to obtain the detailed deformation of the inner and outer joints of the tunnel, and it is impossible to evaluate the service state of the tunnel structure

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