Round TBM tunnel lining safety assessment method

Abstract

The invention discloses a circular TBM tunnel lining safety assessment method, and belongs to the technical field of tunnel construction, and the method comprises the following steps: obtaining design data and geotechnical data of a TBM tunnel; calculating to obtain a coefficient matrix of the load matrix; the detection displacement of the TBM tunnel lining is obtained through calculation, and a corresponding matrix is constructed; calculating to obtain a surrounding rock load matrix; calculating to obtain an analytic displacement matrix at any position of the TBM tunnel lining; calculating to obtain a correlation coefficient between the TBM tunnel lining detection displacement and the analysis displacement; the reliability is judged through the correlation coefficient, and the internal force of any position of the TBM tunnel lining is obtained through tunnel lining displacement deformation analysis when the reliability is achieved; defining the ratio of the tunnel lining stress to the yield strength of the TBM; according to the ratio of the TBM tunnel lining stress to the yield strength, safety evaluation is conducted, and a safety evaluation result is obtained. The problem that it is difficult to accurately evaluate the safety of the integral cast-in-place TBM tunnel lining is solved.

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