Analysis of Stress and Deformation Law of Tunnel Crossing Sliding Body Based on Pasternak Two Parameter Foundation Assumption

Abstract

Because the landslide has an important influence on the internal force and deformation of the existing tunnel, and the research on the stress and deformation of the tunnel in the landslide area tends to field engineering monitoring, the corresponding theoretical analysis is relatively small, and there are some defects. First, Pasternak two parameter foundation model is introduced to establish the elastic foundation beam model of tunnel landslide interaction, which solves the soil discontinuity of Winkler foundation in the previous theory, and the transfer matrix method is used to derive the transfer matrix formula. Then, Matrix Laboratory (MATLAB) is used to compile the corresponding calculation program to analyze the distribution characteristics of internal force and deformation of the tunnel. Finally, the influence of relevant parameters such as the elastic coefficient of foundation inside and outside the landslide deformation area, the magnitude and distribution of landslide thrust, and the foundation shear stiffness inside and outside the landslide area are analyzed.