Study on the Adaptability of Shield Tunnel Segments Orthogonal Crossing Grade III Loess Ground Fissure Section

Taking the Xi’an rail transit line orthogonal crossing ground fissure section as engineering background, structural properties and adaptability of shield tunnel lining segment under environment are carried out. Using finite element numerical simulation method, combined with relevant model tests that have been out by predecessors, damage characteristics structure action revealed. The results show is mainly shear deformation, local bending deformation. Secondly, principal tensile stress strain at arch waist foot ring intersecting largest. relative dislocation between rings near in hanging wall largest, opening top seam footwall Finally, conventional cannot be directly used site a vertical 200 mm.