Stress and deformation analysis of pipejacking thrust wall

The bearing capacity of the soil behind the thrust wall is analyzed with Rankine theory for lateral passive earth pressure in a pipe jaking project.The stress and deformation produced by the jacking force are researched by a three-dimension elastoplastic FEM model for the thrust wall and soil.The results are compared with the Rankine theory.The factors,the elastic modulus and the height of the thrust wall,the elastic modulus of soil and the wall-soil interface friction coefficient,which effect the deformation and the stress,are analyzed. The deformation of point for the composition of jacking forces is measured in situ and compared it with the result of FEM.The main reasons for the difference are discussed.