顶管工程工作井的结构优化设计及稳定性分析OA

Taking the Panlong pipe-jacking project,which is a part of the Panlong-Zhongganling water diversion channel,as the engineering background,this paper presents a structural optimization design of the working shaft in pipe-jacking engineering based on a three-dimensional finite element model.Numerical analysis was employed to analyze the spatial mechanical characteristics and deformation patterns of the pipe-jacking working shaft structure and the surrounding soil mass,focusing on the mechanical behavior and deformation characteristics of the working shaft during excavation and lateral jacking.Based on orthogonal experimental design,the key parameters such as the thickness of the diaphragm wall and inner lining wall,base slab dimensions,and soil stiffness were systematical-ly examined to identify the interaction relationship among these parameters,and the optimal structural design of the working shaft was determined through quantitative comparison.Finite element modeling was employed to analyze the stability throughout the excavation and jacking stages,and the influence of the surrounding soil modulus on working shaft displacement was identified,providing a basis for reducing the displacement.