Numerical Simulation Study on Ground Subsidence and Structural Stress Characteristics of Open Caisson Construction

Abstract

This paper studies the stress characteristics of caisson construction in complex strata and its influence on the surrounding environment, and focuses on the application effect of structural reinforcement technology of pipe jacking working well. Through the numerical simulation analysis of the Nanniwan power tunnel project in Wuhan, this paper analyzes the settlement deformation law of the surrounding environment during the sinking process of the caisson structure, and studies the stress characteristics of the caisson itself after the reinforcement measures. The results show that the construction of the reinforced structure can effectively reduce the settlement of the surrounding environment caused by the sinking of the caisson and improve the stability and safety of the structure. The contact pressure between the outer wall of the caisson and the soil increases sharply and then slowly during the sinking process, and the maximum value appears at the edge angle at the bottom of the caisson. The stress distribution on the section of the caisson is more uniform. As the depth increases, the stress decreases first and then increases. The research in this paper provides theoretical guidance and reference for disaster prevention and field construction of caisson construction in complex strata.