Deformation and reinforcement effects of soft soil deep foundation pits for shield tunnel launching

Abstract

Soft soil layers are characterized by high sensitivity, high compressibility, and low bearing capacity, making them prone to deformation and uneven settlement under external loads and vibrations. Based on the foundation pit project of the Mangzhou Tunnel in Zhuhai City, this study combines field monitoring and numerical simulation to analyze the horizontal displacement of diaphragm walls, surface settlement, and axial forces of lateral supports. The study aims to investigate the deformation development pattern of deep excavations in soft soil and the