Analysis on Stability of Shield-driven in Different Grouting Reinforcement Range

Abstract:

Shield-driven is a key technology of shield-construction, but analysis on its stability is nearly a blank without calculation analysis methods, and the design mainly depends on the experience. Based on the design and construction of Tianpingjia Line 6# of Guangzhou metro, the paper made the analysis on the stability by means of finite difference procedure FLAC3D to simulate shield-driven, emphatically analyzed the stress field, destroyed field, and displacement field in different starting segment reinforcing ranges. The paper also discussed the reasonable thickness and strength. The research result is hopeful to provide theoretical basis and instruction for the design and construction of shield-driven.