关键词: 盾构施工, 线路沉降变形, 花岗岩残积土 ,

Abstract: Shielded tunneling method is used in the construction of subways in many cities in China, which is applied to the construction of composite strata. The granite residual soil has the characteristics of low strength, high permeability and medium to low compressibility. In many areas, many problems have been encountered in the process of shield construction in granite residual soil stratum. To analyze the causes of surface subsidence and the pattern of surface subsidence, firstly, the Peck formula is used to predict and analyze the settlement between Gaoxinyuan Station and Shenda Station in the continuation project of Shenzhen Metro Line No. 1. Secondly, the on-site deformation monitoring data are analyzed, and the settlement of the left and right lines of the line is analyzed as a whole. Then, the causes of surface settlement are further analyzed and summarized. The analysis concluded that the depth of the tunnel, the buildings above the line, and the soil quality in the construction area all influence the settlement conditions of the line.

Key words: Shielded Tunneling, Alignment Settlement Deformation, Granite Residual Soil