3-DIMENSIONAL FEM ANALYSIS CONSIDERING EXCAVATING PROCESS FOR SUPER NEIGHBORING CONSTRUCTION OF SLURRY SHIELD TUNNELS

Abstract

In neighboring construction by shield tunneling method, it is necessary to grasp the ground deformation and the effect to the existing structures within the execution. In this paper, the method of 3-Dimensional FEM analysis considering the excavating process was suggested first.In this analysis, shield machine, segments and back-filling material are modeled and tunnel face pressure and backfill grouting pressure are considered as load conditions. Secondly, by way of the shield tunnels by super neighboring constriction, the FEM analysis was carried out and compared with the result of the measurements.