ELASTO-VISCOPLASTIC SOIL/WATER COUPLING FINITE ELEMENT ANALYSIS FOR MOUNTAIN TUNNEL IN UNCONSOLIDATED SAND LAYER

Abstract

Deformation prediction of the ground in tunnel excavation is important in order to examine the impoact on the neighboring structures. In this paper, an elasto-viscoplastic soil/water coupling finite element analysis is carried out for a mountain tunnel constructed in unconsolidated sand layers in Kanazawa. The applicability of this numerical method to the tunnel excavation analysis is examined by comparison between the analytical results and the measured ones. The effects of the analysis region and the mesh division on the results are also examined. It is shown that the analytical results match approximately the measured ones.