Abstract: The difficult problem of landslides in doublearch tunnel construction under silty clay stratum is presented in this paper. The Suzhou International Rapid Logistics Corridor project is evaluated as a case history.  Based on numerical simulation, the excavation process of the “three-guideway method” for the construction of a double-arch tunnel in a silty clay stratum is simulated by considering factors such as tunnel topography, geological conditions, and construction stages. To minimize construction collapse, the tunnel design adopts the double-link arch composite lining structure to reduce the influence of complex strata on the lining. Among them, pipe curtains, pipe shed and overtopping anchor are used as overtopping support. Ground anchors, reinforcing mesh, shotcrete and steel arch are used as initial support. Finally, pouring reinforced concrete lining as secondary lining. The soil displacement and stress distribution around the tunnel were analyzed, and the feasibility and safety of the method were verified. The results of the study can provide reference for the construction of similar projects.

Key words: Silty Clay, Asymmetric Double-Arch Tunnel, Numerical Simulation, Soil Displacement