Influence Analysis of Ground Asymmetric Load to Existing Open Trench Tunnel Based on Soil Arching Effect

摘要

The soil layers around the tunnel were equal to cohesionless homogenate mass by introducing the concept of equivalent internal frictionangle in this paper. Based on the Terzarghi unconsolidated mass theory, the soil arching effect of existing open trench tunnels under ground asymmetric load is discussed. Furthermore, the critical embedded depth formula of soil arching effect is given. Finally, it is concluded that both the size and distribution of the ground asymmetric load have influence on soil arching effect of existing open trench tunnel.