Amin Keshavarz

Soil is one of the oldest and most complex engineering materials used by humans, with rapid growth of industry and population, there is a need for excavation and vertical wall in urban areas, road construction and coastal structures. Investigating the stability of the excavation is one of the important issues in civil engineering. Also, the presence of water inside the soil structure is known as a destructive factor in soil mechanics which increases the potential for failure and irreparable damage. Although, retaining walls are the highly used earth retention systems utilized for excavation, not enough attention has been paid to the effect of water seepage on the stability of these walls. In this study, the combination of differential quadrature method and stress characteristics method has been studied by considering the boundary conditions for evaluating the stability and numerical analysis of the rigid retaining walls. The flow field was computed by the differential quadrature method and the stress characteristics method has been used to solve the soil stress field. The results obtained were compared with other researchers in the dry state and with seepage. The research findings show an increase in the failure potential and a decrease in soil resistance with increasing water level in the upstream which, in the active mode, the lateral earth pressure coefficient is increased and in the passive mode, this coefficient is reduced. Plain strain mode is more conservative than axial symmetry.