Abstract
Time dependent earth pressure on support system in excavations is investigated through the soil-water coupled finite deformation analysis employing the subloading Cam-clay model. In this study, two type of ground conditions (1) a ground which can self support the excavation, (2) a ground which can not self support, are considered. Due to pore water migration within the soil, lateral pressure initially increases with time finally reaching a constant value. In ground (1) the support system is exerted by higher lateral pressure when the support is introduced just after the excavation.
The pressure on supports reduces significantly when the installation is delayed. However, in ground (2) there is no much deference in pressure even with delayed support installation.
