Analysis of Lateral Pressure on Supporting Structure for Foundation Pit

Calculating stability of supporting structures, earth pressure and water pressure are usually considered. Nonconsideration of groundwater seepage is one of the main reasons why measured values of waterearth pressure on supporting structures are generally very different from those calculated values. Mechanical effects of groundwater seepage on earth pressure were studied and the viscous drag force and seepage force were considered together. By setting up differential coefficient equations and constructing a set of entire new calculation expressions on the foundation pit were presented with consideration of groundwater seepage. It was proved that the hindrance force and the water pressure around the earth are in equilibrium with the water weight. The results calculated with the new expressionswere very close to the measured waterearth pressure values. Applying this method for calculating foundation pit,the results are approach to practice values.