渗流引起的水压力及对水泥土挡土墙的影响

通过计算水泥土挡土墙周围的渗流场，研究了墙侧水压力的变化规律.结果表明水压力系数沿高程并非常数，且受到墙侧土层分布及其相对透水性、墙基土的透水性和下卧不透水层埋深等因素的严重影响.总体来说，考虑渗流时墙后的侧压力总小于不考虑渗流时的相应值，且当墙前的被动土压力系数较小时，考虑渗流时该侧的侧压力则大于不考虑渗流时的相应值，因此，这种情况有利于挡土墙的稳定.

Seepage-induced WaterPressure and Its Influence on the Stability of Cement-soil Retaining Wall

The condition of water pressure acting on the both sides of cement-soil retaining wall is researched by computing the seepage field around the wall. It is illustrated that the coefficient of water pressure, which isn't constant along the height, is affected seriously by some factors, e.g., the distribution and relative hydraulic permeability of the soil beside the wall, the hydraulic permeability of its foundation, and the buried depth of the impervious layer. As a whole, the lateral pressure acting on the wall based on seepage is always smaller than that without regard to seepage in the non-excavated zone. Moreover, the pressure based on seepage is greater than that without regard to seepage in the excavated zone if the coefficient of passive pressure is smaller than 1.176. This case is of great advantage to the stability of the wall.