地下水作用时侧向压力的计算

Study on calculation of lateral pressure under action of subsurface water

水土合算方法,未考虑孔隙水对土粒的浮力的影响,侧向水压力不应该乘与之不相干的土压力系数,由此会造成主动土压力偏小,被动土压力偏大;静水压力的水土分算法,在支护结构底端,基坑内外水压力不能平衡,静水压力对土压力贡献过大,造成主动土压力偏大,被动土压力偏小.理论上对水土分算和水土合算两种算法进行了论证,并提出考虑孔隙体积渗流力的水、土分算法.

Studied the method that did not consider the parewater effect on the floatage of the soil grain. Lateral pressure of subsurface water should not multiply the soil pressure coefficient that has nothing to do with the subsurface water. This way may reduce the figure of the active earth pressure and may increase the figure of the passive earth pressure. The calculation method of hydrostatic pressure cannot achieve the equilibrium with the external and internal water pressure in the foundation pit. If the hydrostatic pressure action to the earth pressure increases, the active earth pressure will increase and the passive earth pressure will decline. Put forward a new method in different ways considering the seepage pressure action. 