【摘要】 地震力和地下水渗流共同作用条件下的饱和填土土压力的计算问题是土力学中土压力课题研究的热点和难点所在。对地下水渗流流线为竖直向下的稳定渗流(问题1)和流线弯曲、地下水从挡土墙排出的稳定渗流(问题2)2种简化状态,基于拟静力法和库仑土压力理论,建立了动主动土压力的计算公式。通过和前人研究的对比分析,验证了该计算公式的可靠性,讨论了填土内摩擦角对动主动土压力的影响。结果表明,总动主动土压力随填土有效内摩擦角的增大均呈非线性减小变化,且问题2的总主动土压力随有效内摩擦角增大的减小变化更显著。更多还原

【Abstract】 To calculate the earth pressure in saturated soil mass subjected to earthquake forces and groundwater seepage,two cases,in which the seepage states are steady but the shapes of the flow lines are different,are investigated.The two cases are Case 1,in which the flow line is vertical downward,and Case 2,in which the flow line is curve toward retaining wall.Based on the pseudo-static method and Coulomb’s theory,the formula to calculate the seismic active earth pressures in Cases 1 and 2 is proposed.The comparison of the results with the published work indicates that the suggested formula is reasonable.The influence of the soil effective internal friction angle on the seismic active earth pressure is also discussed.The results indicate that the total seismic active earth pressure is decreasing nonlinearly with the increase of the soil effective internal friction angle.And the decrement of the total seismic active earth pressure in Case 2 is larger than that in Case 1.更多还原