【摘要】 利用南宁膨胀土的物理力学性质,建立均质土坝模型,针对广西地区的气候条件,并根据非饱和膨胀土的强度随含水量变化的规律,利用数值模拟的方法研究在降雨条件下膨胀土坝填筑过程中的稳定性分析以及降雨持时对分层填筑的影响,并得到了膨胀土坝在降雨入渗后,其稳定性受到影响的结论,为土坝填筑施工参数的控制提供依据和注意事项。更多还原

【Abstract】 Homogeneous soil dam model has been established using the physical and mechanical properties of Nanning expansive soil.Against the climatic conditions in Guangxi area and according to the variation of unsaturated expansive soil strength with water content,the stability of expansive soil dam during filling under rainfall condition and the influence of rainfall duration on layered filling are separately analyzed using numerical simulation.The result appears that the stability of expansive soil dam would be affected after rainfall infiltration,which provides basis and precautions for parameters control of dam construction.更多还原