【摘要】 洪水位骤降是堤防工程稳定分析中一种非常不利的工况,通过有限元非稳定渗流分析和考虑渗流力作用的堤防稳定分析,安全系数降低幅度达到18.7%。同时考虑土体黏聚力随浸泡时间的增长而大幅度下降,对堤防工程的稳定性问题进行探讨。结果表明,考虑洪水长时间的浸泡作用,堤防工程的安全系数降低最大可达到15.4%。更多还原

【Abstract】 Abrupt recession of floodwater is the most unfavorable condition in stability analysis of embankment engineering.Results of non-stabilization flowing FEM and stability analysis of embankment in concidering the action of flowing show that the safety factor reduces by 18.7%.In this paper,an approach has been made to the stability of embankment with considering that the soil cohesiveness will greatly reduce with the increase of soaking duration.Results show that the safety factor of embankment reduces as far as by 15.5% after taking into account of the action of long soaking duration.更多还原