摘要
库岸高填方路堤的稳定性受库水位涨落影响较大,同时,采用不同的土水特征曲线,边坡的稳定性计算结果也不相同。计算了当边坡土体的饱和含水量、饱和渗透系数相同时,3种不同的土水特征曲线对应的边坡安全系数,并得到了以下结论:土水特征曲线对考虑非饱和特性的土质边坡安全系数影响较大;采用黏土土水特征曲线计算出的边坡安全系数较粉土和砂类土质大;水位下降时,采用砂类土的土水特征曲线计算出的安全系数降低值较大;一般情况下计算非饱和特性的边坡稳定性时应选取合理的土水特征曲线。
The stability of high embankment reservoir bank is influenced immensely by the fluctuations of water level.At the same time,slopes which have different characteristics of soil water characteristic curve have different results of stability calculation.The slope safety coefficient is calculated in this paper,which is in the same saturated soil water content and saturated hydraulic conductivity but is different in soil water characteristic curve.There are three types of curves.The following conclusions are received after the calculation.The soil water characteristic curve impacts more obviously on soil slope considering the soil＇s non-saturation.The safety coefficient which is calculated by clay soil water characteristic curve is bigger than by silt and sandy soil.When the water level falls down,the safety coefficient＇s lower value is bigger if sandy soil＇s soil water characteristic curve is chosen.Generally,the appropriate soil water characteristic curve should be selected when the slope stability in unsaturated soil is calculated.
出处
《公路》
北大核心
2011年第10期18-22,共5页
Highway
关键词
库水位
土水特征曲线
基质吸力
稳定性分析
water level of bank
soil water characteristic curve
matrix suction
stability analysis
