摘要
以土壤体积含水率作为控制变量 ,应用非饱和土水分运动基本理论建立了降雨入渗过程中土体瞬态含水率的计算模型并且编制了计算程序 ,在计算模型中通过改变边界条件考虑了降雨过程中土壤入渗能力的变化 ,采用非饱和土强度理论和极限平衡方法 ,得出了可以考虑基质吸力影响的边坡安全系数计算公式 ,编制了计算程序 ,最后通过具体的算例 ,讨论了降雨入渗对土质边坡稳定性的影响。
The solpes are designed with enough safety in many excavations. Sometimes, some of them occur land slides after a rain infiltration. One important reason is that the water content of soils is increased after the rain infiltration. So the safety of slope is closely related to the rain infiltration, but it is difficult to establish a rational model. A model considering the effects of the rain infiltration on transient safety of unsaturated soil slope is proposed in the paper, and a computer program is developed. It is based on the water movement theory. The water content is chosen as the control quantity in the model. The soil infiltration capacity changing with the rain infiltration is considered by adjusting boundary conditions. The slope stability influenced by the rainfall infiltration is also discussed in detail.
出处
《土木工程学报》
EI
CSCD
北大核心
2001年第5期57-61,共5页
China Civil Engineering Journal
基金
国家自然科学基金重点资助项目 (No :597381 60 )
