摘要
在对降雨入渗及其引发边坡失稳机制的研究基础上,基于饱和非饱和渗流数学模型,运用延伸的摩尔库伦强度理论,对某库岸堆积体斜坡进行了降雨过程的饱和非饱和渗流场计算和稳定分析.表明降雨是导致库岸堆积体滑坡的主要外动力因素之一,并得出了在采用实际可能降雨特征时,库岸堆积体的最小安全系数发生在雨后一定时间内的结论,这与实际工程情况相吻合,可更合理的解释因降雨引发的库岸堆积体滑坡问题.
The percolation process and conditions of rainfall into accumulation slope is studied based on mechanism of sliding due to rainfall infiltration; a reservoir embankment accumulation slope＇s saturated/unsaturated seepage field and its stability are calculated based on extended Mohr-Coulomb strength law. Calculation results show that the sliding of reservoir embankment accumulation slope is due to strong rainfall; and after decades of hours of rainfall cessation the minimum safety factor of the slope appears; this phenomenon is in accordance with practical slope failure process. Research indicates that possible rainfall characteristics should be adopted in the first place when the slope＇s rainfall process stability modeling is required.
出处
《三峡大学学报（自然科学版）》
CAS
2008年第1期21-26,共6页
Journal of China Three Gorges University：Natural Sciences
基金
国家自然科学基金(50579010)
国家973计划课题(2002CB412707)
国家自然科学基金(50539010)
国家自然科学基金委员会、二滩水电开发有限责任公司雅龙江水电开发联合研究基金项目(50539030)
国家自然科学基金雅龙江水电开发联合研究基金重点项目(50539110)
关键词
库岸堆积体
降雨入渗
饱和非饱和渗流
稳定分析
实际降雨特征
reservoir embankment accumulation slope
saturated/unsaturated seepage
rainfall infiltration
stability analysis
practical rainfall property
