摘要
基于饱和-非饱和渗流理论,对模型边坡在设计降雨方案条件下的饱和渗透系数、降雨强度、降雨历时及边坡坡度的大小对土体边坡安全系数的影响规律进行了研究。研究结果表明:随边坡饱和渗透系数增大,边坡安全系数逐渐降低,但当渗透系数增大到一定程度时,边坡安全系数变化幅度逐渐趋于平缓;随降雨历时增长,安全系数在降雨开始到降雨停止后一段时间内都表现出逐渐降低的趋势,随后安全系数又随时间增长而开始缓慢增大;不同坡度状态下边坡安全系数都随降雨历时增长而变化,其对边坡安全系数的影响大于降雨对边坡安全系数的影响。
Based on saturated-unsaturated seepage theory, the influence law of saturated seepage coefficient, rainfall intensity, rainfall duration and slope gradient on slope safety coefficient was studied. Results showed that, with an increase in slope saturated seepage coefficient, slope safety coefficient gradually decreases, but such change tends to slow as the slope saturated seepage coefficient increases to a certain degree. With an increase in rainfall duration, safety coefficient tends to gradually decrease from starting to the end of rainfall. After that, the safety coefficient begins to increase slowly with the time increasing. Safety coefficient for different slope state changes with the increase of rainfall duration. The influence of rainfall duration on slope safety coefficient is greater than that of rainfall.
出处
《矿冶工程》
CAS
CSCD
北大核心
2012年第1期9-11,16,共4页
Mining and Metallurgical Engineering
基金
湖南省交通科技计划项目(2011FJ3114)
西部交通科技计划项目资助(2009318000048)
湖南省交通厅科技资助项目(2009003)
关键词
降雨入渗
土体边坡
稳定性
有限元分析
rainfall infiltration
soil slope
stability
finite element analysis
