摘要
为了实现对斜坡稳定性的可视化分析与预测,以楚雄双柏一斜坡作为研究工点,在数字高程模型(DEM)的基础上,结合降雨量、地形地貌、土的特性等因素,运用降雨阈值模型计算斜坡单元变形失稳所需临界降雨量,分析降雨入渗以及地形坡度对斜坡稳定性的影响。比较模型预测结果与斜坡实际监测结果表明,降雨阈值模型能较好地模拟斜坡各单元产生滑坡失稳的诱因,即所需降雨量大小;当降雨量大于各单元产生滑坡失稳的临界值时,该单元即有可能产生失稳滑动。模型预测的产生滑坡的斜坡单元与现场失稳情况较为一致。
In order to realize visual analysis and prediction of slope stability, a worksite slope in Shuangbai, Chuxiong is investigated. Based on digital elevation model（DEM）, combining the factors such as rainfall, topography and geomorphology, and soil characteristics, the threshold rainfall for deformation and instability of the slope unit is calculated by the rainfall threshold model. And the effects of rainfall infiltration and gradient on slope stability are analyzed. Comparing the results between the model prediction and the actual monitoring of slope stability, it is shown that the rainfall threshold model can simulate well the needful rainfall which can induce the instability of slope in each unit. The unit of slope may be instable when the rainfall is larger than the rainfall threshold of slope. The simulation result fits the real slope instability cases very well.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2012年第7期1484-1490,共7页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(40572159
40772189)
NSFC–云南联合基金重点项目(U1033601)
关键词
边坡工程
降雨阈值
降雨型滑坡
数字高程模型
滑坡分布
预测
slope engineering： rainfall threshold： rainfall-induced landslides
digital elevation model
landslide distribution＇ prediction
