摘要
在降雨与浅层滑坡稳定性关系的研究中,目前的研究往往忽略了降雨类型的影响.因此,选取4种具有代表性的降雨类型:均匀型、递增型、递减型以及峰值型为对象,基于Rosso提出的降雨强度与地下水关系模型,构建考虑降雨类型的浅层滑坡地下水位高度随降雨时间的变化关系,研究不同降雨类型对浅层滑坡地下水位变化的影响.进而,结合无限边坡理论,建立浅层滑坡的稳定性计算模型,研究不同降雨类型对浅层滑坡稳定性的影响.研究结果表明:降雨类型对浅层滑坡稳定性的影响是明显的,递增型降雨作用下的浅层滑坡安全系数最小,其次是均匀型降雨,再次是峰值型降雨,最大的是递减型降雨;同时在确定浅层滑坡临界降雨量和进行区域浅层滑坡易发性研究时降雨类型的影响不容忽视.
The effect of the rainfall patterns is often ignored in studies of the relationship of rainfall versus shallow stability of landslide. This paper takes four representative rainfall patterns including uniform, delayed, advanced and central ones as the object of study to explore the effect of the rainfall patterns on the height of ground water , based on the hillslope hydrological model proposed by Rosso. And then the infinite slope failure model is applied to establish the stability calculation model for shallow landslide, and the effect of the rainfall patterns on shallow landslide stability is analyzed. Results show that rainfall patterns have strong effect on the stability of shallow landslide, with the delayed rainfall having the lowest safety factor for shallow landslide, followed by uniform rainfall, then central rainfall, and lastly the advanced rainfall. It is found necessary to consider the effect of rainfall patterns for determining of the critical rainfall and analyzing of the susceptibility of shallow land- slide in a region.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
2014年第9期1357-1363,共7页
Earth Science-Journal of China University of Geosciences
基金
国家自然科学基金项目(Nos.41401004
41272346)
国家科技支撑项目(No.2011BAK12B03)
中国科学院山地灾害与地表过程重点实验室自主基金项目
关键词
地下水
浅层滑坡
降雨类型
稳定性
无限边坡
地质灾害
underground water
shallow landslide
rainfall patterns
stability
infinite slope
geologic hazard.
