Rainfall-induced landslide stability analysis in response to transient pore pressure——A case study of natural terrain landslide in Hong Kong

查看全文 作　　者：LAN Hengxing, ZHOU Chenghu C. F. LeeWANG Sijing & WU Faquan State Key Laboratory of Natural Resources and Environmental System, Institute of Geographical Sci-ences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;Department of Civil Engineering, Hong Kong University, Hong Kong, China;3. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China 出　　处：《Science China(Technological Sciences)》索引2003年第46卷第z1期,共17页 基　　金：This work was supported by the Council of the Hong Kong Special Administrative Region, China (Grant No. HKU 7015/02E); the National Natural Science Foundation of China (Grant No. 40225004);Postdoctoral Science Foundation of China. 摘　　要：Transient pore pressure in response to short intense rainfall process plays an important role in shallow landslide occurrence. Using GIS technology, we carry out the rainfall-induced landslide stability analysis in response to transient pore pressure by means of transient and unsaturated rainfall infiltration modeling. A case study is performed on the shallow landslide stability analysis in Hong Kong. Detailed analysis and discussion reached some useful conclusions on the tempo-spatial behavior and characteristics of slope stability response and pore pressure response to typical rainfall process. Comparison analysis is performed on some important issues including landslide stability response in different types of slopes with different hydraulic properties, antecedent rainfall and landslide stability, and the nature of pore pressure response time. These studies might give us an important insight into landslide tringgering mechanism and the hydrological process in response to rainfall, and provide systematic information and evidences for effective risk assessment and warning system establishment. 关 键 词：rainfall-induced landslide, TRANSIENT PORE pressure, LANDSLIDE stability in RESPONSE to rainfall, GIS.