岩土力学Issue(z2)：247-251,5.
土坡失稳的有效降雨量研究
On effective rainfall of slope instability
摘要
Abstract
The shallow instability of granite residual soil slope could easily induced by rainfall. Based on the analyses of influence of rainfall on the water content of slope soil, the effective rainfall resulting in soil from unsaturated to saturated condition is derived from the relationship between saturation and water content. Results show that not all rainfall will cause the instability of soil slope, and only when the soil saturation caused by rainfall infiltration reaches a certain degree the slope fails. There exists a critical depth in the unsaturated and saturated zone of slope above which the rainfall infiltration leads to a transition in soil from unsaturated to saturated, different shear strength could be used to calculate the stability of soil which was divided into fluctuation two parts by the critical depth. The soil unsaturated zone and saturated zone can be taken to calculate the stability of the soil condition. The results are useful for determining rainfall threshold of slope instability, so as to further understand the mechanism of landslide instability and landslide prediction.关键词
边坡/有效降雨量/临界深度Key words
soil slope/effective rainfall/critical depth分类
建筑与水利引用本文复制引用
简文彬,许旭堂,郑敏洲,柳侃,赖树钦..土坡失稳的有效降雨量研究[J].岩土力学,2013,(z2):247-251,5.基金项目
福建省地质灾害重点实验室开放基金资助(No.FJKLGP2012K001)。 （No.FJKLGP2012K001）
