Studies of rainfall-induced slope failures
Studies of rainfall-induced slope failures
复制标题
降雨引起的边坡破坏研究
DOI：
--
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
H. Rahardjo
中科院分区：
文献类型：
--
作者：
H. Rahardjo
降雨诱发的边坡失稳是山区陡峭残积土边坡的常见问题。土体的水流特性、孔压变化和抗剪强度是非饱和土边坡稳定性分析的主要参数，而非饱和土体的稳定性直接受土壤-大气界面的通量边界条件(入渗、蒸发)的影响。给出了将非饱和-饱和土体作为一个整体系统进行边坡稳定性分析的方法。文中还强调了表征土壤性质、通量边界条件、孔隙水压力的时空变异性以及用于边坡稳定性评估的仪器的程序和重要性。并通过实例说明了如何使用这些程序在考虑当地环境因素的情况下生成本地斜坡的稳定性评估图表。
Rainfall-induced slope failures are common problems in steep residual soil slopes in the trop- ics. The characteristics of water flow, pore-water pressure changes, and shear strength of soils are the main parameters associated with slope stability analysis involving unsaturated soils which are directly affected by the flux boundary condition (infiltration, evaporation) at the soil-atmosphere interface. Procedures for slope stability analyses considering unsaturated-saturated soils as an integral system are presented. The paper also highlights procedures and the importance of characterizing soil properties, flux boundary conditions, spatial and temporal variability of pore-water pressures and instrumentation for slope stability assessment. It has also been shown through examples how these procedures can be used to generate stability assessment charts for local slopes under local environmental considerations.