期刊论文

Liu, X.-X.(liuxinxi1963@126.com)

中文

岩土力学

1000-7598

2007

28

8

1705-1709

10.3969/j.issn.1000-7598.2007.08.033

教育部新世纪优秀人才支持计划（No.NECT040723） 湖北省青年杰出人才基金（No.2005ABB022） 湖北省自然科学基金（No.2004ABA058）.湖南省建设厅资助项目（No.200508）

本校为其他机构

降雨入渗是影响边坡稳定性、导致边坡失稳的最主要和最普遍的环境因素.强风化软岩用于高填方路堤填土边坡时,填土的压实度直接影响路堤土的渗透性和强度.利用饱和与非饱和渗流有限元模拟降雨入渗时高填方路堤的暂态渗流场,将计算得到的暂态孔隙水压力分布用于边坡的极限平衡分析,并考虑基质吸力对非饱和土抗剪强度的影响.探讨降雨强度、持时和压实度对边坡稳定性的影响.研究表明,强风化软岩用于高填方路堤压实度不能低于90%;当暴雨强度为200 mm/d时,边坡就会失稳.其成果将为高填方路堤边坡防护设计提供科学依据.

It is evident that the rainfall has a remarkable effect on slope stability. When the highly weathered soft rock is used for high-filled embankment slope ,compacting factor directly effects on permeability and intensity of embankment soil . Transient seepage due to the rainstorm infiltration is computed using the finite element method. The computed transient pore water pressures are then used for limit equilibrium analyses of landslides. And effects of matrix suction on shear strength of unsaturated soils are considered. Effects of the compacting factor and intensity and duration of rainfall ev...