摘要
降雨是引起边坡失稳的主要原因之一,降雨要素与边坡稳定性有着复杂的关系,其中降雨强度和降雨历时起主要作用。基于多孔介质流体力学、土力学等理论,考虑不同降雨要素对饱和-非饱和土质边坡稳定性的影响,建立了降雨条件下土质边坡稳定性流固耦合模型;采用Geo-slope分析软件进行了数值求解。通过数值仿真模拟,对降雨强度和降雨历时两个影响因素进行了深入分析,得出不同条件下土质边坡稳定系数,及其与降雨强度、降雨历时之间的关系;在对降雨条件下边坡稳定性模拟预测预报的基础上,通过降雨要素与土质边坡稳定性之间关系的分析,探讨了土质边坡的安全性问题,可以为有效指导土质边坡防护工作提供理论基础。
Rainfall is one of the main causes of slope instability.There is a complex relationship between rainfall elements and slope stability.Rain fall intensity and duration play a major role.Based on hydrodynamics and soil mechanics theory of porous medium,considering the influence of different rain fall elements with the saturated-unsaturated soil slope stability,the paper established the soil-slope stability model for fluid-structure interaction under the condition of rainfall.We make a numerical solution with Geo-slope analysis software.Through the simulation,we knew the effects of rainfall intensity and duration and obtained the soil slope stability factor under different conditions and the relationship among rainfall intensity and duration.On the basis of forecast in simulation of slope stability under rainfall conditions,through the analysis of relationship between rainfall elements and soil slope stability,the article discussed the issue of soil slope safety,witch can provide the theoretical foundation for effective guidance of soil slope protection.
出处
《水资源与水工程学报》
2010年第1期42-45,共4页
Journal of Water Resources and Water Engineering
基金
国家自然科学基金项目(50374041)
国家重点基础研究发展计划(973)(2005CB221503)
