岩土力学2012，Vol.33Issue(5)：1519-1526,8.
降雨条件下露天平台边坡的稳定性研究
Research on open-pit platform slope stability under rainfall condition
摘要
Abstract
The mechanical strength and water conduction characteristic of rock mass near the surface are mainly controlled by joints and fractures. The ubiquitous joint mechanical model and saturated-unsaturated equivalent continuum media seepage model are coupled by joint connectivity rate to simulate the leading role of the joints. Based on FLAC3D, the mechanism of seepage-mechanics coupling, treatment of rainfall boundary condition and connectivity rate evolution are elaborated, as well as new multi-group ubiquitous joint model is developed. Through analysis of seepage and mechanics fields in a platform slope of Hainan iron ore under rainfall, it is shown that rock near the surface is saturated rapidly with the formation of transient saturated zone due to the rainfall. As the rain continues, the negative water pressure region has further shrunk while the transient saturated zone is just on the contrary. After the rain, the transient saturated zone begins to decrease due to rapid water pressure dissipation. The simulation also indicates that the layer is fractured and its connectivity rate is changed as well because of the seepage in rainfall process. Therefore, the coupled model above is reasonable to analyze the influence of slope stability under rainfall condition.关键词
遍布节理/连通率/平台边坡/暂态饱和区/渗流力学耦合Key words
ubiquitous joint/ connectivity rate/ platform slope/ transient saturated zone/ seepage-mechanics coupling分类
建筑与水利引用本文复制引用
石露,李小春,白冰,崔银祥..降雨条件下露天平台边坡的稳定性研究[J].岩土力学,2012,33(5):1519-1526,8.基金项目
国家自然科学基金资助项目(No.11102220). （No.11102220）
