临岩堆边坡填方高速公路稳定性评价研究

Study on Stability Evaluation of Expressway Filling on Linyandui Slope

西南地区地质条件较差,广泛存在松散岩堆边坡,天然岩堆呈极限平衡状态,具有潜在失稳风险。在岩堆边坡新建填路,在外力作用下岩堆边坡极限平衡打破,填方道路可能出现失稳,填方边坡薄弱面发生局部或整体滑动,威胁高速公路工程建设。本文以云南岩堆边坡填方高速公路为典型实例,通过收集资料岩堆内部沉积结构特征,反演分析岩堆边坡稳定状态和参数,进一步分析运用数值模拟分析得到填方道路稳定性与变形破坏之间的关系,验证了加固岩堆边坡填方道路稳定特性,证明施工方案的可靠性。

The geological conditions in the southwestern region are poor,and there are widespread loose rock slopes.Natural rock piles are in a limit equilibrium state,with potential instability risks.A new filling road is built on the rock slope,and under the action of external forces,the limit equilibrium of the rock slope is broken.The filling road may become unstable,and the weak surface of the filling slope may experience local or overall sliding,posing a threat to highway engineering construction.This article takes the filling expressway of Yandui Slope in Yunnan Province as a typical example.By collecting data on the internal sedimentary structure characteristics of Yandui Slope,inverting and analyzing the stability status and parameters of Yandui Slope,and further analyzing the relationship between the stability and deformation failure of the filling road using numerical simulation analysis,the stability characteristics of the reinforced Yandui Slope filling road are verified,and the reliability of the construction plan is proven.