湖南醴潭公路土质滑坡变形破坏特征分析

Analysis on landslide deformation and destruction characteristics of soils in Litan highway in Hunan

公路土质滑坡在其滑动变形破坏的过程中,具有一定的潜伏性,不易被识别。对于该类滑坡稳定性的评价与治理,应结合其滑动变形破坏机理及规律,查明滑坡滑动的关键影响因素,以便因地制宜地进行防治。结合醴潭公路K53+960—K54+020段的具体工程边坡实例,分别运用传统的剩余推力法和数值模拟技术,分析了该边坡在自然状态、降雨及地震条件下的稳定性及变形机理,深入分析了导致该边坡变形破坏的成因,认为降雨及地震对公路土质滑坡均具有较大的诱发作用。通过对比分析,传统计算方法和数值模拟结果相符合,印证了数值模拟技术在工程应用中的可视性和实用性。

Highway soil landslide was of delitescent characteristics during its deformation and destruction and was not easy to be identified in its sliding process. In order to evaluate and manage this kind of landslide,it was necessary to combine with the sliding deformation destruction mechanism and law to find out the key factors that affect the landslide slip for prevention and control according to local conditions to improve the stability of landslide. Based on specific engineering slope examples in K53 ＋ 960—K54 ＋ 020 of Litan highway,the authors made contrast analysis on the stability and deformation mechanism of the slope in natural state conditions,rainfall and earthquake,analyzed the deformation and destruction causes of slope and found out that rainfall and earthquake played induced functions for highway soil landslide. Through contrast analysis,the traditional calculation methods and numerical simulation results matched,verifying the visibility and practicability of numerical simulation technology in engineering applications.