关中环线临渭段滑坡成因分析与防治对策

Analysis and protection of landslide in Linwei segment of Guanzhong Loop Highway

为分析陕西关中环线滑坡对公路的影响,找出滑坡的成因及整治方法,对滑坡进行实地调查,分析了气象、地形地貌、水文、地质构造、底层岩性与地震等主要孕灾环境条件,通过现场监测数据,从地层岩性、地形地貌、气象水文及地下水等方面阐述了地层岩性不均匀、地形整体性差、区域集中强降水及地下水位高等滑坡的形成原因和致灾机理,根据滑坡稳定性计算结果和地形地质条件,提出了以抗滑桩支护、地下排水和回填压脚等方式组合的滑坡综合防治对策。

To analyze the effect of the landslide along Guanzhong Loop Highway in Shaanxi Province, and find out the cause and the regulation method, the on-spot investigation is carried out. The main hazard inducing environments, such as the weath- er, topography, hydrology, geological structure, the underlying lithology and earthquake are analyzed. Then based on field monitoring data, the mechanism of uneven stratum lithology, topography, poor integrity, strong area-concentrated rainfall, and high underground water level, etc. , which are the causes of landslide, are interpreted from the aspects of formation lithology, topography, weather, hydrology and groundwater etc.. According to the calculation result on landslide stability and the geological conditions, comprehensive prevention and control countermeasures combining the anti-slide pile supporting, under- ground drainage and backfilling presser foot method are proposed.