重庆市鸡冠石污水处理厂滑坡成因分析及治理对策

基于鸡冠石污水厂的地理位置及地质环境条件,从由地形条件、现场钻探、探槽和现场位移确定的观测滑坡边界、滑体物质结构特征中的粉质粘土和碎石土、滑坡特征、滑坡变形破坏迹象、由工程地条件、受有效应力原理决定的水的活动及人类工程活动等方面,深入分析了该滑坡的形成条件、主控因素及原抗滑桩失效原因等,分析结果表明,大量的松散堆积物和岩层的顺向坡、不当的人工开挖卸载、地下水及降水渗入和生活废水无序排放是诱发滑坡的控制因素。提出治理措施应因地制宜,对已有的抗滑桩地段,宜采用桩板体系进行支挡,并控制好爆破程度及施工进度,做好截水沟等排水措施和加强滑坡变形观测。

Formation analysis and control countermeasures of the landslide in Jiguanshi Wastewater Treatment Plant, Chongqing City

Based on the place and geologic condition of landslide in Jiguanshi wastewater treatment plant,according to land slide boundary which comes from terrain,drilling in situ,exploratory trench and displacement,the characters of landslide mass that is consist of silty clay and soil aggregate,land slide features,deformation destruction phenomena,underground movement which has been affected by project geology and effective stress principle and the human engineering activities,main controlling factors and forming conditions of the ladslide and the causes of anti-piles disabled are analyzed in detail in this paper.The results reveal that lots of loose deposit,the consequent rock slope,improper excavation unloaded, the groundwater permeated and life waste water that are discharged unorderedly are control factors.Some treatments such as reinforced anti-piles,controlled blasting and construction are provided in this paper.