摘要
三峡库区重庆云阳县渠马镇渠龙村滑坡体积约468×10^(4 )m^(3),属大型滑坡,目前处于蠕动~挤压变形阶段,有整体滑动的可能。通过详勘和工程监测,分析研究了大型滑坡存在的可能性、滑坡基本特征及稳定性.研究结果表明:①该滑坡区域属于构造剥蚀中切割台状丘陵地貌,共发育三级风化剥蚀台面,与对岸斜坡属同一地质成因;②研究区不存在大型滑坡,该滑坡仅由4个小型~中型独立滑坡组成,单个滑坡最大体积约15.7×10^(4) m^(3),其余斜坡体整体稳定;③砂泥岩的易滑地层、陡缓相间的地形、地表水大量入渗等因素导致了滑坡的发生;④针对有直接威胁对象的2#和4#滑坡采取的抗滑支档与截排水工程整治,有效地保证了滑坡稳定。研究结果可为类似滑坡灾害的判定和整治提供参考依据。
Based on the preliminary survey results and investigation reports,the landslide volume in Qulong Village,Quma Town,Yunyang County,Chongqing is about 468×10 cubic meters.The size of this landslide belongs to a large landslide and this landslide is currently at the stage of creeping compression deformation,which may cause overall sliding hazard.Throughout several field detailed investigations,detailed exploration and engineering monitoring,the possibility of the existence of the large-scale landslide,the basic characteristics and stability of the landslide are analyzed and studied.The results show that;(1)The landslide area has a three steps terrace topography in the rolling hill area with tectonic eroded cuttings.Its geologic formation is the same as the slope cross the river.(2)There is no previous large landslide in the study area.The landslide is only composed of four small to medium-sized independent landslides,and the maximum volume of a single landslide is about 15.7×104 cubic meters,and other slopes are generally stable;(3)Landslides are triggered by many factors such as,the prone sliding formation of sand mudstone,the steep and gentle terrain,large amount of surface water infiltration,etc.;(4)The sliding mitigation support and drainage measures are adopted for the No.2 and No.4 landslides which have direct threat objects.These measures effectively improve the stability of the landslides.The results can provide a reference for the judgement and mitigation of similar landslide hazards.
作者
罗军
张卢明
LUO Jun;ZHANG Luming(Nuclear Industry Southwest Survey&Design Institute Co.Ltd.,Chengdu 610061)
出处
《土工基础》
2023年第4期587-593,共7页
Soil Engineering and Foundation
基金
国防基础科研计划项目(咨国防[2017]1790号)。
关键词
三峡库区
大型滑坡
判识
稳定性
整治
Three Gorges Reservoir Area
Large-Scale landslide
Identification
Stability:Mitigation Measure
