白鹤坪边坡稳定性分析

发布时间：2018-06-21 05:52

本文选题：位移监测 + GPS　；参考：《震灾防御技术》2017年03期

【摘要】：边坡监测可为掌握边坡变形特征和规律提供依据,指导在边坡发生严重变形时的应急处理。白鹤坪边坡是三峡库区的典型边坡,依据边坡的变形特征定性地认为该边坡为潜在的推移式滑坡。1998年调查发现白鹤边坡存在一定的滑移,为了对其实施监测预报、预警,减轻因其滑动而引起的地质灾害,在该边坡上建立了由10个GPS观测点组成的边坡位移观测系统,以监测边坡的变形。本文以2014年5月至2016年4月近两年的白鹤坪边坡变形观测系统所获得的位移数据为基础,对边坡的位移变形进行了统计,并结合数值模拟分析了边坡的水平向相对位移。分析表明,在边坡由缓变陡处变形显著增加,边坡现处于基本稳定状态,其变形主要受降雨影响,每年汛期时(5—10月)边坡变形量偏高。其次为库水作用影响,江水对坡脚冲蚀,使边坡前缘局部产生了小规模崩滑现象。
[Abstract]:Slope monitoring can provide the basis for mastering the characteristics and rules of slope deformation, and guide the emergency treatment in the event of serious deformation of slope. The Baiheping slope is a typical slope in the three Gorges reservoir area. According to the deformation characteristics of the slope, it is qualitatively considered that the slope is a potential bedded slope. In 1998, it was found that there was a certain slip in the Baiheping slope. In order to monitor and forecast the slope, the slope was forewarned. In order to reduce the geological hazard caused by its sliding, a slope displacement observation system composed of 10 GPS observation points was established to monitor the slope deformation. Based on the displacement data obtained by the Baiheping slope deformation observation system from May 2014 to April 2016, the displacement and deformation of the slope are statistically analyzed, and the horizontal relative displacement of the slope is analyzed by numerical simulation. The analysis shows that the deformation of the slope increases significantly from gentle to steep, and the slope is in a stable state. The deformation of the slope is mainly affected by rainfall, and the deformation of the slope is on the high side during the flood season during May to October each year. Secondly, the effect of reservoir water, river water on slope foot erosion, leading to local slope local small scale landslide phenomenon.
【作者单位】：南京工业大学交通运输工程学院;中国地质调查局水文地质环境地质调查中心;太平洋咨询公司;
【基金】：国家自然科学基金项目(41374049);国家自然科学基金青年项目(51308291)
【分类号】：TV223

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