软弱地基土石坝坝基抗滑稳定计算及加固处理  

Anti-sliding stability calculation and reinforcement treatment of earth rock dam foundation on soft ground

作　　者：孔凡辉 王丽华 花俊杰 黄元 KONG Fanhui;WANG Lihua;HUA Junjie;HUANG Yuan(Changjiang Survey Planning Design&Research Co.,Ltd.,Wuhan 430010,China;Wulong District Water Authority of Chongqing City,Chongqing 408500,China)

机构地区：[1]长江勘测规划设计研究有限责任公司,湖北武汉430010 [2]重庆市武隆区水务局,重庆408500

出　　处：《人民长江》2018年第19期53-57,75,共6页Yangtze River

基　　金：国家重点研发计划项目(2017YFC0404805;2017YFC0404804)

摘　　要：抗滑稳定是软弱地基上土石坝坝基安全的关键问题之一,其抗滑稳定计算及加固处理技术也一直是学者研究的热点。以深厚覆盖层软弱地基上的仙女山水库土石坝为背景,针对软弱土层抗剪能力低、坝基深层抗滑稳定安全系数低于规范要求的问题,通过渗流和抗滑稳定计算,并进行加固措施对比分析,提出了在大坝下游坡脚设置压重体的处理措施。计算结果表明:在大坝下游设置压重体后,坝基深层抗滑稳定安全系数满足规范要求,且压重体结构简单、施工快捷,可为类似工程的坝基抗滑稳定加固处理提供借鉴。Anti-sliding stability is one of the key issues in the foundation safety of earth-rock dam on soft ground.The anti-sliding stabilization and reinforcement technology has been a hot topic.Taking the earth-rock dam of Xiannushan Reservoir on the soft ground with deep overburden as the background,aiming at the shear resistance of weak soil layer and lower safety factor of deep anti-slide stability of dam foundation that are blow the code requirements,the treatment measures of installing a weight body at the dam toe are put forward through seepage and anti-sliding analysis.The calculation results show that safety factor of deep anti-slide stability of dam foundation meet the code requirements and the weighting body is simple in structure and easy to construction,which can be referred in anti-sliding stability reinforcement of dam foundations.

关 键 词：坝基深层抗滑稳定 土石坝 压重体 淤泥质黏土 仙女山水库 重庆 

分 类 号：TV698[水利工程—水利水电工程]