腰坑水库均质坝渗流稳定安全评价分析  

Safety evaluation and analysis of seepage stability of homogeneous dam in Yaokeng reservoir

作　　者：杨镇全 Yang Zhenquan(Guangzhou Zhuzheng Engineering Construction Management Co.,Ltd.,Guangzhou 510000,Guangdong)

机构地区：[1]广州筑正工程建设管理有限公司,广东广州510000

出　　处：《吉林水利》2021年第6期53-57,共5页Jilin Water Resources

摘　　要：我国早期修建的水库均质坝大部分已进入“老龄化”阶段,坝体的渗流和稳定问题是水库正常运行关注的焦点。为了研究腰坑水库均质坝的渗流特征和坝坡稳定,采用理正岩土软件计算了在不同运行工况下该大坝的浸润线逸出点高程、渗透坡降以及上下游坝坡的稳定安全系数,结果表明:(1)在各运行工况下,该均质坝坝体的渗透坡降均小于允许值,浸润线逸出点均不在下游坝坡内;(2)当坝体形成稳定渗流和非稳定渗流时,坝坡的安全系数均大于规范最小允许值,认为大坝当前整体是稳定的。但由于腰坑水库年久失修,有必要采取工程措施对大坝做防渗处理,进一步保证水库的安全运行。As most of the homogeneous dams built early in China have entered the“aging”stage,problems of stability and seepage are the emphasis of the normal operation of the reservoirs.In order to study the seepage characteristics and slope stability of the homogeneous dams,Lizheng geotechnical software was used to calculate the elevation of seepage line exit point,seepage slope and stability safety factor of upstream and downstream dam slopes under different operation conditions.The results show that:(1)under each operation condition,the seepage slope of the homogeneous dam is less than the allowable value,and the exit point of the seepage line is not in the downstream dam slope;(2)when the dam soil forms stable seepage and unstable seepage,the safety factor of the dam slope is greater than the minimum allowable value of the code,which indicates that the whole dam is stable.However,due to the disrepair of Yaokeng Reservoir,it is necessary to take engineering measures to prevent seepage of the dam to further ensure the safe operation of the reservoir.

关 键 词：均质坝 渗流 渗透坡降 安全系数 

分 类 号：TV139.14[水利工程—水力学及河流动力学]