某水电站坝基扬压力异常原因分析  

Causal analysis on abnormity of uplift pressure of a dam

作　　者：朱凯[1,2,3] 梅一韬[1,2,3] 刘敬洋[1,2,3] 任泽栋[1,2,3] 张凤山[1,2,3] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [2]河海大学水资源高效利用与工程安全国家工程研究中心,江苏南京210098 [3]河海大学水利水电学院,江苏南京210098

出　　处：《人民长江》2013年第1期52-56,共5页Yangtze River

基　　金：国家自然科学基金资助项目(51139001;51179066;51079046;50909041);新世纪优秀人才支持计划资助(NCET-11-0628;NCET-10-0359);河海大学水文水资源与水利工程科学国家重点实验室专项基金(2009586012;2009586912;2010585212)

摘　　要：坝基扬压力监控在重力坝安全监控中占有十分重要的地位,通过对某水电站坝基扬压力监测资料的定性分析发现,5号坝段坝基扬压力测值偏高,并有逐渐增加的趋势。进而通过扬压力折减系数、简单相关系数法、统计模型法、综合成因分析法等方法对该坝段进行定量分析,发现该坝段测孔扬压力折减系数偏大,测孔水位与上游水位相关性较大,进一步证明5号坝段下游侧可能存在潜在渗流通道,应加强监测,并在必要时采取工程措施。The monitoring of uplift pressure in dam foundation is an important measure to ensure the safety operation of a dam. Based on the qualitative analysis of the observed hydraulic uplift pressure of a dam foundation, we find the hydraulic uplift pressure in the No. 5 dam block is high and has a further upward tendency. The high uplift pressure in the dam block is analyzed by uplift pressure reduction coefficient method, simple correlation method, statistical model method and comprehensive analytical method. The results reveal that the uplift pressure reduction coefficient and the correlation between the water level in monitoring hole and the water level of reservoir is higher, which indicates that a potential bidden seepage pass exists in its foundation, so the monitoring work should be strengthened.

关 键 词：扬压力 定性分析 定量分析 统计模型 坝基中图法 

分 类 号：TV697[水利工程—水利水电工程]