古田溪四级大坝坝基扬压力综合分析  

Comprehensive Analysis of Uplift Pressure for Gutianxi Dam Ⅳ Foundation

作　　者：陈兰[1,2,3] 何金平[4] 陈浙新[1,2,3] 王少伟[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 [4]武汉大学水利水电学院,湖北武汉430072

出　　处：《水电能源科学》2011年第11期80-82,212,共4页Water Resources and Power

基　　金：国家自然科学基金资助项目(51079046;50909041;50809025;50879024);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资助项目(2009586012;2009586912;2010585212);中央高校基本科研业务费基金资助项目(2009B08514;2010B20414;2010B01414;2010B14114);中国水电工程顾问集团公司科技项基金资助项目(CHC-KJ-2007-02);江苏省"333高层次人才培养工程"基金资助项目(2017-B08037);江苏省普通高校研究生科研创新计划基金资助项目(CX09B_163Z);高等学校博士学科点专项科研基金资助项目(20070294023)

摘　　要：为确保大坝渗流安全,从扬压力角度定性分析了古田溪四级大坝坝基扬压力监测资料,计算了高水位时段的渗压系数,并运用逐步回归分析法建立了扬压力统计模型对其进行定量分析。结果表明,扬压力受上游水位、降雨、温度和时效的影响,其中时效分量在各分量中占主导因素。扬压力纵向分布除渗#1测压孔外,总体呈河床坝段低、岸坡坝段高的特点,横向分布为从上游至下游测压孔水位逐渐降低,扬压力变化规律正常,对坝基稳定不构成威胁。但渗#1测压孔扬压水位明显异常增大,需进一步分析论证。To ensure the safety of dam seepage, the uplift pressure monitoring data of Gutianxi Dam IV foundation is analyzed qualitatively from the perspective of uplift pressure. And then the seepage pressure coefficients for high water level period are calculated. At the same time, stepwise regression analysis method is used to establish statistical model of uplift pressure and analyze quantitatively. The results show that the uplift pressure of Gutianxi Dam IV foundation is in- fluenced by upstream water level, rainfall, temperature and aging; aging component is the dominant factor; vertical distribution discipline of uplift pressure is low at river dam and high at slope dam except pressure tap ^# 1; transverse distribution discipline is that water level of pressure tap declines from upstream to downstream; the variation of uplift pressure is normal, and it does not pose a threat on the clam stability; but the uplift pressure water level of pressure tap ^# 1 increases abnormity and further analysis is required.

关 键 词：坝基 扬压力 监测资料 统计模型 古田溪四级大坝 

分 类 号：TV698.12[水利工程—水利水电工程]