摘要
大坝实测运行性态通过监测设施长期监测获取。为评价某面板堆石坝的实测运行性态,对该大坝变形、渗流、周边缝变形、面板钢筋应力等实测量进行分析,数据分析采用特征值统计、过程线和分布图绘制。通过分析得出如下结论:通过13 a的运行,大坝变形总量不大,目前变形已基本稳定;周边缝三向变形后,周边缝后渗压均不大,周边缝防渗较好;大坝总渗漏量主要受库水位影响,与国内外同级别面板堆石坝相比,大坝渗漏量不大,面板、趾板、帷幕等所组成的防渗体系较好;左岸绕坝渗流不明显,右岸发育张裂缝,存在一定的绕坝渗流;钢筋计应力变化和分布规律符合一般规律,最大压应力小于钢筋强度,且整体处于稳定状态。综合评判该面板堆石坝运行性态良好,相关成果可供其它同类工程借鉴。
The measured operational state of the dam is obtained through long-term monitoring by monitoring facilities.In order to evaluate the actual performance of a concrete face rockfill dam,the deformation,seepage,deformation of the surrounding seam,and the stress of the steel bar are analyzed.The data analysis is drawn by the characteristic value statistics,the process line and the distribution map.According to the analysis of the monitoring results of a high face rockfill dam,the following conclusions are drawn:(1)after 13-year operation,the total deformation of the dam is not huge,and the deformation is basically stable at present.(2)After the three-way deformation of peripheral joints,the seepage pressure of the surrounding joints is small,and the peripheral joints are impervious.(3)The total leakage of the dam is mainly influenced by the reservoir water level.Compared with the same grade face rockfill dam at home and abroad,the leakage of the dam is not large,and the seepage control system,such as the panel,the toe plate and the curtain,is better.(4)The seepage on the left bank is not obvious,and there are cracks in the right bank,and there is a certain seepage around the dam.(5)The variation of stress and distribution law of steel bar conform to the general law.The maximum compressive stress is less than the strength of reinforcing bar,and the whole is in a stable state.This paper comprehensively evaluates that the face rockfill dam has good operation performance,and the relevant results can be used for reference by other similar projects.
作者
肖璐
刘媛媛
张俊嵩
吕高峰
XIAO Lu;LIU Yuanyuan;ZHANG Junsong;LYU Gaofeng(Jiangdu Water Conservancy Project,Yangzhou 225200,China;Hangzhou National Hydropower Project Dam Safety and Emergency Enginering Technical Center Corporation Limited,Hangzhou 311122,China)
出处
《人民珠江》
2019年第2期128-135,共8页
Pearl River
关键词
面板堆石坝
监测
运行性态
变形
渗流
face rockfill dam
monitor
operational state
deformation
seepage
作者简介
肖璐,女,主要从事水利工程管理研究。E-mail:lv_gf2@ecidi.com.
