于桥水库大坝渗流监测资料分析

Dam Seepage Monitoring Data Analysis of Yuqiao Reservoir

本文分别对于桥水库大坝坝体与坝基渗流监测资料、纵横剖面渗流场、渗压水位统计模型、坝基位势过程线以及坝后渗流量等项目进行了分析。结果表明,左残丘坝段基础存在砾碎石层,灌浆防渗效果不明显,坝体浸润线较高,坝基渗压水位与库水位相关性强;水中倒土坝段坝基渗压水位与库水位相关性高,高喷墙防渗效果未达到预期目的;右岸轻碾压坝段,坝基渗压水位与库水位相关性强、位势高;放水洞与坝体接触部位可能存在接触渗漏隐患;其他坝段的渗流状态正常。文中取得分析结论,为于桥水库大坝的渗流安全评价提供了重要基础支撑。

In this paper,dam body and dam foundation seepage monitoring data,vertical and horizontal profile of dam seepage field,statistical model of seepage water level,potential process line in dam foundation,dam seepage flow and so on for Yuqiao reservoir are analyzed respectively.Results indicate that:in the left monadnock part,gravel stone layer exists in dam foundation,along with unconspicuous anti-seepage effect of grouting,high dam saturation line,and strong correlation of dam foundation seepage water level and reservoir water level;in the inverted earth part,correlation of dam foundation seepage water level and reservoir water level is strong,and anti-seepage effect of jet grouting wall fails to reach the expected goal;in the right light rolling compaction part,correlation of dam foundation seepage water level and reservoir water level is strong and potential is high;in the contact part of water release tunnel and dam body,there may be a contact leakage hidden danger;seepage of other dam parts are normal.Analysis conclusion in this paper provides an important basic support for dam seepage safety evaluation of Yuqiao reservoir.