采用示踪稀释法检测基坑渗漏问题研究  

Study on the Leakage Problem of Foundation Pit Using Tracer Dilution Method

作　　者：周建 何英建 熊世强 ZHOU Jian;HE Yingjian;XIONG Shiqiang(Sinohydro Bureau 7 Co.,Ltd.,Chengdu 610213)

机构地区：[1]中国水利水电第七工程局有限公司,四川成都610213

出　　处：《四川水力发电》2023年第5期47-52,共6页Sichuan Hydropower

摘　　要：硬梁包水电站首部枢纽工程覆盖层深厚,地质条件复杂,各个地层相互影响。鉴于其工程地质条件的特殊性,振冲桩施工会破坏地层而造成基坑渗漏,不仅会影响基坑处的施工安全,也严重影响到整个工程的施工进度。阐述了采用示踪稀释法探测基坑渗漏的过程,依托硬梁包水电站二期基坑内的水位观测孔进行了流速测试,并对探测结果进行了对比分析,判断出渗漏水的来源,探明了隐患的具体位置并提出了防渗处理建议,有效保障了基坑工程的施工。The headworks of the Yingliangbao Hydropower Station has deep overburden and complex geological conditions and and various strata interact with each other.In view of the particularity of engineering geological conditions,the construction of vibrating piles will damage the stratum and cause the foundation pit leakage,which not only affects the construction safety of the foundation pit,but also seriously affects the construction progress of the whole project.This paper adopts the tracer dilution method to detect foundation pit leakage,relies on the second phase foundation pit of Yingliangbao Hydropower Station to carry on the flow rate test with the water level observation hole,and conducts a comparative analysis of the detection results to determine the source of the seepage water leakage,explore the specific location of the hidden danger and put forward the anti-seepage treatment suggestions.It can effectively guarantee the smooth construction of foundation pit.

关 键 词：硬梁包水电站 基坑渗漏 示踪稀释法 检测 

分 类 号：TV7[水利工程—水利水电工程] TV52TV22TV223TV551