基于声呐渗流检测的地下连续墙渗漏处置措施研究

Study on the Disposal Measures of Retaining Structure Leakage Based on Sonar Seepage Detection

南京地铁5号线前庄站基坑利用预埋在基坑地下连续墙中的测斜孔进行现场地下水声纳渗流检测,定量、定位的分析了基坑开挖施工过程中可能出现的地下水异常渗流的特征部位。在检测结果与地下连续墙施工过程资料对比分析的基础上,对地下连续墙缺陷位置采取针对性的预处理措施,有效降低了基坑土方开挖过程中围护结构渗漏风险,保障了前庄站基坑安全高效施工,可为后续类似工程提供参考。

In the foundation pit of Qianzhuang station of Nanjing metro line 5,the inclined hole embedded in the retaining structure of the foundation pit is used to detect the sonar seepage of groundwater in the site.The characteristics of groundwater abnormal seepage during foundation pit excavation are analyzed in a quantitative and positioning way.Based on the comparison and analysis of the test results and the construction process data of the retaining structure,targeted pretreatment measures are taken for the defective location of the retaining structure,which effectively reduces the leakage risk of the retaining structure in the excavation process of the foundation pit,ensuring the safe and efficient construction of the foundation pit in Qianzhuang station and providing references for the subsequent similar projects.