长江冲积一级阶地超深环形基坑渗漏多源检测技术研究

Research on Multi-source Leakage Detection Technology for Ultra-deep Annular Foundation Pit in the First Terrace of the Yangtze River

超深基坑止水帷幕渗漏的检测与处置在超深基坑施工过程中起着举足轻重的作用,通过非开挖技术手段对渗漏缺陷进行预测预报及综合评估,可以更准确地指导超前补强措施,从而降低渗漏修复成本,更有效规避基坑风险,保证基坑施工安全。本文结合地质和支护设计资料,对现场测取的多源数据进行对比分析,并将多源数据和最终开挖验证的结果进行了印证,对长江冲积一级阶地超深圆环型基坑在施工过程中的渗漏检测积累理论和实践经验。

The detection and disposal of water-stop curtain leakage in ultra-deep foundation pits plays a pivotal role in the construction of ultra-deep foundation pits.The use of trenchless technology to predict,forecast and comprehensively evaluate leakage defects can provide more accurate guidance reinforcement measures,thereby reducing the cost of leakage repair,more effectively avoiding the risk of foundation pits,and ensuring the safety of foundation pit construction.In this paper,combined with geological and supporting design data,a comparative analysis of the multi-source data obtained on site is carried out,and the multi-source data and the final excavation verification results are confirmed.The ultra-deep circular foundation pit in the first terrace of the Yangtze River accumulate theoretical and practical experience in leakage detection during construction.