复杂地质条件下超深地下连续墙施工技术探讨

On the Construction Technology of Super Deep Underground Continuous Wall under Complex Geological Conditions

本基坑工程地处南京长江漫滩,地质条件复杂、超厚砂层,采用深62.5m地下连续墙作为围护结构。本文论述了地下连续墙施工工艺以及施工过程中采取的槽壁加固、控制泥浆性能指标等技术措施,基本解决了穿越较厚粉砂层、卵砾石层成槽困难,施工难度大的问题,取得了较好的施工效果。

This foundation pit project is located in Nanjing Yangtze River floodplain, with complex geological conditions and ultra thick sand, so the 62.5m deep underground continuous wall is used as the retaining structure. This paper discusses the construction technology of underground continuous wall and construction process control of reinforcement, mud performance and other technical measures, and basically solved the difficulty in crossing thick silty sand and gravel. Good construction effect has been obtained.