富水地区管线不迁改时的连续墙逆做方法研究

摘要

以富水地区的地铁车站人民路站为例，介绍一种在不迁改横跨基坑的重要市政管线前提下施做围护结构的新方法地下连续墙逆做法，即先施工管线影响范围以外的正常段连续墙并预留接驳，然后对市政管线进行悬吊保护，在围护未形成封闭的条件下进行基坑开挖，并针对管线影响范围内的连续墙采用边开挖边喷锚的施做方式，使得围护结构逐渐形成封闭，完成基坑的土方开挖与支护工程，保证地铁车站的施工工期。本工程取得了较好的实践效果。%This article takes Renmin Road station as an example to introduce a new method of continuous wall construction without relocation of important municipal pipelines. This method is called up-bottom construction of continuous wall and applied to construct the continuous walls outside the affected range of pipeline with reservation of connection and then protect the municipal pipeline by suspension, and proceeds to pit excavation before an enclosure is closed. The continuous walls within the affected range of pipeline are conducted with shot-anchoring following excavation to form an enclosure and complete pit excavation and support. Thus, construction progress is guaranteed with good results.