高水位超厚浅层砂性土层地下连续墙施工技术  

Construction Technology for Underground Continuous Walls in High Water Level and Super-thick Shallow Sandy Strata

作　　者：张竹青 ZHANG Zhu-qing(Shanghai Tunnel Engineering Co.,Ltd.,Shanghai 200082,China)

机构地区：[1]上海隧道工程有限公司,上海200082

出　　处：《价值工程》2024年第12期87-90,共4页Value Engineering

摘　　要：本文聚焦于长江口区域特有的高水位超厚浅层砂性地层条件下的地下连续墙施工技术。以上海轨道交通崇明线工程2#大小盾构转换段为工程背景,介绍了在该不良地质条件下未采用槽壁加固即进行地下连续墙施工时,通过采用喷射井点降水法及施工中对泥浆性能的把控等技术措施,解决了塌方、缩孔等施工难题,达到了施工质量控制要求。This paper focuses on the construction technology of underground continuous walls under the unique conditions of high water level and extremely thick shallow sand layers in the Yangtze River Estuary area.Taking the Shanghai Rail Transit Chongming Line Project Section 2#shield tunnel conversion segment as the engineering background,this paper introduces the construction of underground continuous walls without using slot wall reinforcement under adverse geological conditions.Through the adoption of technologies such as jet well point dewatering and control of mud performance during construction,problems such as collapse and shrinkage of holes in construction are solved,and the requirements for construction quality control are achieved.

关 键 词：超厚浅层砂性地层 地下连续墙 喷射井点 泥浆 

分 类 号：TU476.3[建筑科学—结构工程]