摘要
以苏州中环城市快速路北段工程湖中明挖隧道段为工程背景,分析了高渗压地层条件下地下连续墙成槽过程中频繁出现槽壁坍塌现象的原因,基于该工程"地下水渗透压力差高、土体工程性能差、小距离并行高速铁路"的难点,提出了包括"施打三轴搅拌槽壁加固桩、小区域井点降水、水泥土搅拌封闭桩及实时监测反馈技术"等在内的一套地下连续墙施工技术,有效保障了地下连续墙的顺利施作。
Based on an open-excavated tunnel in lake, the reasons that causing collapse of trench frequently under high seepage pressure was analyzed. A set of diaphragm wall construction technology was proposed to correspond to the difficulties of this project, such as high seepage pressure, poor engineering property of soil and nearby paralleling high-speed railway. This technology includes three axes agitating piles to reinforcing the trench, well point dewatering in the small region, cement-soil mixing piles to blocking dewatering region and real-time monitoring and feedback. Construction efficiency of the diaphragm wall was guaranteed with the set of technology. This successful project example provide a reference for the design and construction of diaphragm wall under similar engineering conditions in China.
作者
蒋树磊
杨世锋
杨令航
师文明
邹福青
单清红
Jiang Shulei;Yang Shifeng;Yang Linghang;Shi Wenming;Zou Fuqing;Shan Qinghong(China Railway 14th Corporation Mega Shield Construction Engineering Co.,Ltd,Nanjing 210000,China;Qingdao Metro Group Co.,Ltd,Qingdao 266000,China)
出处
《山西建筑》
2018年第30期144-146,共3页
Shanxi Architecture
关键词
地下连续墙
槽壁稳定性
槽壁加固桩
小区域井点降水
concrete diaphragm wall
stability of trench
trench reinforcement piles
well point dewatering in the small region
