武汉长江隧道工程盾构始发井施工关键技术  

Key Construction Technology of Shield TBM Launching Shaft of Wuhang Yangtze River Crossing Tunnel

作　　者：卢智强[1] 王超峰[1] 

机构地区：[1]中铁隧道集团,河南洛阳471009

出　　处：《隧道建设》2006年第1期49-52,共4页Tunnel Construction

摘　　要：武汉长江隧道工程盾构始发井工程位于长江南岸,施工场地距长江约500m,为长江一级阶地,地质条件差,承压水位高,且承压水与长江水有联系。同时基坑开挖深度大,周边环境复杂,施工难度极大。结合该工程介绍了高承压水软土地区深基坑防水、减压降水、基底加固等关键施工技术,根据规范和经验公式并对施工引起周边环境的沉降进行了评价。The shield TBM launching shaft of Wuhan Yangtze River Tunnel Project is located on the south bank of Yangtze River, about 500m away from the Yangtze River, where the geology is of first bench terrace with poor geological condition and high level of artesian water connecting with the water in Yangtze River. Furthermore, the excavation of the foundation pit is deep and the surrounding environment is complicated. This paper introduces some technologies of deep foundation pit in soft soil with high artesian water pressure such as water proofing key construction , de-watering by reducing pressure and foundation bottom consolidation, and evaluates the settlement in surrounding area caused by construction according to relevant specifications and empirical formula.

关 键 词：承压水 深基坑 基底加固 基坑降水 

分 类 号：U455.43[建筑科学—桥梁与隧道工程] U455.8[交通运输工程—道路与铁道工程]