输水盾构隧道技术在青草沙原水工程中的应用

Segmental Tunnelling Applied to Water Convey in Qingcaosha Raw Water Project

输水隧道是城市原水输送的一种新方式,它可以充分利用地下空间资源、有效减少原水输送工程沿线的占地拆迁。上海青草沙原水输送隧道设计采用重力流方式输水,使用期间隧道结构将承受一定的内水压力;隧道工程穿越长江主航道,拟采用盾构法施工一次推进完成,长距离穿越具有很大的挑战。论文简要评述国内外输水盾构隧道工程技术发展趋势,结合软土盾构隧道的建设经验分析青草沙输水盾构隧道建设需要突破的若干关键技术,以推动输水盾构隧道的技术进步。

The raw water convey tunnel is a new form of water transmission in the city, which makes full use of the underground space and minimizes land acquisition along the conveyor works. Shanghai qingcaosha raw water convey tunnel is designed for gravity flow and will be under some internal water pressure when in service. The tunnel is to cross the main channel of the Yangtze River through one drive of segmental tunnelling, whose long distance is a great engineering challenge. The development trend of segmental tunnelling for water convey at home and abroad was introduced in this paper, and with the experience in segmental tunneling through the soft ground, analysis is made of some key techniques that the project construction needs to breakthrough, thus to bring the technology further advanced.