无水大粒径卵砾漂石地层盾构选型研究  

Selection of a Shield for Tunnelling in Waterless Strata with Large-Particle Cobbles and Boulders

作　　者：郭彩霞[1,2] 王梦恕[1] 孔恒 乔国刚 史磊磊[2] 

机构地区：[1]北京交通大学,北京100044 [2]北京市市政四建设工程有限责任公司,北京100176 [3]北京市政建设集团有限责任公司,北京100048

出　　处：《现代隧道技术》2014年第4期13-17,共5页Modern Tunnelling Technology

摘　　要：文章依托北京地铁9号线工程实例,针对北京典型无水大粒径卵砾漂石地层盾构施工所面临的问题,提出了"以疏为主、以隔为辅"的盾构设备选型理念,开展了盾构机刀盘、刀具、加泥及泡沫系统、螺旋输送系统、同步注浆系统、刀盘驱动系统等关键设备的适应性研究和改造升级。实践证明,改造升级后的盾构设备适用于北京典型无水大粒径漂卵砾石地层,极大地提高了掘进速度,降低了建设成本。Aimed at the problems encountered during shield tunnelling in a waterless strata with large-particle cobbles and boulders in Beijing, and using the construction of Beijing Metro Line 9 as an example, this paper puts forward a shield-selection concept, i.e. ＂discharging as the main measure, sealing as the supplementary measure,＂ and conducts adaptability research and upgrades to some key equipments like the cutterhead, cutting tools, slurry and foam injection system, screw conveyor system, synchronous grouting system, and eutterhead driving system. The results show that the upgraded shield has a higher driving speed and lower construction costs, and is applicable to the waterless strata with large-particle cobbles and boulders.

关 键 词：卵砾漂石地层 盾构选型 设备配置 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]