北京地铁无水砂卵石地层盾构施工技术难点及施工对策研究  

Research on Technology Difficulties and Construction Countermeasures of Shield Tunneling of Beijing Metro with Waterless Sandy Gravel Stratum

作　　者：王岩 钱新 李旸 薛建领 闫雷 

机构地区：[1]北京住总市政工程有限责任公司,北京100029

出　　处：《铁道标准设计》2013年第8期97-101,共5页Railway Standard Design

摘　　要：针对土压平衡盾构在砂卵石地层掘进中经常出现土压建立困难,刀盘推力与扭矩大且磨损严重,经常出现刀盘"卡死"、螺旋输送机磨损严重及抱死现象,采取对土体进行塑流化改良、刀盘改造及刀具优化、调整注浆配比等措施,很好地控制了地面沉降,确保了该区间的顺利贯通。It was hard to establish earth pressure balance for an earth pressure balance shield machine （EPBM） tunneling in a sandy gravel stratum. Moreover, because there were far too strong thrust force and torque force with heavy wearing in shield cutterhead, some adverse phenomena frequently appeared in shield machine such as： deadlocking of cutterhead, and the heavy wearing or locking of screw conveyor. Aimed at above-mentioned phenomena, these countermeasures were employed： improving the soil body towards good plastic flow property, transforming the cutters, optimizing the cutterhead, adjusting the grouting proportion and so on, so that the ground subsidence was able to be controlled effectively and this section with sandy gravel stratum was able to be tunneled through successfully.

关 键 词：地铁 盾构隧道 砂卵石地层 施工 

分 类 号：U231.3[交通运输工程—道路与铁道工程] U455.43[建筑科学—桥梁与隧道工程]