污染地层泥水平衡盾构施工关键技术  

Key Construction Technology of Slurry Balance Shield in Pollutant Stratum

作　　者：杨志勇[1] 江玉生[1] 雷军 安宏斌 

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083 [2]中铁十二局集团第二工程有限公司,山西太原030032

出　　处：《施工技术》2014年第23期118-120,共3页Construction Technology

基　　金：国家科技支撑计划子课题(2013BAB10B02-4);铁道部科技研究开发计划项目(2010G016-J)

摘　　要：以北京地铁7号线08标百子湾站—化工路站区间隧道穿越污染地层为工程背景,根据土层和地下水污染情况,基于泥水平衡盾构施工的特点,对现有泥水平衡盾构进行了创新性改造,采用加强型盾尾刷、卡箍式泥水管路连接方式,在隧道内布置有害气体吸附装置和监测仪,增强了盾构在污染地层中的适应性。并在施工过程中及时进行二次补浆、采用改良装置封闭洞门和加强洞内通风等施工措施,有效避免施工人员接触污染物,确保了人员安全。Based on the interval tunnel between Baiziwan and Huagong Road in Beijing Metro Line 7 Lot8,according to soil and groundwater pollution conditions,based on the characteristics of slurry balance shield construction,the authors creatively transformed existing slurry balance shield,adopted enhanced shield tail brush and the connection mode of clamp slurry pipeline,and fixed absorption device of harmful gas and monitoring instrument in tunnels,which strengthened the adaptability of shields in pollutant stratum. And during construction,the methods of making the second fill pulp timely,adopting improved device closure portal and strengthening tunnel ventilation,effectively avoided the workers to touch pollutions,ensured construction safety.

关 键 词：地铁 污染地层 盾构 泥水平衡盾构 施工技术 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]