摘要
为解决泥水盾构在砂卵石地层施工遇见的卡刀盘、堵管、滞排、异常磨损等诸多难题,分析导致泥水盾构在砂卵石地层施工困难的因素,依托成都西环线紫瑞隧道工程展开分析,预判工程重难点,并对盾构进行针对性设计;基于高标准压力及地表沉降隆起控制要求,在砂卵石地层施工中,提出气垫泥水盾构搭载螺机技术方案,且在隧道工程中应用“螺机出渣+闭式管道输渣”技术;刀盘开挖的卵石被螺机及时输送至仓外,并通过泥浆泵及闭式管道输送至洞外,推进平稳,出渣顺畅,避免了卵石堆积引发的施工风险。工程应用证明,双模盾构相对常规气垫泥水盾构具有更强的适应砂卵石地层的能力。
When slurry shield tunneling in sandy-cobble strata,many problems will be encountered,such as cutterhead jamming,pipe blocking,stagnation,and abnormal cutter wear.Hence,the factors induce the above problems in Zirui tunnel of Xihuan road in Chengdu,China,are analyzed.The project difficulties are predicted to conduct specific design.Based on the high-standard pressure and surface subsidence requirements,the techniques of air cushion slurry shield equipped with screw conveyor and screw conveyer mucking+closed pipeline mucking are proposed and adopted.The cobble excavated by the cutterhead are timely transported to the outside of the excavation chamber by the screw conveyor,and further transported to the outside of the tunnel through slurry pump and closed pipe,so as to avoid the pebble accumulation and guarantee smooth shield tunneling.The engineering application validates that the double-mode shield is superior to conventional air cushion slurry shield in aspect of adaptability to sandy-cobble strata.
作者
贺开伟
王又增
丁梦俊
张鹏豪
苏志学
HE Kaiwei;WANG Youzeng;DING Mengjun;ZHANG Penghao;SU Zhixue(China Railway Engineering Equipment Group Co.,Ltd.,Zhengzhou 450016,Henan,China)
出处
《隧道建设（中英文）》
CSCD
北大核心
2022年第S01期508-516,共9页
Tunnel Construction
关键词
双模盾构
砂卵石地层
滞排
螺机出渣
闭式管道输渣
double-mode shield
sandy-cobble strata
stagnation
screw conveyer mucking
closed pipeline mucking
作者简介
第一作者:贺开伟(1984—),男,重庆璧山人,2007年毕业于辽宁工程技术大学,机械工程及自动化专业,本科,高级工程师,现从事地下工程装备设计研发工作。E-mail:307348631@qq.com;通信作者:王又增,E-mail:sdcxwyz@139.com。
