摘要
为解决盾构穿越锚索群施工时锚索难处理的问题,以深圳地铁9号线西延线工程的4个盾构区间为例,通过尝试方案1(人工挖孔竖井+穿心千斤顶拔除)、方案2(人工挖孔竖井+套管钻机拔除)、方案3(人工挖孔竖井+旋挖钻拔除)、方案4(暗挖+空推处理)、方案5(旋挖钻拔除+地面加固强推)和方案6(地面直接加固+盾构强推),总结该线路锚索处理及盾构穿越的施工经验。研究结果表明:1)方案5是最合适的处置方案;2)人工挖孔竖井与其他方式结合的方案均不可靠;3)方案4工期长、费用高、地面沉降难控制;4)方案6使得盾构在锚索段掘进时转矩增大、掘进速度下降,且开舱换刀的频率和次数较高。故盾构施工穿越锚索群时,推荐首选旋挖钻拔除+地面加固强推的方案。
When shield tunneling through anchor cable group,anchor cables should be removed.In this paper,a case study is conducted on four shield sections of west extension line of Shenzhen metro line 9,and six schemes are studied,including manual excavated shaft+anchor cable removing by cavity jack(scheme 1),manual excavated shaft+anchor cable removing by casting pipe(scheme 2),manual excavated shaft+anchor cable removing by rotary drill(scheme 3),mining excavation+shield advancing without force(scheme 4),anchor cable removing by rotary drill+ground reinforcement and shield pushing(scheme 5),and direct ground reinforcement+shield pushing(scheme 6).The shield tunneling construction experience and the anchor cable treatment technology are summarized.The results show the following:(1)The scheme 5 is optimal.(2)The schemes with manual excavated shaft are not feasible.(3)The scheme 4 has disadvantages such as long construction period,high cost,and difficult control of ground settlement.(4)The scheme 6 will increase the shield torque and cutter replacing times and reduce the tunnel speed.Accordingly,the scheme 5 is recommended.
作者
杨立涛
邓峰
石红兵
邝利军
陈泽
衣利伟
YANG Litao;DENG Feng;SHI Hongbing;KUANG Lijun;CHEN Ze;YI Liwei(China Construction Infrastructure Co.,Ltd.,Beijing 410004,China;China Construction South Investment Co.,Ltd.,Shenzhen 518103,Guangdong,China;China Construction Fifth Engineering Division Co.,Ltd.,Changsha 410004,Hunan,China)
出处
《隧道建设（中英文）》
CSCD
北大核心
2021年第S02期494-502,共9页
Tunnel Construction
关键词
地铁
盾构
锚索群
人工挖孔竖井
旋挖钻拔除
地面加固
metro
shield
anchor cable group
manual excavated shaft
anchor cable removing by rotary drill
ground reinforcement
作者简介
第一作者:杨立涛(1970-),男,河北安国人,1993年毕业于重庆建筑工程学院,工业与民用建筑专业,本科,高级工程师,主要从事基础设施建设工作。E-mail:286068582@qq.com;通信作者:陈泽,E-mail:905173792@qq.com。
