摘要
为解决在武汉长江一级阶地且极复杂的施工环境下进行盾构接收的高风险问题,结合地铁7号线王家墩东站—新华路站盾构区间工程实例,通过方案比选及优化,盾构接收端头土体采用高压旋喷桩+玻璃纤维筋灌注桩的水泥系加固与垂直冻结法相结合的加固方式,并辅以钢套筒完成盾构接收。通过对冻结效果进行验算,并按照施工时序归纳盾构接收流程、接收阶段主要施工参数及盾构二次进洞施工方案,阐述组合方案在盾构进洞施工中的实践应用。实践证明组合方案技术性高、实施可行性强,无需进行地面交通疏解和管涵改移,能有效地避免盾构接收过程中涌水、涌砂等风险,节约工程成本近500万,综合效益显著,以期为今后类似工程方案的设计与应用提供参考。
For the high risks of shield arrival in complex construction environment of the first terrace of Yangtze River,the method of combining vertical ground freezing and cement improvement,i.e.high pressure rotary jet pile and glass fiber reinforced pile,is taken to improve soil on shield ends in Wangjiadun East to Xinhua road section of Metro line 7 in Wuhan after solution comparison and optimization.Freezing effect is checked,and shield arrival process,main construction parameters in receiving stage,the construction scheme of two-time shield arrival are summarized to elaborate the application of combined schemes in shield arrival construction.It is proved that the combined solution is technically feasible,and it can effectively avoid the risk of water and sand gushing without surface traffic untwining and pipeline relocation when shield tunneling reaches the arrival area,which can save nearly 5 million RMB and bring significant comprehensive benefits.It is hoped to provide better reference for the similar project in the future.
作者
徐锦斌
王锋
傅聪
宋巍
XU Jinbin;WANG Feng;FU Cong;SONG Wei(Wuhan Metro Group Co.,Ltd.,Wuhan 430000,China)
出处
《隧道建设（中英文）》
北大核心
2019年第S02期358-365,共8页
Tunnel Construction
关键词
盾构接收
方案优化
组合加固
水泥系
冻结法
钢套筒
shield arrival
scheme optimization
combination improvement
cement system
ground freezing
steel sleeve
作者简介
第一作者:徐锦斌(1989-),男,湖北荆州人,2014年毕业于北京交通大学,岩土工程专业,硕士,工程师,现从事轨道交通项目建设管理工作。E-mail:jinbinxuwsd@163.com。
