复杂地层大直径越江盾构隧道施工重难点及关键技术——以武汉地铁12号线国-凌段越江隧道工程为例  

Construction Challenges and Key Construction Technologies for Large-diameter River-crossing Shield Tunnels in Complex Strata:A Case Study of the Running Tunnel Section between Guobo Center South Station and Lingwu Village Station of the Wuhan Metro Line 12

作　　者：陈海勇 郑晓悦 施成华[1] 史渊 孙影杰 胡俊山 王祖贤 CHEN Haiyong;ZHENG Xiaoyue;SHI Chenghua;SHI Yuan;SUN Yingjie;HU Junshan;WANG Zuxian(School of Civil Engineering,Central South University,Changsha 410075;China Railway Development and Investment Group Co.,Ltd.,Kunming 650200;China Railway Tunnel Stock Co.,Ltd.,Zhengzhou 450000)

机构地区：[1]中南大学土木工程学院,长沙410075 [2]中铁开发投资集团有限公司,昆明650200 [3]中铁隧道股份有限公司,郑州450000

出　　处：《现代隧道技术》2024年第4期244-254,共11页Modern Tunnelling Technology

基　　金：国家自然科学基金项目(52178402);中铁开发投资集团有限公司计划项目.

摘　　要：针对大直径泥水平衡盾构穿越高黏性土、角砾土和碎石土等复杂地层时的施工难题,依托武汉地铁12号线国博中心南站—凌吴村站区间越江隧道工程,从盾构设备选型、设备改造、掘进施工控制等方面提出针对性的解决处置方案。现场应用效果表明,采用增大刀盘开口率、刀盘中心区域倒锥形设计和多重组合式大流量冲刷等方式,可以解决大直径泥水盾构穿越高黏性地层时刀盘易结泥饼问题;通过刀具针对性配置、泥水舱搅拌臂加长及增设磨损检测系统等多重处理措施,使得盾构顺利通过角砾土地层,设备改造后,该地层盾构平均贯入度提高约247%;采用增设采石箱及交互式双联筛分管路系统的方式,能有效解决大直径泥水盾构穿越碎石土地层时大块碎石堵泵严重影响掘进连续性的问题。Addressing the construction challenges of large-diameter slurry balance shield tunnels passing through complex strata such as highly cohesive soil,breccia,and gravel,this paper presents targeted solutions in terms of shield equipment selection,equipment modification,and excavation control based on the river-crossing running tun⁃nel between Guobo Center South Station and Lingwu Village Station of the Wuhan Metro Line 12.Field application results demonstrate that through increasing the cutterhead opening ratio,designing an inverted cone shaped central cutterhead area,and implementing multiple combined high-flow flushing,it can effectively solve the issue of cutter⁃head mud-caking in highly cohesive strata.And through multi measures,such as the targeted cutting tool configura⁃tion,lengthening of the mixing arm in the slurry chamber,and the addition of wear detection system,the slurry balance shield smoothly passed through breccia strata,improving the average penetration rate in this strata by approximately 247%after equipment modification.Furthermore,through adding a quarry box and an interactive duplex screening pipeline system,it effectively addressed the problem of pump blocking by large gravel blocks,ensuring continuous excavation in gravel strata.These targeted equipment modifications and construction measures significantly im⁃proved tunnelling efficiency,geological adaptability,and project safety during the construction of the running tunnel section between Guobo Central South Station and Lingwu Village Station of Wuhan Metro Line 12.

关 键 词：泥水盾构 复杂地层 盾构设备选型改造 掘进施工控制 现场应用 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]