敞开式-单护盾双模式TBM钢管片结构设计与分析  

Design and Analysis of Steel Segment Structure of Open-Type Single-Shield Dual-Mode TBM

作　　者：王挺 Wang Ting

机构地区：[1]中交天和机械设备制造有限公司,北京市100044

出　　处：《工程机械》2025年第4期171-176,I0008,I0009,共8页Construction Machinery and Equipment

摘　　要：以国内EH引水隧道工程建设为实例,考虑到敞开式TBM在通过软弱、破碎围岩等松散体时,隧道撑靴作用面会出现打滑、塌方等情况,造成撑靴无法为推进液压缸提供推进反力,影响TBM正常掘进和施工安全,因此,提出了基于敞开式-单护盾双模式TBM钢管片支护结构的辅助推进方案。对钢管片支护结构进行了适应单护盾和敞开式TBM掘进、支护的参数设计,建立了其在推进和脱困两种不同工况下的受力模型,在此基础上进行了数值模拟分析,判断其整体结构是否合理,是否满足强度条件,并针对钢管片薄弱部位进行了结构改进,改进后薄弱部位最大应力降低57.4%,实现了TBM穿越不良地质安全、高效支护和掘进,增强了敞开式TBM在大埋深、软弱地层等复杂环境适应性,为工程实际应用提供了理论依据和参考。Taking the construction of domestic EH diversion tunnel project as an example,considering that the acting surface of the tunnel gripper may slip or collapse when the open-type TBM passes through loose bodies such as the soft and broken surrounding rock mass,resulting in inability of the gripper to provide thrust counterforce for the thrust cylinder,which affects the normal boring and construction safety of the TBM,an auxiliary thrust plan based on the steel segment support structure of the open-type singleshield dual-mode TBM is proposed.The parameters of the steel segment support structure adapting to the single-shield and open-type TBM boring and support are designed,its stress model under two different working conditions of thrust and breakout is established,and numerical simulation analysis is performed on this basis to judge whether the overall structure is reasonable and whether it meets the strength conditions.Structural improvements are made for the weak parts of the steel segment,and the maximum stress on the improved weak parts decreases by 57.4%,which achieves safe and efficient support and boring for the TBM passing through bad geological conditions,enhances the adaptability of open-type TBM in complex environments such as deep buried and weak strata,and provides theoretical basis and reference for practical engineering applications.

关 键 词：双模式TBM 辅助推进 钢管片 数值模拟分析 

分 类 号：U45[建筑科学—桥梁与隧道工程]