大直径超小半径转弯可回退TBM设计及应用  

Design and Application of Large Diameter Ultra Small Radius Turning Retractable TBM

作　　者：于洋 YU Yang(China Railway Construction Heavy Industry Corporation Limited,Changsha Hunan 410100,China)

机构地区：[1]中国铁建重工集团股份有限公司,湖南长沙410100

出　　处：《铁道建筑技术》2024年第11期93-97,108,共6页Railway Construction Technology

基　　金：广州市科技计划项目(20220602JBGS01)。

摘　　要：为解决某隧洞工程9 m直径TBM施工R100 m大角度水平转弯、长距离快速回退、洞内二次始发的难题,设计一种大直径、超小半径转弯、可回退TBM及其配套的出渣、物料运输系统。该TBM在双护盾TBM基础上,取消尾护盾、辅推油缸、管片拼装机,同时结合了敞开式TBM的拱锚网喷支护系统,并进行一系列针对性设计,包括刀盘扩挖、阶梯式盾体、铰接前盾尾壳、可摆动扭矩梁、后配套拖车转向轮对、短喷混桥、小转弯皮带机、出渣系统、可收缩前盾、盾体姿态调节液压系统、可路径预测和纠偏的导向系统、盾体循迹控制系统。该TBM成功完成总长270 m的100 m半径转弯施工和2000 m回退,并形成一套小转弯掘进、回退施工的理论计算、掘进参数、设备操作经验、施工管理措施。To solve the problems of large angle horizontal turning,long-distance rapid retreat,and secondary starting inside the tunnel during the construction of a 9 m diameter TBM R100 m tunnel project,a large-diameter,ultra small radius turning,retractable TBM and its supporting slag and material transportation system are designed.On the basis of the double shield TBM,this TBM eliminates the tail shield,auxiliary thrust cylinder,and pipe assembly machine.At the same time,it combines the anchor net spray support system of the open TBM.A series of targeted designs are carried out,including cutterhead expansion excavation,stepped shield body,hinged front shield tail shell,swingable torque beam,rear trailer steering wheel set,short spray hybrid bridge,small turning belt conveyor,slag removal system,retractable front shield,shield body posture adjustment hydraulic system,path prediction and correction guidance system,and shield body tracking control system.The TBM successfully completed a 100 m radius turning construction with a total length of 270 m and a 2000 m retreat,and formed a set of theoretical calculations,excavation parameters,equipment operation experience,and construction management measures for small turning excavation and retreat construction.

关 键 词：大直径TBM TBM 超小半径转弯 TBM 回退 TBM 操作 

分 类 号：U455.31[建筑科学—桥梁与隧道工程]