小直径双护盾TBM卡机脱困技术应用  

Application of Small Diameter Double Shield TBM Jamming Escape Technology

作　　者：李栋伟 LI Dong-wei(Sinohydro Bureau 3 Co.,Ltd.,Xi′an 710024,China)

机构地区：[1]中国水利水电第三工程局有限公司,西安710024

出　　处：《价值工程》2024年第36期67-70,共4页Value Engineering

摘　　要：随着国内工程建设的需要,新的地下工程大量开工建设,不良地质时有出现,如泥石流、突涌水、断层破碎带等不良地质洞段,给施工单位带来较大的困扰和处理难度,其中断层破碎带及围岩收敛变形在山岭隧道中为最常见的不良地质。通常TBM在遭遇断层破碎带后,刀盘前方掌子面岩体出现大面积塌方,埋压刀盘及盾体,导致TBM扭矩及推力超限,无法掘进;同样,TBM掘进至岩石较硬的地质洞段,主机盾体区域开挖形成后岩体易发生应力变化,导致盾体被岩体包裹挤压,造成卡机,致使TBM无法向前掘进。本文通过对小直径双护盾TBM在遭遇破碎带及围岩收敛变形后的卡机脱困处理技术优化进行总结,指导类似工程在该类问题中高效处理,已到达快速通过的目的,降低长时间停机,提高TBM施工效率。With the demand for domestic engineering construction,a large number of new underground projects have started construction,and adverse geological conditions such as mudslides,sudden water surges,and fault fracture zones often occur,which bring great difficulties and challenges to construction units.Among them,fault fracture zones and surrounding rock convergence deformation are the most common adverse geological conditions in mountain tunnels.Usually,when TBM encounters a fault fracture zone,the rock mass in front of the cutterhead collapses extensively,burying and pressing the cutterhead and shield body,resulting in TBM torque and thrust exceeding the limit and unable to excavate.Similarly,when TBM excavates to geological tunnel sections with harder rocks,the rock mass is prone to stress changes after the excavation of the main engine shield area,causing the shield to be wrapped and compressed by the rock mass,resulting in machine jamming and preventing TBM from advancing.This article summarizes the optimization of the jamming and rescue technology for small-diameter double shield TBM after encountering fractured zones and surrounding rock convergence deformation,guiding similar projects to efficiently handle such problems,achieving the goal of rapid passage,reducing long-term downtime,and improving TBM construction efficiency.

关 键 词：双护盾TBM 破碎带 围岩收敛 变形、卡机 脱困 

分 类 号：TV523[水利工程—水利水电工程]