摘要
针对青海引大济湟调水总干渠引水隧洞TBM掘进机在特大断层、高海拔、大埋深等不良地质条件下工作卡机、掘进速度慢的技术难题,结合现场地质、岩性和TMB机工作特性,对卡机原因进行了分析研究,并由此提出相应脱困措施与应用技术。研究表明,特大断层开挖面塌方及高地应力造成的围岩过大收敛变形,是造成掘进机卡机和设备损坏的根本原因。短进尺、强支护、超前物探和实时变形监测是规避卡机的有效措施。卡机后应进行临时顶拱及方木支护,按照前盾脱困-支撑盾至尾盾支护变形置换的步骤进行脱困施工。
Aiming at the technical problems of TBM tunneling machine jamming and slow tunneling speed in the main diversion tunnel of Qinghai Yindajihuang water diversion project under the condition of super-large fault,high altitude,large buried depth and other bad geology,combined with the site geology,lithology and the working characteristics of TMB machine,the reasons of the machine jamming are analyzed and studied,and the corresponding measures and application technology are proposed.The study shows that the collapse of excavation face of superlarge fault and the excessive convergence deformation of surrounding rock caused by ground stress are the fundamental reasons for the jam of road header and the damage of equipment.Short footage,strong support,advanced geophysical prospecting and real-time deformation monitoring are effective measures to circumvent the card machine.The temporary roof arch and square timber support should be carried out after the machine is jammed,and the construction should be carried out according to the steps of the front shield release-support shield to tail shield support deformation replacement.
作者
张伟峰
王海平
赵鑫
ZHANG Weifeng;WANG Haiping;ZHAO Xin(Qinghai Provincial Yindajihuang Project Management Bureau,Xining,Qinghai 810000,China)
出处
《水利与建筑工程学报》
2018年第6期160-164,共5页
Journal of Water Resources and Architectural Engineering
关键词
TBM
卡机
不良地质
脱困措施
应用技术
TBM
jamming
unfavorable geological condition
relief measures
applied technology
