摘要
TBM掘进至深埋软弱地层时,围岩收敛变形较大,容易对护盾造成挤压从而导致卡机。为了降低TBM掘进过程中的卡机风险,采用自动化任务处理程序和光纤通讯技术,以护盾内表面应变测量作为预警指标,提出一种具备无人值守、数据自动采集传输、远程操控和系统自检功能的TBM卡机实时监测预警方法。依托兰州水源地TBM开挖引水隧洞工程,将该监测预警方法进行应用。结合卡机事故调查报告,分析现场监测数据和掘进参数,结果表明该方法能够有效地实现TBM卡机预警。同时,根据护盾内表面各测点应变的时空变化规律,可以推测护盾外表面围岩荷载作用的方位和变化趋势,能够为掘进参数调整和现场事故处理提供依据。
The deformation of surrounding rock is prone to be large when TBM tunnelling into deep and weak ground,and the surrounding rock may squeeze TBM shield easily,then the jamming accident will happen.In order to reduce the risk of TBM jamming during tunnelling process,the monitored strain of internal shield surface was taken as the early warning index,and a real-time monitoring and early warning approach of TBM jamming was proposed.Based on the automatic task processing program and optical fibre communication technology,the proposed approach was equipped with functions of unattended operation,automatic data acquisition and transmission,remote control and automatic self-test.This monitoring and early warning approach was applied to the TBM tunnel of Lanzhou water resource project.Combined with the investigation report of the TBM jamming accident,the field monitoring data and operation parameters were analysed.The results show that the proposed approach can provide a potential effective way for early warning of TBM jamming.At the same time,according to the spatial and temporal variation law of the strain at each measuring point of internal shield surface,the direction and variation trend of the load acting on external shield surface can be speculated,which can provide references for tunnelling parameter adjustment and accident treatment during tunnelling process.
作者
刘泉声
刘鹤
张鹏林
黄兴
罗慈友
桑昊旻
LIU Quansheng;LIU He;ZHANG Penglin;HUANG Xing;LUO Ciyou;SANG Haomin(State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,Hubei 430071,China;School of Civil Engineering and Architecture,Wuhan University,Wuhan,Hubei 430072,China;Key Laboratory of Geotechnical and Structural Safety Engineering of Hubei Province,Wuhan University,Wuhan,Hubei 430072,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2019年第S02期3354-3361,共8页
Chinese Journal of Rock Mechanics and Engineering
基金
国家重点基础研究发展计划(973)项目(2015CB058102,2014CB046904)
国家自然科学基金资助项目(41807250)。
关键词
隧道工程
TBM卡机
实时监测
预警
tunnelling engineering
TBM jamming
real-time monitoring
early warning
