引绰济辽工程二标隧洞段TBM滚刀磨损规律

Wear law of TBM cutter in the tunnel section of the second bid of the Chaoer River to Xiliao River Water Conveyance Project

通过在引绰济辽工程二标隧洞段隧道掘进机(tunnel boring machine,TBM)刀盘上搭载刀盘状态监测系统,实现TBM掘进中滚刀磨损的实时监测。基于监测系统的实时滚刀磨损记录,获得单滚刀全寿命磨损规律。将单滚刀全寿命磨损过程分为低速磨损、加速磨损和均速磨损3个阶段,磨损过程中刃宽变化对滚刀速率影响显著。通过在TBM掘进过程中跟踪记录岩体条件,结合TBM掘进参数和监测数据,分析地层参数和掘进参数对滚刀磨损速率的影响。结果表明:滚刀破岩体积磨损速率较适合用于衡量滚刀磨损速率;岩石磨蚀性、岩体完整性和岩体可掘性指数是影响滚刀磨损速率的关键参数,可为将来精细滚刀磨损预测模型研究提供依据。

The real-time monitoring of the cutter wear was realized during TBM tunneling by installing a cutterhead working status monitoring system on the cutterhead of TBM in the tunnel section of the second bid,the Chaoer River to Xiliao River Water Conveyance Project.The whole life wear process curve for a single cutter was obtained on basis of the monitored data.The wear process of a single cutter could be divided into three stages,namely low cutter wear rate at the initiation stage,acceleration cutter wear stage and uniform cutter wear stage.The cutter edge shape had a significance impact on the cutter wear curve.Based on the rock mass conditions recorded during TBM tunneling process,combined with TBM operating parameters and monitoring data,the influence of the rock mass parameters and TBM operating parameters on the cutter wear rate was analyzed.The results showed that the cutter wear value per unit broken rock volume was suitable to measure the cutter wear rate,and the rock abrasivity,rock mass integrity and field penetration index were the key parameters to affect the cutter wear rate,which could provide a basis for the accurate cutter wear prediction model in the future research.