Research on Wear Mechanism,Prediction Methods,and Control Techniques of Shield Cutter in Karst Strata
During full-face excavation in karst strata using shield tunneling,engineering issues such as severe tool wear,uneven wear,cutterhead fractures,and blade chipping frequently occur,leading to project delays and increased maintenance costs.Thus,exploring the wear mechanism of the tools and their scientific control is of significant importance for ensuring safe construction over long distances.By analyzing the wear mechanism of the tools during excavation in rock layers and based on the principles of wear and friction,this paper proposes that the primary mechanisms of tool wear include fatigue wear,abrasive wear,and adhesive wear,all acting in concert.Using data from a shield tunneling section of a subway line in Xuzhou as a basis,we conducted a comparative analysis of the tool wear values obtained using this method,the machine learning predictions using the long short-term memory(LSTM)method,and the actual wear values.Simultaneously,based on the aforementioned theory,we proposed targeted construction control measures to reduce tool wear and extend the cutterhead's lifespan.The results indicate that,compared to traditional methods,our approach significantly improves the accuracy of tool wear predictions,reduces the time to open the cutterhead,and enhances excavation efficiency.
hard rocktool wearwear predictionlong short-term memorycontrol measures
万方数据
维普
