A mechanical method for predicting TBM penetration rates

摘要: In the tunnel boring machine (TBM) excavation process, accurate prediction of TBM performance, especially penetration rate, is great significance to in time planning, cost control, and safety judgment. this paper, we propose a method its corresponding model rate based on mechanical analysis. The variables included design parameters (tunnel radius cutter arrangement), operating (the thrust, torque revolution per minute), tensile strength. rock breakage depth single was calculated using force balance. Then, volume obtained by summing up each arrangement. Finally, premise knowing revolution, numerical solution acquired. On basis field data from 4th Section Water Supply Project Songhua River, accuracy verified 59 samples, with correlation coefficient 0.64 between actual results mean absolute percentage error 14.6%. Furthermore, basic form PR equation suitable for different projects proposed variable control method. For CREC188 particular, undetermined values were determined 7-fold cross-validation calculation another 50 samples 0.78 10.9%.