Journal of Shanghai Jiaotong University ›› 2019, Vol. 53 ›› Issue (8): 965-970.doi: 10.16183/j.cnki.jsjtu.2019.08.011

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Analysis of Tools Wear for Earth Pressure Balance Shield Based on Torque Energy of Cutterhead

RONG Xuening 1,LU Hao 2,WANG Mingyang 1,2,WEN Zhu 1,RONG Xiaoli 1,Wang Zhen 1   

  1. 1. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; 2. State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact, The Army Engineering University of PLA, Nanjing 210007, China
  • Online:2019-08-28 Published:2019-09-10

Abstract: Excessive wear of cutting tools has been reported in some earth pressure balance tunneling project in gravel and the intermediately weathered mudstone. In order to reasonably organize the changing work, the wear of the cutting tools should be predicted. Based on the operational data collected from 20 units of Chengdu Metro, the torque energy of cutterhead was chosen as the input parameter of cutter wear model. A relationship between the number of cutter changes and the torque energy was fitted. The volume of foaming liquid was then added to develop a multiple regression model, which can further improve the prediction precision of tools wear. The result shows that the number of cutter replaced increases with the increase of torque energy or the decrease of volume of foaming liquid. The relationship between the number of cutter replaced and the two input parameters is statistically significant. The number of cutter replaced for the gravel and the intermediately weathered mudstone both agree with the multiple regression model. For different soil types, different fitting parameters are observed. The multiple regression model gives more reasonable predictions than the model based on excavated length and the JTS model.

Key words: earth pressure balance shield; cutting tools; wear; operational factors; prognosis model

CLC Number: