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| Analysis of Cutterhead Torque Calculation and Its Influence Factors for Slurry Balance Shield |
| YANG Zhi - yong1，CHENG Xue - wu2，JIANG Yu - sheng1 |
| (1. China University of Mining and Technology ( Beijing)， Beijing 100083， China; 2. Underground Diameter Line Project Construction Headquarters，Beijing Railway Bureau，Beijing 100055，China) |
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Abstract Research purposes: Cutterhead torque of slurry balance shield is a key parameter in shield design. In order to the accurate calculation of slurry balanced cutterhead torque value，combing with the characteristics of the shield，this paper derived the cutterhead torque calculation formula for slurry balance shield，verified the correctness of the formula by cutterhead torque measured value of diameter line projects in Tianjin and Beijing，and analyzed cutterhead torque composition and main influence factors. Research conclusions:(1) Cutterhead positive friction torque，back torque and lateral friction resistance torque are the three important parts of total tor(que，they have at least 90% of total torque，and among which，positive friction torque has up to 60% of total torque. (2) When cutterhead opening rate increases 10%，cutterhead torque decreases about 5%. (3) When slurry pressure increases 10%， cutterhead tor(que increases about 8 %. (4) Cutterhead torque increases with the increasing of cutterhead diameters， and torque augmentation increases with the increasing of cutterhead diameters. (5) Cutterhead torque increases with the increasing of frictional coefficient between cutterhead and soil，they have good correlation. (6) Thi research result can be used in slurry balance shield torcque prediction and control measures.
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Received: 14 December 2015
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2016, Vol. 33 
