1. Calculation model for rock disc cutting forces of TBM.
- Author
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LIU Quang-sheng, SHI Kai, ZHU Yuan-guang, and HUANG Xing
- Subjects
- *
ROCKS , *ROCK excavation , *CUTTING machines , *QUANTUM tunneling , *CUTTING (Materials) - Abstract
The accurate prediction of rock breaking forces of disc cutters is especially significant for the design and tunneling of TBM. Normal thrust of disc cutter plays a leading role in rock breaking through analyzing the motion of disc cutters. Calculation formulas for rock breaking forces of CCS disc cutters were derived based on the assumption of contact pressure distribution between cutter ring and rock, and the accuracy and applicability of the formulas were verified by linear cutting test data of multiple rock of different strength. Based on analysis of relative error between computed results and test data, the contact pressure distribution index was updated by means of least squares principle, and the prediction accuracy was improved. The contact pressure distribution index varies with the penetration of disc cutters according to the exponential law. Research results provide a guidance for the design and application of TBM in tunnel excavation. [ABSTRACT FROM AUTHOR]
- Published
- 2013