Study on adaptability of V-shaped TBM for small curve turning radius
In this article,efforts are made to explore the V-shaped TBM main engine's structure mechanism and kinematics due to difficult operation and low driving accuracy in the driving process of small curve turning.Based on the drainage channel project of a pumped storage power station,firstly,the factors affecting the V-shaped TBM's minimum turning radius is analyzed by setting up the V-shaped TBM's turning direction model.Secondly,the design of V-shaped TBM main engine with the diameter ofφ3 530 mm is improved;the cutter head's reachable workspace in two propulsion systems is solved with the help of the Monte Carlo method.Finally,the ADAMS software is used to analyze the displacement-velocity variation relationship between the cutter head and the propulsion cylinder in the straight driving condition and the small curve turning driving condition of TBM.The re-sults show that when the TBM diameters are the same,the workspace at the cutter head center of the 6-SPS propulsion system is smaller than that of the 8-SPS propulsion system.The 6-SPS propulsion system is more efficient in the straight driving section;the 8-SPS propulsion system is more suitable for complex and varied driving conditions with small curve turning.
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