Effect of Tunneling Parameters on Mucking Performance
of Tunnel Boring Machine Cutterhead in PumpedStorage Power Station Inclined Shaft

doi:10.3973/j.issn.2096-4498.2022.S2.005

Tunnel Construction ›› 2022, Vol. 42 ›› Issue (S2): 29-35.DOI: 10.3973/j.issn.2096-4498.2022.S2.005

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Effect of Tunneling Parameters on Mucking Performance of Tunnel Boring Machine Cutterhead in PumpedStorage Power Station Inclined Shaft

TANG Jianguo1, PENG Zhengyang2, ZHANG Xiangfu1, REN Xin1, YUE Jinwen1, ZHOU Fangjian

(1. Hunan Pingjiang Pumped Storage Corporation Limited, Yueyang 414000, Hunan, China; 2. China Railway Construction Heavy Industry Corporation Limited, Changsha 410100, Hunan, China)

Online:2022-12-30 Published:2023-03-22

Abstract

Abstract: To investigate the effect of tunneling parameters on mucking efficiency of tunnel boring machine(TBM) in the construction of a pumpedstorage power station inclined shaft, a numerical calculation model of mucking of cutterheads with two different diameters is established. The effect of different advancing speed and rotation speed of cutterhead on the mucking efficiency and rate of the cutterhead is analyzed. The simulation results reveal the following: (1) The mucking efficiency of the largediameter cutterhead is larger than that of the smalldiameter one. With an increase in advancing speed, the smalldiameter cutterhead shows a better mucking performance than the largediameter one, and the mucking efficiency can reach 80.02%. (2) The mucking efficiency and rate of both cutterheads increase first and then decrease with increasing rotation speed of cutterhead. The largeand smalldiameter cutterheads achieve the maximum mucking efficiency of 74.34% and 79.82% at rotation speed of 6 and 7 r/min, respectively. (3) Compared with the advancing speed, the rotation speed of cutterhead has a greater effect on the mucking performance. The mucking efficiency and rate would sharply decrease when the rotation speed of cutterhead is too high. Therefore, in the construction of pumpedstorage power station inclined shaft with TBM, reasonable operational parameters should be arranged to achieve efficient mucking of cutterhead.

Key words: tunnel boring machine, cutterhead, inclined shaft, tunneling parameters, mucking efficiency

TANG Jianguo, PENG Zhengyang, ZHANG Xiangfu, REN Xin, YUE Jinwen, ZHOU Fangjian. Effect of Tunneling Parameters on Mucking Performance of Tunnel Boring Machine Cutterhead in PumpedStorage Power Station Inclined Shaft[J]. Tunnel Construction, 2022, 42(S2): 29-35.

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Effect of Tunneling Parameters on Mucking Performance of Tunnel Boring Machine Cutterhead in PumpedStorage Power Station Inclined Shaft

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