Analysis of influencing factors of TBM penetration under ″full and half sections″

doi:10.16265/j.cnki.issn1003-3033.2023.S2.0028

Abstract

Abstract:

In order to explore the variation characteristics of hard rock tunnel boring machine (TBM) penetration under different working conditions, taking the TBM excavation drainage corridor project of Jinyun Pumped Storage Power Station as an example, the construction technology of tunnel line intersection is analyzed. The force of TBM cutter is analyzed, the rock breaking model of single cutter is established, and the rock breaking process of cutter is explored by finite element analysis software. According to the actual excavation data, this paper analyzes the relationship between TBM excavation parameters and rock parameters under half-section-full-section conditions. The results show that under the condition of half-section tunneling, the penetration of TBM increases logarithmically with the increase of cutterhead thrust, and also increases logarithmically with the increase of cutterhead torque. Under the full section condition, the penetration of TBM shows an exponential function and a linear function growth trend with the increase of cutterhead thrust and cutterhead torque, respectively, and the growth rate is related to rock parameters.

Key words: half section and full section conditions, tunnel boring machine (TBM) penetration, rock parameters, tunneling parameters, regression analysis

CLC Number:

X936

XU Bingnan, ZHAO Xinhe, CHEN Liangwu, LI Kun, ZHANG Wenyan, XU Ruipeng. Analysis of influencing factors of TBM penetration under ″full and half sections″[J]. China Safety Science Journal, 2023, 33(S2): 202-208.

Figures/Tables 20

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岩性	围岩类别	σ_c/MPa	K_V
花岗岩	Ⅱ_a	73.2	0.63
石英片岩	Ⅱ_a	68.3	0.54
闪长岩	Ⅱ_a	78.5	0.64
石英片岩	Ⅱ_b	84.6	0.72
花岗岩	Ⅱ_b	87.7	0.71
闪长岩	Ⅱ_b	81.2	0.68
花岗岩	Ⅲ	56.7	0.48
石英片岩	Ⅲ	60.9	0.45
闪长岩	Ⅲ	52.4	0.41

名称	技术参数
开挖直径/mm	3 530
刀盘转速/(r·min^-1)	0~15.8
额定驱动扭矩/(kN·m)	1 035
最大脱困扭矩/(kN·m)	1 380
最大推进速度/(mm·min^-1)	100
最大推力/kN	7 850
整机总长/m	35
装机功率/kW	1 452
最小转弯半径/m	30
纵向爬坡能力/(°)	±5%
有效撑靴力/kN	25 360

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