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MODERN TUNNELLING TECHNOLOGY 2020, Vol. 57 Issue (5) :23-29    DOI:
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On Power Performances of Tunnel Construction Machinery at High-altitude Area
(1 CCCC Second Highway Engineering Co., Ltd., Xi′an 710065; 2 Key Laboratory of Transportation Tunnel Engineering, Southwest Jiaotong University, Chengdu 610031; 3 The Fourth Engineering Co., Ltd. of CCCC Second Highway Engineering, Luoyang 471013)
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Abstract In order to explore the influence of high-altitude and low-oxygen environment on the power performances of construction machinery, the construction transportation machinery is taken as the studied object, and the influence of altitude change on the power performances of construction machinery is studied by measuring the traction specific power. At the same time, traction specific power is used as a quantitative index of working efficiency of construction transportation machinery, and the regression model of altitude-working efficiency reduction coefficient of construction machinery and the regression model of altitude- consumption adjustment coefficient of construction machinery shift are established. The study results show that the higher the altitude is, the worse the power performance of machinery is. The traction specific power of construction machinery at 4 200 masl (above sea level) is 23% lower than that at 2 800 masl, and the working efficiency of machinery at 4 200 masl is 23% lower than that at 2 800masl. The higher the altitude is, the greater the consumption of machinery shift is, and the consumption of machinery shift at 4 200 masl is 24% higher than that at 2 800 masl.
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WANG Shuaishuai1
2 CHEN Guizhou2 GUO Chun2 BAI Yonghou3
KeywordsHigh-altitude tunnel   Power performance of machinery   Traction specific power   Working efficiency of machinery   Consumption of machinery shift     
Abstract: In order to explore the influence of high-altitude and low-oxygen environment on the power performances of construction machinery, the construction transportation machinery is taken as the studied object, and the influence of altitude change on the power performances of construction machinery is studied by measuring the traction specific power. At the same time, traction specific power is used as a quantitative index of working efficiency of construction transportation machinery, and the regression model of altitude-working efficiency reduction coefficient of construction machinery and the regression model of altitude- consumption adjustment coefficient of construction machinery shift are established. The study results show that the higher the altitude is, the worse the power performance of machinery is. The traction specific power of construction machinery at 4 200 masl (above sea level) is 23% lower than that at 2 800 masl, and the working efficiency of machinery at 4 200 masl is 23% lower than that at 2 800masl. The higher the altitude is, the greater the consumption of machinery shift is, and the consumption of machinery shift at 4 200 masl is 24% higher than that at 2 800 masl.
KeywordsHigh-altitude tunnel,   Power performance of machinery,   Traction specific power,   Working efficiency of machinery,   Consumption of machinery shift     
Cite this article:   
WANG Shuaishuai1, 2 CHEN Guizhou2 GUO Chun2 BAI Yonghou3 .On Power Performances of Tunnel Construction Machinery at High-altitude Area[J]  MODERN TUNNELLING TECHNOLOGY, 2020,V57(5): 23-29
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