ISSN 2096-4498
CN 44-1745/U
Tunnel Construction ›› 2017, Vol. 37 ›› Issue (4): 462-468.DOI: 10.3973/j.issn.1672-741X.2017.04.012
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XIE Youhui, GUAN Huisheng*
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Abstract:
The model of mathematical relationship between water and soil pressure on shield and gradient of slope is established; the mathematical relationship between shield thrusting resistance and slope gradient is deduced; the shield thrusting resistance when boring horizontally and downhill by 6° are calculated; and the curves of relationship between shield thrusting resistance and slope gradient are described by software MATLAB, by taking shieldbored inclined shaft of Xinjie Mine in Inner Mongolia for example. The results show that: 1) Compared to boring horizontally, the total thrusting resistance of shield when boring downhill by 6° is 8% smaller. The total thrusting resistance of shield when boring downhill by 6° nearly equals to that subtracting component of gravity along axial line from total thrusting resistance of shield boring horizontally when the gradient is less than 13°. 2) The total shield thrusting resistance decreases with the gradient increase. 3) The shield will slide downhill when the gradient is larger than 50.4°; as a result, the cutters on cutterhead would be invaded into excavation face which would induce hard torque start and cutter replacement.
Key words: shield, boring downhill, gradient, thrusting resistance
CLC Number:
U 45
XIE Youhui, GUAN Huisheng. Research on Influence of Shield Boring Downhill on Thrusting Resistance[J]. Tunnel Construction, 2017, 37(4): 462-468.
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http://www.suidaojs.com/EN/Y2017/V37/I4/462
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