ISSN 2096-4498
CN 44-1745/U
Tunnel Construction ›› 2012, Vol. 32 ›› Issue (4): 474-478.DOI: 10.3973/j.issn.1672-741X.2012.04.008
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HENG Bo, WANG Jianyu, WU Jian
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Abstract: The water pressure on the tunnel lining is one of the key parameters of tunnel structure design. The waterprooftype lining bears hydrostatic pressure. However, the drainagetype lining usually partially responds to the hydrostatic pressure. The hydrostatic pressure exerted on the lining should be reduced. The water pressure reduction coefficient of the lining under the conditions of axial symmetry is deduced, and its reliability is verified by means of numerical method, on basis of waterseepage theory. The calculation results show: 1) The water inflow decreases as the lining permeability reduces. When the value of kl/ks is 0.001, there is almost no water inflow and the water pressure reduction coefficient is nearly equal to 1. 2) There is a public intersection between the water inflow and the water pressure reduction coefficient for different values of kl/ks, and the range of kl/ks is from 0.02 to 0.03, meanwhile, the water pressure reduction coefficient is about 0.5. 3) The water inflow can be effectively stopped by means of grouting. 4) The calculation results are reliable and effective.
Key words: underwater tunnel, tunnel lining, water pressure, water inflow, reduction coefficient
HENG Bo, WANG Jianyu, WU Jian. Calculation of Reduction Coefficient of Water Pressure on Underwater Tunnel Lining[J]. Tunnel Construction, 2012, 32(4): 474-478.
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http://www.suidaojs.com/EN/Y2012/V32/I4/474
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