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Volume 36 Issue 6
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LI Zong-li, PEI Xiang-hui, LÜ Cong-cong, ZHANG Guo-hui. Reasonable permeability coefficient and engineering measures of concrete lining circle[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(6): 1167-1172. DOI: 10.11779/CJGE201406024
Citation: LI Zong-li, PEI Xiang-hui, LÜ Cong-cong, ZHANG Guo-hui. Reasonable permeability coefficient and engineering measures of concrete lining circle[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(6): 1167-1172. DOI: 10.11779/CJGE201406024
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Reasonable permeability coefficient and engineering measures of concrete lining circle

  • 1. College of Water Conservancy and Architecture Engineering, Northwest A&F University, Yangling 712100, China; 2. North China Water Survey and Design Research Institute Co., Ltd., Tianjing 300222, China

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  • Received Date: September 15, 2013
  • Published Date: June 19, 2014
    Graphical Abstract
    • Abstract
  • The analytical results of seepage fields and the elasto-plastic solutions considering seepage force are adopted to study the feasibility of permeable concrete lining and its reasonable permeability coefficient. The influence laws of seepage field, flow discharge, plastic zone, displacement and rock pressure are analyzed under different permeability coefficient ratios of lining to surrounding rock of free flow pressure tunnel running in a practical project. The results show that the pore water pressure, plastic zone, displacement at the edge of the plastic zone and rock pressure are the maximum when the lining circle is impermeable concrete material. But those values rapidly decrease when the permeability of lining slightly increases, and tend to be constant values with the increase of permeability coefficient ratios of lining circle to surrounding rock. The method of permeable concrete lining in free flow pressure tunnel is feasible, and the reasonable permeability coefficient ratio of lining and surrounding rock is equal to or larger than 1.0. The permeable concrete lining circle structure is proposed for solving the problems of limited flow discharge required by the surrounding water environment and durability of reinforced concrete lining. The design measures are also discussed.
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    • References (14)
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