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Volume 37 Issue 9
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YANG XU, SHENG Jin-chang, ZHENG Zhong-wei, SUN Yong-jun, YANG Hui, ZHAN Mei-li, GU Yang. Experimental study on seepage properties of GCL with different overlap methods[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(9): 1668-1673. DOI: 10.11779/CJGE201509014
Citation: YANG XU, SHENG Jin-chang, ZHENG Zhong-wei, SUN Yong-jun, YANG Hui, ZHAN Mei-li, GU Yang. Experimental study on seepage properties of GCL with different overlap methods[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(9): 1668-1673. DOI: 10.11779/CJGE201509014
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Experimental study on seepage properties of GCL with different overlap methods

  • 1. College of Water Conservancy and Hydropower, Hohai University, Nanjing 210098, China; 2. Tianjin Hydraulic Research Institute, Tianjin 300061, China; 3. Huzhou Wuxing Drainage Station, Huzhou 313000, China; 4. School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031, China

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  • Received Date: November 03, 2014
  • Published Date: September 17, 2015
    Graphical Abstract
    • Abstract
  • For a thorough research on the GCL overlap anti-seepage problem in terms of seepage flux and seepage stability, an overlap seepage physical test method for the simulation of GCL installation process is established by developing an interface seepage experimental apparatus consisting of pressure control system and model test system under normal stress. The optimization of anti-seepage of the overlap bentonite is preliminarily discussed according to the tests under different conditions. The results show that the GCL overlap width should be more than 30 cm. The amount of bentonite added on the overlap should not be less than 4000 g/m2, preferably between 4000~5000 g/m2. GCL model specification 5000 g/m2 is able to meet the requirements of impervious body. The magnitude of confining pressure and the load path both have great impact on the permeability of the overlap. The overlap remains dense and firm and its permeability changes a little if the confining pressure first increases and then decreases.
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    • References (14)
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