›› 2008, Vol. 29 ›› Issue (8): 2267-2270.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Experimental study of permeability of unsaturated remoulded clays

GAO Ling-xia1, 2, LUAN Mao-tian1, YANG Qing1, WANG Dong-ling3   

  1. 1. State Key Laboratory of Coastal and Offshore Engineering, Institute of Geotechnical Engineering, School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China; 2. School of Architecture and Civil Engineering, Dalian nationalities University, Dalian 116600, China; 3. School of Civil Engineering, Anhui Institute of Architecture & Industry, Hefei 230022, China
  • Received:2007-02-13 Online:2008-08-11 Published:2013-08-02

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Abstract: Infiltration flow in unsaturated soils often occars in engineering;and unsaturated hydraulic conductivity is one of important topics of unsaturated soils. Using the pressure-plate extractor, the soil-water characteristic curves under different compactive water contents and different compactive efforts are obtained. The corresponding saturated permeability coefficient is gotten by the variable water level method. Combined with the soil-water characteristic curves and saturated permeability coefficient, based of Van Genuchten model and Fredlund model, permeability of remoulded unsaturated clay under different compactive conditions is discussed in detail. The results show that the permeability coefficient decreases with the increase of compactive water content; and the its difference reduces with the increase of suction; and permeability coefficient can be assumed identical when the suction reaches 1 MPa. The permeability coefficient of samples compacted with standard Proctor compactive efforts and reduced Proctor compactive efforts are very similar. The value of is about 0.01 in saturated state, and increases with the suction increases. When the suction reaches 1 MPa, the value becomes 0.1 gradually.

Key words: permeability coefficient, soil-water characteristic curve, unsaturated soil, water content

CLC Number: 

  • TU 411
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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