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WANG Jun, LIU Fei-yu, WANG Pan, GENG Xue-yu. Cyclic shear dynamic properties of geotextile-sandy soil interfaces[J]. Journal of Traffic and Transportation Engineering, 2016, 16(6): 12-20.
Citation: WANG Jun, LIU Fei-yu, WANG Pan, GENG Xue-yu. Cyclic shear dynamic properties of geotextile-sandy soil interfaces[J]. Journal of Traffic and Transportation Engineering, 2016, 16(6): 12-20.
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Cyclic shear dynamic properties of geotextile-sandy soil interfaces

  • 1.

    College of Civil Engineering and Architecture, Wenzhou University, Wenzhou 325035, Zhejiang, China

  • 2.

    The Key Laboratory of Engineering and Technology for Soft Soil Foundation and Tideland Reclamation of Zhejiang Province, Wenzhou University, Wenzhou 325035, Zhejiang, China

  • 3.

    Collaborative Innovation Center of Tideland Reclamation and Ecological Protection, Wenzhou University, Wenzhou 325035, China

  • 4.

    Department of Civil Engineering, Shanghai University, Shanghai 200072, China

  • 5.

    School of Engineering, University of Warwick, Coventry UV4 7AL, Warwick, UK

More Information
  • Author Bio:

    WANG Jun(1980-), male, professor, PhD, +86-577-86689687, sunnystar1980@163.com

  • Received Date: 2016-08-25
  • Publish Date: 2016-12-25
    Abstract
  • A series of cyclic direct shear tests of soil-reinforcement interfaces were performed by using a large-scale direct shear device.Woven geotextile and nonwoven geotextile were used as reinforcement materials.Chinese ISO standard sand was used as soil mass.When the vertical stresses are 30, 60 and 90kPa respectively, the cyclic shear displacement amplitudes are 1, 3and5 mm respectively, and the sandy soil densities are 22%, 52% and 75% respectively, theirinfluences on the cyclic shear properties of soil-reinforcement interfaces were studied, and the development laws of peak shear stresses and the relationships of shear stresses and shear displacements in the processes of cyclic shear tests on two kinds of geotextile-sandy soil interfaces were analyzed.Study result indicates that the cyclic shear softening phenomena appear on woven/nonwoven geotextile-sand interfaces, and the softening laws are different.When the vertical stress increases from 30 kPa to 90 kPa, the peak shear stress of woven geotextile-sandy soil interface increases by 72.9%, and the peak shear stress of nonwoven geotextile-sand interface increases by 167.5%, so the influence of vertical stress on the cyclic shear properties of geotextile-sandy soil interface is obvious.When the shear displacement amplitudes are 1, 3and5 mm respectively, the peak shear stresses of woven geotextile-sandy soil interface are 25.9, 27.9and 29.8kPa respectively, and the peak shear stresses of nonwoven geotextile-sandy soil interface are 21.8, 23.8and 22.6kPa respectively, which shows that the peak shear stress of woven geotextile-sandy soil interface increases with the increase of shear displacement amplitude, while the peak shear stress of nonwoven geotextile-sandy soil interface firstly increases and then decreases.Under the three sandy soil densities, the differences among the peak shear stresses of woven geotextile-sandy soil interface do not exceed 2kPa, and the differences among the peak shear stresses of nonwoven geotextile-sandy soil interface do not exceed 3kPa, which shows that the sandy soil density has no significant influence on the cyclic shear properties of woven/nonwoven geotextile-sandy soil interfaces.

     

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