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Transformation of Load Transfer Soil Arch in Geosynthetics-Reinforced Piled Embankment: A Numerical Approach

성토지지말뚝공법의 아치형 응력전달구조 변화에 대한 수치해석적 분석

  • Received : 2016.03.22
  • Accepted : 2016.05.24
  • Published : 2016.06.30

Abstract

In the geosynthetics-reinforced piled embankment the effects of soft soil stiffness, friction angle of the fill material, tensile stiffness of geosynthetics, and height of the embankment on the load transfer soil arch measured by the critical height were numerically investigated. Results from parametric studies show that the magnitude of the soft soil stiffness is the most influencing factor on the critical height. The contour charts of the critical height with respect to the combination of the soft soil stiffness and other parameters were presented. The charts show that the critical height sensitively varies with the combination of the soft soil stiffness and the height of embankment. Under the sufficiently low stiffness of soft soil, the critical height sensitively varies with the friction angle of the fill material. Once the geosynthetic layer is placed, however, the magnitude of the tensile stiffness of the geosynthetic layer hardly influences the critical height of the soil arch.

Keywords

Piled embankment;Critical height;Soft soil stiffness;Geosynthetics;Soil arching effect

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Acknowledgement

Supported by : 국토교통부