2D AND 3D ANALYSIS OF GEOSYTHETIC REINFORCED LOAD TRANSFER PLATFORM FILLS BUILT ON RIGID COLUMNS (In Turkish)


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Berilgen M. M. , Edil T., Özaydin I. K.

Third National Conference on Geosynthetics, İstanbul, Turkey, 13 - 14 November 2008, pp.155-166

  • Publication Type: Conference Paper / Full Text
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.155-166

Abstract

Use of column-supported embankments for construction over soft ground is increasing due to the increasing demands for accelerated construction.  Furthermore, such an approach results typically in a more reliable solution in terms of controlling settlements.  To minimize differential settlement between the support columns and the ground between them, a geosynthetic-reinforced load transfer platform (GRLTP) is typically placed at the base of the embankment.  Most numerical analyses of such platforms have been two-dimensional (plane strain) with some adjustments, e.g., reducing column rigidity proportional to column spacing.  The column-GRLTP system is numerically modeled using the 3-dimensional version of PLAXIS, a widely used numerical analysis code, for different column lengths, spacings, and rigidities for a set of typical soft ground parameters.  The calculated arching ratios are compared with those from the 2-dimensional modeling using the same parameters and with those reported in the literature. A higher arching ratio is obtained from the 3-dimensional analysis compared to 2-dimensional analysis even after making an adjustment by reducing column rigidity in the latter.