Akademik Veri Yönetim Sistemi
Third National Conference on Geosynthetics, İstanbul, Türkiye, 13 - 14 Kasım 2008, ss.155-166
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.