Abstract:
During recent decades, ground improvements using waste materials have been encouraged in many countries as
a cost effective way. This paper discusses application of coir wastes in vertical drains as a substitution material
to sand.
The permeability behaviours of the combined material of sea sand and coir waste were studied and they
were sufficient for vertical drains. The inclusion of vertical drains in the soft clay was physically modeled and
the drains were filled by the mixed material. This study showed that consolidation rate of soft clay increased
largely with the vertical drains. Finally, an optimum coir percentage was proposed.
