The Effect of the Core Shapes on the Transmissivity of Geosynthetics Horizontal Drains

Abstract

This paper describes that the effect of core shape on the transmissivity of Geo synthetics Horizontal drains (GHDs) based on transmissivity test results. The transmissivity test was carried out to evaluate several stress levels. The single-layered net core (SL), the double-layered net core (DL), the emboss-shaped core (EB) and the non-woven geotextile (NW) were tested.
At lower stress level, DL showed the largest transmissivity. At higher stress level, however, EB showed the largest transmissivity. The reduction of transmissivity of DL and EB were more than 85% and 30% respectively. The largest reduction of transmissivity for DL was considered that the applied higher stress cause a larger flow sectional contraction for DL than EB.