In the present study, newly developed geosynthetic horizontal drains (abbreviated as GHDs) consisting of geosynthetic materials of which transmissivity and core strength are reliably high, were included in reinforced embankments. The basic reinforcing characteristics of GHDs were investigated with a pull-out test and direct shear test. According to the test results, GHDs can be used for the reinforcement of soft clay embankments. The slope deformation and pore water pressure of the reinforced embankment were carefully monitored and the results showed reasonably little deformation. The integrity of the reinforced embanlunents;using GHDs was maintained even throughout the heavy rainy season of 1993.
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