Abstract
Recent development of new geosynthetics such as composite fabrics has enabled the construction of steep earth fill using such as Kanto loam and/or construction by-products which have never been used as fill materials. Composite fabrics have almost the same tensile strength of geogrids also have the same drainage effect. The aim of this papar is to offer a fundamental data in order to develop a new design method of steep reinforced earthfill considering both reinforce and drainage effects. Therefore, comparison tests of model embankments have been carried out. This papar deals with two series of steep earth fill model test. One is earth fill reinforced with three kinds of geosynthetics, i. e; composite fabric (both reinforce and drainage effects), geogrid (reinforce effect only), and nonwoven fabric (drainage effect only). The step loadings were appried at the top of the fill after 53day's consolidation. Another is earth fill reinforced with composite fabric varying two laying pitches and no reinforced earth fill. The step loadings were appried after 4day's consolidation. Some useful findings have been withdrawn from the test results.
