Abstract
In case the pavement foundation soils is dispersed in characteristics, a uniform bearing capacity cannot be expected, and the foundation itself is not suited to be used as subgrade. Accordingly, the subgrade is made up by excavating and replacing the foundation soil with sand. In that, if the reduction of the subgrade thickness is made possible, the problem of removal of surplus soil will be possibly reduced. With this objective in mind, the geo-textile was inserted into the subgrade to gain the reinforcement effect and the subsequent reduction in replacement thickness. Such a possibility was examined by conducting in-situ tests, laboratory tests and analyses of the test results. The test results reveal that the reduction in thickness is structurally difficult.
