Abstract
Fiber-reinforced earth construction methods in which geosynthetic fibers are mixed with soil particles and distributed uniformly within the soil matrix are able to strengthen the engineering properties of earth slope, embankment and foundation ground without any chemical action. Therefore it is one of useful methods to improve the unstable or poor waste geomaterials in order to preserve natural resources and conserve the national environment. However the influence of the geometrical conditions such as length, diameter and shapes and the surface textures of fibers are not yet fully confirmed and hence it is usually constructed based on the empirical design method.
In this study the reinforcement effects of length and surface frictional properties of nylon fibers mixed with pit sands are investigated using a large direct shear box testing and an unconfined compression testing and the experimental results are discussed.
