A STUDY ON THE DEFORMATION BEHAVIOR OF LABORATORY GEOSYNTHETICS REINFORCED SOIL WALLS

摘要

Direct shear tests, wide-width tensile tests, and laboratory geosynthetics reinforced soil (GRS) wall tests were performed to examine and understand the external deformation behavior characteristics of GRS walls respectively constructed with non-woven geotextile (NWGT) and geogrid as reinforcement material. The result of laboratory GRS walls tests showed that the external displacement of the wall with geogrid, which had more stiffness than NWGT,appeared to be smaller than the wall with NWGT during both under construction and in the beginning of the loading,but the wall with geogrid showed larger displacements than the wall with NWGT as the load is increasing. The interface shear stress at the initial shear strain appeared to be higher at the soil-geogrid interface than at the soil-NWGT interface,but quite different phenomena in interface shear stress with increasing shear strain. It could be concluded that the NWGT would be a reasonable reinforcement of the wall under limited allowable deformations.