Experimental evaluation of reinforcement in geogrid-soil structure

Geogrids are usually inserted horizontally in geogrid-soil structure. A potential sliding surface, however, intersects geogrid at an angle which varies with the position of geogrid. There are satisfactory ways of investigating the interaction between the soils and geogrids in the current routine test techniques. A new prototype shear apparatus has been developed for this purpose. The shear surface is inclined and the geogrid is inserted horizontally, in which the tensile force can keep a constant level in this apparatus. The tests were carried out to evaluate the influence of the tensile force of the geogrids on the effects of soil reinforcement. The test results were compared with the idea of the mechanism in the current design method.