The Interface Friction and Anchor Capacity of Synthetic Georeinforcements

The soil-synthetic reinforcement interface friction and the anchor capacity of a reinforcement in different frictional soils have been studied in large scale pull-out tests [LxBxH=l,80xl,00×0,80 m3]. The tests were performed with the following reinforcements: a woven textile and grid and two drawn grids. Test soils were sand, crushed rock and light expanded clay aggregate (LECA). The mobilisation of reinforcement anchorage has been presented as a bond coef­
ficient, f P=tanq>/tancj>, where cj>g is the soil-reinforcement interface friction angle and cj> is the soil friction angle. It was ob­served that the coefficient f P’ was affected by the soil density, grain size, vertical stress and the properties of the rein­forcement. The study was performed in connection with a more comprehensive Finnish “Georeinforcements” -project.