抄録
This paper presents an experimental program to investigate the effect of radial strain on the friction capacity of an instrumented model pipe pile. The model was buried in a dry INAGI sand. Loads were then applied in four different ways with and without applied surcharge pressures, one compression (push-down) and three tensions (pull-out). The first pull-out load was applied at the top of the model, the second was applied at the tip and the last was applied at the tip for an axially prestressed condition. The use of these different types of loading had a significant effect on the friction capacity, that is, the friction capacity decreases in the following order; push-down, pull-out under prestress, pull-out at the tip and pull-out at the top. These decreases were interpreted to be the results of radial strain and due to the differences in arching in the sand.
