Experimental study on friction and bearing capacity of caisson type pile under considering ground reinforcement

Many efforts have been done for introducing the ground friction to the design of caisson type pile foundation under condition of large-sized. Ground reinforcing type foundation which has rigid steel bars for reinforcement of the surrounding ground is very effective for increasing of friction under using contact concrete support. It has developed in order to cut down the cost of the foundation for transmission tower or road bridge foundations, these are determined by uplift or horizontal bearing capacity. In this study, the authors investigate the reinforcement effects for vertical bearing capacity of reinforced and un-reinforced foundations under consideration of experimental viewpoint. The outdoor actual size vertical loading tests show the character of friction and the mechanical effect of the reinforcement. The evaluation method which is proposed on facts of experiment and analysis is appropriately demonstrated.