2008 Volume 3 Issue 1 Pages 55-71
The ground reinforcing type foundation, which is a caisson type pile foundation with steel reinforced bars around the pile, was recently developed with the aim of increasing the bearing capacity of the caisson type pile foundation. Compared to current popular foundation, the ground reinforcing type foundation can reduce the construction cost dramatically because of the smaller in size of caisson. This research is focusing on the effect of inclination of reinforcements on the horizontal capacity of the ground reinforcing type foundation. For that purpose, the horizontal loading tests in the centrifugal acceleration were then conducted. Testing results showed that the horizontal capacity of foundation that placing the reinforcement in the diagonal direction is higher than that of the foundation placing the horizontal reinforcement. Testing results showed that the horizontal capacity of foundation that placing the reinforcement in the diagonal direction is higher than that of the foundation placing the horizontal reinforcement because normal force can act on the reinforcements effectively. Finally, a new design method for the ground reinforcing type foundation was then developed by using beam-spring model. This method can be used to evaluate the effect of inclination to the horizontal capacity and the model results agreed well with the testing results.
