Abstract
This paper presents a basic study on the modification control of differential settlement of a building with spread foundation by new cylindrical rubber jacks. This study is consisted of a model test, the numerical simulation and the control analysis. The water is injected into the cylindrical rubber and then it expands in the sand. The result of interaction analysis by the FEM was also compared with that of the model test. On the other hand, an optimal control analysis with the performance function was carried out. As a result, the phenomenon of jacking up by the cylindrical rubber jack could be predicted, and the applicability of the optimal control for the interaction problem could be confirmed.
