Abstract
One of the authors has been developing a soil-cement pile that consists of a thin-wall steel pipe with soil cement. The newly developed soil-cement pile is more economical and ductile. The mechanical behavior of the soil-cement composite materials, however, has not been studied yet. Therefore, it is rather difficult to reflect the above-mentioned advantages in design. In this paper, in order to clarify the compressive strength-deformation characteristics of steel pipe-soil cement composite structure, triaxial tests on the cemented soil have been carried out. Then, an elastic model for thin steel pile and a constitutive model for the composite structure has been developed based on an elasto-plastic model with strain softening proposed by Adachi and Oka. Finally, FEM analysis of the thin-wall steel pile-soil cement has been performed. From the numerical analysis, the compressive strength-deformation characteristics of the composite
