ABSTRACT
CSG, Cemented Sand and Gravel, is a material made by adding cement and water to rock-like material such as riverbed gravel or excavation muck that can be obtained easily near dam sites, and mixing it briefly with simple device. The strength of CSG is relatively not strong and the fluctuation of its physical property is large compared with concrete. On the other hand, because the stress occurred in a trapezoid-shaped dam with gentle slope is small, the required strength of its material can be low. It is, therefore, possible to use the CSG as a construction material for the trapezoid-shaped dam. Authors have advocated the trapezoid-shaped CSG Dam as the new type of dam that combines both characteristics of a trapezoid-shaped dam and CSG. The trapezoid-shaped CSG dam achieves three rationalizations at the same time: the rationalization of design, of execution, and of materials.
In this paper, basic characteristic of a trapezoid-shaped dam is clarified by stress analyses using a dynamic Finite Element Method (FEM). And Considering the results of stress analyses, the basic design concept of a trapezoid-shaped CSG dam is described.
