An application of performance-based design concept to design of compacted ground

In order to estimate the risks of structural design, mechanical behaviour of the structures should be predicted by rational methods with accuracy. However, in the case of compacted ground, it is difficult to estimate the mechanical behaviour because it is usually in an unsaturated state. Therefore empirical methods have been used in practice. Although the validity of such methods has been confirmed, the relationship between compaction control standard and the mechanical behaviour has not been examined sufficiently. In this paper the authors discuss these relations and evaluation methods by using water content and dry density that are usually used in practice.