Abstract
This paper describes the topographical and geological observations, degree of weathering and laboratory tests on the weathered granites in the two sites of Japan, one in Hiroshima, and other in Abukuma. The weathered granites in both sites were clearly classified into DL, DM and DH according to the rock classification of Honshu-Shikoku Bridge Authority and the stress-strain behavior of the weathered granites were controlled by the soil structure influenced in the particle crushing. The paper also discusses the comparisons of the mechanical characteristics to simulate the stress-strain behavior of the weathered granites with elasto-plastic soil model, tij-sand model. The simulations show the good agreement until the peak strength for the both case. The results make it clear that the influence of the local conditions such as rockforming minerals and weathering environment are important to the mechanical characteristics on the weathered granites.
