Abstract
This paper describes about masonry technology of stone wall of Osaka Castle of Tokugawa period through the investigation on historical and empirical study. Firstly two collapse cases of stone wall, picking out through historical and literal and geotechnical study, were made clealy. And then, empirical and geotechnical approaches regarding on rationalism mechanics of masonry technology of stone wall were presented in the view point of shape of plane and cross section of stone wall. Moreover, in order to estimate the stability of stone wall structure, new engineering indexes, such as ratio of stone wall structure and deformation factor, were proposed.
