Large scale loading tests of dangiri footings on Shirasu slope.

Construction of future express highways will be extended through the mountainous districts in Japan. Therefore, the number of foundations built on the mountain slopes will increase. Among spread foundations, footings with a stepping base, or so called “Dangiri Footing” are generally used. It is shaped like a stairway on the slope to reduce the amount of soil excavated and the area of cut slope. The authors conducted the loading tests on large scale models of Dangiri Footing, as one of the studies to establish the design procedure for the Dangiri Footing. In this paper, the test program and results are described in detail, and the simple failure mechanism and design formula to evaluate the ultimate bearing capacity are proposed.