Abstract
Micro pile foundation is applicable as a measure such as a rock fall barrier to stabilize slopes. Combination piles as a set of micro piles normally driven into the ground that is an inferior condition such as a slope of talus cone at cold regions; an excessive displacement of the foundation is highly likely due to the pressure of snowfall. However, the behavior of a foundation with combination piles on such ground is not sufficiently clear. In this report, we proposed an analytic model for the structure of foundation composed of a vertical pile, a slant pile and a footing, and applied this analytic model to relationships of road and displacement it got from a result of experiments, and verified that validity. Furthermore, we discussed the relationship of load and deformation characteristic, as obtained from analytic results concerning combination piles applied as a foundation of the rock fall barrier on the slope of talus cone, we showed examples of the application to the design for the combination micro piles loaded by accumulated snowfall.
