Abstract
Recently, there have been accidents in which the drill rig has toppled over. In this study, to clarify the mechanism which makes the drill rig unstable when it is self-propelled, real-scale experiment and centrifuge model tests were pereformed. The behavior of the real-scale and the model of a drill rig were measured by putting accelerometers in three places. As a result, it was understood that long periodic shakes in both real-scale and a 1/25 scale model of a drill rig occur during self-porpelling. It was clarified that the ground contact pressure that acted during self-propelled was larger than the value used to design.
