Abstract
Drilling rigs and mobile cranes are heavy machinery used on construction sites. Overturning accidents frequently occur. Differential settlement between a set of crawlers caused to tilt so that the machineries became unstable. A position of acting load the steel plates varies when machineries propel themselves. An acting pressure through the steel plates increases the position to the edge of the steel plate and then settlement increase. Two sets of the steel plates and placed by layer to reduce the puressure. In addition, these layout should be arranged to distribute the puressure.
This study set out to determine the optimum layout of a steel plate to prevent accidents involving the overturning of large-scale construction machinery. Loading tests using a 1/10-scale model of the steel plate were performed, to investigate the decrease in the pressure acting on the bearing ground. It was found that the reduction in the pressure acting on the ground differed depending on the positioning of the steel plate.
