砂質土で沈下を低減する車輪形状に関する実験的研究

概要

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Tread profile of wheel traveling on loose sandy soil was examined for providing good trafficability. Concave tread was proposed to reduce sinkage as the shape that lessens sand flow from underneath of the wheel to its side. In order to verify the shape effect of wheels, model blocks with several shapes were compressed to flattened sand surface and their penetration resistance was measured. In the results of the test, the block with concave shape showed higher resistance than flat or convex shape, which indicates that concave shape tread excels in the bearing capacity on sand. Experiment of wheel run on flatten loose sand surface was also conducted. Test run of the wheels with different shapes showed that concave tread has sufficient effect to reduce sinkage, slip ratio, and driving torque.