TRACTIVE PERFORMANCE AND COMPACTION EFFECT OF A ROAD ROLLER RUNNING ON A WEAK SANDY SOIL

This study aims to investigate the tractive performance of a two-axle, two-wheel vehicle with rear-wheel drive or brake and the compaction o f a decomposed granite soil. The effects of traction or braking, the c hange of sinkage, the slip ratio of the front and rear roller, and the number of passes of the road roller were studied. A number of tests w ere conducted and the experimental data were compared with the theoret ical analysis results. It was observed that the amount of sinkage on t he front and rear roller took the minimum value when the front roller was in the unpowered rolling state and the slip ratio of the rear roll er was almost zero. When the absolute value of the slip ratio of rear roller increased, the amount of sinkage on the front and rear rollers, the absolute value of the driven or braking force of the rear roller and the absolute value of effective tractive or braking effort of the road roller increased. When the front roller was in the unpowered roll ing state and the rear roller was in the braking state at -5% skid, th e compaction density of the soil was at a maximum. Copyright (C) 1996 ISTVS.