sheep - foot roller

A sheep - foot roller is a static compaction machine. It has evenly distributed and staggered sheep - foot - shaped protrusions welded on the surface of the roller. It belongs to a kind of non - smooth roller. The sheep - foot - shaped protrusions are higher than those of the pad - foot roller, but their end - face area is smaller than that of the pad - foot roller. When working, the weight of the roller acts on the bedding layer through a row of grounded sheep - feet. Due to the small end - face area of the sheep - feet, the pressure is high, so the soil directly under the end - face of the sheep - feet is subjected to a large positive pressure. At the same time, the sheep - feet will also exert a lateral pressure on the soil during the insertion and extraction process, forming a rubbing action on the soil, which can achieve a better compaction effect. Sheep - foot rollers are mainly used for the compaction of earth embankments and subgrades. They are suitable for compacting cohesive soils and can obtain highly dense soil masses. They also have a crushing effect on the filled soil materials containing hard - to - break soil lumps. However, for non - cohesive soil materials, excessive positive pressure and lateral pressure are likely to cause the loosening of the soil layer, making it difficult to compact.