It is one of the most commonly used soil compactors used by builders and contractors all over the world. The sheepsfoot roller is self-propelled heavy machinery which is typically mowed and runs static. This type of roller is available in a different variety of sizes depending on the nature of the soils.
Sheepsfoot roller design.
It has almost hoof-like structures protruding from a roller to provide pinpoint pressure all across the soil. which provides a kneading action for Protruding studs on the drum is similar to a sheeps foot. The teeth size slightly different from one sheeps foot roller to another and depending on the specifications of various manufacturers. For compaction of plastic soils like silt or clay, it is very effective.
It works very well on cohesive soils. At low moisture content soil, the resulting compaction of such soils by sheepsfoot roller is probably well for other types of machinery. Sheepsfoot roller wet conditions are used frequently. The sheepsfoot roller compact from the bottom of each lift to the top.
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Sheepsfoot roller contractors used for varied soil and aggregate compactors. A sheepsfoot roller is most popular as this type of roller can compact the soil directly beneath the foot tip. Because of the high compaction speed and high pressure applied to the soils, it is very useful in the construction of both small and big dams.
- the coverage area of the ground is less. 8-12 % ground coverage under the lugs on the drum.
- Ruler pressure up to 1400 to 7000 kpa.
- normally at speeds of work Sheepsfoot roller from 6-10 km/h.
- The roller pressure on the feet may be increased by filling the drum with wet some other material or sand.
- Sheepsfoot roller Mostly used for cohesive soils such as heavy clays and silty clays except for sandy soil.
- Compaction efforts are kneading and static weight.
- The thickness of the compacting layer is kept a minimum of 50 mm(2inches) or more, which depends on the length of the foot.
Difference Types of roller
Cylindrical roller is a traditional type of roller that is relatively lightweight and, as was common throughout history, by animals such as oxen or horses, can be handled manually. It is usually made of iron, concrete and generally measures 1.5 m in length and around 1 m in diameter. The pressure cylindrical roller is typically around 7 kg/cm2.
It is also called rubber tyred rollers, tyred rollers consist of a heavily-loaded wagon with several rows of closely-spaced tyres. They provide uniform pressure throughout the width covered area, and as they are suitable for compacting uniform coarse soils and rocks, are mostly used in pavement subgrade works. Pneumatic tyred rollers are also used to finish embankments compacted by sheepsfoot rollers.
It is equipped with one or two smooth-surfaced steel wheels that send vibrations through the roller. The vibrations are generated inside the wheel by eccentric shafts rotating.
It has a cylindrical heavy steel surface comprising a network of steel bars which form a grid roller of square-shaped holes. Grid roller is common for the roller to be ballasted with concrete blocks. Grid type of roller generally provides high contact pressure but minimal kneading action, and a towed unit.
Smooth wheeled type of roller incorporates a large steel drum at the front and drums at the rear, one or two wheels.three-wheeled rollers if there are two wheels at the rear, and one wheel at the rear they are known as tandem rollers.
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