Road roller: a powerful assistant in road construction

Roller, also known as soil compactor, is an indispensable equipment in road construction and large-scale engineering projects.
It plays an important role in the filling and compaction operations of high-grade highways, railways, airport runways, dams, and sports venues due to its strong compaction ability and wide applicability.

1、 Working principle of roller

The road roller mainly relies on its own weight and vibration to compact the soil.
When the road roller is running, its wheels or rollers will apply pressure to the soil surface, gradually reducing the gaps between soil particles and increasing the compactness of the soil.
The vibration system further accelerates the compaction process through high-frequency vibration, effectively reducing the frictional force inside the soil and making the soil particles more tightly arranged.

2、 Types of rollers

According to mechanical principles, road rollers are mainly divided into two types: static rolling and vibrating.
Static rolling rollers include two wheeled smooth wheel rollers, three wheeled smooth wheel rollers, and tire rollers, which are suitable for different compaction needs.
And vibratory rollers are divided into tire driven single steel wheel vibratory rollers, double steel wheel driven rollers, and convex block vibratory rollers, etc. They compact the soil through the high-frequency impact force generated by vibration, resulting in higher construction efficiency.

3、 Key parameters of road roller

Understanding its key parameters is crucial when choosing a roller.
These parameters include:

1. Weight: The weight of a road roller is an important indicator for measuring its compaction effect, usually between 2-30 tons.
2. Vibration frequency: refers to the number of times the tire comes into contact with the ground per second, with a common range of 30-45Hz.
3. Amplitude: The maximum movement distance of the tire in the vertical direction on the ground, generally between 0.5 and 1.2 millimeters.
4. Driving speed: The driving speed of the road roller during operation can reach up to 20 kilometers per hour.
5. Road width: The maximum width that can be achieved during each road compaction, commonly ranging from 1.5 to 2.5 meters.

In addition, there are parameters such as centrifugal force, ground pressure ratio, wheel edge pressure, and diesel engine power, which have a significant impact on the compaction effect and work efficiency of the roller.

4、 Suggestions for selecting a road roller

1. Choose according to soil structure: Different types of rollers are suitable for different soil structures.
   For example, a tire driven single drum vibratory roller is suitable for compacting non cohesive materials, while a double drum vibratory roller is more suitable for compacting asphalt concrete and sand gravel mixtures.
2. Choose according to the requirements of construction efficiency: The construction efficiency of vibratory rollers is usually higher than that of static rollers. Therefore, when it is necessary to quickly complete compaction operations, vibratory rollers should be given priority consideration.
3. According to the construction process selection: In order to improve the construction quality and efficiency, a vibratory roller is usually used for initial compaction after the roadbed is laid, followed by a tire roller for intermediate compaction, and finally a smooth wheel roller for final finishing compaction.

5、 Regular maintenance and upkeep of road rollers are crucial to ensure their long-term stable operation.
This includes checking the wear of tires, the oil level and quality of the hydraulic system, the fuel supply system and ignition system of the engine, etc.At the same time, attention should be paid to avoiding excessive compaction and prolonged stay on the soil surface to prevent equipment damage or soil structure destruction.

In summary, as a powerful assistant in road construction, road rollers play a crucial role in various engineering projects.
By understanding its working principle, type, key parameters, and purchasing suggestions, we can better choose and use road rollers, and contribute our own strength to road construction.