What Factors Affect the Price of a Compactor?

In some engineering constructions. Such as the filling of subgrades and dams and backfilling of construction sites. Soil is often used as a building material. ± body due to excavation, handling and filling. The original structure and state have changed, such as without manual compaction. The void ratio is often large, and the compressibility is high, and the shear strength is low, which is difficult to meet the needs of the project. In order to reduce the post-construction settlement of the fill and increase the strength, it must be compacted by rolling, tamping or vibration in accordance with certain standards in the project. The compaction effect of soil is not only related to the compaction method, but also closely related to the type, gradation, compaction function and moisture content of the soil. ^[1]

Earthwork compaction ^[2]

Filling and compaction methods generally include roller compaction, compaction and vibration compaction. ^[3]

The quality of backfill compaction is related to many factors, among which the main influencing factors are compaction work, soil water content and thickness of each layer of soil.

When the moisture content of soil is small, its dry density increases as the moisture content increases, and when the dry density reaches a certain value, the continuous increase of the moisture content causes the dry density to decrease. The peak value of dry density is called the maximum dry density _{dmax at} this number of strokes. The moisture content corresponding to the maximum dry density is called the optimal moisture content. It is called w _op. Under certain compaction function, the best compaction effect can be obtained only under the optimal moisture content. When the moisture content of clayey soil is low. The water film on the surface of the soil particles is thin, and the water mainly exists in the form of strongly bound water, and the friction and cohesion between the particles are large. Relative movement is difficult and therefore difficult to compact. As the water content increases, the water film becomes thicker, the friction and cohesion between the particles decreases, and mutual movement becomes relatively easy, so the dry density after compaction increases. When the moisture content of the soil exceeds the optimal moisture content, if the moisture content is further increased, since the gas in the soil exists in the form of closed bubbles in the soil, it is difficult to discharge the bubbles when it is hit, increasing the elasticity of the soil and reducing the compaction. effect.