We mentioned in the article "When will the roadbed be impacted and compacted? Meihua roller manufacturers discuss layered compaction of stone filled embankments" that the impact compaction construction of stone filled embankments does not always use impact rollers, and vibration rollers are also needed. So, why do we still use vibration rollers? What is the purpose of using a vibrating roller?
The leveling of the site is beneficial for increasing the speed of impact roller compaction construction. We know that the compaction speed has a certain amplification effect on the impact roller compaction construction. Within the operating speed range of 10-15 kilometers/hour, the higher the compaction speed of the impact roller, the better the impact compaction effect.
Moreover, the rolling speed is also one of the important factors determining the productivity of the impact roller area. Using a vibrating roller to simply level and compact can improve the rolling effect and construction efficiency of the impact roller.
First, use a vibrating roller to compact the foundation to a certain degree of compactness, which can improve the compaction effect and construction efficiency of the impact roller. Although the compaction force of the impact roller is great, encountering a foundation that is too soft is like a strong man hitting a pile of cotton with one punch, unable to exert force.
A foundation with a certain degree of density is more conducive to the impact compaction construction of impact rollers. It is not only conducive to the acceleration of the impact roller, but also more conducive to the transmission of the huge impact force of the impact roller to the lower layer of the foundation. The penetration force of the impact roller is extremely strong, similar to the propagation of seismic waves to the deep layer of the foundation, which can improve the consolidation speed of the foundation material, especially the deep layer of the foundation material.
Therefore, some engineering sections with high construction requirements use the "detection enhanced compaction" construction process of impact rollers. That is to say, not only is the vibration roller used for compaction construction, but also after the foundation is compacted by the vibration roller and meets the standard, the impact roller is used for impact rolling and reinforcement compaction to fully utilize the high-energy and efficient construction effect of the impact roller.
More importantly, the enormous impact force of impact rollers also has a certain degree of destructiveness, with a certain "crushing" effect. When using impact rollers to compact and compact the construction, the surface layer of the roadbed is about 300mm, which is often prone to poor compaction due to excessive deformation. Therefore, the foundation impact compaction and the final finishing work of the surface layer still need to be compacted using a vibrating roller.
Why use a vibrating roller for impact compaction construction? What is the purpose of using a vibrating roller? Do you understand?
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