Rapid Impact Compaction is a new construction technology that uses rapid impact compactor for compaction. This technology can adjust the compaction energy according to the actual needs, and has good mobility, especially suitable for compaction operation in the case of narrow working face.

At present, many domestic highways and railways have applied this technology to the compaction construction of subgrade joints such as three back backfilling, which fills the gap between the original surface compaction technology and dynamic compaction technology. The basic working process of the Rapid Impact Compaction is to tamp the working surface through the falling of the rammer under the action of gravity and hydraulic pressure. At the same time, the rammer rapidly and repeatedly rises and falls under the action of the hydraulic device. The Rapid Impact Compaction can quickly change the tamping position through the traction of the loader or the supporting device of the excavator. It can flexibly and flexibly compact the subgrade joints such as the three back backfill, so as to improve the overall construction quality of the subgrade, It can effectively reduce the post construction settlement of the joint and make up for the quality defect that large compaction machinery cannot compact in place.

From the above, Rapid Impact Compactor is very suitable for subgrade treatment, so why should subgrade be compacted? What are the hazards of subgrade settlement? Here is a brief introduction to the hazards of subgrade settlement for your reference.

Hazards of subgrade settlement

1. Reduce the service life of subgrade and pavement

Under the long-term self weight and load, the subgrade and pavement often creep. In fact, its own creep speed is slow, so it will not affect the quality of the road part. But as for the whole subgrade and pavement, the most important part is the connection between the bridge and the road. Due to the influence of the difference in stiffness, the bridge part will not creep. Therefore, the originally flat pavement will have differential settlement, With the continuous occurrence of differential settlement, when the vehicle is driving in this area, it is very easy to bump. Under the long-term impact of dynamic load on the original pavement, this phenomenon of differential settlement will gradually become serious, thus shortening the service life of the subgrade and pavement.

2. Increase the probability of traffic accidents

Vehicle bumping is particularly common in road transportation, which mainly occurs in the settlement section of subgrade and pavement. The running speed of expressway vehicles is fast, and even the very small settlement difference is easy to cause traffic accidents. According to the analysis of a large number of cases, if the settlement difference between the bridge and the road contact surface exceeds 15 mm, the vehicle will have a relatively obvious jumping phenomenon during driving. At this time, the normal operation of vehicles will be affected, and the probability of traffic accidents will reach 60% or even higher.

In a word, subgrade settlement not only damages the life of the highway, but also poses a threat to traffic safety. Using Rapid Impact Compactors to treat subgrade has the advantages of long acting time of tamping force and small peak force, making the subgrade compactness more uniform and deeper, effectively ensuring the implementation effect of the project, which can be popularized in similar projects.