In recent years, Rapid Impact Compaction has become a new type of compaction compaction equipment widely used in the construction of subgrade pavement engineering. Compared with traditional manual compaction and small compaction equipment, Rapid Impact Compaction has the advantages of convenient transfer, flexible and efficient, safe and environmentally friendly, good operation performance, and high compaction energy, while improving work efficiency, further reducing budget costs, and the impact on adjacent structures is much smaller than other compaction methods. In the past 30 years, hydraulic compactors have developed rapidly. At present, Rapid Impact Compaction has become an indispensable compaction equipment in subgrade pavement engineering. Versatile and suitable for a wide range of fillers. Hydraulic rammers are insensitive to the composition and moisture content of the filler and have obvious compaction effects in various environments.
1. Rapid Impact Compaction further reduces sand, removes or weakens the vertical symmetry of sand, the virtual beam combination is poor, the construction site strictly controls the overall quality of the subgrade project, reinforcement is not suitable for overpressure, overpressure is easy to cause nearby sand pressure, destroying the original structure.
2. The original pavement reinforcement effect is remarkable, and should be marketed, promoted and applied; After the subgrade engineering is filled with a 1m aspect ratio, the point rammer can be selected instead of impact rolling; After the subgrade project is filled with an 8m aspect ratio, a fully rammed pile is used instead of a hydrostatic pile.
3. In the whole process of subgrade engineering reinforcement, if part of the foundation settlement is too much, reinforcement countermeasures should be taken according to the specific situation, that is, 3 to 6 hammers are filled in the middle of the four ramming points to improve the actual effect of the overall reinforcement, and it is also conducive to the flatness of the overall excavation work surface.
4. For some excavation work surface narrow filling subgrade edges, the flexibility of Rapid Impact Compaction should be fully utilized. The fast footprint is small, further enhancing the practical effect of filling the edges of the subgrade and the chicken claw landform.
5. In the three-back reinforcement work, one side should be compacted according to the standard from both sides to the middle; Culvert backfilling must ensure that the matching layers on both sides of the hole are reinforced; Before reinforcement, offset monitoring observation points and real-time monitoring systems should be set up. If it is found that the asymmetric pressure throughout the work changes the structure, the ramming potential should be reduced. Increase the ramming frequency.
According to China's current construction technology, in the construction area of the subgrade project high fill subgrade project, the traditional design scheme handicraft is impact rolling and static pressing pile. These two kinds of mechanical equipment have problems such as mechanical equipment entering the site trouble, high cost of static pressing piles, and inconvenient management. If reasonable consolidation is not carried out, of course, the settlement of the foundation after the construction will not be prevented, resulting in the settlement of the foundation of the subgrade project. The hydraulic rammer raises the rammer to a certain aspect ratio according to the hydraulic cylinder and then releases it quickly. The rammer indirectly compacts the road surface according to the ramming board during the whole process of accelerated landing. The hydraulic ramming installation equipment is located on the boom of the ordinary small forklift, which is convenient for movement, can click or continuously compact the working surface, complete the high-frequency high-toughness compaction work, and the hazard depth is 3 meters, which fully guarantees the actual effect of compaction.
