Rapid impact compaction construction in Saudi Arabia

The video introduces the construction of HC150 rapid impact compactor in Saudi Arabia airport. 

The rapid impact compactor works under the traction of the loader (or crawler excavator). Its main components include: tamping chassis, tamping body, buffer cylinder device, bottom base, connecting plate device, hydraulic system, electric control system, etc. the hydraulic power source comes from the loader (or crawler excavator). Through the specially designed hydraulic system, the tamping body can rise and fall. According to the working requirements, the electronic control system can select different working gears of the rapid impact compactor to meet the corresponding working conditions. 

The rapid impact compactor box body plays the role of guiding and protecting the safe fall of the rammer body; The hammer body is a working device, which first acts on the buffer cylinder device, and then transmits the impact energy to the foundation to be compacted through a special grounding base. The rising, falling and moving transition of the rapid impact compactor are realized by the boom of the corresponding traction device, and the back and forth swing is realized by the rocker arm of the connected traction device.

Rapid impact compactor is similar to dynamic tamping machine. The tamping hammer is lifted to a certain height under the action of hydraulic pressure, and then under the action of gravity and hydraulic pressure, the ramming hammer is forced to fall to tamp the foundation, belonging to impact compaction machinery. The difference between the high-speed hydraulic compactor and the traditional dynamic compactor is that: the traditional dynamic compactor uses lifting equipment (special dynamic compactor lifting or crane equipped with tripod, gantry, etc.) to repeatedly lift the 8-40t ram to a height of 8-25m, and then uses automatic decoupling to release the load or the hammer to fall automatically, giving the foundation a strong impact energy; The rapid impact compactor uses hydraulic pressure to lift the tamping hammer to a height of 0.8-1.2m, then falls under the dual action of hydraulic pressure and gravity to tamp the foundation, and realizes rapid up and down reciprocating motion under the action of hydraulic cylinder. Under the traction of the working device of the loader, it can flexibly tamp different positions accurately, quickly and effectively, So as to meet the requirements of single point or continuous compaction of the tamping area.

Rapid impact compactor is actually a compaction machine that compresses the soil by combining the gravity and variable force of the machine. It is also known as a dynamic compaction technology. The dynamic compaction technology is mainly used in the reinforcement of subgrade, which can improve the strength and density of the soil under the guarantee of the soil structure. In the layout of operation points of rapid impact compactor, contact type and interval type are mainly used. 

The contact type refers to that each compaction point of the pavement is in contact, which can be mainly used in the construction of pavement projects with small subgrade area and high requirements for subgrade compaction quality. The interval type refers to that there is a certain distance between each compaction point, and this compaction method needs to be determined according to the actual road conditions. In the road operation mode of rapid impact compactor, there are mainly straight-line operation method and sector operation method. Among them, the straight-line operation method matches the layout form of interval operation points. The sector operation method matches the layout of contact operation points.