What is the technical principle of Rapid Impact Compaction?What are the technical advantages of Rapid Impact Compactors?

Rapid Impact Compactor is a compaction machine that uses the combined force of machine gravity and hammer body to compress the soil. According to the structural characteristics of the Rapid Impact Compactor, it can be classified as a tamping machine, according to the form of action on the ground, the Rapid Impact Compaction machine belongs to the dynamic compaction machinery.

Technical principle of Rapid Impact Compaction

The technical principle (compaction mechanism) of Rapid Impact Compaction machine is the power compaction method, referred to as the "dynamic pressure method".

Dynamic compaction is based on static (also known as gravity) compaction, and a greater dynamic force is applied to improve the compaction effect; Rapid Impact Compactor tamping is the hammer body directly hit the ground at maximum speed, with the typical characteristics of large impact and fast attenuation.

Power compaction uses the combined force of variable force and machine gravity to compress the soil. Both dynamic compaction and compaction have an impact, but the power compaction is accelerated from static, the peak of the impact force is much smaller and the duration is longer, the impact compaction is to hit the ground at the maximum speed, and the peak of the impact force is much larger and the attenuation is faster. If the compaction method is used to strengthen the back of the bridge platform or form the subgrade, the strong shear of the hammer body to the soil destroys the soil structure; While compressing the soil at high speed on the front of the hammer body, it squeezes the soil to the surrounding area at high speed, generating a strong shear wave with great destructive force.

Rapid Impact Compactor technical advantages

The resistance (bearing capacity) of the subgrade soil in the process of being compacted continues to increase, and three conditions must be met to continue to compress the soil:

Sufficient force takes into account that the decay of the force in the non-rigid body is faster, and the force (pressure, pressure) per unit area must be significantly greater than the deformation resistance of the soil.

Sufficient energy, the displacement and extrusion deformation of soil particles require energy consumption. The compaction equipment must release enough energy (effective work) to the pressurized soil within the required time, rather than how much energy the compaction equipment has.

Sufficient action time After the force of the soil particles, the transfer of force to the deep layer, and the release of energy all require an appropriate action time period, and the elastic recovery after resistance to soil particle compression also takes time.

The reason why the roller can only be used for thin layer and surface compaction is because it is walking, and there is not enough time and energy to affect the deep layers. Why is the strong rammer with huge impact force and energy inferior to the HC36 Rapid Impact Compaction machine in the comparative test, this is because in the face of the hard surface, the strong rammer heavy hammer hits the ground at a high speed at the maximum final speed, the heavy hammer rebounds on the ground, the peak of the force is large, the decay is fast, the action time is short, and the huge energy is not fully released on the effect on the soil.

The fundamental difference between the Rapid Impact Compaction and the strong rammer is that the lower hammer and rammer assembly with greater inertia are set between the heavy hammer and the soil body, which converts the impact energy into pressure energy, and the grounded rammer accelerates from scratch and gradually decays after reaching the highest point. The peak of the force is small, the action time is long, the energy is released sufficiently, and it is not easy to produce shear waves (horizontal waves, shear waves) when compacting non-rigid bodies with low hardness of the soil foundation. As a result, Rapid Impact Compactions can compress thicker soils close to most highway structures such as abutments. The high-frequency continuous action of the Rapid Impact Compaction machine on the soil makes the compressed soil tend to be stable.

The structural form and technical characteristics of the Rapid Impact Compaction machine determine that the product has the function of compressing the subgrade soil with high strength, and the working parameters can be adjusted in a wide range to determine that the product can adapt to the processing requirements of different parts of the subgrade and different filling stages, and the Rapid Impact Compaction machine meets the above three necessary conditions, and has significant advantages in the reinforcement of the highway subgrade and the treatment of special parts.

summary

All in all, the Rapid Impact Compactor has played a very important role in highway construction, and its technical principles and advantages can be more in line with the conditions and requirements of highway compaction, and it is also a new type of construction machinery with promotional value and significance.