Description:The strong, medium and weak travel gears of the Rapid Impact Compaction machine can adjust the impac...
Update time:2022-07-11 15:55:21
Number of views:352
How many gears does the working intensity of Rapid Impact Compaction machine fall into? It is a concern of many road users who have just started to use the hydraulic compactor. In order to better use the equipment, it is necessary to have a deeper understanding of the working mechanism of the hydraulic compactor.
Rapid Impact Compaction machine, similar to impact roller and dynamic compactor, tamps the foundation by producing instantaneous strong impact force. The Rapid Impact Compaction machine lifts the upper hammer head to the set height through the hydraulic oil cylinder, and then quickly reverses the force. The upper hammer head accelerates to fall under the joint action of gravity and the thrust of the hydraulic oil cylinder, and hits the lower hammer head through the conductive pad, so as to achieve the purpose of "soft and powerful" tamping the foundation.
Under the violent impact external load of the compactor, the foundation soil particles overcome the friction resistance between particles to produce sliding and rolling displacement, move and fill to a more subtle and stable position, resulting in the compression of void volume, and the reduction of soil gap, that is, the subgrade surface gets a better compaction effect.
The upper hammer head is the key working device of the Rapid Impact Compaction machine, which is connected with the piston rod of the oil cylinder. It works up and down through the power output provided by the loader or excavator and other load-bearing devices. It is divided into product models of different sizes according to the weight of the upper hammer head and the tamping strength. According to different construction requirements, different falling heights of the upper hammer head are selected to meet different tamping needs, that is, what we call strong, medium Lower three working gears.
The strong, medium and weak travel gears of the Rapid Impact Compaction machine can adjust the impact force. The working stroke of the hydraulic compactor is equivalent to the well-known "amplitude" parameter of the roller, that is, the absolute value of the maximum displacement of the hammer on the hydraulic compactor during compaction.
We know that with the increase of "amplitude", the displacement of soil particles will increase, the impact energy of hydraulic compactor on the ground will increase, and the propagation distance of shock wave in the soil will increase, so as to get a better compaction effect. However, too large amplitude will affect the structures close to each other, and may also cause "over compaction" of the pavement, resulting in loose soil materials, layered segregation of graded materials, and reduced compaction quality.
The tamping operation of the Rapid Impact Compaction machine is not necessarily the best in the strong gear. Although the "amplitude" of the low and middle gears is reduced, its "vibration frequency" is relatively enhanced. "Vibration frequency" is also an important factor affecting the particle motion state of the compacted foundation material, which will also have a direct impact on the compactness of the compacted foundation.
According to the theory of soil vibration compaction, the closer the vibration frequency is to the natural frequency of the compacted material, that is, when the vibration wave resonates with the soil, the better the compaction effect is. When the particles of the basic material are in the resonance state, the friction between the materials will be reduced and the fluidity will be enhanced. At the same time, the edges and corners of the particles will be broken by high-frequency impact, which will reduce the gap. Under the action of compaction, they will queue up again, especially the small particles will be quickly mixed between the large particles to squeeze out the air and water in the gap.
Therefore, during the use of the Rapid Impact Compaction machine, the matching vibration frequency and amplitude should be reasonably selected according to the different tamping objects, that is, the reasonable working gear should be selected, and the two should be coordinated and complementary in order to obtain the ideal tamping effect.
How to use the low, medium and strong working gears of Rapid Impact Compaction machine reasonably? It should be combined with the characteristics and performance of the compaction machinery itself, and at the same time, it should also be determined according to the actual situation of the soil type during construction and its physical and mechanical properties, as well as the objective and natural environment of the site, as well as the highway grade and compactness requirements of the construction. If necessary, it should also be determined by the actual data and effects obtained from the test section.
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