Reasonable choice of concrete vibration machinery
First, the power form choice
Electric vibrator is widely used in construction. When there is only single-phase power supply in the construction site, vibrator with phase series motor should be used.There are three - phase power supply, you can choose a variety of electric vibrators.In the working environment with gas, the pneumatic vibrator must be selected to ensure safety.If away from the town, no power supply of temporary engineering construction, you can choose internal combustion type vibrator.
Second, the reasonable choice of the structure form
For columns, beams and walls with large area of concrete foundation, slabs with large thickness, and tamping of prefabricated components, insert vibrator is available;The structure with dense rebar or thin concrete, and the place where it is not suitable to use insert type vibrator, can choose attached type vibrator;Large and flat surface area of the structure, such as the ground, roof, road surface, usually choose the plate type vibrator.And the hollow board, flat plate and beam and column components with small thickness produced by the reinforced concrete precast component factory can be rammed quickly and effectively by using vibration table.
Three, the choice of plug-in vibrator
The vibration frequency of vibrator is an important factor affecting the compaction effect. Only when the vibration frequency of vibrator is the same or similar to the natural vibration frequency of concrete particles can the best compaction effect be achieved.Since the resonance frequency of particles depends on the size of particles, the natural vibration frequency of large particles is low, while the natural vibration frequency of small particles is high. Therefore, for concrete with large aggregate particles and smooth surface, insert vibrator with low frequency and large amplitude should be selected.
High frequency vibrator should be used for hard concrete, which can improve the effect of vibration, increase the effect of liquefaction, expand the range of compaction, and reduce the compaction time. However, it is not suitable for concrete with greater fluidity, or concrete will be isolated.According to the concrete composition of building construction, it is suitable to choose high frequency vibrator.The structure of the insert vibrator adopts soft shaft type, which is portable and flexible, and can be carried by a single person. It can be adapted to the upper and lower floors or narrow place passage, etc. The transfer is very convenient, and it is very suitable for the use of basic level building units.
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