1. When the internal vibrator is used to vibrate concrete, the moving distance of the internal vibrator should not be greater than 1.5 times the action radius of the vibrator, the depth of inserting the lower concrete should be 50~ 100mm, and the distance from the side formwork should be 50 ~100 mm. ..
When it is necessary to change the horizontal position of the vibrating rod in the concrete mixture after vibrating, the vibrating rod should be slowly lifted vertically while vibrating, and the vibrating rod should not be dragged horizontally in the mixture. Don't use a vibrator to drive away concrete.
2. The moving distance of the surface vibrator should be able to cover the edge of the vibrated part.
3. The spacing and vibration energy of the attached vibrators shall be determined through experiments and shall be closely connected with the formwork.
4, should avoid collision template, steel bar and other embedded parts.
5. The vibration time of each vibration point is 20 ~ 30s, subject to no sinking of concrete, no bubbles and no laitance on the surface, so as to prevent over-vibration and vibration leakage.
6. Special attention should be paid to the vibration of box girder web and bottom plate, bearing at the joint of top plate, anchorage zone of prestressed reinforcement and construction joints and other reinforcement-intensive parts.
7. When using a shaking table to vibrate, the process design should be done in advance.
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