The concrete structures on the track and field venues are small in size and scattered in position. When the concrete is poured, preparations must be made at the construction site, such as unobstructed traffic roads, complete power supply equipment at the construction site, complete electric gates, and complete vibration equipment.
Concrete should be covered with tightly covered transport vehicles, preferably with transport mixers. When cement concrete is poured into the mold, it should be started from a low point, such as 3000m running obstacle pool, starting from the lowest side, and pouring layers. The first layer shall not exceed 40cm. The concrete after pouring shall be compacted by inserting vibrators. When moving, the distance between the plug-in vibrators should not exceed 1.5 times the vibrator's working radius. Note that the side molds must not be collided with, and the steel bars must not contact the steel bars. The distance between the plug-in vibrators and the formwork should be kept between 50 and 100 mm. Inserted into the concrete of the lower layer, the insertion depth is 50~100mm. The use of the plug-in vibrator is required to be lifted slowly to prevent holes in the concrete. Each site requires vibration and compaction. Generally, the cement concrete stops sinking. Bubbles appear, and the surface is flat. Special attention should be paid to the fact that the plug-in vibrator is permanently moved in one place, causing mortar and gravel to separate inside the concrete.
The poured concrete should be maintained in time to prevent cracks from occurring due to changes in temperature, wind, and sunlight.
At the same time as the concrete is poured, the concrete phenomenon should be produced by a full-time staff.
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