400m track and field venue elevation is how to control?
The elevation of the 400m track and field venue should be based on the elevation of the design document. Sometimes the design documents give relative elevations, such as ±O.OOm given the top of the gutter cover plate in the site. To ensure the coordination of the site with the permanent building during construction, and the relationship between the site of the drainage ditch and the municipal trunk, check the design in detail. The relationship between the elevation and the site ±O.0m, and then calculate the height of the inner ring ditch cover is ±O.OOm.
The specific method is to introduce permanent standards into the track and field field. In the opposite direction of the track and field, two temporary standards are established. Each volume is 50cm x 50cm x 70cm. The steel piles are buried in the center and the top of the pile is the inner ring ditch. The ceiling height of the cover plate, which is assumed to be ±O.OOm, is for construction use. The two points are checked each other once a month. See diagram
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