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Plastic drainage plate construction site, the following preparations should be made

(1) removal of construction work in and around obstacles;

(2) the leveling of ground and construction site elevation measurement provides measurement and control of datum points;

(3) laying construction survey baseline, according to construction plans, construction zone boundary, and the acceptance of formalities;

(4) laying machinery into the appearance of pioneer road;

(5) construction machines and walking need to lay drainage of sand cushion and measured after the formation of elevation, construction to avoid mixed with dirt, debris, sand permeability, particle size distribution and clay content to meet design requirements;

(6) at the design district area borders, area measurement out plate and made the tag, Board position deviation is less than 30mm, total amount of plastic drainage plate and each sector should be identical to the design number.

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