Thousands of Shanghai Yang Sports Facilities Engineering Co., Ltd. artificial turf artificial turf instructions or "artificial turf" turf name suggests, is purely human product, different from the natural grass, artificial turf is the PA, PP, PE material pulled into the grass yarn with PP woven mesh by Tedder, sewn together, and then through the small of the rubber, so that the two complexes together. It is a purely human product. Artificial turf base can be divided into three basic materials: cement concrete base, asphalt base and foundation Panax dust. Cement concrete foundation 1. Flatness: Flatness pass rate above 95%, 5 m straightedge error 3mm. 2. Applications of artificial grass slope: center field 3 ‰ -4 ‰, Turtle drainage design. Curve 8 ‰, straight 5 ‰, semicircular area 5 ‰, the surface should be flat, smooth, ensure drainage. 3. The strength and stability: even a solid surface, no cracks, no bad side seams straight and smooth, about 6000mm × 6000mm cuts as well. Cushion compaction, density of greater than 95%, after a mid-sized mill press, no significant wheel tracks, loose topsoil, waves and other phenomena. The impermeable layer: new PVC thick impermeable film, lap should be days to 200mm, edge margin greater than 150mm. 5. Maintenance of: basic maintenance period of 21 days. 6. Location: the exact construction and draw lines, need for strong distinctive markers in each line mark the site. Asphalt base 1. Flatness: foundation should have a certain strength and stability, foundation cracks and not the product due to uneven heaving caused by freezing, flatness pass rate above 95%, three meters straightedge error 3mm. 2. slope: horizontal <1%, longitudinal <1 ‰, high jump area <4 ‰, the surface should be flat and smooth to ensure drainage. 3. The strength and stability: the best use of free asphalt-based wax, wax-containing little or bituminous material, which must be fully compacted asphalt mixture. Surface uniformly solid, smooth and no cracks, no bad side of packing, no pockmarked face, seams are smooth.