Grass grid construction

Ⅰ. Base treatment
1. Compacting the foundation soil: The foundation soil should be compacted layer by layer, and the density should reach more than 85%. For the foundation of soft plastic-fluid plastic silt layer, it is recommended to dump stones and roll them until dense.
2. Setting up the gravel cushion layer: Lay a 150mm thick gravel cushion layer. The specific method is to mix 10% of medium-coarse sand, 60% of 20-40 particle size gravel, and 30% of clay soil, and spread and roll them until dense.
3. Setting up the stabilization layer: Lay a 60mm thick stabilization layer (also used as a planting layer). The method is to mix 25% of 10-30 particle size gravel, 15% of medium coarse and fine river sand, 60% of cultivated soil and add appropriate amount of organic fertilizer. The three are evenly mixed, spread on the gravel cushion layer, and rolled to compact.

Ⅱ. Paving of grass grids
1. Fertilization of the base layer: Sprinkle a little organic fertilizer on the base layer to provide nutrients for the growth of plants in the grass grids.
2. Paving grass grids: According to the design requirements and site size, artificial grass grids are laid. The outer dimensions of the grass grids are usually designed according to the size modulus of the parking space, so they generally do not need to be cut during paving. However, if the parking space has special shape requirements or there are obstacles such as sewage manhole covers on the parking space, the grass grids need to be cut to meet the requirements of different shapes.
3. Filling nutrient soil: Sprinkle planting soil in the concave planting groove of the grass grid and sweep it evenly into the grass grid holes with a broom. The height of the soil layer is based on 5~10mm below the plane of the grass grid. It is recommended to use high-quality nutrient soil for filling to ensure the normal growth of plants.

III. Planting and maintenance
1. Planting plants: Spread turf or sow grass seeds on the planting soil layer of the grass grid. If you choose to lay turf, compact the turf on the planting soil and water it thoroughly to make the turf soft. Then use a small roller or a flat vibrator to press the grass roots into the grass grid (repeatedly) to make it easier for the grass roots to grow downward.
2. Watering and maintenance: After planting, watering and maintenance should be carried out. When watering, ensure that the water can penetrate into the soil in the grass grid to promote plant growth. Keep the soil moist after watering, but avoid water accumulation.
3. Subsequent maintenance: During the maintenance period, weeds should be removed, fertilized and lawns should be mowed regularly. The lawn needs to be mowed 4 to 6 times a year to maintain a good landscape effect. In hot and dry seasons, watering should be done frequently or automatic sprinkler equipment should be installed to ensure the normal growth of plants.

IV. Precautions
1. Drainage slope: The gravel foundation requires compaction and the surface requires flatness. It is best to have a drainage slope of 1% to 2% to facilitate the discharge of excess precipitation.
2. Grass grid connection: Each grass grid has a link buckle, which is linked together during paving. After the grass grid is paved, use a small roller or a flat vibrator to press back and forth on the surface of the grass grid to ensure that the surface of the grass grid is level.
3. Usage restrictions: Grass grids are mainly used in places where greening and parking functions are taken into account, such as community green belts, ecological parking lots, etc. For places where vehicles travel frequently and at high speeds, such as major vehicle traffic roads, it is recommended to still use concrete pavement. Only in specific circumstances, such as roads where vehicles only enter in emergency situations, such as fire emergencies, can grass grid pavement be used.

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