Secondly, pave the base course: pave the graded sand with the thickness of 150~ 180mm (the maximum particle size does not exceed 60mm, and the minimum particle size does not exceed 0.5mm), level and compact, and the compactness will reach over 95%.
Thirdly, the leveling layer is laid: the leveling layer is made of medium sand with a thickness of 30mm, which requires a certain gradation, that is, the graded sand with a particle size of 0.3-5mm is used for leveling.
The last pavement layer: the surface layer is lawn brick. When paving, lawn bricks should be laid according to the design pattern. When paving, gently flatten and stabilize with a rubber hammer, but the edges and corners of the brick shall not be damaged. Then fill the brick hole with nutrient soil, manually clean the impurities such as fine sand cement in the lawn brick, and then plant soil, fertilize and water. When paving lawn bricks, it is easy to be loose, and the vegetation grows poorly, which makes the vegetation look bad and will lose its use value. Therefore, in the construction, we must pay attention to the planting after the grass layer.