In order to ensure that the permeable brick can reach the corresponding permeable effect, there must be a matching permeable subgrade. One of the characteristics of the subgrade is to ensure that rainwater can be temporarily stored and then further discharged; secondly, the stability of the foundation is ensured. Pervious brick thickness 60mm / 80mm; sand layer thickness 30; subgrade structure layer thickness 100mm / 150mm; sand layer thickness 50mm
The use of permeable bricks has outstanding ecological and environmental benefits, which are specifically manifested in the following five aspects:
1. Improve the soil environment for the growth of ground plants and adjust the ecological balance.
2. Reduce the burden on the drainage system, prevent urban rivers from having too much water, and reduce pollution in public waters.
3. Maintain groundwater resources.
4.Improve the conditions of the sidewalk and reduce the sliding force of the road surface
Therefore, the thickness and composition of the subgrade structure should be changed corresponding to the softness and hardness of the roadbed and the place where it is used.