In the past, the raw materials for sidewalks were mostly selected from asphalt, which may be softer than cement, and their water permeability and drainage function were unsatisfactory to the needs of the sponge city. The intention of the sponge city is that the city has the flexibility to respond to environmental changes. The permeable brick can stop the absorption and storage of rainwater and use it.
Therefore, in the construction of the sidewalk of the municipal city of Sponge City, the permeable brick must achieve a reasonable interweaving of drainage channels and pavement engineering to ensure the drainage function of the roadside and the fluctuation of the underground water storage function. The scientific selection of good raw materials for permeable bricks is the foundation of the journey. No matter how good the construction technology is, assuming that the raw materials are unqualified, the quality of the entire construction will be greatly reduced.
Therefore, the selection of the raw materials for the pedestrian path must first satisfy the quality requirements of the project, and secondly the raw materials must have a higher standard in water permeability and drainage function.
Therefore, the sidewalk paving level should be: the first layer is to select the gravel with strong water permeability; the second layer is to stop the laying of the seepage soil layer, the intention is to stop the filtration of impurities in the water; the third layer is to use more than 20cm of permeable concrete Ensure the erratic nature of the walking surface; the fourth layer selects graded crushed stones; the fifth layer is anti-seepage geotextile to ensure water storage.