A drainage-retaining pavement structure and construction method for reducing urban heat island effect

Abstract

The invention discloses a drainage-retaining pavement structure for reducing the urban heat island effect, and a construction method thereof. The drainage-retaining pavement structure sequentially comprises an asphalt stabilized crushed stone base layer (6), a low water seal layer (5), a water-storing crushed stone layer (4), a macroporous water-retaining concrete layer (3), a water-permeable stress absorbing layer (2) and a macroporous water-permeable asphalt concrete layer (1) arranged from the bottom layer to the top layer thereof. A drainage curb structure (7) is arranged on one side of the macroporous water-permeable asphalt concrete layer (1) near the curb, and a drainage filter screen (8) is arranged on the side of the macroporous water-permeable asphalt concrete layer (1) adjacentto the pavement, and drainage pipes (9) are installed below the drainage curb structure (7); And a drainage curb structure (7) with a drainage filter net (8) is installed on the drainage conduit (9) which is pre-buried at the curb band. On the one hand, the invention ensures no accumulated water on the road surface in rainy season and improves driving safety; on the other hand, the collected watercan gradually absorb heat and evaporate, thus lowering the surface temperature of the road and alleviating the heat island effect of the city.

Description

technical field [0001] The invention relates to a drainage-retaining pavement structure for reducing the urban heat island effect and a construction method thereof, belonging to the technical field of functional road materials and structures. Background technique [0002] Municipal roads are an important part of urban transportation infrastructure. They are widely distributed and occupy a huge area. Therefore, effective use of municipal road structures is crucial to building a green and ecological city. In recent years, the concept of sponge city has provided a direction for the improvement of urban municipal roads. Generally speaking, by setting the drainage pavement structure to quickly remove the pavement water, slow down the reflection of the road surface at night, and improve the anti-skid performance of the pavement to ensure driving safety. However, most of the water, which is an important resource, is collected through drainage channels and is excluded from the road...

AI Technical Summary

Problems solved by technology

[0003] At this stage, there are few studies on the protection and drainage functions of urban roads, but there are also many problems: 1) The drainage road surface is mainly constructed of porous asphalt concrete. The pavement structure is gradually compacted and deformed, the pores are gradually reduced, and the drainage performance is significantly reduced; 2) In terms of water-retaining pavement structure, on the one hand, porous asphalt concrete is used as the matrix, and water-retaining materials are poured into the pore structure to achieve the water-retaining function. It has an impact on water retention or drainage; on the other hand, Chinese patent document CN103952959B discloses a surface layer semi-water retention type permeable asphalt pavement, and a water retention structure is set in the surface layer, but this structure cannot be the temperature of the upper layer of asphalt pavement. conditions to help

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