Green roof structure with rainwater retaining ability

Abstract

The invention discloses a green roof structure with the rainwater retaining ability. The green roof structure comprises a plant layer, a soil layer, a filtering layer, a water storage and drainage layer, a moisture preservation layer and a waterproof layer from top to bottom; the plant layer is composed of perennial herbs, namely sedum lineare, the planting row spacing is 4-6 cm, and the line spacing is 8-10 cm; the soil layer is composed of mixtures of light sandy soil, humus and vermiculite, and the thickness of the soil layer is 15-20 cm; the filtering layer is composed of polyester fiber non-woven fabrics and extends towards the side wall surface of a building to the part below surface soil by 5 cm, and the effective width of lap seams is 10-20 cm in the laying process; the water storage and drainage layer is composed of polyethylene concave-convex drainage boards with the thickness ranging from 30 mm to 60 mm; the moisture preservation layer is composed of moisture preservation blankets with the thickness ranging from 20 cm to 30 cm, and the moisture preservation blankets are arranged adjacently and closely; the waterproof layer is composed of polymer modified asphalt root-resisting waterproofing membranes. The green roof structure has the advantages that the land resources are saved, the green area is increased, the environment is beautified, the heat island effect is reduced, the storm runoff is lowered, and the air pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of roof water storage and drainage, in particular to a green roof structure with rainwater retention capacity. Background technique [0002] With the acceleration of urbanization, the area of ​​urban impermeable underlying surfaces (roofs, roads, squares, parking spaces, etc.) continues to expand, resulting in increased surface runoff and faster runoff speed. The rainfall retention capacity in urban areas has been greatly weakened, which has brought huge pressure to the urban drainage system, resulting in frequent floods in major cities in recent years, which have had a serious impact on people's lives, especially in the old cities that mostly use combined drainage systems. It also affects the stability of animal and plant habitats. As an important part of the urban impermeable underlying surface, the roof plays a very important role in the rainfall runoff, and occupies a relatively large area in the city. ...

AI Technical Summary

Problems solved by technology

Over time, green roofs will become a popular building product due to their environmental benefits, however, their high cost will be a limiting factor

In general, experts on green roofs believe that the high cost is mainly due to the fact that the material is lifted to the roof by a crane, expensive labor and high insurance premiums, etc.

In addition, the mass of the green roof is relatively large, which results in a more important column, beam, and slab design, resulting in a more expensive structure

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