Biological retention module applied to underground garage roof

Abstract

The invention relates to a biological retention module applied to an underground garage roof. The biological retention module comprises a fine aggregate concrete slope making layer, a cement mortar leveling layer, a root resistant composite waterproof layer, a lime mortar isolation layer, a fine aggregate concrete protective layer, a water discharging and storage layer, planting soil and a vegetable layer upwards from the waterproof concrete underground garage roof. The height of the water discharging and storage layer is set according to the thickness of the planting soil and the water discharge, and the thickness of the planting soil and the thickness of the water discharging and storage layer are in linear positive correlation. The water discharging treatment mode of the underground garage roof adopts structural slope making, the gradient of the slope making layer is 1%, and thus water seeping into the soil is collected into a water seepage pipe in an organized mode and finally discharged into a municipal rainwater pipe network. A planting layer can be one or more of festuca arundinacea, iris tectorum and salvia japonica. Aiming at areas with serious COD pollution problems, a plant disposition mode that the festuca arundinacea, the iris tectorum and the salvia japonica are mixed is used, and aiming at areas with serious NH4+-N and TP pollution, the festuca arundinacea or mixed plants of the festuca arundinacea, the iris tectorum and the salvia japonica are selected.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to the field of rainwater treatment, and in particular to a biological retention module applied to the roof of an underground garage. Background technique [0002] Bioretention is one of the most widely used low-impact development facilities. The bioretention module refers to the use of shallow low-lying areas to plant plants, and through the interaction between plants and soil, the rainwater on the small catchment surface is retained, purified, infiltrated and discharged. On the other hand, China is vigorously promoting the construction of "sponge cities", and has put forward clear requirements for the total annual runoff control rate of land development. However, for the purpose of cost and the maximum use of land value within the red line, the development and construction unit often excavates a large area of ​​basement close to the red line of the plot, and the thickness of the co...

AI Technical Summary

Problems solved by technology

Therefore, in terms of plant selection, it can not only reduce pollution better, but also have tenacious vitality under the condition of reducing self-weight (that is, the planting soil layer is thin, and the root system cannot be very strong). The current existing technology cannot achieve this effect.

[0004] The bioretention module applied on the roof of the underground garage in the prior art only solves the problems of drainage and self-weight reduction, but cannot achieve the purpose of reducing runoff pollution, and does not have the ability to store water, so further improvement is needed

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