Rainwater retention system

Abstract

The invention relates to the technical field of urban rainwater management, in particular to a rainwater retention system. The rainwater retention system comprises a covering layer, a soil medium layer and a drainage layer which are arranged from top to bottom. The covering layer comprises a plurality of covering layer recycled aggregate particles, the soil medium layer comprises a soil medium recycled aggregate assembly and a landscaping waste compost product assembly, and the drainage layer comprises a plurality of drainage recycled aggregate particles. According to the rainwater retention system, arrangement of a transition layer is avoided, the drainage pipe does not need to be wrapped by geotechnical cloth, the overall structure is simple, it can be guaranteed that the emptying time of the system at the initial operation stage reaches 1-3 h, soil particle loss can be prevented, the blocking risk is low, the failure risk is small, and plant growth can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of urban rainwater management, in particular to a rainwater retention system. Background technique [0002] With the continuous intensification of the urbanization process, the natural hydrological characteristics of the city have been destroyed, which has brought about a series of problems such as water resources, water environment, and water security. For this reason, my country proposed to build a sponge city in 2013. The rainwater source reduction system is one of the sponge city construction technology systems, and the bioretention technology is one of the important source emission reduction technologies. It mainly reduces the amount of runoff rainwater and removes pollutants through the comprehensive effects of media infiltration, filtration and adsorption, and plants. , are widely used in our country. [0003] According to the water quantity and water quality control principle of bioretention technol...

AI Technical Summary

Problems solved by technology

Because there is too much silt or clay in the upper soil medium, the loss is serious with the seepage process of rainwater, and it continues to accumulate in the transition layer, resulting in blockage of the transition layer, which leads to the failure of the rainwater retention system; or part of the silt or clay is directly lost into the drainage layer, Cause the drainage layer to be blocked, or the stagnant system to be discharged by the drain pipe, and eventually lead to the collapse and damage of the entire structural layer

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