Method capable of being used for rain water seepage-filtering, collection and storage and purification in sponge city

Abstract

The invention discloses a method capable of being used for rain water seepage-filtering, collection and storage and purification in a sponge city.The method comprises the steps of firstly, selecting an appropriate position, excavating a foundation pit of a biological detention pond and water storage wells, and laying open vertical-rim stone strips 5-10 cm away from the two sides of the road surface of the biological detention pond.The biological detention pond comprises a rubble cover layer, a vegetation planting soil layer, a charcoal filler layer and a gravel drainage layer in sequence from top to bottom, and seepage-proof films are laid at the periphery and the bottom of the biological detention pond.An overflow pipe is laid on the gravel drainage layer, an overflow port in the upper end is 5-10 cm higher than the rubble cover layer, and the lower end is connected with a municipal drainage pipe network.The system can be applied to the places such as a residential area, a campus, a parking lot, a park and a road, rainwater can be collected and stored, the content of pollutants such as nitrogen, phosphorus and heavy metal in the rainwater can be reduced, the recycling purpose is achieved, finally, urban inland inundation is effectively alleviated, and rainwater utilization efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of urban rainwater storage and purification, and specifically relates to the field of a rainwater infiltration, storage and purification multifunctional system that can be used in sponge cities. technical background [0002] Sponge city refers to a city that can be like a sponge and has good "elasticity" in adapting to environmental changes and responding to natural disasters. use. In recent years, with the frequent occurrence of extreme weather, waterlogging is common in many cities in my country after heavy rainfall. Recently, the concept of "sponge city" has attracted more and more attention in solving urban waterlogging, and has been written into construction plans one after another. In the past, the methods and ideas for controlling urban waterlogging in my country were relatively simple, focusing on the pursuit of large-area hardened pavement, adding and expanding infiltration facilities and undergro...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method that can be used for the infiltration, storage and purification of rainwater in sponge cities, so as to solve the problem that urban rainwater is not easy to be accumulated and the secondary pollution caused during the accumulation process

Images