Underground drainage system with first water storage and last slow infiltration functions

Abstract

The invention provides an underground drainage system with first water storage and last slow infiltration functions. The underground drainage system comprises a slow infiltration drainage structure with a filtering material, a reinforced top cover, a plurality of water permeation and water inlet openings and a plurality of separation plates. A specific structure is that the underground drainage system is provided with the filtering material which is laid in a slow infiltration drainage structure and is used for preventing suspension particles carried by surface runoff from entering a slow infiltration material; the underground drainage system is provided with the reinforced top cover at the upper part of the slow infiltration drainage structure and the reinforced top cover can be used as a side pavement, a parking lot or a ground activity place; the underground drainage system is provided with the water permeation and water inlet openings which are used for preventing large particles carried by the surface runoff from entering the slow infiltration material, and is provided with the separation plates which can be used for intercepting rainwater in the slow infiltration drainage structure and preventing the rainwater which is not slowly infiltrated and evacuated in situ from flowing into low-lying areas. By adopting the underground drainage system provided by the invention, the surface runoff can be intercepted in situ, and underground water is supplemented by in-situ slow infiltration; road surface gathered water formed by rainfall is reduced, and urban waterlogging is alleviated, so that the underground drainage system is a novel sponge body for effectively reducing the urban waterlogging.

Description

technical field [0001] The invention relates to the fields of sponge city, urban drainage and municipal engineering, in particular to an underground water storage first and then slow seepage drainage system. Background technique [0002] Inside cities, most of the surface soil and lawns are replaced by hard materials such as roofs, asphalt, concrete stone slabs or cement bricks. Due to the impermeability of such hard materials, rainwater cannot effectively penetrate into the underground soil layer, and the rainwater falling on the hard impermeable pavement forms ground runoff. When the surface runoff exceeds the drainage capacity of the urban sewer system, urban waterlogging is caused; at the same time, due to the rising groundwater level and the rapid collection of groundwater from high places to low places, the groundwater level at low places rises rapidly, and rainwater cannot pass through the underground drainage system in a timely and effective manner. Excluded to form...

AI Technical Summary

Problems solved by technology

In addition, the permeable pavement is easily blocked by sand, dust and other small particles, and the permeable pavement needs regular maintenance to maintain a high water permeability, which is costly and difficult to maintain

Thirdly, permeable pavement has relatively low strength and durability compared with traditional dense pavement, so permeable pavement can only be applied to low-traffic pavement (such as parking lots) rather than main streets in inner cities

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