Hidden water purification drainage ditch and construction method thereof

Abstract

The invention relates to the technical field of municipal drainage, in particular to a concealed water purification drainage ditch and a construction method thereof. The drainage ditch comprises a drainage ditch body, water filtering stone is laid on the top of the drainage ditch body, the drainage ditch body is arranged in a foundation soil layer, a supporting filter plate is arranged on a middle layer of the drainage ditch body and divides the drainage ditch body into a top filtering layer and a bottom water containing layer, and the water filtering stone comprises fine filtering gravel and coarse filtering gravel. The construction method comprises the construction steps of design calculation, drainage ditch body prefabrication, surveying and setting out, earth excavation, base detection and leveling, drainage ditch body installation, filter material laying and earth backfilling. The drainage ditch and the sponge concept are combined, the drainage ditch is suitable for sponge city construction, the water quality is improved at the water quality source, pollution transfer is prevented, the overflow function is added, the drainage ditch can cross a filtering layer when rapid drainage is needed, the drainage efficiency is improved, meanwhile, the whole drainage ditch is buried underground, only a small part of the drainage ditch is exposed, and environmental pollution and landscape damage are reduced.

Description

technical field [0001] The invention relates to the technical field of municipal drainage, in particular to a concealed clean water drainage ditch and a construction method thereof. Background technique [0002] The concept of sponge city has been actively promoted in various regions of my country. Cities at all levels have integrated the concept of "sponge city" to varying degrees in the development process, and LID (Low Impact Development: low-impact development) facilities are used to fully and reasonably manage rainwater. Utilization, the sponge city has good flexibility in adapting to environmental changes and dealing with natural disasters caused by rain, so it can also be called "water elastic city". The water treatment of the sponge city includes seepage, stagnation, storage, and purification , use and discharge and other requirements. [0003] At present, the functions of infiltration, stagnation and storage in the water treatment of the sponge city have been relativ...

AI Technical Summary

Problems solved by technology

[0003] At present, the functions of infiltration, stagnation and storage in the water treatment of the sponge city have been relatively perfect, but there are still many defects in the purification and drainage.

Untreated rainwater is collected through drainage ditches and directly discharged into municipal rainwater wells. Especially the initial rainwater collected in squares and other places that are prone to non-point source pollution will form point source or non-point source pollution in the urban municipal pipe network, resulting in rainwater pipes The rainwater in the grid needs to be further treated or the treatment process can be improved to meet the discharge standard; whether it is a sponge city or an ordinary city, the sudden increase of rainwater often causes waterlogging disasters, and when a disaster occurs, it is necessary to quickly discharge the accumulated water; direct exposure The mouth of sewer pipes will emit odor and breed bacteria and mosquitoes, affecting the sanitation of the city

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