Overflow opening structure of biological detention facility

Abstract

The embodiment of the invention relates to the technical field of rainwater collection and purification of sponge cities, and provides an overflow opening structure of a biological detention facility.The overflow opening structure comprises a low-return-period overflow pipeline, an overflow well and a siphonage pipeline, a pipe opening of the low-return-period overflow pipeline is lower than a wellhead of the overflow well, one end of the siphonage pipeline is connected with the low-return-period overflow pipeline, the other end of the siphonage pipeline is connected with the overflow well, the end, connected with the low-return-period overflow pipeline, the siphonage pipeline is higher than the end, connected with the overflow well, of the siphonage pipeline, and the lower part of the overflow well communicates with a rainwater pipeline. The overflow opening structure of the biological detention facility has multi-stage overflow to achieve overflow drainage at different return periods, a siphonage drainage mode is adopted to increase the instantaneous drainage flow rate and improve the overflow capacity, the problems of insufficient overflow capacity and facility water accumulating of a biological detention facility are avoided, the overall structure is simple, the cost is low, the effect is significant, and use mounting and later operation and maintenance are convenient.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of rainwater collection and purification in sponge cities, and more specifically, to an overflow structure of a bioretention facility. Background technique [0002] In recent years, the problem of urban waterlogging and waterlogging has become serious, and drainage and waterlogging prevention have become one of the important contents of my country's urbanization work. With the release and implementation of the "Technical Specifications for Urban Waterlogging Prevention and Control" (GB51222-2017), it provides important standard basis and support for urban drainage and waterlogging prevention work. According to the requirements of the code, the urban waterlogging prevention and control system includes major engineering subsystems such as emission reduction at the source, drainage pipes and channels, and waterlogging and risk reduction. The three subsystems deal with rainfall events with...

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides a bioretention facility overflow structure, which can realize hierarchical overflow under different recurrence rainfall conditions, and enhance the overflow drainage capacity of the bioretention facility under low return period rainfall conditions by means of siphon drainage. So as to solve the problem of insufficient flow capacity of the traditional overflow structure

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