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Biological detention facility internal drainage system achieving rainwater dual-effect control and implementation method

A bioretention and drainage system technology, applied in waterway systems, drainage structures, and sewage removal, etc., can solve problems affecting normal operation, limited infiltration rate of bioretention facilities, inundation, scouring, blockage, etc. Avoid overwashing and calculate the effect of simple steps

Active Publication Date: 2017-08-29
HOHAI UNIV
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Problems solved by technology

For the southern humid areas with large rainfall totals and peak values, the infiltration rate of bioretention facilities is limited, and flooding, scouring, blockage, etc. may occur, affecting its normal operation

Method used

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  • Biological detention facility internal drainage system achieving rainwater dual-effect control and implementation method
  • Biological detention facility internal drainage system achieving rainwater dual-effect control and implementation method
  • Biological detention facility internal drainage system achieving rainwater dual-effect control and implementation method

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Embodiment Construction

[0050] Below in conjunction with specific embodiment, further illustrate the present invention, should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various equivalent forms of the present invention All modifications fall within the scope defined by the appended claims of the present application.

[0051] For the internal drainage system of bioretention facilities with double-effect control of rainwater in humid areas, bottom drains and overflow weirs are added to the bioretention facilities to control the total amount and peak value of rainwater respectively. The bottom drains are mainly used for total rainwater regulation and storage , the overflow weir is mainly used to control the peak value of rainwater; the bottom drainage pipe is set under the permeable layer of the bioretention facili...

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Abstract

The invention discloses a biological detention facility internal drainage system achieving rainwater dual-effect control and an implementation method. A drain pipe and a downflow weir are additionally arranged in a biological detention facility to serve as an auxiliary drainage facility so as to achieve the dual-effect control targets of regulation of the rainwater runoff volume and reduction of the peak flow. Bottom drain pipe and downflow weir design flow design steps are put forward according to the runoff volume in a sponge city construction technology guide and rainwater peak flow control standards in a specification for outdoor drainage design (2014 edition). A computing method of bottom drain pipe and downflow weir key parameters is obtained through reckoning according to related hydraulic formulas and rainfall characteristics in humid areas. By means of the method, the defect that in the past, people only take the runoff volume as the control target is overcome, and the method can serve as an important design basis of a southern humid area biological detention facility drainage system and provides a reference for sponge city facility construction in other areas.

Description

technical field [0001] The invention relates to a drainage system of a biological retention facility, in particular to an internal drainage system of a biological retention facility aimed at double-effect control of rainwater in humid areas and a realization method thereof, belonging to the technical field of rainwater treatment. Background technique [0002] Urban rainstorm and flood disaster reduction technology has become a key issue that urgently needs to be solved in the sustainable development of my country's economy. Under the new situation, the construction of "sponge city" vigorously promoted by the state emphasizes the natural accumulation, natural infiltration and natural purification ability of the urban surface in the process of natural circulation of rainwater, especially the process of infiltration, and highlights the characteristics of low-impact development of urban construction. Bioretention facilities are an effective stormwater management measure for low-...

Claims

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Application Information

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IPC IPC(8): E03F1/00E03F5/00G06F17/50
CPCE03F1/002E03F5/00G06F30/13G06F2113/14
Inventor 朱立琴张雪张海阔高成姜翠玲
Owner HOHAI UNIV
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