Sponge city inland river channel with trapezoidal compound section and design method thereof

A sponge city and design method technology, applied in chemical instruments and methods, waterway systems, artificial waterways, etc., can solve the problems of unsatisfactory living conditions of animals, plants and microorganisms in water, damage of water purification ability, and biological reduction, etc., to meet the requirements of drainage capacity, avoid sedimentation, and save costs

Pending Publication Date: 2022-04-26
中冶南方城市建设工程技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, most of the channel management adopts the traditional design concept. The artificial stiff piles harden the channel, which cannot meet the living conditions of animals, plants and microorganisms in the water, resulting in the reduction of organisms in the channel and the destruction of the purification ability of the water itself.

Method used

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  • Sponge city inland river channel with trapezoidal compound section and design method thereof
  • Sponge city inland river channel with trapezoidal compound section and design method thereof
  • Sponge city inland river channel with trapezoidal compound section and design method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0053] as attached figure 1As shown, a sponge city inland river channel with a trapezoidal compound section includes a channel 1 with a trapezoidal compound section, a sedimentation pond 2 connected to the end of the trapezoidal compound section channel, and an overflow discharge channel 3 connected to the sedimentation pond.

[0054] as attached image 3 As shown, the channel with a trapezoidal compound section is composed of a main channel 11 and a beach 12 located on both sides of the main channel. Landscape plants 13 that are resistant to flooding and drought are planted on the beach. The rainwater passes through the main channel in the dry season, and the rainwater floods through the beach in the flood season.

[0055] The sediment carried by the water flow in the channel is deposited in the sedimentation pond 2, which is convenient for centralized dredging treatment, and the upper clear water in the sedimentation pond 2 is discharged to the downstream water body through ...

Embodiment 2

[0063] Taking a channel in Wuhan as an example, the river bed gradient of the channel is 0.35‰, the roughness of the main channel is 0.026, the roughness of the beach is 0.028, and the catchment area around the channel is 2.0km 2 , and the comprehensive runoff coefficient is 0.51, so the channel design of the trapezoidal compound section is carried out.

[0064] The design method of the sponge city inland channel with trapezoidal complex section, including:

[0065] Step 1. First determine the drainage flow of the designed channel. According to the "Wuhan City Rainstorm Intensity Formula and Design Rainstorm Type" (DB4201 / T 641-2020), a unified rainstorm intensity formula is adopted. The annual maximum value method is used to calculate the rainstorm intensity formula, and the expression The formula is as follows:

[0066]

[0067] In the formula, P is the return period (a), t is the rainfall duration (min), and q is the design rainstorm intensity [L / (s hm 2 )].

[0068] ...

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Abstract

The invention discloses a sponge city inland river channel with a trapezoidal compound section, which comprises a trapezoidal compound section channel, the tail end of the trapezoidal compound section channel is connected with a settling pond, and the settling pond is connected with an overflow discharge channel. The invention further discloses a design method of the sponge city inland river channel with the trapezoidal compound section. Water flows through the main channel in the dry season, rainwater overflows the bottomland to discharge flood in the flood season, the flood drainage capacity of the channel in the flood season can be met, and the landscape effect of the channel in the dry season can be guaranteed. A large amount of silt is deposited in the convex bank area and the bottom of the settling pond through the arranged settling pond, later positioning desilting is facilitated, the problem of channel along-way desilting is solved, and cost is saved. The dam gate is installed at the inlet of the overflow discharge channel connected with the settling pond, and the water level in the settling pond is controlled by adjusting the opening degree of the gate in the dry season, so that the on-way water level of the channel is adjusted, and the problems of sediment deposition and the like caused by arranging a stepped water retaining dam are solved.

Description

technical field [0001] The invention relates to a river channel and a design method thereof, in particular to a sponge city inland river channel with a trapezoidal compound section and a design method thereof, belonging to the technical field of water conservancy engineering channel design. Background technique [0002] Most of the inland rivers in southern cities are drainage channels, and the main sources of channel water flow are rainwater outfalls along the banks and natural rainfall. The characteristic of this channel is that the water volume varies greatly with the seasons, the flow is small in the dry season, and the flow is large in the rainy season, especially the peak flow in the case of heavy rain. [0003] In this case, in order to meet the drainage requirements of the channel, the channel section is generally designed according to the larger return period flow. When the rainfall is low in the dry season, the water depth along the channel is small and the landsc...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): E03F1/00E03F3/04E03F5/14E02B5/00E02B5/02E02B1/00B01D21/02
CPCE03F1/00E03F3/046E03F5/14E02B5/00E02B5/02E02B1/00B01D21/02
Inventor周宇冯振鹏艾庆华赵芳
Owner中冶南方城市建设工程技术有限公司