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Canal-head manual-diversion curved conduit

A curved and artificial technology, applied in artificial waterways, water conservancy projects, special data processing applications, etc., can solve problems such as high cost, erosion and silting deformation of water diversion bends, and influence on the normal operation of water diversion canal heads, so as to avoid erosion or sedimentation Deformation, ensuring normal water diversion, and the effect of geometric section shape stability

Inactive Publication Date: 2010-01-06
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sometimes, due to the unreasonable selection of the size of the diversion bend, serious erosion and silting deformation in the diversion bend will affect the normal operation of the diversion head, and a lot of manpower and material resources have to be rebuilt

Method used

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  • Canal-head manual-diversion curved conduit
  • Canal-head manual-diversion curved conduit
  • Canal-head manual-diversion curved conduit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0067] It is known that the designed flow rate of an artificial diversion bend Q=300m 3 / s, average particle size of suspended sand d m =0.045m, roughness n=0.035, slope coefficient of trapezoid cross section m=1.5. The above-mentioned optimized design method is applied to design the artificial diversion curve.

[0068] solution:

[0069] First, the design flow rate Q of the curve and the average particle size of suspended sand d m , Roughness n, slope coefficient m and other known values ​​are substituted into the mathematical model for the optimization design of the artificial diversion bend declared for this patent, and the bottom width b, the water depth h and the curvature radius R of the bend center are obtained. c , The center length of the curve L c .

[0070] Then, substituting the values ​​of b, h, the design flow rate Q, roughness n, and slope coefficient m of the curve into the following Manning formula to obtain the vertical drop J of the diversion curve.

[0071] J ...

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Abstract

The invention discloses a canal-head manual-diversion curved conduit. The curved conduit has a trapezoidal cross section and comprises structural parameters, such as a cross section bottom width b, an average water depth h, a curved conduit center curvature radius Rc and a curved conduit center length Lc which are calculated by lower right mathematic formulas. The invention can generate stable and violent cross current, avoid generating great washing or silting deformation in the operation process, keep the relative stability of the geometric cross section of the diversion curved conduit and ensure the normal diversion of an intake sluice.

Description

Technical field [0001] The invention relates to a low-head water diversion canal head project, in particular to an artificial diversion bend at the canal head. Background technique [0002] The function of the artificial diversion bend in the diversion canal head is to form a horizontal circulation, so that the surface clear water flows to the concave bank and enters the channel through the inlet gate; the sand-laden water at the bottom flows to the convex bank and is discharged to the downstream river channel (such as figure 1 ). The stronger and more stable the circulation in the diversion bend, the better the effect of diversion and sand removal. Therefore, the design of the diversion bend is related to the success or failure of the entire diversion canal. At present, the design of the artificial diversion bend in the diversion canal head is mainly based on experience or model tests, and there is no guidance by theoretical methods. Therefore, there is a lot of randomness and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B5/00G06F17/50
Inventor 徐国宾刘昉
Owner TIANJIN UNIV