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Circular open channel

An arc-shaped, open channel technology, applied in the field of water conveyance open channels, can solve problems such as construction difficulties, and achieve the effects of reducing engineering costs, improving conveying capacity, and being difficult to overflow.

Inactive Publication Date: 2012-12-19
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the designed water delivery flow is relatively large, the scale of the water delivery open channel project will increase, and the construction of such projects in rugged mountainous areas is very difficult

Method used

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Experimental program
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Embodiment Construction

[0012] Such as figure 1 Shown in the figure: arc-shaped open channel 1, channel bottom 2, arc-shaped side wall 3, vertical side wall 4.

[0013] Arc-shaped open channel 1, through the transformation of the left and right side walls of the channel with a rectangular cross-section, the cross-sectional shape of the channel becomes arc-shaped, so the flow state of the water flow in the channel is a spiral flow. The cross-sectional area of ​​the arc-shaped open channel must be able to accommodate all the flowing water without overflowing. As far as the shape of the section is concerned, the diameter of the arc-shaped side wall (side part): the ratio of the width of the bottom of the channel (the width of the straight line) is 1: 1.5- 1.6. The central angle of the arc-shaped side wall is 180-220 degrees. If 210 degrees is marked in the figure, there is a 30-degree shield. The thickness of the vertical side wall at the top of the arc-shaped side wall is 0.2-0.3 meters, and the ratio...

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Abstract

The invention discloses a circular open channel. For the circular open channel, the cross section of the wall of the open channel is transversely capsule-shaped; the two ends of the wall of the open channel are circular; the circular wall at the upper end is provided with a shield, or is prolonged to form a linear wall for shielding the bottom of the open channel; and the circular open channel can be prepared into an open channel concrete pre-cast block having a certain length and the cross section, a total-cross-section pre-cast block, or two pre-cast blocks having a certain length and separated by the central symmetrical line. Water flows in a spiral flow manner in the channel, and the open channel is an efficient channel; the open channel is especially suitable for areas where the surface slope is large, the longitudinal slope gradient of the channel is large, and the channel needs to be bent; through the spiral flow, the upward energy produced by a high-speed water flow which impacts the side wall of the conventional open channel with a rectangular section is turned into rotational energy, so that the water flow in the channel neither overflows, nor washes against a side slope or damages the main body of the channel; and besides, the circular open channel can reduce the scale of a project, thus reducing the design and construction difficulties of the project, and saving the cost of the project.

Description

technical field [0001] The invention relates to the design of an open channel with energy dissipation function, especially the design of a curved water delivery open channel with a large vertical slope gradient under the condition of mountain terrain. Background technique [0002] The cross-section of the artificial open channel is generally a regular geometric shape, and the common ones are rectangle, trapezoid, triangle and circle. In areas with flat terrain, the cross-section of the water delivery channel can be in the shape of rectangle, trapezoid or triangle according to the water delivery needs and different conditions. If it is a regular geometric shape such as a rectangle or trapezoid, then the shape of the cross-sectional water flow will change, especially when the channel needs to turn due to terrain factors. Spilled channels, scour to slopes, and damage to channels. Energy dissipation measures are usually taken to control the water flow in open channels with ste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B5/00
Inventor 张兴奇
Owner NANJING UNIV
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