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Method and structure for providing downstream ecological flow after diversion and discharge structures are lowered

A drainage structure and building technology, which is used to provide the downstream ecological flow field after the diversion drainage structure is lowered, and can solve the problems of difficulty in meeting the downstream ecological flow requirements, gate vibration, and high technical risk, etc., to achieve Avoid repeated startup and shutdown, ensure safety and stability, and reduce technical risks

Active Publication Date: 2016-01-20
CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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  • Description
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  • Application Information

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Problems solved by technology

In view of the fact that the electric butterfly valve has no successful engineering practice experience, the opening of the flat steel gate under dynamic water conditions will easily cause the gate to vibrate, and the technical risk is high. Therefore, the above technical solutions are difficult to meet the downstream ecological flow requirements.

Method used

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  • Method and structure for providing downstream ecological flow after diversion and discharge structures are lowered
  • Method and structure for providing downstream ecological flow after diversion and discharge structures are lowered
  • Method and structure for providing downstream ecological flow after diversion and discharge structures are lowered

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Embodiment Construction

[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0016] look first figure 1 , figure 2 , figure 1 shows the layout of the present invention, figure 2 The cross-sectional layout of the present invention is shown. It can be seen from the figure that the technical solution of the present invention is mainly to use the pumping equipment 6 to supply water to the permanent water retaining structure 2 and the downstream water retaining structure 1 before the diversion and discharge structure 1 is lowered. The foundation pit between the cofferdams 4 is flushed. image 3 It shows that a water gap 5 is set in the downstream water retaining cofferdam 4, and the flow elevation of the water gap 5 decreases continuously with the time of discharging the ecological flow, so as to ensure the uniformity of the downstream ecological flow.

[0017] Figure 4 Figure 5 The structural layout and construct...

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Abstract

The invention discloses a method for providing downstream ecological flow after gate locking of a stream guidance water release structure. The method is characterized in that before a gate of the stream guidance water release structure (1) is locked, water is stored in a foundation pit between a water retaining structure (2) and a downstream water retaining cofferdam (4), and at least one water passing notch (5) is formed in the top of the downstream water retaining cofferdam (4); after the gate of the stream guidance water release structure (1) is locked, the water passing notch (5) provides the ecological flow for the down stream. The invention further discloses a drainage structure based on the method. By means of the technical scheme, the method and the structure are small in technical risk, simple, easy to implement, convenient to use and practical, sufficiently use layout characteristics of hydraulic structures, are low in cost, can have good effects, cannot leave permanent defects for the hydraulic structures and are worth of being popularized.

Description

technical field [0001] The invention relates to a water diversion and drainage technical scheme of a hydraulic structure, in particular to a method and structure for providing downstream ecological flow after the diversion and drainage structure is closed. Background technique [0002] At present, according to the national environmental assessment and soil and water conservation requirements, water conservancy and hydropower projects must ensure downstream water supply during the storage period of the gate. In the feasibility study and design stage of hydropower projects, holes and electric butterfly valves are generally installed on the inlet steel gates of the diversion and drainage structures, or the imported steel gates are partially opened to control the opening of the gates to achieve the purpose of downstream ecological flow. In view of the fact that the electric butterfly valve has no successful engineering practice experience, the opening of the flat steel gate unde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B1/00E02B8/06
Inventor 周先练卢昆华易春菊郭勇路文珍翟张宏王洪军
Owner CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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