Method for improving conveyance capacity of large-scale water diversion project without influencing normal water supply
A technology of flow capacity and normal water supply, applied in water conservancy projects, water supply devices, artificial waterways, etc., can solve the problems of limited increase in flow capacity of large channels, interference of original water flow in channels, need for water stop maintenance, etc., to achieve over flow Increased capacity, increased hydraulic gradient, and the effect of avoiding safety risks
Active Publication Date: 2021-02-02
CHANGJIANG SURVEY PLANNING DESIGN & RES
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Problems solved by technology
Reconstruction and expansion measures for channel engineering, such as increasing the water delivery section, require water suspension for maintenance, which is not applicable to water diversion projects with a high water supply guarantee rate
In addition, some devices that increase the flow rate of the channel water body to increase the flow capacity, such as the Chinese patent CN104404921A, interfere with the original water flow of the channel because the device is arranged at the bottom of the channel, and have limited effect on increasing the flow capacity of large channels
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[0056] The present invention will now be described in detail by taking the application of the present invention to improve the flow capacity of a large-scale water diversion project as an example, and it also has a guiding effect on the application of the present invention to improve the flow capacity of other large-scale water diversion projects.
[0057] Take a large (I) type water diversion project in China as an example. The design maximum flow of water delivery project is 420m 3 / s, mainly open channel water delivery, the total length of the main channel is about 1196km. 60 control gates are arranged along the line, and the main canal is divided into 60 canal sections. After many years of operation of the project, phenomena such as siltation and shell vegetable adhesion inevitably exist, and there are also phenomena such as damaged lining boards in the canal project, which may have a certain impact on the flow capacity of the water transfer project, increasing the water ...
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The invention discloses a method for improving conveyance capacity of a large-scale water diversion project without influencing normal water supply. A gate-type tubular pump is additionally arranged at an outlet maintenance gate of a water delivery building, so that the conveyance capacity is more remarkably improved under the condition that normal water supply and conveyance are not influenced. The method comprises the following steps that S1, according to the conveyance capacity improving requirement of a water conveying channel, the hydraulic slope in a channel section is deduced; S2, the minimum lift of the gate-type tubular pump is estimated by using L, i according to the hydraulic slope in the channel section; S3, the lift value of the gate-type tubular pump is drawn up, the conveyance capacity of the water conveying channel under different lift conditions is calculated, and a conveyance capacity-lift curve corresponding relation is drawn; and S4, the gate-type tubular pump is installed in an access gate sharing gate groove. The method for improving conveyance capacity of the large-scale water diversion project without influencing normal water supply has the advantages that normal water supply is not influenced, and meanwhile the conveyance capacity is remarkably improved.
Description
technical field [0001] The invention relates to the field of construction and operation of large-scale water transfer projects, and more specifically relates to a method for improving the flow capacity of large-scale water diversion projects without affecting normal water supply. Background technique [0002] Since the 21st century, my country has built a number of large-scale water diversion projects to provide urban water supply, agricultural irrigation, and ecological water replenishment to water-shortage areas. With the increase of operation years, the channel flow capacity of large-scale water diversion projects may not reach the design scale, or it may be difficult to meet the increasing water demand of users. The flow capacity of the channel is far lower than the original design level, or when the channel is designed for transmission or the flow is increased, the actual operating water level of the channel exceeds the original design value, and the superelevation of t...
Claims
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IPC IPC(8): E02B5/00E02B5/08E03B5/00
CPCE02B5/00E02B5/08E03B5/00
Inventor 吴德绪黄会勇吴永妍刘少华张娜李波万蕙
Owner CHANGJIANG SURVEY PLANNING DESIGN & RES