CN112195877B - Three-partition burst-down type energy dissipation structure for inner bottom slope of gentle slope open channel - Google Patents
Three-partition burst-down type energy dissipation structure for inner bottom slope of gentle slope open channel Download PDFInfo
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- CN112195877B CN112195877B CN202010630729.2A CN202010630729A CN112195877B CN 112195877 B CN112195877 B CN 112195877B CN 202010630729 A CN202010630729 A CN 202010630729A CN 112195877 B CN112195877 B CN 112195877B
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- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
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Abstract
The invention discloses a three-partition sudden-falling type energy dissipation structure for an inner bottom slope of a gentle slope open channel, which comprises a sudden-falling bottom slope positioned in the middle of the inner bottom slope of the open channel, an upstream bottom slope and a downstream bottom slope respectively positioned at the upstream and downstream positions of the sudden-falling bottom slope, and a diffusion side wall connected and arranged along the downstream direction of the sudden-falling bottom slope; the sudden-falling bottom slope comprises a first sudden-falling bottom slope, a second sudden-falling bottom slope and a third sudden-falling bottom slope which are sequentially arranged in the direction perpendicular to the water flow direction. The invention provides a steep slope abrupt descent structure arranged in a gentle slope open channel, wherein a local steep slope rapid flow and a diffusion section are formed in the middle of the open channel, so that water jump occurs in the rear section of the open channel, the energy dissipation of the water flow is carried out by utilizing the rolling of the water jump, the flow speed of the outlet of the open channel is reduced, the erosion on a river channel or a side slope is reduced, and the water flow condition in the open channel can be further adjusted according to the flow condition through the design of a three-partition abrupt descent structure and the diffusion structure.
Description
Technical Field
The invention relates to a bottom slope three-partition sudden-falling type energy dissipation structure in a long gentle slope open channel, which is mainly suitable for dissipating energy of water flow in a construction diversion open channel in hydraulic and hydroelectric engineering and reducing erosion damage of an outlet, and belongs to the technical field of flood discharge and energy dissipation of the flow channel in the hydraulic and hydroelectric engineering.
Background
In water conservancy and hydropower engineering, the diversion open channel is used as an important temporary project to play the role of diffusing flood in construction period, but is limited by factors such as terrain, geological conditions, surrounding buildings and the like, the arrangement position of the diversion open channel is often limited, under the condition of large-flow flood overflow, the flow velocity of water flow at the outlet of the open channel is high, so that a riverbed or a bank slope is washed away, the diversion open channel is used as the temporary project, and the total investment control of the project is not facilitated by adopting conventional water flow energy dissipation facilities such as a stilling basin, an energy dissipation pier and the like, so that a water flow energy dissipation structure in the open channel, which has the advantages of simple structure, easiness in construction, low manufacturing cost and remarkable energy dissipation effect, is required.
Based on the situation, the invention provides a bottom slope three-partition sudden-falling type energy dissipation structure in a gentle slope open channel, which can effectively solve the problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a bottom slope three-zone sudden-falling energy dissipation structure in a gentle slope open channel. The invention provides a steep slope abrupt descent structure arranged in a gentle slope open channel, wherein a local steep slope rapid flow and a diffusion section are formed in the middle of the open channel, so that water jump occurs in the rear section of the open channel, the energy dissipation of the water flow is carried out by utilizing the rolling of the water jump, the flow speed of the outlet of the open channel is reduced, the erosion on a river channel or a side slope is reduced, and the water flow condition in the open channel can be further adjusted according to the flow condition through the design of a three-partition abrupt descent structure and the diffusion structure.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a three-partition sudden-descent type energy dissipation structure for an inner bottom slope in a gentle slope open channel comprises a sudden-descent bottom slope located in the middle of the inner bottom slope in the open channel, an upstream bottom slope and a downstream bottom slope respectively located in the upstream position and the downstream position of the sudden-descent bottom slope, and diffusion side walls connected and arranged in the downstream direction of the sudden-descent bottom slope; the sudden-descent bottom slope comprises a first sudden-descent bottom slope, a second sudden-descent bottom slope and a third sudden-descent bottom slope which are sequentially arranged along the direction perpendicular to the water flow.
As a preferable technical scheme of the invention, the diffusion side wall diffuses towards one side or the left side and the right side along the water flow direction, and the diffusion angle is 0-6 degrees.
As a more preferable technical solution of the present invention, the diffusion side wall includes a first diffusion side wall and a second diffusion side wall which are diffused to the left and right sides along the water flow direction to be connected to the abrupt descent bottom slope.
In a preferred embodiment of the present invention, the first and third abrupt bottom slopes have the same slope ratio, and the second and third abrupt bottom slopes may have the same or different slope ratios.
As a more preferable aspect of the present invention, a slope ratio of the abrupt descent bottom slope is set to range from 1:10 to 1: 1.
In a preferred embodiment of the present invention, the descending bottom slope is disposed within the middle portion 1/3 of the open channel.
As a more preferable technical solution of the present invention, both the upstream bottom slope and the downstream bottom slope are set to be gentle slopes.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the invention, the first sudden-descent bottom slope, the second sudden-descent bottom slope and the third sudden-descent bottom slope which are arranged at the sudden-descent section are respectively adjusted by adopting different bottom slope ratio of 1: 10-1: 1, so that three water jumps at different positions can be formed in the open channel, the flow state is further adjusted, the kinetic energy of the water flow is converted into heat energy through the rolling and mixing effects of the water jumps, and the flow velocity of the water flow is reduced
2. According to the invention, the diffusion angle of the first diffusion side wall and the second diffusion side wall arranged on the diffusion section is adjusted within the range of 0-6 degrees, so that the downstream flow velocity can be further reduced, the transition effect between local rapid flow and slow flow is increased, and the hydraulic jump effect is enhanced.
3. According to the invention, through the design of the three-partition type sudden drop structure and the diffusion structure, a local steep slope rush current and a diffusion section are formed in the middle of the open channel, so that water jump occurs in the rear section of the open channel, a local rush current state is formed by using the characteristics of water flow, the downstream is connected with the diffusion section and the slow slope open channel, the water jump is formed by using the transition of the rush current and the slow current, the energy of the water flow is reduced, and the purpose of reducing the flow speed in the open channel is achieved.
4. Compared with the conventional energy dissipation structure, the energy dissipation structure has the characteristics of simple structure, convenience in implementation and investment saving, and can be implemented in most projects.
Drawings
FIG. 1 is a schematic plan view of the present invention;
fig. 2 is a schematic cross-sectional structure of the present invention.
Reference numerals: 1-an upstream bottom slope; 2-downstream bottom slope; 3-first abrupt descent bottom slope; 4-a second abrupt descent bottom slope; 5-third abrupt descent bottom slope; 6-first diffusion side wall; 7-second diffusion side wall.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in conjunction with specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
Example 1:
as shown in fig. 1 and 2, a three-zone abrupt descent type energy dissipation structure for an inner bottom slope of a gentle slope open channel comprises an abrupt descent bottom slope located at the middle position of the inner bottom slope of the open channel, an upstream bottom slope 1 and a downstream bottom slope 2 respectively located at the upstream and downstream positions of the abrupt descent bottom slope, and diffusion side walls connected and arranged along the downstream direction of the abrupt descent bottom slope; the upstream bottom slope 1 and the downstream bottom slope 2 are set to be gentle slopes, and the abrupt descent bottom slope comprises a first abrupt descent bottom slope 3, a second abrupt descent bottom slope 4 and a third abrupt descent bottom slope 5 which are sequentially arranged along the direction perpendicular to the water flow.
Furthermore, in another embodiment, the diffusion side wall diffuses towards one of the left side and the right side along the water flow direction, and the diffusion angle range is between 0 and 6 degrees, and in the embodiment, the diffusion angle of the diffusion side wall is preferably 6 degrees, so that the downstream flow velocity of the diffusion side wall can be further reduced, the transition effect between local rapid flow and slow flow can be increased, and the hydraulic jump effect can be enhanced.
Further, in another embodiment, the diffusion side walls include a first diffusion side wall 6 and a second diffusion side wall 7 which are diffused to the left and right sides along the water flow direction to be connected with the abrupt descent bottom slope, and the diffusion angle ranges from 0 to 6 degrees.
Further, in another embodiment, the sudden drop bottom slopes are arranged in the middle 1/3 of the open channel, the slope ratio of the first sudden drop bottom slope 3, the second sudden drop bottom slope 4 and the third sudden drop bottom slope 5 is the same, the slope ratio of the sudden drop bottom slopes is set within the range of 1: 10-1: 1, after the water flow passes through the sudden drop section structure, the water flow is directly transited from a rapid flow to a slow flow, a water jump is formed in the open channel, and the kinetic energy of the water flow is converted into heat energy through the rolling and mixing action of the water jump, so that the flow speed of the water flow is reduced.
Further, in another embodiment, the descending bottom slopes are arranged in the middle 1/3 of the open channel, and the first descending bottom slope 3 has the same slope ratio as the third descending bottom slope 5 and has a different slope ratio than the second descending bottom slope 4; after the water flow passes through the sudden drop section structure, the water flow is directly transited to the slow flow from the rapid flow, three water jumps at different positions are formed in the open channel, and the kinetic energy of the water flow is converted into heat energy through the rolling and mixing actions of the water jumps, so that the flow speed of the water flow is reduced.
The working principle of the invention is as follows:
the upstream bottom slope 1 of the open channel is a gentle slope, the water flow is in a gentle flow state at the upstream, when passing through the first sudden drop bottom slope 3, the second sudden drop bottom slope 4 and the third sudden drop bottom slope 5 of the sudden drop section, the water flow can form a local rapid flow state, the downstream bottom slope 2 of the open channel keeps in the gentle slope state, according to the hydraulics principle, the water flow is directly transited to the gentle flow from the rapid flow after passing through the structure of the sudden drop section, a hydraulic jump is formed, and the further arrangement of the first diffusion side wall 6 and the second diffusion side wall 7 can further reduce the downstream flow speed, increase the transition effect between the local rapid flow and the gentle flow and strengthen the hydraulic jump effect.
In summary, the invention provides a bottom slope tri-partition abrupt descending structure in a gentle slope open channel, wherein three bottom slope local steepening structures are arranged in the middle of the open channel, a local rapid flow state is formed by utilizing water flow characteristics, a diffusion section and a gentle slope open channel are connected at the downstream, a water jump is formed by utilizing transition of rapid flow and gentle flow, water flow energy is reduced, and the purpose of reducing flow speed in the open channel is achieved.
According to the description and the drawings of the invention, a person skilled in the art can easily manufacture or use the inner bottom slope three-zone sudden-descent type energy dissipation structure of the gentle slope open channel, and can generate the positive effects recorded by the invention.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
Unless otherwise specified, in the present invention, if there is an orientation or positional relationship indicated by terms of "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art by referring to the drawings as appropriate.
Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (6)
1. The utility model provides an inner bottom slope three-zone abrupt falling type energy dissipation structure in gentle slope open channel which characterized in that: the energy dissipation structure is not provided with a stilling pool, a steep slope sudden drop structure is arranged in a gentle slope open channel, a local steep slope rapid flow and a diffusion section are formed in the middle of the open channel, so that water flow leaps in the rear section of the open channel, the water flow energy dissipation is carried out by utilizing the rolling of the water leaps, the flow speed of an outlet of the open channel is reduced, the erosion to a river channel or a side slope is reduced, and the water flow condition in the open channel is further adjusted according to the flow condition through the design of a three-partition type sudden drop structure and the diffusion structure;
the energy dissipation structure comprises a sudden-falling bottom slope positioned in the middle of a bottom slope in the open channel, an upstream bottom slope (1) and a downstream bottom slope (2) respectively positioned at the upstream and downstream positions of the sudden-falling bottom slope, and diffusion side walls connected and arranged along the downstream direction of the sudden-falling bottom slope; the sudden-falling bottom slope comprises a first sudden-falling bottom slope (3), a second sudden-falling bottom slope (4) and a third sudden-falling bottom slope (5) which are sequentially arranged in the direction perpendicular to the water flow direction;
the slope ratio of the sudden-falling bottom slope is set to be within the range of 1: 10-1: 1; the first sudden drop bottom slope, the second sudden drop bottom slope and the third sudden drop bottom slope respectively adopt different bottom slope ratios of 1: 10-1: 1, so that three water jumps at different positions are formed in the open channel, the flow state is further adjusted, the kinetic energy of the water flow is converted into heat energy through the rolling and mixing actions of the water jumps, and the flow speed of the water flow is reduced.
2. The bottom slope three-zone drop energy dissipation structure in the gentle slope open channel according to claim 1, characterized in that: the diffusion side wall diffuses towards one side or the left side and the right side along the water flow direction, and the diffusion angle is 0-6 degrees.
3. The bottom slope three-zone drop energy dissipation structure in the gentle slope open channel according to claim 2, characterized in that: the diffusion side wall comprises a first diffusion side wall (6) and a second diffusion side wall (7) which are diffused towards the left side and the right side along the water flow direction to form connection with the descent slope.
4. The bottom slope three-zone drop energy dissipation structure in the gentle slope open channel according to claim 1, characterized in that: the slope ratio of the first sudden-descent bottom slope (3) to the third sudden-descent bottom slope (5) is the same, and the slope ratio of the first sudden-descent bottom slope to the second sudden-descent bottom slope (4) can be the same or different.
5. The bottom slope three-zone drop energy dissipation structure in the gentle slope open channel according to claim 1, characterized in that: the descending bottom slope is disposed within the middle portion 1/3 of the open channel.
6. The bottom slope three-zone sudden-falling energy dissipation structure in the gentle slope open channel according to any one of claims 1 to 4 or 5, characterized in that: the upstream bottom slope (1) and the downstream bottom slope (2) are set to be gentle slopes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010630729.2A CN112195877B (en) | 2020-07-01 | 2020-07-01 | Three-partition burst-down type energy dissipation structure for inner bottom slope of gentle slope open channel |
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| CN202010630729.2A CN112195877B (en) | 2020-07-01 | 2020-07-01 | Three-partition burst-down type energy dissipation structure for inner bottom slope of gentle slope open channel |
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| CN112195877B true CN112195877B (en) | 2022-09-30 |
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| CN112854145A (en) * | 2021-01-15 | 2021-05-28 | 中国电建集团成都勘测设计研究院有限公司 | Water flow aeration structure behind flat door |
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| JP2006070537A (en) * | 2004-09-01 | 2006-03-16 | Mitsuo Yamamoto | Right-angled v-shaped energy dissipator, cascade work using the same, and stepped-down waterway using them |
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| CN104652380A (en) * | 2015-01-22 | 2015-05-27 | 河海大学 | Novel matched variable slope spillway-based flood discharging system |
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| CN206591500U (en) * | 2017-03-08 | 2017-10-27 | 浙江省水利河口研究院 | A kind of laterally-graded rectifier type stiling basin for river course of turning |
| CN108396713A (en) * | 2018-03-22 | 2018-08-14 | 交通运输部天津水运工程科学研究所 | A kind of energy dissipating construction suitable for diffusion type discharge outlet |
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2020
- 2020-07-01 CN CN202010630729.2A patent/CN112195877B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006070537A (en) * | 2004-09-01 | 2006-03-16 | Mitsuo Yamamoto | Right-angled v-shaped energy dissipator, cascade work using the same, and stepped-down waterway using them |
| CN103397619A (en) * | 2013-07-25 | 2013-11-20 | 中国长江三峡集团公司 | High- and low-sill stilling basin with function of on-way dispersive energy dissipation |
| CN104652380A (en) * | 2015-01-22 | 2015-05-27 | 河海大学 | Novel matched variable slope spillway-based flood discharging system |
| CN205804298U (en) * | 2016-07-08 | 2016-12-14 | 交通运输部天津水运工程科学研究所 | A kind of drop formula energy dissipating construction being applicable to abrupt slope trapezoidal open channel draining |
| CN206591500U (en) * | 2017-03-08 | 2017-10-27 | 浙江省水利河口研究院 | A kind of laterally-graded rectifier type stiling basin for river course of turning |
| CN108396713A (en) * | 2018-03-22 | 2018-08-14 | 交通运输部天津水运工程科学研究所 | A kind of energy dissipating construction suitable for diffusion type discharge outlet |
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