CN103266584B - A kind of hydraulic engineering energy dissipating construction - Google Patents
A kind of hydraulic engineering energy dissipating construction Download PDFInfo
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- CN103266584B CN103266584B CN201310221567.7A CN201310221567A CN103266584B CN 103266584 B CN103266584 B CN 103266584B CN 201310221567 A CN201310221567 A CN 201310221567A CN 103266584 B CN103266584 B CN 103266584B
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Abstract
A kind of hydraulic engineering energy dissipating construction, relates to the structural shape of hydraulic engineering energy dissipater.It arranges and chooses bank after gate pier, and choose bank rear end and be connected absorption basin, absorption basin end arranges baffle wall style.Its key technology is the upstream face choosing bank is domatic, and upstream face upper end is formed to infolding and chooses angle, and the angle of upstream face top and horizontal plane forms bank angle α
1, have an inclined-plane outside the top of choosing bank, what form divergent contour build falls bank; Baffle wall style tail end has a slope, and the angle of slope and force reduction pool bottom forms α
2angle.The beneficial effect that the present invention has is: arrange after gate pier and choose bank, the upstream face upper end of choosing bank is formed to infolding chooses angle, falling bank is a kind of divergent contour build, water flows out lock chamber provokes form horizontal proliferation overflow through choosing bank, falls to enter pond overflow after bank and diffuse to whole absorption basin section, enter absorption basin with less discharge per unit width through divergent contour build, submerged hydraulic jump is formed in pond, go out pond current unhurried current, the water surface is steady, with downstream tail water natural sparse model.
Description
Technical field:
A kind of hydraulic engineering energy dissipating construction, relates to the structural shape of hydraulic engineering energy dissipater.
Background technology:
Power station is built in the middle and lower reaches in river, often by dam site orographic condition, the restriction of flood discharge overcurrent width.Sluice discharge per unit width is comparatively large, head is relatively low, and these conditions make flood-discharge energy-dissipating problem become one of governing factor of engineering project playout.This kind of outlet structure escape works have that head is low, discharge per unit width is large, Froude number is low more, tailwater depth and the feature such as level of tail water drop luffing is large, also can find out that dissipation and scouring facility account for sizable ratio in addition from operating expenses aspect.Therefore, the form of outlet structure escape works and reasonable Arrangement just become the important technological problems of a restriction.
Summary of the invention:
The problem to be solved in the present invention is exactly provide a kind of energy dissipating construction pattern for low water head, large discharge hydraulic engineering flood-discharge energy-dissipating for above deficiency.Its technical scheme is as follows:
It arranges and chooses bank after gate pier, and choose bank rear end and be connected absorption basin, absorption basin end arranges baffle wall style.Its key technology is the upstream face choosing bank is domatic, and upstream face upper end is formed to infolding and chooses angle, and the angle of upstream face top and horizontal plane forms bank angle α
1, have an inclined-plane outside the top of choosing bank, what form divergent contour build falls bank; Baffle wall style tail end has a slope, and the angle of slope and force reduction pool bottom forms α
2angle.
The beneficial effect that compared with prior art the present invention has is:
1, after gate pier, bank is chosen in setting, the upstream face upper end of choosing bank is formed to infolding chooses angle, falling bank is a kind of divergent contour build, less at discharge, when downstream tailwater level is lower, water flows out lock chamber provokes form horizontal proliferation overflow through choosing bank, falls to enter pond overflow after bank and diffuse to whole absorption basin section through divergent contour build, enter absorption basin with less discharge per unit width and form hydraulic jump, be similar to flip trajectory bucket.Observe through experimental study, overflow is nearly 180 degree of fan-shaped pattern, mid portion overflow is thick compared with both sides, and flow velocity is also large compared with both sides, its place of entry relative to both sides divergent flow near downstream, whole overflow non-free trajectory nappe, there is backflow under overflow water layer, in pond, form submerged hydraulic jump, go out pond current for unhurried current, the water surface is steady, with downstream tail water natural sparse model.
2, along with the increase of discharge, the level of tail water raises, go out water seal to flow through and choose bank and provoke, spread, produce with current in absorption basin collide, spring up, aeration, in absorption basin, produce horizontal proliferation and shearing, blending, prevent the formation of secondary hydraulic jump, strengthen effect of energy dissipation, make the some mechanical of current can be converted into heat energy to leave, reduce out pond flow rate of water flow, and make velocity flow profile homogenising.Observe through model testing, complete submerged hydraulic jump is formed in absorption basin, go out the pond current water surface and have a small amount of Bubble, there is backflow under overflow water layer, reflux in each hole divergent flow intersection and upwards spring up, springing up in process with a large amount of aeration, go out the pond current water surface without falling, fluctuate less, let out, with downstream tail water natural sparse model steadily.
3, the Main Function choosing angle is when discharge is less, overflow is transversely stretched, longitudinal contraction, and current, after choosing bank, enter absorption basin with less discharge per unit width and form hydraulic jump.Change the hydraulic characteristic entering current in absorption basin, current enter absorption basin with fan spray form, make flow velocity homogenising.
4, the effect of absorption basin ensures to form the suitable depth of water in absorption basin under each operating mode, play reduce face low flow velocity, trajectory nappe impacts force reduction pool bottom and meets the comprehensive function of the conjugate condition forming submerged hydraulic jump when avoiding little discharge, the eddy structure that pool inner water stream is formed is complicated, collision blending is violent, enhance effect of energy dissipation, the secondary that effective solution water produces when flowing out absorption basin falls problem, thus further mitigates current washing away underwater bed.
5, end arranges slope baffle wall style, can adjust the velocity flow profile of pond current, can change each hydraulic parameters in absorption basin to a certain extent simultaneously.Its effect of energy dissipation is good, so to rush what respond well in downstream.
6, in sum, the present invention is directed to the flood-discharge energy-dissipating problem with features such as low water head, large discharge, Low Froude numbers, dark tail water and level of tail water drop luffing are large, there is provided a kind of and littlely choose angle, fall bank, the form of shallow water pad absorption basin combined energy dissipation, solve the problem adopting flow-shape instability in conventional low stream energy dissipating and absorption basin preferably.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention.
Detailed description of the invention:
See Fig. 1, the present invention arranges and chooses bank 2 after gate pier 1, and choose bank 2 rear end and be connected absorption basin 5, absorption basin 5 end arranges baffle wall style 7.Its key technology is the upstream face choosing bank 2 is domatic, and upstream face upper end is formed to infolding and chooses angle 3, and the angle of upstream face top and horizontal plane forms bank angle α
1, have an inclined-plane outside the top of choosing bank 2, what form divergent contour build falls bank 4; Baffle wall style 7 tail end has a slope 6, and slope 6 forms α with the angle of absorption basin 5 base plate
2angle.
Described α
1the angle at angle is at 0 ° ~ 45 °.Under identical hydrologic condition, bank height d is less, bank angle α
1larger, the boundary depth of water required during the appearance a certain fluidised form of mixed flow is lower, but the impact that bank is high is greater than Kan Jiao, generally should be arranged to low bank, to ensure to occur high sequence fluidised form as far as possible, bank high with riverbed average height for benchmark, Kan Jiao can select between 0 ° ~ 45 °, and general bank angle should be directly proportional to Froude number Fr, and Fr value is less, Kan Jiao is less, but generally should to get compared with great Kan angle be appropriate.
Described α
2the angle at angle is 30 ° ~ 90 °.To adjust the velocity flow profile of pond current.
Claims (1)
1. a hydraulic engineering energy dissipating construction, arrange afterwards at gate pier (1) and choose bank (2), choose bank (2) rear end and be connected absorption basin (5), absorption basin (5) end arranges baffle wall style (7), it is characterized in that the upstream face choosing bank (2) is domatic, upstream face upper end is formed to infolding and chooses angle (3), and the angle of upstream face top and horizontal plane forms bank angle α
1, α
1the angle at angle is 0 ° ~ 45 °, has an inclined-plane outside the top of choosing bank (2), and what form divergent contour build falls bank (4); Baffle wall style (7) tail end has a slope (6), and slope (6) form α with the angle of absorption basin (5) base plate
2angle, α
2the angle at angle is 30 ° ~ 90 °.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310221567.7A CN103266584B (en) | 2013-06-05 | 2013-06-05 | A kind of hydraulic engineering energy dissipating construction |
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| CN201310221567.7A CN103266584B (en) | 2013-06-05 | 2013-06-05 | A kind of hydraulic engineering energy dissipating construction |
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| CN103266584A CN103266584A (en) | 2013-08-28 |
| CN103266584B true CN103266584B (en) | 2015-08-19 |
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| CN103981878B (en) * | 2014-05-23 | 2016-04-13 | 四川大学 | The soil and rock construction backplate of pressure bank chosen by a kind of band |
| CN104404926B (en) * | 2014-10-08 | 2016-07-27 | 四川大学 | Dam facing chooses the overfall dam of bank shunting energy dissipating |
| CN108086260B (en) * | 2017-12-18 | 2019-07-09 | 安徽理工大学 | Differential type High-low Bucket Energy Dissipation Building-height falls bank type stilling pond system and energy dissipating method |
| CN109082997B (en) * | 2018-07-03 | 2023-10-24 | 湖北水总水利水电建设股份有限公司 | Inter-mountain aqueduct energy dissipation device |
| CN110593221A (en) * | 2019-09-05 | 2019-12-20 | 中国电建集团北京勘测设计研究院有限公司 | Fold-line type flip bucket at outlet of bank spillway/flood discharge tunnel |
| CN113605306A (en) * | 2021-08-24 | 2021-11-05 | 大连理工大学 | Energy dissipation facility combining unilateral diffusion and oblique flip bucket |
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| JPS57123315A (en) * | 1981-01-20 | 1982-07-31 | Mitsubishi Heavy Ind Ltd | Sand scouring gate |
| RU2266364C1 (en) * | 2004-04-29 | 2005-12-20 | Васильев Алексей Михайлович | Flow spreading hump of projecting spillway structure part |
| CN101538840A (en) * | 2009-03-20 | 2009-09-23 | 四川大学 | Trajectory bucket type energy dissipater in absorption basin |
| CN201526037U (en) * | 2009-10-19 | 2010-07-14 | 中国水电顾问集团华东勘测设计研究院 | Wide tail pier falling-sill bottom-flow energy dissipation structure |
| CN202530433U (en) * | 2012-03-26 | 2012-11-14 | 中国水电顾问集团成都勘测设计研究院 | Flaring pier structure of flood discharge and energy dissipation system in hydraulic and hydro-power engineering |
| CN202626947U (en) * | 2012-06-11 | 2012-12-26 | 珠江水利委员会珠江水利科学研究院 | Picking flow type flaring pier of overflow dam |
| CN203284768U (en) * | 2013-06-05 | 2013-11-13 | 中国水利水电第七工程局有限公司 | Novel hydraulic engineering energy dissipater structure |
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2013
- 2013-06-05 CN CN201310221567.7A patent/CN103266584B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57123315A (en) * | 1981-01-20 | 1982-07-31 | Mitsubishi Heavy Ind Ltd | Sand scouring gate |
| RU2266364C1 (en) * | 2004-04-29 | 2005-12-20 | Васильев Алексей Михайлович | Flow spreading hump of projecting spillway structure part |
| CN101538840A (en) * | 2009-03-20 | 2009-09-23 | 四川大学 | Trajectory bucket type energy dissipater in absorption basin |
| CN201526037U (en) * | 2009-10-19 | 2010-07-14 | 中国水电顾问集团华东勘测设计研究院 | Wide tail pier falling-sill bottom-flow energy dissipation structure |
| CN202530433U (en) * | 2012-03-26 | 2012-11-14 | 中国水电顾问集团成都勘测设计研究院 | Flaring pier structure of flood discharge and energy dissipation system in hydraulic and hydro-power engineering |
| CN202626947U (en) * | 2012-06-11 | 2012-12-26 | 珠江水利委员会珠江水利科学研究院 | Picking flow type flaring pier of overflow dam |
| CN203284768U (en) * | 2013-06-05 | 2013-11-13 | 中国水利水电第七工程局有限公司 | Novel hydraulic engineering energy dissipater structure |
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| CN103266584A (en) | 2013-08-28 |
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