CN106702978A - Low-overflow dam equal-water head step-by-step energy dissipation structure - Google Patents
Low-overflow dam equal-water head step-by-step energy dissipation structure Download PDFInfo
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- CN106702978A CN106702978A CN201710055568.7A CN201710055568A CN106702978A CN 106702978 A CN106702978 A CN 106702978A CN 201710055568 A CN201710055568 A CN 201710055568A CN 106702978 A CN106702978 A CN 106702978A
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- overfall dam
- dam
- stiling basin
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/06—Spillways; Devices for dissipation of energy, e.g. for reducing eddies also for lock or dry-dock gates
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a low-overflow dam equal-water head step-by-step energy dissipation structure. The structure comprises an overflow dam; the overflow dam is provided with a first-grade overflow dam absorption basin, a second-grade overflow dam absorption basin and a third-grade overflow dam absorption basin; the first-grade overflow dam absorption basin is connected with the dam top of the overflow dam through an equal-water head first-grade overflow dam vertical wall surface; the bottom of the first-grade overflow dam absorption basin is connected with an equal-water head first-grade drainage energy dissipation pipe; the second-grade overflow dam absorption basin is connected with a first-grade overflow dam absorption basin streamline sill through an equal-water head second-grade overflow dam vertical wall surface; and the bottom of the first-grade overflow dam absorption basin and the bottom of the second-grade overflow dam absorption basin are connected with an equal-water head second-grade drainage energy dissipation pipe. Compared with the prior art, the structure adopts such designs as equal-water head energy dissipation pipe graded drainage energy dissipation, equal-water head graded vertical overflow, flooding jet absorption basin energy dissipation, advanced overflow and reservoir capacity increment, and is prominent in cavitation resisting effect of overflow surfaces, better in energy dissipation effect, simple in structure, lower in maintenance cost and larger in popularization space.
Description
Technical field
The present invention be directed to concrete overflow dam in overflow, there is cavitation and cavitation erosion in overflow surface often, and lower sluicing stream is right
The heads such as the serious a kind of low overfall dam for washing away and designing in riverbed energy-dissipating structure step by step.It belongs to hydraulic engineering field.
Background technology
At present, most concrete overflow dam spillwag chutes are designed to streamlined curved surface.During overflow, the potential energy of top current compared with
Greatly, relatively lower speed, more toward lower, the speed of current is bigger, thus in design and construction, it is desirable to spillwag chute will be smoothed, no
There is bluff body structure to reduce the generation of cavitation and cavitation erosion.But in actual motion, overfall dam surface is because constructing, exposing to the weather
Etc. factor, spillwag chute there is also slight raised depression；After overflow, spillwag chute will occur cavitation phenomenon, when serious, steel
Concrete under muscle is all emptied so that maintenance cost increases year by year, meanwhile, concentrate energy dissipating more tight to washing away for underwater bed
Weight, thus prior art Shortcomings.
The content of the invention
The technical problems to be solved by the invention are directed to above-mentioned the deficiencies in the prior art, and provide a kind of low overfall dam etc.
Head energy-dissipating structure step by step.The gross head potential energy of overflow first, is carried out decile by it using Energy Dissipation Modes step by step, allows gross energy
Each segmentation is decomposed, the energy of every section of overflow is diminished, while by the conventional streamlined curved surface of overflow, become vertical plane, with
This solves the Cavitation of spillwag chute；Second, penetrated using the import of water drainage energy dissipation pipes at different levels, turnaround section, outlet and underwater outfall
Stream carries out segmentation energy dissipating；3rd, carry out energy dissipating using stiling basin；Finally, one-level water drainage energy dissipation tube inlet gate can in advance be beaten
Open, carry out energy dissipating in advance, vacate larger storage capacity.The deficiencies in the prior art are evaded with this.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of heads such as low overfall dam energy-dissipating structure step by step, including overfall dam, it is characterised in that：Set on the overfall dam
It is equipped with one-level overfall dam stiling basin, two grades of overfall dam stiling basins and three-level overfall dam stiling basin, the one-level overfall dam disappears power
Pond, two grades of overfall dam stiling basins and three-level overfall dam stiling basin are set along the width of the overfall dam and height gradually drops
Low, one-level overfall dam stiling basin passes through first-class head one-level overfall dam vertical walls and is connected with the dam crest of overfall dam, described one
The bottom of level overfall dam stiling basin is connected with first-class head one-level water drainage energy dissipation pipe, and the grade head one-level water drainage energy dissipation pipe is L-type
Pipe, wherein including horizontal tube and VERTICAL TUBE, VERTICAL TUBE are connected to the bottom of one-level overfall dam stiling basin, horizontal tube one end with it is vertical
Pipe is connected, and the other end of horizontal tube is located at the medial surface of the overfall dam, and entering in the head one-level water drainage energy dissipation pipe such as described
Mouth sets one-level water drainage energy dissipation tube inlet gate；Two grades of overfall dam stiling basins pass through two grades of overfall dam vertical walls of first-class head
Face is connected with the one-level overfall dam stiling basin streamline bank of the one-level overfall dam stiling basin, in the bottom of one-level overfall dam stiling basin
The head Municipal secondary effluent energy dissipating pipe such as it is connected with the bottom of two grades of overfall dam stiling basins, the grade head Municipal secondary effluent energy dissipating pipe includes
First vertical tube, the second vertical tube and the horizontal tube being connected between the first vertical tube and the second vertical tube, wherein the first vertical tube is connected to
The bottom of one-level overfall dam stiling basin, the second vertical tube is connected to two grades of bottoms of overfall dam stiling basin；The three-level overfall dam disappears
Power pond passes through two grades of overfall dam stiling basin streams of first-class head three-level overfall dam vertical walls and the one-level overfall dam stiling basin
Line bank is connected, and the three-level overfall dam stiling basin outside sets three-level overfall dam stiling basin streamline bank.
Apparatus of the present invention its structures is made up of three parts：Step by step overfall dam vertical walls part, step by step etc. head draining disappear
Can tube portion, step by step stiling basin part.In overfall dam vertical walls part step by step, its mechanism is：The totality overflow of decile overfall dam
Highly, every section of low water head flowing of overfall dam is realized, the water velocity of overfull dam surface is reduced, preventing and treating cavitation and cavitation erosion occurs.By
The head water drainage energy dissipation tube portions such as level, its mechanism is：Instantly when sluicing stream flows through the head water drainage energy dissipation pipe such as at different levels, for pipeline
For, at the border change of import, pipeline in pipeline and exit can all carry out local energy dissipating, because stiling basin bottom is provided with
Water drainage energy dissipation pipe is exported, and submerged jet energy dissipating can be produced in stiling basin water.In stiling basin part step by step, dam overflow is carried out
The combined type energy dissipating such as rotary roll, bottom of pond jet in drop energy dissipating, pond.Advantages of the present invention：Using etc. head classification water drainage energy dissipation, etc.
The designs such as head classification vertical-overflow, jet type cooking stiling basin energy dissipating, can reduce the generation of the anti-cavitation cavitation corrosion of spillwag chute, carry
Preceding overflow, increase storage capacity, simple for structure, maintenance cost are relatively low, promote space larger.
Brief description of the drawings
Fig. 1 is apparatus of the present invention schematic diagram.
Wherein：1st, overfall dam；The 2nd, the head one-level water drainage energy dissipation pipe such as；3rd, one-level water drainage energy dissipation tube inlet gate；The 4th, the water such as
Head Municipal secondary effluent energy dissipating pipe；The 5th, the head one-level overfall dam vertical walls such as；6th, one-level overfall dam stiling basin；7th, one-level overfall dam disappears
Power Chi Liuxiankan；The 8th, two grades of overfall dam vertical walls of head such as；9th, two grades of overfall dam stiling basins；10th, etc. head Municipal secondary effluent disappears
Can pipe jet mouthful；11st, two grades of overfall dam stiling basin streamline banks；The 12nd, the head three-level overfall dam vertical walls such as；13rd, three-level overflow
Dam stiling basin；14th, three-level overfall dam stiling basin streamline bank.
Specific embodiment
Control accompanying drawing 1, one-level water drainage energy dissipation tube inlet gate 3 is slided with water inlet of head one-level water drainage energy dissipation pipe 2 is waited
Contact, waits the bottom of head one-level overfall dam vertical walls 5 to be connected with one-level overfall dam stiling basin 6, one-level overfall dam stiling basin 6
Right side connects with one-level overfall dam stiling basin streamline bank 7, waits the water outlet jet orifice of head one-level water drainage energy dissipation pipe 2 to be overflow positioned at one-level
Stream dam stiling basin 6 bottom, waits two grades of tops of overflow vertical dam wall 8 of head to connect with one-level overfall dam stiling basin streamline bank 7, etc.
Two grades of bottoms of overfall dam vertical walls 8 of head connect with two grades of overfall dam stiling basins 9, and the bottom of one-level overfall dam stiling basin 6 is set
Deng the water inlet of head Municipal secondary effluent energy dissipating pipe 4, head Municipal secondary effluent energy dissipating pipe jet mouthful 10 and two grades of bottoms of overfall dam stiling basin 9 are waited
Portion is connected, and two grades of right sides of overfall dam stiling basin 9 connect with two grades of overfall dam stiling basin streamline banks 11, wait head three-level overfall dam to hang down
The top in straight wall face 12 is connected with two grades of overfall dam stiling basin streamline banks 11, waits the bottom of head three-level overfall dam vertical walls 12
It is connected with three-level overfall dam stiling basin 13, the right side of three-level overfall dam stiling basin 13 and the phase of three-level overfall dam stiling basin streamline bank 14
Connect.
The course of work：When reservoir needs overflowing-drainage, first by opening one-level water drainage energy dissipation tube inlet gate 3, carry
Before discharge water, improve storage capacity, lower sluicing stream by etc. the water inlet of head one-level water drainage energy dissipation pipe 2 the head one-level draining such as enter and disappear
Local energy dissipating can be carried out in pipe 2, then by etc. head one-level water drainage energy dissipation pipe 2 delivery port jet energy dissipating；Instantly sluice stream
Respectively through the top of grade head one-level overfall dam vertical walls 5 and the delivery port of grade head one-level water drainage energy dissipation pipe 2, successive earial drainage
When, by etc. the top of head one-level overfall dam vertical walls 5 current and wait penetrating for the delivery port of head one-level water drainage energy dissipation pipe 2
Stream, while carrying out energy dissipating into one-level overfall dam stiling basin 6；Then, the water body of one-level overfall dam stiling basin 6, passes through respectively
The entrance of head Municipal secondary effluent energy dissipating pipe 4 and wait head Municipal secondary effluent energy dissipating pipe jet mouthfuls 10 and disappear by one-level overfall dam
Power pond streamline bank 7, etc. two grades of overflow vertical dam walls 8 of head, flow into two grades of overfall dam stiling basins 9, carry out secondary concentration energy dissipating；
Water body after the energy dissipating of two grades of overfall dam stiling basins 9, via two grades of overfall dam stiling basin streamline banks 11 and waits head three-level
Overfall dam vertical walls 12, energy dissipating is carried out into three-level overfall dam stiling basin 13 is interior.
Claims (1)
1. a kind of head such as low overfall dam energy-dissipating structure step by step, including overfall dam, it is characterised in that：Set on the overfall dam
There are one-level overfall dam stiling basin (6), two grades of overfall dam stiling basins (9) and three-level overfall dam stiling basin (13), the one-level is overflow
Flow the width side of dam stiling basin (6), two grades of overfall dam stiling basins (9) and three-level overfall dam stiling basin (13) along the overfall dam
To set and height gradually reduce, one-level overfall dam stiling basin (6) by first-class head one-level overfall dam vertical walls (5) with overflow
The dam crest for flowing dam is connected, and first-class head one-level water drainage energy dissipation pipe is connected with the bottom of the one-level overfall dam stiling basin (6)
(2), grade head one-level water drainage energy dissipation pipe (2) is L-type pipe, including horizontal tube and VERTICAL TUBE, and wherein VERTICAL TUBE is connected to one-level
The bottom of overfall dam stiling basin (6), horizontal tube one end is connected with VERTICAL TUBE, and the other end of horizontal tube is located at the interior of the overfall dam
Side, and in entrance setting one-level water drainage energy dissipation tube inlet gate (3) of head one-level water drainage energy dissipation pipe (2) such as described；It is described
Two grades of overfall dam stiling basins (9) are by two grades of overfall dam vertical walls (8) of first-class head and the one-level overfall dam stiling basin
One-level overfall dam stiling basin streamline bank (7) is connected, in the bottom of one-level overfall dam stiling basin (6) and two grades of overfall dam stiling basins
(9) bottom such as is connected with head Municipal secondary effluent energy dissipating pipe (4), grade head Municipal secondary effluent energy dissipating pipe (4) including the first vertical tube,
Second vertical tube and the horizontal tube being connected between the first vertical tube and the second vertical tube, wherein the first vertical tube is connected to one-level overfall dam
The bottom of stiling basin (6), the second vertical tube is connected to two grades of bottoms of overfall dam stiling basin (9)；The three-level overfall dam stiling basin
(13) disappeared power by first-class head three-level overfall dam vertical walls (12) and two grades of overfall dams of the one-level overfall dam stiling basin
Chi Liuxiankan (11) is connected, and three-level overfall dam stiling basin (13) outside sets three-level overfall dam stiling basin streamline bank (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710055568.7A CN106702978B (en) | 2017-01-24 | 2017-01-24 | The heads such as low overfall dam energy-dissipating structure step by step |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710055568.7A CN106702978B (en) | 2017-01-24 | 2017-01-24 | The heads such as low overfall dam energy-dissipating structure step by step |
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| CN106702978A true CN106702978A (en) | 2017-05-24 |
| CN106702978B CN106702978B (en) | 2018-10-23 |
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| CN201710055568.7A Expired - Fee Related CN106702978B (en) | 2017-01-24 | 2017-01-24 | The heads such as low overfall dam energy-dissipating structure step by step |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107190805A (en) * | 2017-07-31 | 2017-09-22 | 长沙理工大学 | A kind of water system and operation method for being applicable height irrigated area |
| CN107513986A (en) * | 2017-10-09 | 2017-12-26 | 安徽理工大学 | A kind of multi-level cone shape sand discharge energy dissipator |
| CN109577290A (en) * | 2018-12-21 | 2019-04-05 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of blowdown system suitable for high dam reservoir |
| CN112900381A (en) * | 2021-01-26 | 2021-06-04 | 珠江水利委员会珠江水利科学研究院 | Rotatory stilling pool formula dissipation structure suitable for shaft |
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| CN105756022A (en) * | 2016-03-03 | 2016-07-13 | 河海大学 | Method for preventing water of release structure from over-step flowing and stepped energy dissipater |
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| US4650368A (en) * | 1985-05-10 | 1987-03-17 | American Threshold Industries, Inc. | Flood water containment bag |
| RU2233362C1 (en) * | 2003-05-30 | 2004-07-27 | Носов Евгений Георгиевич | Reconstruction method for spill-away of high concrete arched barrage (variants) |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107190805A (en) * | 2017-07-31 | 2017-09-22 | 长沙理工大学 | A kind of water system and operation method for being applicable height irrigated area |
| CN107513986A (en) * | 2017-10-09 | 2017-12-26 | 安徽理工大学 | A kind of multi-level cone shape sand discharge energy dissipator |
| CN109577290A (en) * | 2018-12-21 | 2019-04-05 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of blowdown system suitable for high dam reservoir |
| CN112900381A (en) * | 2021-01-26 | 2021-06-04 | 珠江水利委员会珠江水利科学研究院 | Rotatory stilling pool formula dissipation structure suitable for shaft |
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| Publication number | Publication date |
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| CN106702978B (en) | 2018-10-23 |
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Granted publication date: 20181023 Termination date: 20220124 |