CN107190711B - A kind of combined energy dissipater of suitable high moisture head and small flow flood-discharge energy-dissipating - Google Patents
A kind of combined energy dissipater of suitable high moisture head and small flow flood-discharge energy-dissipating Download PDFInfo
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- CN107190711B CN107190711B CN201710290583.XA CN201710290583A CN107190711B CN 107190711 B CN107190711 B CN 107190711B CN 201710290583 A CN201710290583 A CN 201710290583A CN 107190711 B CN107190711 B CN 107190711B
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- ladder
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- flaring gate
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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
Abstract
The present invention designs a kind of combined energy dissipater of suitable high moisture head and small flow flood-discharge energy-dissipating, belongs to hydraulic engineering flood-discharge energy-dissipating field.Including flaring gate pier, left side pier, middle pier, the right pier, ladder energy dissipating changeover portion, ladder energy dissipating uniform segment, aerator, inverted " V " word ladder, left side pier, middle pier and the right pier are located on dam body WES curved surface, flaring gate pier is equipped with below left side pier, middle pier and the right pier, the flaring gate pier is diffusion type flaring gate pier, aerator is equipped with below flaring gate pier, the aerator other end is connect with inverted " V " word ladder, inverted " V " word ladder top is divided into ladder energy dissipating changeover portion, lower part is divided into ladder energy dissipating uniform segment, and ladder energy dissipating changeover portion is in inverted " v " shape.Diffusion type flaring gate pier of the present invention is conducive to the diffusion, shock and its skyborne friction of water flow in the flood-discharge energy-dissipating of high moisture head and small flow；Inverted " V " word ladder energy dissipater optimizes flow-shape, reduces " water wing " height, easy for construction, save the cost.
Description
Technical field
The present invention relates to a kind of combined energy dissipaters of suitable high moisture head and small flow flood-discharge energy-dissipating, belong to hydraulic engineering flood discharge and disappear
It can field.
Background technique
Southwestern China River is abundant, abundant rainfall, is easy to the exploitation and construction of hydraulic engineering.However many river streams
It is but very big to measure smaller, flood discharge drop, hydraulic engineering intercepts river to downstream erosion damage still than more serious.Using energy dissipater into
Row dissipation and scouring, since head is high, flow is small, large-scale energy dissipater, effect of energy dissipation is good uneconomical；Small-sized energy dissipater, it is economical but
Effect is unobvious.And the energy dissipater of traditional flaring gate pier is contraction type, is increased instead in the flood-discharge energy-dissipating of high moisture head and small flow
Part washed away.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of combined energy dissipater of suitable high moisture head and small flow flood-discharge energy-dissipating,
Be conducive to the diffusion, shock and its skyborne friction of water flow using diffusion type flaring gate pier, inverted " V " word ladder energy dissipater optimizes water
Fluidised form is flowed, " water wing " height, easy for construction, save the cost are reduced.
The technical solution adopted by the present invention is that: a kind of combined energy dissipater of suitable high moisture head and small flow flood-discharge energy-dissipating, including
Flaring gate pier 1, left side pier 2, middle pier 3, the right pier 4, ladder energy dissipating changeover portion 5, ladder energy dissipating uniform segment 6, aerator 8, inverted " V " word
Ladder, left side pier 2, middle pier 3 and the right pier 4 are located on dam body WES curved surface, the lower section of left side pier 2, middle pier 3 and the right pier 4
It is equipped with flaring gate pier 1, the flaring gate pier 1 is diffusion type flaring gate pier, is equipped with aerator 8 below flaring gate pier 1, aerator 8 is another
End is connect with inverted " V " word ladder, and inverted " V " word ladder top is divided into ladder energy dissipating changeover portion 5, lower part is divided into ladder energy dissipating uniform segment
6, ladder energy dissipating changeover portion 5 is in inverted " v " shape；
The diffuser section of the flaring gate pier 1 is hexagonal, b1For the top width of diffuser section, b2For diffuser
The bottom width of section, B are diffuser section center width, the diffusion ratio b of middle 3 flaring gate pier of pier1/ B or b2/ B, which is respectively less than, is equal to 1/
3, the diffusion ratio b of 4 flaring gate pier of left side pier 2 and the right pier1/ B or b2/ B be greater than middle 3 flaring gate pier of pier diffusion ratio, but left side pier 2 and
The diffusion ratio b of 4 flaring gate pier of the right pier1/ B or b2/ B is less than or equal to 1/2, the top width b of diffuser section1And diffuser section
Bottom width b2It can require to be changed according to concrete engineering, when requiring flaring gate pier high stability, diffuser can be used
The top width b of section1It is wider than the bottom width b of diffuser section2；When requiring ladder energy dissipating high stability, expansion can be used
Dissipate the bottom width b of section section2It is wider than the top width b of diffuser section1。
Preferably, inverted " v " shape angle [alpha]=130 °~150 ° of the ladder energy dissipating changeover portion 5 and α from top to bottom by
Step reduces；Ladder energy dissipating uniform segment 6 is constant in the gradient, width.
The working principle of the invention is: water flow 7 flows through the inflow of dam body Overflow Section from reservoir, by the expansion of flaring gate pier 1
It dissipates and aerial shock disperses part energy, and pass through the further flip shot of aerator 8, aeration, reduce stepped spillway
The cavitation corrosion cavitation at place, and then flow into inverted " V " word ladder and carry out further energy dissipating.
The beneficial effects of the present invention are: traditional flaring gate pier is contraction type, it is anti-in the flood-discharge energy-dissipating of high moisture head and small flow
And increase and part washed away, and the present invention using diffusion type flaring gate pier be conducive to water flow diffusion, hit and its in the sky
Friction.Diffusion type flaring gate pier can reinforce water flow horizontal proliferation, be conducive to flow impact and friction, improve energy dissipation rate；Transition type
Inverted " V " word ladder energy dissipater optimizes flow-shape, reduces " water wing " height, easy for construction, save the cost；Diffusion type flaring gate pier and
Transition type inverted " V " word ladder energy dissipater combined energy dissipation economic security, the flood-discharge energy-dissipating that can satisfy high moisture head and small flow completely are wanted
It asks, can be worth being promoted in Southwestern China area high moisture head and small flow basin.
Detailed description of the invention
Fig. 1 is combined energy dissipater structural schematic diagram of the present invention；
Fig. 2 is the diffuser section structure diagram of diffusion type flaring gate pier of the present invention；
Fig. 3 is the left view of diffusion type flaring gate pier of the present invention；
Fig. 4 is the top view of Overflow Section of the present invention；
Fig. 5 is the top view of inverted " V " word ladder rank of the present invention；
Fig. 6 is the overall schematic of the invention used in waterwork dissipation and scouring.
Each label in Fig. 1-6: 1- flaring gate pier, the left side 2- pier, pier in 3-, pier on the right of 4-, 5- ladder energy dissipating changeover portion, 6- rank
Terraced energy dissipating uniform segment, 7- water flow, 8- aerator.
Specific embodiment
With reference to the accompanying drawings and detailed description, combined energy dissipater of the present invention is described further.
Embodiment 1: as shown in figures 1 to 6, a kind of combined energy dissipater of suitable high moisture head and small flow flood-discharge energy-dissipating, including wide tail
Pier 1, left side pier 2, middle pier 3, the right pier 4, ladder energy dissipating changeover portion 5, ladder energy dissipating uniform segment 6, aerator 8, inverted " V " word rank
Ladder, left side pier 2, middle pier 3 and the right pier 4 are located on dam body WES curved surface, and the lower section of left side pier 2, middle pier 3 and the right pier 4 is equal
Equipped with flaring gate pier 1, the flaring gate pier 1 is diffusion type flaring gate pier, is equipped with aerator 8,8 other end of aerator below flaring gate pier 1
It being connect with inverted " V " word ladder, inverted " V " word ladder top is divided into ladder energy dissipating changeover portion 5, lower part is divided into ladder energy dissipating uniform segment 6,
Ladder energy dissipating changeover portion 5 is in inverted " v " shape；
The diffuser section of the flaring gate pier 1 is hexagonal, b1For the top width of diffuser section, b2For diffuser
The bottom width of section, B are diffuser section center width, and the diffusion ratio b1/B or b2/B of middle 3 flaring gate pier of pier, which are respectively less than, to be equal to
1/3, it will affect its stabilization as diffusion ratio is excessive；Since dam body abutment pier is close to bank slope part, concrete dam abutment pier is relatively firm,
Therefore the diffusion ratio b1/B or b2/B of 4 flaring gate pier of left side pier 2 and the right pier can be suitably larger than the diffusion ratio of middle 3 flaring gate pier of pier, but
The diffusion ratio b of 4 flaring gate pier of left side pier 2 and the right pier1/ B or b2/ B is less than or equal to 1/2, the top width b of diffuser section1And expand
Dissipate the bottom width b of section section2It can require to be changed according to concrete engineering, when requiring flaring gate pier high stability, can adopt
With the top width b of diffuser section1It is wider than the bottom width b of diffuser section2(i.e. b1> b2)；When requiring ladder energy dissipating steady
When qualitative higher, the bottom width b of diffuser section can be used2It is wider than the top width b of diffuser section1(i.e. b2> b1).
Further, inverted " v " shape angle [alpha]=130 °~150 ° of the ladder energy dissipating changeover portion 5 and α is from top to bottom
It gradually reduces；Ladder energy dissipating uniform segment 6 is constant in the gradient, width.Since transition type ladder Energy Dissipation Modes are mainly by former section ranks
Ladder influences, and energy dissipation rate and construction economy is considered, using the transition type inverted " V " word ladder energy dissipater of angle changing form, angle
Spend α=130 °~150 °；Uniform ladder is constant in the gradient, width.
By state natural sciences fund (51569010) hydraulic model test, it can be seen that applying transition in ladder energy dissipating
Ladder energy dissipation rate increases, and wherein former section ladders to its obvious effect.Diffusion type flaring gate pier of the present invention
Hexagonal, transition type inverted " V " word ladder energy dissipater of the present invention, contains ladder energy dissipating changeover portion 5 and ladder energy dissipating is equal
Even section of 6 two parts, ladder energy dissipating changeover portion 5 are in inverted " v " shape, angle [alpha]=130 °~150 ° and α is gradually reduced from top to bottom；
Ladder energy dissipating uniform segment 6 is constant in the gradient, width, even variation.
Combined energy dissipater of the present invention is by diffusion type flaring gate pier and common group of word ladder energy dissipater of transition type inverted " V "
At applied in the flood-discharge energy-dissipating of high moisture head and small flow, diffusion type flaring gate pier can reinforce water flow horizontal proliferation, be conducive to water flow and hit
It hits and rubs, improve energy dissipation rate；Transition type inverted " V " word ladder energy dissipater optimizes flow-shape, reduces " water wing " height, construction party
Just, save the cost；Diffusion type flaring gate pier and transition type inverted " V " word ladder energy dissipater combined energy dissipation economic security, can expire completely
The flood-discharge energy-dissipating requirement of sufficient high moisture head and small flow, can be worth being promoted in Southwestern China area high moisture head and small flow basin.
For example:
The example power station 1: A Hai is disappeared using tradition Y type flaring gate pier+integrated Energy Dissipation Modes of Stepped Spillway+stilling pond
Can erosion control, when practical operation finds, the no prolonged ladder energy dissipating of aerator cause ladder seriously wash away, safety of dam body it is hidden
Suffer from.By consulting a large amount of technologic materials, the power station A Hai uses 5 hole aerial drainages, and chance crest discharge reaches 17500 m within 5000 one3/s、
Chance crest discharge reaches 15300 m within 1000 one3/ s, 100 years chance crest discharges reach 12200 m3/ s, it is big to belong to high water head
Flow power station.Discovery when carrying out the experiment of 1:60 hydraulic model to it, Y type flaring gate pier cause step negative pressure to add when shrinking water flow
Greatly, cavitation corrosion cavitation is serious, ladder energy dissipating using insufficient, while it has also been found that transition steps figure have to whole effect of energy dissipation it is larger
It influences.
By hydraulic model test as a result, carrying out the optimization on figure to it, while in order to guarantee the safe and reliable of dam body,
Combined energy dissipater scope of application control of the present invention is under high moisture head and small flow situation.Combined energy dissipater of the present invention (see
It Fig. 1) is made of diffusion type flaring gate pier (see Fig. 2, Fig. 3) and inverted " V " word ladder energy dissipater (see figure 5), diffusion type flaring gate pier will not
Step negative pressure is caused to increase, cavitation corrosion cavitation, inverted " V " word ladder makes the effect of energy dissipation of ladder be fully used, and increases and mix
Gas bank 8 thus effect of energy dissipation more preferably.
Specific embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned realities
Example is applied, it within the knowledge of a person skilled in the art, can also be without departing from the purpose of the present invention
Various changes can be made.
Claims (2)
1. a kind of combined energy dissipater of suitable high moisture head and small flow flood-discharge energy-dissipating, it is characterised in that: including flaring gate pier (1), the left side
Pier (2), middle pier (3), the right pier (4), ladder energy dissipating changeover portion (5), ladder energy dissipating uniform segment (6), aerator (8), inverted " V " word
Ladder, left side pier (2), middle pier (3) and the right pier (4) are located on dam body WES curved surface, left side pier (2), middle pier (3) and the right side
It is equipped with below abutment pier (4) flaring gate pier (1), the flaring gate pier (1) is diffusion type flaring gate pier, is equipped with below flaring gate pier (1)
Aerator (8), aerator (8) other end are connect with inverted " V " word ladder, and inverted " V " word ladder top is divided into ladder energy dissipating changeover portion
(5), lower part is divided into ladder energy dissipating uniform segment (6), and ladder energy dissipating changeover portion (5) is in inverted " v " shape；
The diffuser section of the flaring gate pier (1) is hexagonal, b1For the top width of diffuser section, b2It is disconnected for diffuser
The bottom width in face, B are diffuser section center width, the diffusion ratio b of middle pier (3) flaring gate pier1/ B or b2/ B, which is respectively less than, is equal to 1/
3, the diffusion ratio b of left side pier (2) and the right pier (4) flaring gate pier1/ B or b2/ B is greater than the diffusion ratio of middle pier (3) flaring gate pier, but the left side
The diffusion ratio b of pier (2) and the right pier (4) flaring gate pier1/ B or b2/ B is less than or equal to 1/2, the top width b of diffuser section1And expand
Dissipate the bottom width b of section section2It requires to be changed according to concrete engineering, when requiring flaring gate pier high stability, using expansion
Dissipate the top width b of section section1It is wider than the bottom width b of diffuser section2；When requiring ladder energy dissipating high stability, use
The bottom width b of diffuser section2It is wider than the top width b of diffuser section1。
2. a kind of combined energy dissipater of suitable high moisture head and small flow flood-discharge energy-dissipating according to claim 1, it is characterised in that:
Angle [alpha]=130 °~150 ° of the inverted " v " shape of the ladder energy dissipating changeover portion (5) and α is gradually reduced from top to bottom；Ladder
Energy dissipating uniform segment (6) is constant in the gradient, width.
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| CN111733768A (en) * | 2020-05-27 | 2020-10-02 | 长江水利委员会长江科学院 | Pier tail structure of double-line water delivery aqueduct |
| CN115045240A (en) * | 2022-07-12 | 2022-09-13 | 中铁十四局集团第二工程有限公司 | Weir flow energy dissipation structure and construction method |
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