CN109778800A - Bank type stilling pond is fallen in gradual change - Google Patents
Bank type stilling pond is fallen in gradual change Download PDFInfo
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- CN109778800A CN109778800A CN201910102866.6A CN201910102866A CN109778800A CN 109778800 A CN109778800 A CN 109778800A CN 201910102866 A CN201910102866 A CN 201910102866A CN 109778800 A CN109778800 A CN 109778800A
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Abstract
The present invention provides a kind of novel gradual change and falls bank type stilling pond, it is connected anti-slope section, stilling pond main paragraph, stilling pond end sill counter-slope section by the water conservancy diversion successively to connect along water (flow) direction to constitute, water conservancy diversion linking slope section is connected with upstream release floodwatering facility, for water flow water conservancy diversion to be entered stilling pond, bank is fallen in the joining place setting of water conservancy diversion linking slope section and stilling pond main paragraph, stilling pond main paragraph bottom plate is the curved surface (indent is directed to sink other than stilling pond water body) to concave, so that the height that stilling pond falls bank to intermediate symmetry is gradually increased from two sides.The stilling pond can effectively improve energy dissipation rate, and bottom water mechanical index is faced in reduction, reach the protection works for reducing and even cancelling stilling pond downstream river course bank slope, save the purpose of construction fund.
Description
Technical field
The invention belongs to flood-discharge energy-dissipating facility fields, in particular to stilling pond used in hydraulic and hydroelectric engineering.
Background technique
In hydraulic and hydroelectric engineering, flood-discharge energy-dissipating is key technical problem very outstanding, and discharge structure downstream disappears
Energy erosion control is directly related to the safety of engineering.According to the rough Statistics to a large amount of Practical Project data analysis shows that, flood-discharge energy-dissipating
Cost accounts for about the 40%~50% of project total cost, and the expense of dissipation and scouring facility account for 40% in discharge structure~
50%.Therefore, it selects suitable flood releasing structure or rationally utilizes the important channel of fund.In many middle low head hydropower stations
In, stilling pond energy dissipating is often used as a kind of effective measures of downstream dissipator of energy.Since the construction of stilling pond is not by landform and ground
The limitation of the conditions such as matter, and overhaul more convenient, it there is no atomizating phenomenon relative to trajectory bucket type energy.Therefore, now
The middle high-head power station for being completed and building, falls bank type stilling pond energy dissipating and is widely used.But for big single
Wide flow, the energy dissipation rate of stilling pond be generally not it is very high, water stream still includes a large amount of complementary energy out, causes lower reaches of river water surface wave
It is dynamic to propagate great distances, increase the protection engineering of stilling pond downstream river course bank slope.It is therefore desirable to design one kind and can improve to disappear
Energy rate, and the novel stilling pond of pond water flow fluctuation out can be reduced.
Summary of the invention
The purpose of the present invention is to provide a kind of novel gradual changes to fall bank type stilling pond, high speed when being suitable for power station flood discharge
The energy dissipation by hydraulic jump of water flow effectively improves energy dissipation rate, and bottom water mechanical index is faced in reduction, reaches reduction and even cancels stilling pond downstream river
The protection works of road bank slope save the purpose of construction fund.
Bank type stilling pond is fallen in novel gradual change provided by the invention, and the flood discharge generally as middle low water head lock dam-type power plant disappears
Energy facility falls bank the main idea of the present invention is stilling pond and changes traditional vertical descending manner, but in the lateral (water flow of stilling pond
Vertical direction) gradually drop formula.
Bank type stilling pond is fallen in gradual change of the present invention, is connected anti-slope section by the water conservancy diversion successively to connect along water (flow) direction, disappears
Power tank main body section, stilling pond end sill counter-slope section are constituted, and water conservancy diversion linking slope section is connected with upstream release floodwatering facility, for leading water flow
Stream enters stilling pond, and bank is fallen in the joining place setting of water conservancy diversion linking slope section and stilling pond main paragraph, and stilling pond main paragraph bottom plate is
The curved surface (indent be directed to stilling pond water body other than sink) to concave, so that stilling pond falls the height of bank from two sides into
Between be symmetrically gradually increased.
Further, stilling pond main paragraph is not provided with falling bank (end sill) with being connected for stilling pond end sill counter-slope section, directly sets
Counter-slope section is set, to take into account dissipation and scouring and sand discharge when being suitable for certain heavily silt-carrying rivers, prevent the mud that largely deposits in stilling pond
Husky and force reduction pool bottom ablation destruction, causes the function of stilling pond to lose.
Further, the stilling pond, wherein water conservancy diversion is connected slope section gradient i1=h1/l1=1:8~1:4, h1For water conservancy diversion
It is connected slope section vertical height, l1It is connected slope section horizontal length for water conservancy diversion；
Further, stilling pond main paragraph width be B, length L, curved surface bottom plate sagitta be d, peripheral wall height h, wherein
L/B=1.0~2.0, d/B=0.04~0.1, peripheral wall height will guarantee in stilling pond to be not in turn over water phenomenon；
Further, stilling pond end sill counter-slope section gradient i2=h2/l2=1:4~1:2, h2It is vertically high for end sill counter-slope section
Degree, l2For end sill counter-slope section horizontal length.
Further, the stilling pond main paragraph can be divided into following two figure according to floor structure form:
The first: the bottom plate of stilling pond main paragraph is Cylinder Surface, and stilling pond two sides abutment wall is Cylinder Surface arc wall, cylinder
The height of Curved arc wall is h, sagitta b, and two sides abutment wall is connected with force reduction pool bottom tangent (inscribe).
Second: the stilling pond main paragraph bottom plate is semiellipse curved surface of column (half divided with transverse), and disappear power
Pond two sides abutment wall is vertical abutment wall, and side height is h, the curved surface bottom plate with two sides abutment wall is tangent is connected.
In above technical scheme, further, the stilling pond end sill counter-slope section bottom plate is inner concave type curve (in the present invention
Inner sunken face is sagging curved surface, and inner sunken face refers to that the normal direction normal direction of curved surface apex is downward, external convex type curve apex
Normal direction is upward, i.e., usually said sink and swell), curved surface bottom plate sagitta is that (sagitta with stilling pond main body bottom plate is phase to d
Deng preferably identical as stilling pond main body bottom plate curvature), bottom plate two sides abutment wall is vertical abutment wall.
In above technical scheme, further, apron, the apron bottom plate is arranged in the stilling pond end sill counter-slope section downstream
Preferably inner concave type curve, the apron downstream are connected riverbed.
The invention has the following advantages:
1, under identical working condition compared with existing stilling pond, bank type stilling pond is fallen in gradual change of the present invention
Energy dissipation rate increases substantially, and fluidised form is good in stilling pond, out pond waterflow stabilization, and downstream river course water level fluctuation is small, shortens river bank
Slope protection scope, it might even be possible to protection is not set, using nature bank slope.The design of end sill counter-slope can prevent certain silt simultaneously
Siltation, therefore can be used as main energy dissipater in medium head hydropower station.
2, since what bank type stilling pond was fallen in gradual change of the present invention falls bank gradual change, this just makes to be formed into water stream vertical
Current gradient, left and right sides water flow deflect to centre and collide with intermediate mainstream and consume big energy, simultaneously because
Bottom plate is inner concave type curve, and stilling pond is interior, and there is also a degree of directional transverse circulation, and the water flow in stilling pond to be made to become flat
Surely.End sill counter-slope section and apron bottom plate are inner concave type curve bottom plate, also will be close to bank while reducing pond water flow fluctuation out
Among the current deflecting river on side, alleviates tail water fluctuation and bank slope is washed away.
3, gradual change of the present invention falls the water flow in bank type stilling pond there are the three-dimensional whirlpool of various scales, water in stilling pond
Stream aeration is strong, and turbulent fluctuation is strong, therefore effect of energy dissipation is preferable.
4, bank type stilling pond is fallen in gradual change of the present invention, and structure is relatively easy, and bodily form optimization is easy, and overhauls replacement side
Just.
Detailed description of the invention
Fig. 1 is the floor map that bank type stilling pond (Cylinder Surface bottom board type) is fallen in gradual change of the present invention,
Energy dissipation by hydraulic jump for middle water head power station；
Fig. 2 is the I-I sectional view of Fig. 1；
Fig. 3 is the II-II sectional view of Fig. 1；
Fig. 4 is the III-III sectional view of Fig. 1；
Fig. 5 is the IV-IV sectional view of Fig. 1；
Fig. 6 is the V-V sectional view of Fig. 1；
Fig. 7 is the VI-VI sectional view of Fig. 1；
Fig. 8 is the I-I section fluidised form schematic diagram that bank type stilling pond (Cylinder Surface bottom board type) is fallen in gradual change；
Fig. 9 is the III-III section fluidised form schematic diagram that bank type stilling pond (Cylinder Surface bottom board type) is fallen in gradual change；
Figure 10 is that bank type stilling pond floor map (semiellipse curved surface of column bottom board type) is fallen in gradual change of the present invention, is used for
The energy dissipation by hydraulic jump of water head power station；
Figure 11 is the VII-VII sectional view of Figure 10；
Figure 12 is the VII-VII section fluidised form schematic diagram that bank type stilling pond (semiellipse curved surface of column bottom board type) is fallen in gradual change；
Figure 13 is the plane fluidised form figure that bank type stilling pond (Cylinder Surface bottom board type) is fallen in gradual change in embodiment 1.
Figure 14 is the plane fluidised form figure that bank type stilling pond (semiellipse curved surface of column bottom board type) is fallen in gradual change in embodiment 2.
In figure, bank type stilling pond main paragraph curved surface bottom plate, 3-stilling pond masters are fallen in 1-water conservancy diversion linking slope section, 2-gradual changes
Body section abutment wall, 4-stilling pond end sill counter-slope sections, 5-aprons, 6-river riverbeds.
Specific embodiment
Fall bank type stilling pond to gradual change of the present invention below by specific embodiment to be described further.
Embodiment 1
Gradual change in the implementation case falls bank type stilling pond (Cylinder Surface bottom board type) and is used for middle head lock dam-type power plant,
Head 30m before lock, maximum discharge per unit width are q=100m3/s.m.Gradual change falls bank type stilling pond structure as shown in figs 1-9, by along water
The water conservancy diversion that stream direction successively connects is connected anti-slope section, stilling pond main paragraph, stilling pond end sill counter-slope section and constitutes, and water conservancy diversion linking is oblique
Slope section is connected with upstream release floodwatering facility, and for water flow water conservancy diversion to be entered stilling pond, water conservancy diversion is connected slope section and stilling pond main paragraph
Joining place setting fall bank, stilling pond main paragraph bottom plate is that (indent is directed to other than stilling pond water body for the curved surface that concaves
It sink) so that the height that stilling pond falls bank to intermediate symmetry is gradually increased from two sides.Wherein, stilling pond main paragraph and the power that disappears
The linking of pond end sill counter-slope section is not provided with falling bank (end sill), and directly setting counter-slope section prevents to take into account dissipation and scouring and sand discharge
A large amount of shoal materials and force reduction pool bottom ablation destruction, cause the function of stilling pond to lose in stilling pond.
The stilling pond is made by armored concrete completely, and water conservancy diversion is connected slope section gradient i1=h1/l1=1:8, water conservancy diversion rank
Meet slope section horizontal length l1=16m, water conservancy diversion are connected slope section vertical height h1=2m；Stilling pond main paragraph bottom plate is that cylinder is bent
Face, stilling pond main paragraph width B=50m, length L=50m, curved surface bottom plate sagitta d=2.0m, the height of Cylinder Surface arc wall
H=8m, sagitta b=3.41m；Stilling pond end sill counter-slope section gradient i2=h2/l2=1:2, end sill counter-slope section horizontal length l2=
6m, end sill counter-slope section vertical height h2=3m, end sill bottom plate are inner concave type curve, curved surface bottom plate sagitta d=2.0m, two sides abutment wall
For stalk；Water stream connects by an inner concave type curve bottom plate apron with natural stream channel out.
The energy dissipation rate that bank type stilling pond is fallen in gradual change in the implementation case is about 65~70%.It is to flood water in stilling pond
Jump, fluidised form is relatively stable, and a large amount of aerations in stilling pond, flow turbulence is strong, out the fluctuation very little of water stream, close to bank
Water flow is directed among river, is alleviated tail water fluctuation and is washed away to bank slope, can shorten river bank slope protection scope, it might even be possible to
Protection is not set, using nature bank slope.The design of end sill counter-slope can prevent certain sediment siltation simultaneously, therefore in middle head water
It can be used as main energy dissipater in power station.Its plane fluidised form schematic diagram is as shown in figure 13.
Comparative example 1
Existing conventional stilling pond, compared with Example 1, the main distinction are as follows: step height is lateral are set under identical operating condition
Equal everywhere, stilling pond floor is plane floor.
The energy dissipation rate of the stilling pond of comparative example is about 45-50%, and water stream still includes a large amount of complementary energy out, is caused under river
It swims water level fluctuation and propagates great distances, need to increase the protection engineering of stilling pond downstream river course bank slope.
Embodiment 2
Gradual change in the implementation case falls bank type stilling pond (Cylinder Surface bottom board type) and is used for middle head lock dam-type power plant,
Head 50m before dam, maximum discharge per unit width are q=200m3/s.m.With stilling pond described in embodiment 1 the difference is that:
Water conservancy diversion is connected slope section gradient i1=h1/l1=1:4, water conservancy diversion are connected slope section horizontal length l1=16m, water conservancy diversion rank
Meet slope section vertical height h1=4m；Stilling pond main paragraph bottom plate is Cylinder Surface, stilling pond main paragraph width B=30m, length
For L=60m, curved surface bottom plate sagitta d=3.0m, the height h=8m of Cylinder Surface arc wall, sagitta b=3.11m；Stilling pond end sill
Counter-slope section gradient i2=h2/l2=1:4, end sill counter-slope section horizontal length l2=20m, end sill counter-slope section vertical height h2=5m, tail
Bank bottom plate is also inner concave type curve as stilling pond main paragraph bottom plate, and curved surface bottom plate sagitta d=3.0m, two sides abutment wall is straight
Wall；Water stream connects by an inner concave type curve bottom plate apron with natural stream channel out.
The energy dissipation rate that bank type stilling pond is fallen in gradual change in the implementation case is about 70~75%.It is to flood water in stilling pond
Jump, fluidised form is relatively stable, and a large amount of aerations in stilling pond, flow turbulence is strong, and the water flow close to bank is directed among river, subtracts
Bank slope is washed away in light tail water fluctuation, reduces the range for needing to be protected bank slope, saves a large amount of construction fund,
There is seldom sediment siltation in stilling pond simultaneously, sand-flash effect is good.Its plane fluidised form schematic diagram is as shown in figure 13.
Embodiment 3
Gradual change in the implementation case falls bank type stilling pond (semiellipse curved surface of column bottom board type) and overflows for medium head hydropower station
The energy dissipation by hydraulic jump of big vast road outlet, highest operating head polishing are 80m, and width of spillway=20m, maximum discharge per unit width is q=80m3/
s.m.It is connected anti-slope section, stilling pond main paragraph, stilling pond end sill counter-slope section by the water conservancy diversion successively to connect along water (flow) direction to constitute,
Water conservancy diversion linking slope section is connected with upstream release floodwatering facility, and for water flow water conservancy diversion to be entered stilling pond, water conservancy diversion is connected slope section and disappears
Bank is fallen in the joining place setting of power tank main body section, and stilling pond main paragraph bottom plate is that (indent is directed to the power that disappears for the curved surface that concaves
It sink other than water body) so that the height that stilling pond falls bank to intermediate symmetry is gradually increased from two sides.Wherein, stilling pond master
Body section is not provided with falling bank (end sill) with being connected for stilling pond end sill counter-slope section, directly setting counter-slope section, to take into account dissipation and scouring
With sand discharge, a large amount of shoal materials and force reduction pool bottom ablation destruction in stilling pond are prevented, the function of stilling pond is caused to lose.
Water conservancy diversion is connected slope section gradient i1=h1/l1=1:6, water conservancy diversion is connected slope section horizontal length l1=18m, water conservancy diversion rank
Meet slope section vertical height h1=3m；Stilling pond main paragraph bottom plate be semiellipse curved surface of column, stilling pond main paragraph width B=20m,
Length is L=40m, curved surface bottom plate sagitta d=2.0m, the height h=8m of Cylinder Surface arc wall；The stilling pond end sill counter-slope section gradient
i2=h2/l2=1:2, end sill counter-slope section horizontal length l2=8m, end sill counter-slope section vertical height h2=4m, end sill bottom plate and the power that disappears
Tank main body section bottom plate is equally also inner concave type curve, and curved surface bottom plate sagitta d=2.0m, two sides abutment wall is stalk；Water flows through out
An inner concave type curve bottom plate apron is crossed to connect with natural stream channel.
The energy dissipation rate that bank type stilling pond is fallen in gradual change in the implementation case is about 60%.It is submerged hydraulic jump in stilling pond, disappears
A large amount of aerations in power pond, flow turbulence is strong, out pond water flow stationary, will not wash away opposite bank side slope.Its plane fluidised form schematic diagram is such as
Shown in Figure 14.
Claims (10)
1. bank type stilling pond is fallen in gradual change, which is characterized in that structure includes the water conservancy diversion linking backslash slope successively to connect along water (flow) direction
Section, stilling pond main paragraph, stilling pond end sill counter-slope section, water conservancy diversion linking slope section are connected with upstream release floodwatering facility, and water conservancy diversion linking is oblique
Bank is fallen in slope section and the joining place setting of stilling pond main paragraph, and stilling pond main paragraph bottom plate is the curved surface to concave, so that stilling pond
The height for falling bank to intermediate symmetry is gradually increased from two sides.
2. bank type stilling pond is fallen in gradual change according to claim 1, which is characterized in that water conservancy diversion is connected slope section gradient i1=h1/l1
=1:8~1:4, h1It is connected slope section vertical height, l for water conservancy diversion1It is connected slope section horizontal length for water conservancy diversion.
3. bank type stilling pond is fallen in gradual change according to claim 2, which is characterized in that stilling pond main paragraph width is B, and length is
L, curved surface bottom plate sagitta are d, peripheral wall height h, wherein L/B=1.0~2.0, d/B=0.04~0.1.
4. bank type stilling pond is fallen in gradual change according to claim 3, which is characterized in that stilling pond end sill counter-slope section gradient i2=h2/
l2=1:4~1:2, h2For end sill counter-slope section vertical height, l2For end sill counter-slope section horizontal length.
5. bank type stilling pond is fallen in gradual change described in any claim in -4 according to claim 1, which is characterized in that the stilling pond
The bottom plate of main paragraph is Cylinder Surface, and stilling pond two sides abutment wall is Cylinder Surface arc wall, and the height of Cylinder Surface arc wall is h, arch
A height of b, and two sides abutment wall with force reduction pool bottom is tangent is connected.
6. bank type stilling pond is fallen in gradual change described in any claim in -4 according to claim 1, which is characterized in that the stilling pond
Main paragraph bottom plate is semiellipse curved surface of column, and stilling pond two sides abutment wall is vertical abutment wall, and side height is h, the curved surface bottom plate and two
The tangent linking of side wall.
7. bank type stilling pond is fallen in gradual change according to claim 5, which is characterized in that the stilling pond end sill counter-slope section bottom plate is
Inner concave type curve, curved surface bottom plate sagitta are d, and bottom plate two sides abutment wall is stalk.
8. bank type stilling pond is fallen in gradual change according to claim 6, which is characterized in that the stilling pond end sill counter-slope section bottom plate is
Inner concave type curve, curved surface bottom plate sagitta are d, and bottom plate two sides abutment wall is stalk.
9. bank type stilling pond is fallen in gradual change according to claim 5, which is characterized in that the stilling pond end sill counter-slope section and downstream
Apron linking, the apron bottom plate are set as inner concave type curve, and the apron downstream is connected riverbed.
10. bank type stilling pond is fallen in gradual change according to claim 6, which is characterized in that the stilling pond end sill counter-slope section is under
Apron linking is swum, the apron bottom plate is set as inner concave type curve, and the apron downstream is connected riverbed.
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| CN201910102866.6A CN109778800B (en) | 2019-02-01 | 2019-02-01 | Gradual change falls sill type stilling basin |
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| CN201910102866.6A CN109778800B (en) | 2019-02-01 | 2019-02-01 | Gradual change falls sill type stilling basin |
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| CN109778800B CN109778800B (en) | 2020-04-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110541409A (en) * | 2019-09-02 | 2019-12-06 | 中国电建集团贵阳勘测设计研究院有限公司 | Utilize rivers effect to arrange by oneself and lead novel pond structure that disappears of grit in pond |
| CN113718727A (en) * | 2021-09-07 | 2021-11-30 | 中国电建集团昆明勘测设计研究院有限公司 | Sudden expansion and falling sill absorption basin suitable for large single wide discharge of high water head |
| CN114718029A (en) * | 2022-01-14 | 2022-07-08 | 中铁十四局集团第二工程有限公司 | Inner groove stilling pool structure for water flow energy dissipation |
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| CN106948319A (en) * | 2017-05-08 | 2017-07-14 | 中国水利水电科学研究院 | A kind of fluted non-horizontal base plate of band falls energy dissipater and the method for bank stiling basin |
| CN109098155A (en) * | 2018-09-19 | 2018-12-28 | 华北水利水电大学 | Hydraulic engineering curved surface energy dissipating wall |
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| CN101302750A (en) * | 2008-06-10 | 2008-11-12 | 天津大学 | Non-uniform flexible anchoring baffle pond inverted arch bottom plate structure |
| CN106948319A (en) * | 2017-05-08 | 2017-07-14 | 中国水利水电科学研究院 | A kind of fluted non-horizontal base plate of band falls energy dissipater and the method for bank stiling basin |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110541409A (en) * | 2019-09-02 | 2019-12-06 | 中国电建集团贵阳勘测设计研究院有限公司 | Utilize rivers effect to arrange by oneself and lead novel pond structure that disappears of grit in pond |
| CN110541409B (en) * | 2019-09-02 | 2024-03-26 | 中国电建集团贵阳勘测设计研究院有限公司 | Novel stilling pool structure for automatically discharging sand and stone in guide pool by utilizing water flow effect |
| CN113718727A (en) * | 2021-09-07 | 2021-11-30 | 中国电建集团昆明勘测设计研究院有限公司 | Sudden expansion and falling sill absorption basin suitable for large single wide discharge of high water head |
| CN114718029A (en) * | 2022-01-14 | 2022-07-08 | 中铁十四局集团第二工程有限公司 | Inner groove stilling pool structure for water flow energy dissipation |
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