CN106368186B - It passes the flood period the choosing of the breach flow, down stream energy-dissipating structure for gravity dam bank - Google Patents
It passes the flood period the choosing of the breach flow, down stream energy-dissipating structure for gravity dam bank Download PDFInfo
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- CN106368186B CN106368186B CN201610994532.0A CN201610994532A CN106368186B CN 106368186 B CN106368186 B CN 106368186B CN 201610994532 A CN201610994532 A CN 201610994532A CN 106368186 B CN106368186 B CN 106368186B
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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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Abstract
It passes the flood period the choosing of the breach flow, down stream energy-dissipating structure for gravity dam bank the invention discloses a kind of, bank notch is arranged in close on the monolith on side riverbank, in bank notch downstream, cushion pool is set, the side of cushion pool is bank slope, bank platform is arranged in the top of bank slope, it leads wall and is arranged on the platform of bank in bank, and it is connected with bank Nick End, bank platform is connected by bank slope with cushion pool, dividing pier be arranged in the other side of the bank bank notch that lead wall opposite, for preventing flow in notch from turning up.The radius that wall is led on the bank is 4H~6H, and it is 2H~4H that wall length is led on bank, is highly more than 0.4H, and the angle of cut for leading wall end and bank slope is 5 °~15 °；The bank slope gradient is more than 1:0.3；The cushion pool depth of water is more than 0.2 Δ Z；H is that highest is passed the flood period the difference of water level and notch floor elevation, and Δ Z is to design upstream and downstream water-head.Riding track is not provided on bank slope.Effect of energy dissipation is good, and flow-shape is good, no reflexion and scour flow phenomenon, without concentrate impact phenomenon.Mainstream does not wash away bank slope, and inshore current velocity is small.It is cheap for conventional concrete.
Description
Technical field
The devices for dissipation of energy that the invention belongs to be used in hydraulic and hydroelectric engineering, more particularly to it is a kind of to pass the flood period for gravity dam bank
The energy-dissipating structure of the breach flow.
Background technology
Gravity dam is generally required in the construction time in the reserved notch of passing the flood period of dam body, so that Flood is by the breach flow, thus
Reaching reduces reservoir level, ensures to have poured the purpose of monolith is safe.The bank that dam body future insufficiency may be arranged at dam both sides is non-
Overflow Section, the benefit being arranged so have：Non-overflow section of dam is simple in structure, can restore rapidly to construct after flood；During flood season overcurrent,
The sustainable progress of the work such as Metal structure installation, the concreting of Overflow Section；Save the dam construction duration.The disadvantage is that mistake
Flow gap is close to bank, and flow-shape is complicated, energy dissipating is insufficient, flow easily causes to wash away to bank slope.
Invention content
Simple, energy dissipating that the technical problem to be solved by the invention is to provide fluidised forms when a kind of overcurrent is adequately used for gravity
Dam bank is passed the flood period the choosing of the breach flow, down stream energy-dissipating structure.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：One kind is passed the flood period scarce for gravity dam bank
Make a slip of the tongue the choosing of stream, down stream energy-dissipating structure, including bank notch, bank leads wall, bank platform, bank slope, cushion pool and dividing pier, bank
Notch is arranged in close on the monolith on side riverbank, cushion pool is arranged in bank notch downstream, the side of cushion pool is bank slope, bank
Bank platform is arranged in the top on slope, and bank is led wall and is arranged on the platform of bank, and is connected with bank Nick End, and bank platform is logical
Bank slope is crossed with cushion pool to be connected, dividing pier be arranged in the other side of the bank bank notch that lead wall opposite, for preventing in notch
Flow is turned up.
The radius that wall is led on the bank is 4H~6H, and it is 2H~4H that wall length is led on bank, is highly more than 0.4H, leads wall end
The angle of cut with bank slope is 5 °~15 °；The bank slope gradient is more than 1:0.3；The cushion pool depth of water is more than 0.2 Δ Z；H is that highest is passed the flood period water level
And the difference of notch floor elevation, Δ Z are design upstream and downstream water-head.
It is not provided with riding track on the bank slope.
The beneficial effects of the invention are as follows：Effect of energy dissipation is good, and flow-shape is good, and no reflexion and scour flow phenomenon is impacted now without concentration
As.Mainstream does not wash away bank slope, and inshore current velocity is small.Making material is conventional concrete, cheap.It is simple in structure, convenient for making.
Without digging on a large scale, embankment, it is easy for construction.
Description of the drawings
Fig. 1 is the present invention to pass the flood period the choosing of the breach flow, the structural plan figure of down stream energy-dissipating structure for gravity dam bank；
Fig. 2 is the A-A sectional views of Fig. 1；
Fig. 3 is the B-B sectional views of Fig. 1；
Fig. 4 is the C-C sectional views of Fig. 1；
Fig. 5 is specific embodiment attached drawing.
In figure, 1-bank notch, 2-banks lead wall, 3-bank platforms, 4-bank slopes, 5-cushion pools, 6-dividing piers.
Specific implementation mode
Invention is further described in detail with reference to the accompanying drawings and detailed description：
As shown in Figs 1-4, of the invention to pass the flood period the choosing of the breach flow, down stream energy-dissipating structure for gravity dam bank, including
Bank notch 1, bank lead wall 2, bank platform 3, bank slope 4, cushion pool 5 and dividing pier 6, and bank notch 1 is arranged in close to side river
On the monolith of bank, on bank, cushion pool 5 is arranged in 1 downstream of notch, and the side of cushion pool 5 is bank slope 4, and bank is arranged in the top of bank slope 4
Side platform 3, bank are led wall 2 and are arranged on bank platform 3, and are connected with 1 end of bank notch, bank platform 3 by bank slope 4 with
Cushion pool 5 is connected, dividing pier 6 be arranged in the other side of the bank bank notch 1 that lead wall 2 opposite, for preventing flow in notch
It turns up.
It is preferred that the radius that wall 2 is led on the bank is 4H~6H, it is 2H~4H that wall length is led on bank, is highly more than 0.4H, leads
The angle of cut of wall end and bank slope is 5 °~15 °；4 gradient of bank slope is more than 1:0.3；The cushion pool depth of water is more than 0.2 Δ Z；H is topnotch
The difference of flood water level and notch floor elevation, Δ Z are design upstream and downstream water-head.
It is not provided with riding track on the bank slope 4.
The present invention is led wall, bank slope and cushion pool size to bank and has been carried out preferably using experiment and theoretical analysis method.Bank
The elevation and width of side notch are generally determined according to engineering practice by water force, present invention assumes that designing water in notch
It is Δ Z that the head difference of water level and notch floor elevation (highest pass the flood period), which be H, designs upstream and downstream water-head, then it is preferred after bank lead
Wall radius is 4H~6H, and it is 2H~4H that wall length is led on bank, and the angle of cut for leading wall end and bank slope is 5 °~15 °, leads wall thickness not
Less than 1m, highly it is more than 0.4H；The bank slope gradient is more than 1:0.3, bank slope is without riding track；Plunge pool floor elevation passes through the cushion pool depth of water
It determines, the cushion pool depth of water is more than 0.2 Δ Z.The present invention makes of conventional concrete.
The operation principle of " for the choosing of gravity dam bank the breach flow, down stream energy-dissipating structure " of the present invention is：1)
Wall is led by bank, the part flow flip shot for using notch enters cushion pool, and flow is made to disperse energy dissipating；2) go out the flow of notch with
The form of down stream enters cushion pool, passes through down stream energy dissipation by hydraulic jump；3) because bank slope is without riding track, flow does not liquidate bank slope, and by mainstream
It is oriented to cushion pool, to achieve the purpose that protect bank slope.
As shown in figure 5, engineering where the present embodiment is located at Lancang River mainstream, notch of passing the flood period is arranged in dam right bank, notch
Design vent flow is 3924m3/ s, highest pass the flood period water level as 1456m, and the corresponding level of tail water is 1415m, upstream and downstream water-head
Δ Z=41m, design head H=26m in notch.To solve the problems, such as bank the breach flow dissipation and scouring, intend using of the present invention
" for the choosing of gravity dam bank the breach flow, down stream energy dissipater " carries out energy dissipating, as follows in relation to size：Notch bottom elevation
1430m, width 40m, the dividing pier and non-overflow section of dam crest level of notch both sides are 1481m, and right bank bank platform height is 1430m,
Plunge pool floor elevation 1400m, it is 120m, long 72m, thickness 1m, high 11m, the high 30m of bank slope, the gradient 1 that wall radius is led on bank:
0.23。
The present invention has the following effects that：
1, effect of energy dissipation is good.In embodiment, when upstream and downstream water-head is 26m, flow 3924m3When/s, go out water cushion
Pool flow velocity is only 7.7m/s, energy dissipation rate 89.2%.
2, flow-shape is good.Experiments have shown that under the operating condition described in embodiment, flow is dispersed into cushion pool, no folding
Wash by water flow phenomenon, without concentrate impact phenomenon.
3, mainstream does not wash away bank slope, and inshore current velocity is small.Under the operating condition described in embodiment, the inshore current velocity after cushion pool
Less than 7m/s.
4, making material is conventional concrete, cheap.
5, simple in structure, convenient for making.
6, it is not necessarily to extensive digging, embankment, it is easy for construction.
Embodiment described above is merely to illustrate the technological thought and feature of the present invention, in the art its object is to make
Technical staff it will be appreciated that present disclosure and implement according to this, the patent model of the present invention cannot be only limited with the present embodiment
It encloses, i.e., same changes or modifications made by all disclosed spirit, still falls in the scope of the claims of the present invention.
Claims (2)
1. a kind of pass the flood period the choosing of the breach flow, down stream energy-dissipating structure for gravity dam bank, which is characterized in that including bank notch
(1), wall (2), bank platform (3), bank slope (4), cushion pool (5) and dividing pier (6) are led in bank, bank notch (1) be arranged in close to
On the monolith on side riverbank, notch (1) downstream setting cushion pool (5) on bank, the side of cushion pool (5) is bank slope (4), bank slope
(4) top setting bank platform (3), bank leads wall (2) and is arranged on bank platform (3), and with bank notch (1) end phase
Even, bank platform (3) is connected by bank slope (4) with cushion pool (5), and dividing pier (6) is arranged in leads the opposite bank of wall (2) with bank
The other side of notch (1), for preventing flow in notch from turning up；The radius that wall (2) is led on bank is 4H~6H, and wall length is led on bank
For 2H~4H, highly it is more than 0.4H, the angle of cut for leading wall end and bank slope is 5 °~15 °；Bank slope (4) gradient is more than 1:0.3；Water cushion
The pool depth of water is more than 0.2 Δ Z；H is that highest is passed the flood period the difference of water level and notch floor elevation, and Δ Z is to design upstream and downstream water-head.
2. being used to gravity dam bank according to claim 1 pass the flood period the choosing of the breach flow, down stream energy-dissipating structure, feature exists
In being not provided with riding track on the bank slope (4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610994532.0A CN106368186B (en) | 2016-11-11 | 2016-11-11 | It passes the flood period the choosing of the breach flow, down stream energy-dissipating structure for gravity dam bank |
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|---|---|---|---|
| CN201610994532.0A CN106368186B (en) | 2016-11-11 | 2016-11-11 | It passes the flood period the choosing of the breach flow, down stream energy-dissipating structure for gravity dam bank |
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| CN106368186A CN106368186A (en) | 2017-02-01 |
| CN106368186B true CN106368186B (en) | 2018-08-17 |
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| CN111733779B (en) * | 2020-06-12 | 2021-08-17 | 中国长江电力股份有限公司 | Gravity self-balancing telescopic platform for large-gradient runner maintenance of hydropower station and use method |
| CN115726330A (en) * | 2022-11-29 | 2023-03-03 | 四川大学 | Bow-shaped internally-tangent aerator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU979573A1 (en) * | 1981-07-20 | 1982-12-07 | Всесоюзный Ордена Ленина Проектно-Изыскательский И Научно-Исследовательский Институт "Гидропроект" Им.С.Я.Жука | Toe basin |
| CN102966081A (en) * | 2012-11-13 | 2013-03-13 | 中国长江三峡集团公司 | Biological environment-friendly expansion-drop combination energy dissipater |
| CN103821112A (en) * | 2014-01-17 | 2014-05-28 | 四川大学 | Lateral on-way outflow shore spillway |
| CN104404925A (en) * | 2014-10-08 | 2015-03-11 | 四川大学 | Porous inflow hedging energy dissipation structure of hydraulic structure |
| CN206220066U (en) * | 2016-11-11 | 2017-06-06 | 中国电建集团北京勘测设计研究院有限公司 | Passed the flood period the choosing of the breach flow, down stream energy-dissipating structure for gravity dam bank |
-
2016
- 2016-11-11 CN CN201610994532.0A patent/CN106368186B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU979573A1 (en) * | 1981-07-20 | 1982-12-07 | Всесоюзный Ордена Ленина Проектно-Изыскательский И Научно-Исследовательский Институт "Гидропроект" Им.С.Я.Жука | Toe basin |
| CN102966081A (en) * | 2012-11-13 | 2013-03-13 | 中国长江三峡集团公司 | Biological environment-friendly expansion-drop combination energy dissipater |
| CN103821112A (en) * | 2014-01-17 | 2014-05-28 | 四川大学 | Lateral on-way outflow shore spillway |
| CN104404925A (en) * | 2014-10-08 | 2015-03-11 | 四川大学 | Porous inflow hedging energy dissipation structure of hydraulic structure |
| CN206220066U (en) * | 2016-11-11 | 2017-06-06 | 中国电建集团北京勘测设计研究院有限公司 | Passed the flood period the choosing of the breach flow, down stream energy-dissipating structure for gravity dam bank |
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