CN206220066U - Passed the flood period the choosing of the breach flow, down stream energy-dissipating structure for gravity dam bank - Google Patents
Passed the flood period the choosing of the breach flow, down stream energy-dissipating structure for gravity dam bank Download PDFInfo
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- CN206220066U CN206220066U CN201621216727.4U CN201621216727U CN206220066U CN 206220066 U CN206220066 U CN 206220066U CN 201621216727 U CN201621216727 U CN 201621216727U CN 206220066 U CN206220066 U CN 206220066U
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- bank
- breach
- slope
- wall
- flow
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Abstract
Passed the flood period the choosing of the breach flow, down stream energy-dissipating structure for gravity dam bank the utility model discloses a kind of, bank breach is arranged in close on the monolith on side riverbank, in bank breach downstream, cushion pool is set, the side of cushion pool is bank slope, the top of bank slope sets bank platform, lead wall and be arranged on the platform of bank in bank, and be connected with bank Nick End, bank platform is connected by bank slope with cushion pool, dividing pier is arranged in the opposite side that the relative bank breach of wall is led with bank, for preventing current in breach from turning up.The radius that wall is led on the bank is 4H~6H, and wall length is led for 2H~4H in bank, and highly more than 0.4H, it is 5 °~15 ° to lead wall end with the angle of cut of bank slope；The bank slope gradient is more than 1:0.3；The cushion pool depth of water is more than 0.2 Δ Z；H passes the flood period the difference of water level and breach floor elevation for highest, and Δ Z is design upstream and downstream water-head.Packway is not provided with bank slope.Effect of energy dissipation is good, and flow-shape is good, without reflexion and scour flow phenomenon, without concentration impact phenomenon.Main flow does not wash away bank slope, and inshore current velocity is small.It is conventional concrete, it is cheap.
Description
Technical field
The utility model belongs to the devices for dissipation of energy used in Hydraulic and Hydro-Power Engineering, more particularly to a kind of to be used for gravity dam bank
Pass the flood period the energy-dissipating structure of the breach flow.
Background technology
Gravity dam is generally required in the reserved breach of passing the flood period of dam body in the construction time, so that Flood is by the breach flow, so that
Reach reduction reservoir level, guarantee and pour the purposes such as monolith safety.The bank that dam body future insufficiency may be arranged at dam both sides is non-
Overflow Section, the benefit being arranged so as to has：Non-overflow section of dam simple structure, can rapidly recover construction after flood；During flood season excessively stream,
The work such as Metal structure installation, the concreting of Overflow Section are sustainable to be carried out；Save the dam construction duration.It had the disadvantage
, near bank, flow-shape is complicated, energy dissipating is insufficient, current easily cause to wash away to bank slope for flow gap.
Utility model content
Fluidised form is simple when technical problem to be solved in the utility model is to provide a kind of excessively stream, energy dissipating is sufficiently 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 in the utility model is：One kind is used for gravity dam bank degree
The choosing of flood the breach flow, down stream energy-dissipating structure, including bank breach, bank lead wall, bank platform, bank slope, cushion pool and dividing pier,
Bank breach is arranged in close on the monolith on side riverbank, and cushion pool is set in bank breach downstream, and the side of cushion pool is bank
Slope, the top of bank slope sets bank platform, and bank is led wall and is arranged on the platform of bank, and is connected with bank Nick End, bank
Platform is connected by bank slope with cushion pool, and dividing pier is arranged in the opposite side that the relative bank breach of wall is led with bank, for preventing
Current turn up in breach.
The radius that wall is led on the bank is 4H~6H, and bank is led wall length for 2H~4H, highly more than 0.4H, leads wall end
It it is 5 °~15 ° with the angle of cut of bank slope；The bank slope gradient is more than 1:0.3；The cushion pool depth of water is more than 0.2 Δ Z；H passes the flood period water level for highest
And the difference of breach floor elevation, Δ Z is design upstream and downstream water-head.
Packway is not provided with the bank slope.
The beneficial effects of the utility model are：Effect of energy dissipation is good, and flow-shape is good, is rushed without reflexion and scour flow phenomenon, without concentration
Hit phenomenon.Main flow does not wash away bank slope, and inshore current velocity is small.Making material is conventional concrete, cheap.Simple structure, is easy to
Make.Without digging, embankment, easy construction on a large scale.
Brief description of the drawings
Fig. 1 is that the utility model is used for gravity dam bank and passes the flood period the choosing of the breach flow, the structural plan of down stream energy-dissipating structure
Figure；
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 accompanying drawing.
In figure, 1-bank breach, 2-bank lead wall, 3-bank platform, 4-bank slope, 5-cushion pool, 6-dividing pier.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and detailed description：
It is as Figure 1-4, of the present utility model to be passed the flood period the choosing of the breach flow, down stream energy-dissipating structure for gravity dam bank,
Wall 2, bank platform 3, bank slope 4, cushion pool 5 and dividing pier 6 are led including bank breach 1, bank, bank breach 1 is arranged in close to one
On the monolith on side riverbank, on bank, the downstream of breach 1 sets cushion pool 5, and the side of cushion pool 5 is bank slope 4, and the top of bank slope 4 sets
Bank platform 3 is put, bank is led wall 2 and is arranged on bank platform 3, and be connected with the end of bank breach 1, bank platform 3 passes through bank
Slope 4 is connected with cushion pool 5, and dividing pier 6 is arranged in the opposite side that the relative bank breach 1 of wall 2 is led with bank, for preventing in breach
Current turn up.
It is preferred that, the radius that wall 2 is led on the bank is 4H~6H, and bank is led wall length for 2H~4H, highly more than 0.4H, led
Wall end is 5 °~15 ° with the angle of cut of bank slope；The gradient of bank slope 4 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 breach floor elevation, Δ Z is design upstream and downstream water-head.
Packway is not provided with the bank slope 4.
The utility model using experiment and theoretical analysis method bank is led wall, bank slope and cushion pool size carried out it is excellent
Choosing.The elevation and width of bank breach are general to be determined according to engineering practice by water force, and the utility model is assumed to lack
The intraoral design head difference of water level and breach floor elevation (highest pass the flood period) for H, design upstream and downstream water-head are Δ Z, then preferably
Wall radius is led for 4H~6H in bank afterwards, and wall length is led for 2H~4H in bank, and it is 5 °~15 ° to lead wall end with the angle of cut of bank slope,
Wall thickness is led not less than 1m, highly more than 0.4H；The bank slope gradient is more than 1:0.3, bank slope is without packway；Plunge pool floor elevation passes through
The cushion pool depth of water determines that the cushion pool depth of water is more than 0.2 Δ Z.The utility model makes of conventional concrete.
The operation principle of " for the choosing of gravity dam bank the breach flow, down stream energy-dissipating structure " described in the utility model exists
In：1) wall is led by bank, the part current flip shot for using breach enters cushion pool, current is disperseed energy dissipating；2) breach is gone out
Current enter cushion pool in the form of down stream, by down stream energy dissipation by hydraulic jump；3) because bank slope is without packway, current do not liquidate bank slope, and
Main flow is oriented to cushion pool, so as to reach the purpose of protection bank slope.
As shown in figure 5, engineering is located at Lancang River mainstream where the present embodiment, breach of passing the flood period is arranged in dam right bank, breach
Design vent flow is 3924m3/ s, highest passes the flood period water level for 1456m, and the corresponding level of tail water is 1415m, upstream and downstream water-head
Δ Z=41m, design head H=26m in breach.To solve the problems, such as bank the breach flow dissipation and scouring, plan uses the utility model
" for the choosing of gravity dam bank the breach flow, the down stream energy dissipater " carries out energy dissipating, and it is as follows about size：Breach bottom elevation
1430m, width 40m, the dividing pier and non-overflow section of dam crest level of breach both sides are 1481m, and right bank bank platform height is 1430m,
Wall radius is led for 120m, 72m long, thickness 1m, 11m high, bank slope 30m high in plunge pool floor elevation 1400m, bank, and the gradient is 1:
0.23。
The utility model has the following effects that：
1st, effect of energy dissipation is good.As in embodiment, when upstream and downstream water-head is 26m, flow is 3924m3During/s, go out water cushion
Pool flow velocity is only 7.7m/s, and energy dissipation rate is 89.2%.
2nd, flow-shape is good.Experiment shows that under condition of work described in embodiment, current are dispersed into cushion pool, without folding
Bath flow phenomenon, without concentrate impact phenomenon.
3rd, main flow does not wash away bank slope, and inshore current velocity is small.Under condition of work described in embodiment, the inshore current velocity after cushion pool
Less than 7m/s.
4th, making material is conventional concrete, cheap.
5th, simple structure, is easy to make.
6th, without digging, embankment, easy construction on a large scale.
Embodiment described above is merely to illustrate technological thought of the present utility model and feature, its object is to make ability
Technical staff in domain it will be appreciated that content of the present utility model and implement according to this, it is impossible to only limits this practicality with the present embodiment
New the scope of the claims, i.e., equal change or modification that the spirit disclosed in all the utility model is made still fall new in this practicality
In the scope of the claims of type.
Claims (3)
1. it is a kind of to be passed the flood period the choosing of the breach flow, down stream energy-dissipating structure for gravity dam bank, it is characterised in that including bank breach
(1), wall (2), bank platform (3), bank slope (4), cushion pool (5) and dividing pier (6) are led in bank, bank breach (1) be arranged in close to
On the monolith on side riverbank, on bank, breach (1) downstream sets cushion pool (5), and the side of cushion pool (5) is bank slope (4), bank slope
(4) top sets bank platform (3), and bank is led wall (2) and is arranged on bank platform (3), and with bank breach (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 relative bank of wall (2) with bank
The opposite side of breach (1), for preventing current in breach from turning up.
2. it is used to gravity dam bank according to claim 1 pass the flood period the choosing of the breach flow, down stream energy-dissipating structure, its feature exists
The radius for leading wall (2) in, the bank is 4H~6H, and wall length is led for 2H~4H in bank, highly more than 0.4H, lead wall end with
The angle of cut of bank slope is 5 °~15 °；Bank slope (4) gradient is more than 1:0.3；The cushion pool depth of water is more than 0.2 Δ Z；H passes the flood period water level for highest
And the difference of breach floor elevation, Δ Z is design upstream and downstream water-head.
3. it is according to claim 1 or claim 2 to be passed the flood period the choosing of the breach flow, down stream energy-dissipating structure, its feature for gravity dam bank
It is to be not provided with packway on the bank slope (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621216727.4U CN206220066U (en) | 2016-11-11 | 2016-11-11 | Passed the flood period the choosing of the breach flow, down stream energy-dissipating structure for gravity dam bank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621216727.4U CN206220066U (en) | 2016-11-11 | 2016-11-11 | Passed the flood period the choosing of the breach flow, down stream energy-dissipating structure for gravity dam bank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206220066U true CN206220066U (en) | 2017-06-06 |
Family
ID=58793070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621216727.4U Withdrawn - After Issue CN206220066U (en) | 2016-11-11 | 2016-11-11 | Passed the flood period the choosing of the breach flow, down stream energy-dissipating structure for gravity dam bank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206220066U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106368186A (en) * | 2016-11-11 | 2017-02-01 | 中国电建集团北京勘测设计研究院有限公司 | Jet flow and drop flow energy dissipation structure for overflowing of shore-side flood protection gap of gravity dam |
-
2016
- 2016-11-11 CN CN201621216727.4U patent/CN206220066U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106368186A (en) * | 2016-11-11 | 2017-02-01 | 中国电建集团北京勘测设计研究院有限公司 | Jet flow and drop flow energy dissipation structure for overflowing of shore-side flood protection gap of gravity dam |
| CN106368186B (en) * | 2016-11-11 | 2018-08-17 | 中国电建集团北京勘测设计研究院有限公司 | It passes the flood period the choosing of the breach flow, down stream energy-dissipating structure for gravity dam bank |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170606 Effective date of abandoning: 20180817 |
|
| AV01 | Patent right actively abandoned |