CN201915369U - Vehicle sheet water flow control and energy dissipation structure for high overfall dam - Google Patents
Vehicle sheet water flow control and energy dissipation structure for high overfall dam Download PDFInfo
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- CN201915369U CN201915369U CN2010206581797U CN201020658179U CN201915369U CN 201915369 U CN201915369 U CN 201915369U CN 2010206581797 U CN2010206581797 U CN 2010206581797U CN 201020658179 U CN201020658179 U CN 201020658179U CN 201915369 U CN201915369 U CN 201915369U
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Abstract
The utility model provides a vertical sheet water flow control and energy dissipation structure for a high overfall dam, which comprises an overfall dam body and a plurality of gate piers arranged at the upper end of the overfall dam body, wherein the necked side walls are arranged on the left and the right sides of the overfall dam body, a water flow guide and compression side wall is connected to the downstream end of the necked side walls, a rim is connected to the bottom of the water flow guide and compression side wall, the upstream ends of the necked side walls are connected with the gate piers, the bottoms of the necked side walls are jointed with the dam faces of the overfall dam body, the wall bodies of the necked side walls are on the same altitude in the water flow direction, the upstream end of the water flow guide and compression side wall is connected with the necked side walls, the bottom of the water flow guide and compression side wall comprises a single arc-shaped segment and a flat segment connected behind the arc-shaped segment, the height of the wall body of the water flow guide and compression side wall is gradually increased in the water flow direction, and the rim is a 0-degree flip bucket with a horizontal flip shot angle. The vertical sheet water flow control and energy dissipation structure can transform a high-speed water flow discharged from the overfall dam into a vertical sheet water flow which flows into a natural river channel, so as to significantly reduce the overfall width, reduce the floor area of the flood discharge building and reduce the actual discharge per unit width of the incoming water.
Description
[technical field]
The utility model relates to a kind of dam structure with flood discharge function, the vertical thin slice current control of a kind of specifically high overfall dam energy-dissipating structure.
[background technology]
The high water head flood releasing structure is the key that ensures Hydraulic and Hydro-Power Engineering safety and give full play to economic benefit, and according to incompletely statistics, the expense that the energy dissipater builds accounts for 40%～50% of whole water power building cost.Because the current by letting out under the high dam have huge energy, therefore, deal with improperly and will cause engineering to destroy, even natural environment is caused adverse effect.As the Ka Liba dam of Zambezi, height of dam 128m, design discharge per unit width 176m3/sm, the riverbed rock sluices operation after 9 years for rotten gneiss, engineering, and actual measurement riverbed dinting depth has reached 60m, through playback test and theory analysis, if do not take safeguard procedures, the riverbed will be further towards dark 20～30m.In addition, the dam is built in the valley, and also to run into the place narrow and small, the hinge difficult arrangement, and high-velocity flow directly impacts the downstream massif, or massif is carried out problem such as large tracts of land excavation, certainly will increase construction costs, and Fujian Province's key project south one reservoir is typical example.So dam flood releasing structure and powerhouse of hydropower station are built in the valley, and to strive the flood-discharge energy-dissipating problem of ground and high-velocity flow be a key technology difficult problem in the Dam Construction.
[utility model content]
The technical problems to be solved in the utility model, be to provide the vertical thin slice current control of a kind of high overfall dam energy-dissipating structure, it can make sluice the down at a high speed transverse width of stream of overfall dam sharply dwindle with power station after adapting to valley natural conditions and dam and arrange, laterally, vertical height fully develops to improve its energy dissipation rate.
The utility model is achieved in that
The utility model is the vertical thin slice current control of an a kind of high overfall dam energy-dissipating structure, it comprises an overflow dam body, the upper end of described overflow dam body is provided with some gate piers, the described overflow dam body left and right sides is provided with narrows abutment wall, the described downstream that narrows abutment wall connects a current deflecting and compression side wall, and described current deflecting is connected with the bottom of compression side wall chooses bank.
Further, the described upstream extremity that narrows abutment wall links to each other with described gate pier, and the bottom is connected with the dam facing of described overflow dam body, and its body of wall is contour along water (flow) direction.
Further, described current deflecting links to each other with the described abutment wall that narrows with the upstream extremity of compression side wall, and the bottom is to connect one flat section behind the single circular arc, and its body of wall is progressively increased along water (flow) direction.
Further, the described bank of choosing is 0 ° and chooses bank that it is the flip bucket of level for the flip shot angle.
Advantage of the present utility model is:
The utility model is according to the actual conditions of upstream incoming flow, control first shrinkage ratio, angle of throat first by narrowing abutment wall, by current deflecting and compression side wall control shrinkage ratio, the angle of throat and the vertical critical technical parameters such as diffusance of thin slice current for the second time for the second time, make the Froude number of high-velocity flow obtain effective adjustment, the unfavorable fluidised form of having avoided high-velocity flow to produce crossing of spillwag chute, simultaneously, also be that the layout in power station has won valuable construction space behind the dam;
The utility model has adopted abovementioned technology and 0 ° of flip bucket, the current with huge kinetic energy that the flood releasing structure outlet is penetrated sharply draw back along vertical (along the height of dam direction) and vertical (flow path direction along the river), the actual discharge per unit width that makes current enter underwater bed obviously reduces on the one hand, the contact surface of sluice stream and air is significantly increased, thereby increased the effect of aerial energy dissipating, therefore, effectively avoided the direct impact of high-speed jet, alleviated the scour of high-velocity flow the downstream natural river course to the downstream massif.
[description of drawings]
In conjunction with the embodiments the utility model is further described with reference to the accompanying drawings.
Fig. 1 is a vertical view of the present utility model.
Fig. 2 is a sectional view of the present utility model.
[specific embodiment]
See also Fig. 1, shown in Figure 2, embodiment of the present utility model is described in detail.
As Fig. 1, Fig. 2, the vertical thin slice current control of a kind of high overfall dam energy-dissipating structure, it comprises an overflow dam body 1, the upper end of described overflow dam body 1 is provided with some gate piers 2, described overflow dam body 1 left and right sides is provided with narrows abutment wall 3, the described downstream that narrows abutment wall 3 connects a current deflecting and compression side wall 4, and described current deflecting is connected with the downstream of compression side wall 4 chooses bank 5.The described upstream extremity that narrows abutment wall 3 links to each other with described gate pier 2, and the bottom is connected with the dam facing of described overflow dam body 1, and its body of wall is contour along water (flow) direction.Described current deflecting links to each other with the described abutment wall 3 that narrows with the upstream extremity of compression side wall 4, and the bottom is to connect one flat section behind the single circular arc, and its body of wall is progressively increased along water (flow) direction.The described bank 5 of choosing is 0 ° and chooses bank that it is the flip bucket of level for the flip shot angle.They have constituted the vertical thin slice current control of high overfall dam of the present utility model energy-dissipating structure.During flood discharge, make the Froude number of the high-velocity flow of letting out for 1 time from overfall dam be adjusted to required numerical value by above-mentioned engineering measure after, high-velocity flow is chosen bank 5 through 0 ° and is let out river course downstream with vertical thin slice current form.
The utility model has been because adopted on short and steep overflow dam body 1 and narrowed abutment wall 3 and current deflecting and compression side wall 4, according to the actual conditions of upstream incoming flow, by narrowing abutment wall 3 contraction flood spillways, controls first shrinkage ratio, angle of throat first; Shrink flood spillway by current deflecting and compression side wall 4, an and guide functions, control is shrinkage ratio, the angle of throat and the vertical critical technical parameters such as diffusance of thin slice current for the second time for the second time, make the Froude number of high-velocity flow obtain effective adjustment, the unfavorable fluidised form of having avoided high-velocity flow to produce crossing of spillwag chute, simultaneously, also be that the layout in power station has won valuable construction space behind the dam.Moreover, employing by above-mentioned engineering measure and 0 ° of flip bucket 5, the current with huge kinetic energy that the flood releasing structure outlet is penetrated sharply draw back along vertical (along the height of dam direction) and horizontal (flow path direction along the river), the actual discharge per unit width that makes current enter underwater bed obviously reduces on the one hand, the contact surface of sluice stream and air is significantly increased, thereby increased the effect of aerial energy dissipating, therefore, effectively avoided the direct impact of high-speed jet to the downstream massif, alleviated the scour of high-velocity flow to the downstream natural river course, so the utility model can reach the purpose of drafting.As figure, when flood discharge, current by overfall dam 1, narrow the water channel that abutment wall 3, current deflecting and compression side wall 4 are controlled, through 0 ° of flip bucket, 5 directive downstream natural river courses.
The above, it only is the utility model preferred embodiment, so can not limit the scope that the utility model is implemented according to this, i.e. the equivalence of doing according to the utility model claim and description changes and modifies, and all should still belong in the scope that the utility model contains.
Claims (4)
1. the vertical thin slice current of high overfall dam are controlled energy-dissipating structure, it comprises an overflow dam body, the upper end of described overflow dam body is provided with some gate piers, it is characterized in that: the described overflow dam body left and right sides is provided with narrows abutment wall, the described downstream that narrows abutment wall connects a current deflecting and compression side wall, and described current deflecting is connected with the bottom of compression side wall chooses bank.
2. the vertical thin slice current control of a kind of high overfall dam according to claim 1 energy-dissipating structure, it is characterized in that: the described upstream extremity that narrows abutment wall links to each other with described gate pier, and the bottom is connected with the dam facing of described overflow dam body, and its body of wall is contour along water (flow) direction.
3. the vertical thin slice current control of a kind of high overfall dam according to claim 1 energy-dissipating structure, it is characterized in that: described current deflecting links to each other with the described abutment wall that narrows with the upstream extremity of compression side wall, the bottom is to connect one flat section behind the single circular arc, and its body of wall is progressively increased along water (flow) direction.
4. the vertical thin slice current of a kind of high overfall dam according to claim 1 control energy-dissipating structure is characterized in that: the described bank of choosing is 0 ° and chooses bank that it is the flip bucket of level for the flip shot angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206581797U CN201915369U (en) | 2010-12-13 | 2010-12-13 | Vehicle sheet water flow control and energy dissipation structure for high overfall dam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206581797U CN201915369U (en) | 2010-12-13 | 2010-12-13 | Vehicle sheet water flow control and energy dissipation structure for high overfall dam |
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| Publication Number | Publication Date |
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| CN201915369U true CN201915369U (en) | 2011-08-03 |
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| CN2010206581797U Expired - Lifetime CN201915369U (en) | 2010-12-13 | 2010-12-13 | Vehicle sheet water flow control and energy dissipation structure for high overfall dam |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102912771A (en) * | 2012-11-08 | 2013-02-06 | 四川大学 | Stepped surface local sidewall for air entrainment and cavitation alleviation behind X-type flaring gate pier |
| CN103835270A (en) * | 2014-03-17 | 2014-06-04 | 水利部交通运输部国家能源局南京水利科学研究院 | Hollow-bottom-plate retractable type energy dissipation method and energy dissipater |
| CN104404925A (en) * | 2014-10-08 | 2015-03-11 | 四川大学 | Porous inflow hedging energy dissipation structure of hydraulic structure |
| CN104480911A (en) * | 2014-10-24 | 2015-04-01 | 河海大学 | Flexible foundation energy dissipater structure |
| CN104563067A (en) * | 2014-12-17 | 2015-04-29 | 河海大学 | Method for eliminating deviation of water jet of water tongue shock wave of slot sill and auto-correcting deviation slot sill |
| CN107326877A (en) * | 2017-08-25 | 2017-11-07 | 中国电建集团成都勘测设计研究院有限公司 | Energy dissipater is concentrated in bilateral undercurrent collision under water |
-
2010
- 2010-12-13 CN CN2010206581797U patent/CN201915369U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102912771A (en) * | 2012-11-08 | 2013-02-06 | 四川大学 | Stepped surface local sidewall for air entrainment and cavitation alleviation behind X-type flaring gate pier |
| CN102912771B (en) * | 2012-11-08 | 2014-10-15 | 四川大学 | Stepped surface local sidewall for air entrainment and cavitation alleviation behind X-type flaring gate pier |
| CN103835270A (en) * | 2014-03-17 | 2014-06-04 | 水利部交通运输部国家能源局南京水利科学研究院 | Hollow-bottom-plate retractable type energy dissipation method and energy dissipater |
| CN103835270B (en) * | 2014-03-17 | 2015-09-16 | 水利部交通运输部国家能源局南京水利科学研究院 | Hollow out base plate contraction type energy dissipating method and energy dissipater |
| CN104404925A (en) * | 2014-10-08 | 2015-03-11 | 四川大学 | Porous inflow hedging energy dissipation structure of hydraulic structure |
| CN104404925B (en) * | 2014-10-08 | 2016-08-17 | 四川大学 | Hydraulic structure porous becomes a mandarin colliding energy dissipation structure |
| CN104480911A (en) * | 2014-10-24 | 2015-04-01 | 河海大学 | Flexible foundation energy dissipater structure |
| CN104563067A (en) * | 2014-12-17 | 2015-04-29 | 河海大学 | Method for eliminating deviation of water jet of water tongue shock wave of slot sill and auto-correcting deviation slot sill |
| CN107326877A (en) * | 2017-08-25 | 2017-11-07 | 中国电建集团成都勘测设计研究院有限公司 | Energy dissipater is concentrated in bilateral undercurrent collision under water |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110803 |
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| CX01 | Expiry of patent term |