CN203256706U - Underflow energy dissipation structure of broken slope in hydraulic and hydroelectric projects - Google Patents
Underflow energy dissipation structure of broken slope in hydraulic and hydroelectric projects Download PDFInfo
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- CN203256706U CN203256706U CN 201320291252 CN201320291252U CN203256706U CN 203256706 U CN203256706 U CN 203256706U CN 201320291252 CN201320291252 CN 201320291252 CN 201320291252 U CN201320291252 U CN 201320291252U CN 203256706 U CN203256706 U CN 203256706U
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- absorption basin
- slope
- folding
- hydraulic
- energy dissipation
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Abstract
The utility model discloses an underflow energy dissipation structure of broken slope in hydraulic and hydroelectric projects. The structure comprises a side overflow weir, a discharge chute and a stilling pool, wherein the stilling pool is a stilling pool of the broken slope and comprises a broken slope section of the stilling pool connected with the discharge chute and a flat bottom section of the stilling pool with a flat bottom deep pool manually excavated. A head of a hydraulic jump in the stilling pool is formed on the broken slope section of the stilling pool, and a stable integral hydraulic jump is formed in the stilling pool of the broken slope. The stilling pool is internally provided with a plurality of stilling piers assisting energy dissipation. The energy dissipation structure disclosed by the utility model can economically and effectively solve the energy dissipation problem of water flows with large flow, low Froude number and greater change on range of stage of tail water, so that the energy dissipation efficiency is effectively improved. The pool length and depth in the flat bottom section of the stilling pool are effectively reduced, the energy dissipation is improved, the work amount and project investment are reduced, and the excavating height and range of the slope in the project area are reduced by means of the stilling pool of the broken slope and stilling piers assisting energy dissipation arranged in the flat bottom section of the stilling pool, so that damage and influence to ecological environment in the project area by construction are reduced, and good social and economic benefits are obtained.
Description
Technical field
The utility model relates to the disspation through hydraudic jimp structure in a kind of Hydraulic and Hydro-Power Engineering, especially relates to the disspation through hydraudic jimp structure in the larger Hydraulic and Hydro-Power Engineering of a kind of large flow, low not your moral number, tail water luffing.
Background technology
The absorption basin length of traditional hydraulics disspation through hydraudic jimp worker theory of computation calculative determination, it is long to be considered as the absorption basin pond with flat section, and energy dissipation by hydraulic jump occurs in flat section pond.Discharge per unit width more greatly in the absorption basin, not your moral number current lower, that downstream tail water is more shallow carry out Energy Dissipator Design for entering, and it is larger to adopt this theory of computation to calculate required absorption basin length; Simultaneously, because it is larger to enter the pond flow, then the second sequent depth is larger, thereby the pond is deeply larger.Therefore engineering quantity and the construction investment of absorption basin are larger, and the flood spillway that especially is arranged in the bank is subjected to the topographic and geologic condition restriction, often are difficult to satisfy the demand of the absorption basin layout of designing by traditional theory.
The utility model content
The technical problems to be solved in the utility model is, provide a kind of and can reduce the flat segment length of absorption basin, reduce the depth of water requirement of downstream dissipator of energy district, adapt to the conditions such as large flow, low not your moral number, tail water luffing are larger, the effect of energy dissipation flood-discharge energy-dissipating structure in the Hydraulic and Hydro-Power Engineering of disspation through hydraudic jimp preferably.
The technical scheme that the utility model adopts is: a kind of folding of Hydraulic and Hydro-Power Engineering slope disspation through hydraudic jimp structure comprises the bank overflow weir, lets out groove, absorption basin.Absorption basin is the sloping absorption basin of folding, comprises and flat section of the absorption basin of letting out the flat dark pond that absorption basin folding slope section that groove is connected and hand excavation form, and the absorption basin pool inner water jumps and firstly forms the stable complete hydraulic jump of formation in rolling over sloping absorption basin in absorption basin folding slope section.
Be provided with a plurality of baffle piers of auxiliary energy dissipating in the described absorption basin pond.
Described baffle pier places in flat section pond of absorption basin, and the pier crest level of baffle pier is lower than absorption basin tail sill elevation.
The height of described baffle pier enters 0.4-0.6 times that place, pond current shrink the depth of water and are no more than the absorption basin tail sill degree of depth to equal design conditions, and altitude range is 2-4m; The width of baffle pier is 0.7-1 times of its height, and scope is 2-4m.
Described adjacent two baffle pier intervals equate that with the baffle pier height baffle pier arranges row and is no more than 2 rows.
The lower head that sluices stream is 20～40m in the flood-discharge energy-dissipating structure; Roll in the sloping absorption basin current not your moral number be 1～2, Peak Flow Rate 14～26m/s enters the flow velocity of flat section of absorption basin less than 16～18m/s; Entering the pond discharge per unit width is 60～200m
3/ s.
Downstream Tailwater Depth luffing is 4～25m.
The beneficial effects of the utility model are:
(1) utilizes outlet structure escape works to be furnished with the bank overflow weir and let out groove, roll over flat section of the absorption basin that sloping absorption basin section comprises the flat dark pond of absorption basin folding slope section and hand excavation's formation, the utility model structure can farthest utilize the bank to let out groove, thereby reduce the flat segment length of absorption basin, flat section pond length of absorption basin can reduce 30%～50%.
(2) simultaneously participate in auxiliary energy dissipating owing to be provided with baffle pier according to situation, increased energy dissipation rate when having reduced energy dissipating to the dark requirement in pond, the pond can reduce 20%～30% deeply, energy dissipation rate 20%～26% is increased to 30%～50% when baffle pier is not set.
(3) it is larger to enter the discharge per unit width of pond current, and the absorption basin engineering quantity effect of saving is more for significantly.
(4) the absorption basin layout design saving effect to Bank-run Spillway is particularly remarkable.
(5) energy-dissipating structure of the present utility model, economical and effectively solved the Dissipation of Energy of the larger current of large flow, low not your moral number and tailwater elevation luffing, effectively improved energy dissipation rate; Utilize absorption basin folding slope section, and in flat section of absorption basin, be provided with baffle pier and assist energy dissipating, it is long and the pond is dark effectively to have reduced flat section pond of absorption basin, improved energy dissipation rate, engineering quantity and construction investment have been reduced, reduced excavation height and the scope of Project Areas side slope, thus reduced construction on destruction and the impact of Project Areas ecological environment, reduced construction risk, obtained good Social benefit and economic benefit.
Description of drawings
Fig. 1 is the disspation through hydraudic jimp structural plan schematic diagram in the Hydraulic and Hydro-Power Engineering of the present utility model.
Fig. 2 is A among Fig. 1-A sectional drawing.
Fig. 3 is the disspation through hydraudic jimp structure fluidised form figure in the Hydraulic and Hydro-Power Engineering of the present utility model.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:
Shown in Fig. 1-2, the folding of Hydraulic and Hydro-Power Engineering of the present utility model slope disspation through hydraudic jimp structure comprises the bank overflow weir, lets out groove, absorption basin.Absorption basin is the sloping absorption basin of folding, comprise and flat section 4 of the absorption basin of letting out the flat dark pond that absorption basin folding slope section 3 that groove 2 is connected and hand excavation form, the absorption basin pool inner water jumps first in section 3 formation of absorption basin folding slope, forms stable complete hydraulic jump in the sloping absorption basin of folding.
Be provided with a plurality of baffle piers 5 of auxiliary energy dissipating in the sloping absorption basin of the described folding pond.
Described baffle pier 5 places in flat section 4 ponds of absorption basin, and the pier crest level of baffle pier 5 is lower than absorption basin tail sill elevation.
The height of described baffle pier 5 enters 0.4-0.6 times that place, pond current shrink the depth of water and are no more than the absorption basin tail sill degree of depth to equal design conditions, and altitude range is 2-4m; The width of baffle pier 5 is 0.7-1 times of its height, and scope is 2-4m.
Described adjacent two baffle pier 5 intervals equate highly that with baffle pier 5 baffle pier arranges row and is no more than 2 rows.
The lower head that sluices stream is 20～40m in the flood-discharge energy-dissipating structure; Roll in the sloping absorption basin current not your moral number be 1～2, Peak Flow Rate 14～26m/s enters the flow velocity of flat section 4 of absorption basin less than 16～18m/s; Entering the pond discharge per unit width is 60～200m
3/ s.
Downstream Tailwater Depth luffing is 4～25m.
Specifically, the flood of letting out for 1 time by overflow weir is let out groove 2 by the abrupt slope and is entered flat section 4 of absorption basin folding slope section 3 and absorption basin, and energy dissipating Hydraulic Jump head forms in absorption basin folding slope section 3, forms stable complete hydraulic jump in absorption basin.If do not utilize absorption basin folding slope section 3 parts as absorption basin, then energy dissipation by hydraulic jump routinely way should in flat section 4 of absorption basin, form, namely utilize energy dissipation by hydraulic jump fully in flat section 4 of absorption basin, therefore required absorption basin will be longer than absorption basin of the present utility model; For adapting to into the larger discharge per unit width luffing in pond and more shallow downstream tail water, effectively the required degree of depth of less energy dissipating, improve energy dissipation rate, be provided with baffle pier 5 and assist energy dissipating, for energy dissipating fully and pool inner water is jumped be in and stablize the hydraulic jump state, keep preferably water surface fluidised form, baffle pier 5 should place in flat section 4 of the absorption basin, and baffle pier pier crest level should be lower than absorption basin tail sill elevation.The height of baffle pier enters to equal design conditions that pond place current shrink the depth of water, the 0.4-0.6 that is no more than the pond tail sill degree of depth doubly, and be no more than 4m and be advisable; The width of baffle pier be its height 0.7-1 doubly, its interval with highly equate; Baffle pier is no more than 2 rows with setting and is advisable.
Adopt the utility model pond length can reduce 30%～50%, the pond deeply can be reduced 20%～30%, be improved energy dissipation rate to 30%～50%; And the discharge per unit width that enters the pond current is larger, and the absorption basin engineering quantity effect of saving is more for remarkable.
Be elaborated below in conjunction with specific embodiment:
Certain large (2) type Hydropower Project, warehouse-in check flood peak flood flow 8300m
3/ s, design flood peak flood flow 6630m
3/ s, energy dissipating erosion control standard flood peak flood flow 4940m
3/ s, maximum flood discharge head 36m, the about 2925MW of corresponding flood discharge power.Engineering cloth is equipped with the bank open spillway, is 5987.6m during the flow capacity checking flood by letting out under the flood spillway wherein
3Flow is 4476.9m when/s, design flood
3Flow is 2853.8m when/s, energy dissipating erosion control standard
3/ s.Consider Cascade Hydropower Stations on River Basin management and running and this power station security of operation, guarantee when exceeding standard flood, unlikely casual dam, so flood spillway also should possess enough super abilities of letting out, corresponding letdown flow reaches 6307m
3/ s.Because flood-discharge energy-dissipating district riverbed erosion resistibility is poor, and nearer apart from power plant building and village, affect, do not affect the normal power generation in power station and the safety of downstream protection object for alleviating and controlling flood-discharge atomizing, adopted the mode of disspation through hydraudic jimp.
Spillway chute and absorption basin adopt wide layout, and width is 32m, and with the variation of letdown flow, it is large and luffing is larger to let out trough inner water stream discharge per unit width, enters the maximum discharge per unit width in pond and reaches 197.1m
3/ s; Not your moral number is lower to enter the pond, is about 1.In addition, downstream river course depth of water luffing is larger, be 4.39～20.31m, tail water depth of water integral body is more shallow, if adopt conventional disspation through hydraudic jimp, for making energy dissipating fully to alleviate washing away and depositing of downstream river course, the required about 110m of absorption basin length, dark about 13m, not only construction investment is large, and does not allow for the topographic and geologic condition.
This engineering flood spillway has the long groove of letting out, and bedrock property is better, therefore, should consider to utilize the condition of letting out groove self, design absorption basin folding slope section, will let out groove and be combined with absorption basin, optimize flood discharge and energy dissipating construction, to simplify construction, to reduce engineering difficulty, cost saving as far as possible.
Shown in Fig. 1-2, flood releasing structure adopts the bank open spillway, lets out groove 2 ends and is provided with absorption basin folding slope section 7 and flat section 4 folding slope formula underflow stilling basin that forms; Be to reduce flat section degree of depth of absorption basin and increase energy dissipater's energy dissipation rate, be provided with baffle pier 5 in flat section 4 of the absorption basin.Adopt layout of energy dissipaters mode of the present utility model, make the flat segment length of absorption basin be reduced to 60m by the 110m of routine, reduce length and reach 45%; In addition, for energy dissipating fully and pool inner water is jumped be in and stablize the hydraulic jump state, keep preferably water surface fluidised form, in flat section absorption basin 4, be provided with 2 and arrange baffle piers and assist energy dissipating, baffle pier pier crest level is lower than absorption basin tail sill elevation, highly is 4m.After baffle pier is set assists energy dissipating, effectively reduced the second sequent depth, thereby it is dark to have reduced the pond, the pond deeply 13m when baffle pier is not set reduces to 10m, has reduced 30%, energy dissipation rate 20%～26% is increased to 30%～50% when baffle pier is not set.
As shown in Figure 3, after flood spillway adopts above-mentioned energy dissipating pattern, all present stable complete hydraulic jump fluidised form in the absorption basin, go out the pond reduction of surging, the breaking water level drop reduces on the protection-apron, the water surface is smooth-going, and along with the increase of discharge, downstream skew is put gradually in the first place that jumps of hydraulic jump in the absorption basin.Each operation condition energy dissipation rate reaches 30%～50%.
It is better that each operation condition downstream river course tail water is connected fluidised form, during accidental conditions, and factory building tailrace outlet place, surface velocity V=0.3m/s, underflow speed V=0.21m/s; Base of dam place, barrage downstream is in inner lead substantially; Downstream base of dam, tailrace tunnel export between the spillway apron without obviously punching silt; Favourable opposition hole, each the operation condition riverbed degree of depth reduces about 5m, and effect of energy dissipation is remarkable.
This engineering is owing to adopted energy dissipating construction pattern described in the utility model, preferably resolve the Dissipation of Energy of large flow, low not your moral number, current that the tail water luffing is larger, not only improved energy dissipation rate, length and the degree of depth of absorption basin have also effectively been reduced, engineering quantity and construction investment have been reduced, excavation height and the scope of Project Areas side slope have been reduced, thereby reduced construction on destruction and the impact of Project Areas ecological environment, reduced construction risk, obtained good Social benefit and economic benefit.This flood-discharge energy-dissipating pattern be applicable to large flow, low not your moral number, tail water luffing large, have a disspation through hydraudic jimp structure design that longer slope section is let out groove.
Above-described embodiment only is used for illustrating technological thought of the present utility model and characteristics, its purpose is to make those skilled in the art can understand content of the present utility model and implements according to this, can not only limit claim of the present utility model with present embodiment, be equal variation or the modification that spirit that all the utility model disclose is done, still can be in claim of the present utility model.
Claims (7)
1. the folding of Hydraulic and Hydro-Power Engineering slope disspation through hydraudic jimp structure, comprise the bank overflow weir, let out groove, absorption basin, it is characterized in that, absorption basin is the sloping absorption basin of folding, comprise flat section of the absorption basin (4) with the flat dark pond of letting out absorption basin folding slope section (3) that groove (2) is connected and hand excavation's formation, the absorption basin pool inner water jumps first in absorption basin folding slope section (3) formation, forms stable complete hydraulic jump in the sloping absorption basin of folding.
2. the folding of Hydraulic and Hydro-Power Engineering according to claim 1 slope disspation through hydraudic jimp structure is characterized in that, is provided with a plurality of baffle piers (5) of auxiliary energy dissipating in flat section pond of the sloping absorption basin of described folding.
3. the folding of Hydraulic and Hydro-Power Engineering according to claim 2 slope disspation through hydraudic jimp structure is characterized in that described baffle pier (5) places in flat section (4) pond of absorption basin, and the pier crest level of baffle pier (5) is lower than absorption basin tail sill elevation.
4. the folding of Hydraulic and Hydro-Power Engineering according to claim 3 slope disspation through hydraudic jimp structure, it is characterized in that, the height of described baffle pier (5) enters 0.4-0.6 times that place, pond current shrink the depth of water and are no more than the absorption basin tail sill degree of depth to equal design conditions, and altitude range is 2-4m; The width of baffle pier (5) is 0.7-1 times of its height, and scope is 2-4m.
5. the folding of Hydraulic and Hydro-Power Engineering according to claim 4 slope disspation through hydraudic jimp structure is characterized in that, described adjacent two baffle piers (5) interval equates highly that with baffle pier (5) baffle pier arranges row and is no more than 2 rows.
6. the folding of each described Hydraulic and Hydro-Power Engineering slope disspation through hydraudic jimp structure is characterized in that according to claim 1-5, and the head of the lower stream that sluices is 20～40m in the flood-discharge energy-dissipating structure; Roll in the sloping absorption basin current not your moral number be 1～2, Peak Flow Rate 14～26m/s enters the flow velocity of absorption basin flat section (4) less than 16～18m/s; Entering the pond discharge per unit width is 60～200m
3/ s.
7. the folding of Hydraulic and Hydro-Power Engineering according to claim 6 slope disspation through hydraudic jimp structure is characterized in that downstream Tailwater Depth luffing is 4～25m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320291252 CN203256706U (en) | 2013-05-24 | 2013-05-24 | Underflow energy dissipation structure of broken slope in hydraulic and hydroelectric projects |
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|---|---|---|---|
| CN 201320291252 CN203256706U (en) | 2013-05-24 | 2013-05-24 | Underflow energy dissipation structure of broken slope in hydraulic and hydroelectric projects |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266583A (en) * | 2013-05-24 | 2013-08-28 | 中国水电顾问集团北京勘测设计研究院 | Bent slope underflow energy dissipation structure of water conservancy and hydropower engineering |
| CN104264639A (en) * | 2014-09-11 | 2015-01-07 | 四川大学 | Underflow type stair stilling pool energy consumption system |
| CN104594493A (en) * | 2015-01-23 | 2015-05-06 | 中水北方勘测设计研究有限责任公司 | Circulating water outfall structure for thermal power plant |
| CN106120673A (en) * | 2016-06-30 | 2016-11-16 | 四川大学 | The turning spillway being applicable under high Froude number |
| CN107288105A (en) * | 2017-07-11 | 2017-10-24 | 浙江省水利水电勘测设计院 | A kind of special-shaped block energy-dissipating structure |
| CN108842734A (en) * | 2018-08-13 | 2018-11-20 | 中国电建集团华东勘测设计研究院有限公司 | Band blocks water the stilling pond or cushion pool of pier |
| CN109339006A (en) * | 2018-12-05 | 2019-02-15 | 张迈 | A kind of efficient bevel-type waterpower stilling pool slab and its construction method |
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2013
- 2013-05-24 CN CN 201320291252 patent/CN203256706U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266583A (en) * | 2013-05-24 | 2013-08-28 | 中国水电顾问集团北京勘测设计研究院 | Bent slope underflow energy dissipation structure of water conservancy and hydropower engineering |
| CN103266583B (en) * | 2013-05-24 | 2015-05-20 | 中国水电顾问集团北京勘测设计研究院 | Bent slope underflow energy dissipation structure of water conservancy and hydropower engineering |
| CN104264639A (en) * | 2014-09-11 | 2015-01-07 | 四川大学 | Underflow type stair stilling pool energy consumption system |
| CN104264639B (en) * | 2014-09-11 | 2016-04-20 | 四川大学 | Underflow type step absorption basin energy-dissipating system |
| CN104594493A (en) * | 2015-01-23 | 2015-05-06 | 中水北方勘测设计研究有限责任公司 | Circulating water outfall structure for thermal power plant |
| CN104594493B (en) * | 2015-01-23 | 2016-08-17 | 中水北方勘测设计研究有限责任公司 | Circulating-water in thermal power plant drain structure for water |
| CN106120673A (en) * | 2016-06-30 | 2016-11-16 | 四川大学 | The turning spillway being applicable under high Froude number |
| CN107288105A (en) * | 2017-07-11 | 2017-10-24 | 浙江省水利水电勘测设计院 | A kind of special-shaped block energy-dissipating structure |
| CN108842734A (en) * | 2018-08-13 | 2018-11-20 | 中国电建集团华东勘测设计研究院有限公司 | Band blocks water the stilling pond or cushion pool of pier |
| CN109339006A (en) * | 2018-12-05 | 2019-02-15 | 张迈 | A kind of efficient bevel-type waterpower stilling pool slab and its construction method |
| CN109339006B (en) * | 2018-12-05 | 2023-11-21 | 张迈 | Efficient cone-type hydraulic power absorption well and construction method thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHINA ELECTRIC POWER CONSTRUCTION GROUP BEIJING SU Free format text: FORMER NAME: HYDROCHINA BEIJING ENGINEERING CORPORATION LIMITED Owner name: HYDROCHINA BEIJING ENGINEERING CORPORATION LIMITED Free format text: FORMER NAME: HYDROCHINA BEIJING ENGINEERING CORPORATION |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 100024 Beijing city Chaoyang District, 1 West Street Patentee after: POWERCHINA BEIJING ENGINEERING Corp.,Ltd. Address before: 100024 Beijing city Chaoyang District, 1 West Street Patentee before: HYDROCHINA BEIJING ENGINEERING Corp.,Ltd. Address after: 100024 Beijing city Chaoyang District, 1 West Street Patentee after: HYDROCHINA BEIJING ENGINEERING Corp.,Ltd. Address before: 100024 Beijing city Chaoyang District, 1 West Street Patentee before: HYDROCHINA BEIJING ENGINEERING Corp. |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20131030 Effective date of abandoning: 20150520 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20131030 Effective date of abandoning: 20150520 |
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| RGAV | Abandon patent right to avoid regrant |