CN202247817U - Efficient underflow-type energy dissipating facility - Google Patents
Efficient underflow-type energy dissipating facility Download PDFInfo
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- CN202247817U CN202247817U CN2011203717380U CN201120371738U CN202247817U CN 202247817 U CN202247817 U CN 202247817U CN 2011203717380 U CN2011203717380 U CN 2011203717380U CN 201120371738 U CN201120371738 U CN 201120371738U CN 202247817 U CN202247817 U CN 202247817U
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- absorption basin
- stilling basin
- basin
- depth
- base plate
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Abstract
The utility model relates to an efficient underflow-type energy dissipating facility used for ensuring the safety performance of hydraulic and hydroelectric engineering hub buildings for dams and sluices, which comprises a stilling basin connected between the outlet of a sluicing building and a downstream river and formed by long sidewalls on the two sides of the stilling basin and a base plate. The tail outlet segment of the stilling basin is transversely provided with a tail sill and the top surface of the tail sill is higher than the base plate of the stilling basin. The length of each long sidewall of the stilling basin is set to be L and the distance between the tail sill and the inlet end of the stilling basin is set to be Lk. L and Lk satisfy the relationship of L = Lk + (0.5-1.2) hT, wherein hT is the conjugate depth of the stilling basin or the water depth of the stilling basin in front of the tail sill. A reverse-slope section channel base plate with the slope ratio thereof to be 1: 8 - 10 is arranged between the tail sill of the stilling basin and the outlet end of the stilling basin. The efficient underflow-type energy dissipating facility is reasonable in structural design and easy to implement, which effectively improves the conjugate depth of the stilling basin so as to realize the smooth transition of the water flow. Meanwhile, the engineering cost and the fund investment on flood-prevention projects for downstream rivers are also reduced and the social and economic benefits of water conservancy and hydropower engineering are improved.
Description
Technical field
The utility model content belongs to water conservancy and hydropower process facility technology field, relates to a kind of high-effect underflow type energy-dissipating installation that is used to ensure Hydraulic and Hydro-Power Engineering pivot building thing safety such as dam, sluice.
Background technology
In Hydraulic and Hydro-Power Engineering is built; Flood-discharge energy-dissipating is one of its main key technology or great technical barrier all the time; This is not only because the cost of flood-discharge energy-dissipating building accounts for engineering soil and builds about 1/3rd of valency; Simultaneously also because to deal carefully with the flood-discharge energy-dissipating problem be the following sluicing stream degradation riverbed that prevents to carry huge energy, the river levee even make outlet structure escape works receive erosion damage of destroying by rush of water, thus jeopardize the important way of the safety of pivot building things such as dam, sluice.One of main task of outlet structure escape works downstream waterpower design just is to select and calculate suitable energy dissipating measure; Make it to eliminate complementary energy in than short distance in downstream; And make down the high speed concentrated flow of letting out change the normal unhurried current in downstream safely into, to guarantee the safety of building.
In the prior art, traditional energy dissipating measure mainly contains the underflow type energy dissipating, chooses three kinds of basic energy dissipating modes of streaming energy dissipating and the energy dissipating of surface current formula.Wherein, the underflow type energy dissipating is the position by means of certain engineering measure control hydraulic jump, and the surperficial whirlpool that takes place through hydraulic jump rolls with strong turbulent fluctuation eliminates complementary energy.Practice shows, the underflow type energy dissipating has not only that fluidised form is more clearly, tail water relatively steadily, less, the downstream of fogging degree wash away characteristics such as lighter, and the effect of energy dissipation of hydraulic jump is very significant.Therefore, the numerous relatively poor all kinds of outlet structure escape works of sluice, middle-size and small-size overfall dam, high water head outlet structure escape works and geological conditions in this area adopt the underflow type energy-dissipating installation more at present, have also obtained comparatively significant social economic benefit.
When utilizing the underflow type energy dissipating, for obtaining comparatively ideal economic benefit and effect of energy dissipation preferably, the engineering measure of the control hydraulic jump position of taking mainly contains two kinds: 1) reduce the protection-apron elevation, make and form absorption basin in downstream; 2) build the energy dissipating bank at the protection-apron end and come banked-up water level, make the preceding absorption basin that forms of bank; In addition, above-mentioned two kinds of measures are combined or the effect that auxiliary energy dissipater also can play control hydraulic jump position, improve energy dissipation rate is set in absorption basin, also got application comparatively widely in practice.
In the textbook and relevant design manual that design about disspation through hydraudic jimp facility waterpower in the past; Mainly introduce the absorption basin degree of depth and methods of length calculation; Owing in waterpower is calculated, do not consider that absorption basin abutment wall length is to the hydraulic jump position effects; Thereby, mention never also how absorption basin abutment wall length is confirmed and the bridging mode of absorption basin outlet and downstream channel (base plate).In actual engineering; The designer confirms its abutment wall length by absorption basin length (being the spacing of absorption basin entrance point to tail bank) merely; And when absorption basin was connected with the downstream waste canal, the channel base plate then was designed to the suitable slope of level or level of approximation behind the tail bank.Above-mentioned design form seems and meets convention, often has following deficiency or defective: 1) the absorption basin build is difficult to satisfy the requirement of all operation conditions; 2) in the big illusion that causes the absorption basin degree of depth or curtailment often of flow; 3) form the effect that does not embody downstream water depth on the principle to greatest extent from hydraulic jump; 4) often not good because of its build, and cause engineering cost to increase; 5) water surface secondary falls relatively largely behind the absorption basin, causes downstream river course or channel water level fluctuation bigger, thereby increases the investment that downstream river course protection or canal dike are increased.
The utility model content
The purpose of the utility model is the problem that prior art exists is solved, and provides that a kind of project organization is reasonable, engineering cost is low, easy enforcement, can effectively improve the jump back depth of water and make the mild high-effect underflow type energy-dissipating installation of current transition of absorption basin.
Be used to realize that the technical solution of foregoing invention purpose is such: the high-effect underflow type energy-dissipating installation that is provided comprises that one is connected and between outlet structure escape works outlets and downstream river course, forms absorption basin by long abutment wall in both sides and base plate; Be horizontally set with one end face at absorption basin afterbody outlet section place high protruding in the tail bank of absorption basin base plate, and the tail bank is L apart from the distance of absorption basin entrance point
k, the length of the long abutment wall of absorption basin does
L＝L
k+(0.5～1.2)h
T，
H in the formula
TBe the absorption basin depth of water before the back depth of water or the absorption basin tail bank that jumps, h
T=σ
jH "
c, σ wherein
jFor flooding coefficient, its span is 1.05～1.10, h "
cBe absorption basin necked-down section depth of water h
cConjugate depth, h "
c≤h
T
The technical solution of the utility model also comprises: between absorption basin tail bank to the absorption basin port of export, be provided with the slope than being 1: the adverse grade section channel base plate of m, m=8～10.
The high-effect underflow type energy-dissipating installation that the utility model proposes is on traditional absorption basin outlet build basis; To embody hydraulic principle to greatest extent is theory; Propose to the different bridging modes of absorption basin outlet with downstream river course; Its innovative point has two aspects: the one, and the terminal aspect, tail bank position relatively of absorption basin abutment wall; Because the traditional relatively absorption basin of its abutment wall is longer,, utilizes the method for prolongation absorption basin abutment wall can eliminate or alleviate absorption basin and jump afterwards that the current water surface falls absorption basin depth of water h so be called the long abutment wall build of absorption basin
TInfluence; The 2nd, absorption basin outlet sluice way base plate build aspect, downstream; Because there is a base plate adverse grade section in its tail bank downstream; So be called absorption basin outlet adverse grade build, it is through the variation of the discharge area in the certain-length of absorption basin tail bank downstream, realizes the variation of flow rate of water flow and fluidised form in this section; Thereby reach the smooth transition of absorption basin current and downstream river course or waste canal current, eliminate or alleviate absorption basin after water surface secondary fall the water level fluctuation that is caused.As far as two kinds of bridging modes of absorption basin and downstream river course, two innovative points of this patent both can adopt separately, also can unite utilization; Be that the long abutment wall build of absorption basin both had been applicable to that the absorption basin outlet through changeover portions joining with the river course " river channel type is connected " such as aprons, was applicable to that again absorption basin is through water-break open channel joining with downstream river course " channeltype is connected "; Absorption basin outlet adverse grade build then mainly is applicable to " channeltype linking ".When practical application, the two both can separate independent employing long abutment wall build of absorption basin and absorption basin outlet adverse grade build, also can unite utilization, decided according to concrete engineering.
Compared with prior art, the major advantage of the utility model is: the long abutment wall build of absorption basin that (1) this energy-dissipating installation adopts can effectively improve the absorption basin back depth of water that jumps, and helps the formation of desirable hydraulic jump, the effect of energy dissipation of raising disspation through hydraudic jimp; (2) the long abutment wall build of absorption basin that adopts can make the length of traditional absorption basin or the degree of depth reduce, and practices thrift engineering cost; (3) the absorption basin outlet adverse grade build that adopts can reduce the absorption basin exit velocity, slows down the secondary that the pond current water surface and falls, and makes the current transition steady; (4) the absorption basin outlet adverse grade build that adopts can reduce the water level fluctuation of its downstream current, thereby reduces the flood control investment in downstream channel or river course.(5) project organization of the utility model is simple, implements easily, can significantly improve the economic results in society of Hydraulic and Hydro-Power Engineering.
Description of drawings
Fig. 1 is the side direction structural representation of a specific embodiment of the utility model.
Fig. 2 bows to the plane structure sketch map for Fig. 1's.
Fig. 3 is the fundamental diagram of the utility model.
The specific embodiment
Below will combine accompanying drawing that the utility model content is further specified, but the practical implementation form of the utility model is not limited in following embodiment.
Referring to accompanying drawing; The described high-effect underflow type energy-dissipating installation of the utility model comprises that one is formed absorption basin by long abutment wall in both sides 1 and base plate; Be horizontally set with one end face at absorption basin afterbody outlet section place high protruding in the tail bank 2 of absorption basin base plate, and the length L of the long abutment wall of absorption basin=tail bank is L apart from the distance of absorption basin entrance point
k+ (0.5～1.2) h
T, h wherein
T=σ
jH "
c,, flood factor sigma for the absorption basin depth of water before the back depth of water or the absorption basin tail bank that jumps
jSpan be 1.05～1.10, h "
cBe the absorption basin necked-down section depth of water (h
c) conjugate depth, h "
c≤h
TBetween absorption basin tail bank 2 to the absorption basin port of export, be provided with the slope than being 1: the adverse grade section channel base plate (m=8～10) of m, formation can make jump back current and downstream river course especially export the adverse grade build with the absorption basin of waste canal water flow stationary transition.
Claims (2)
1. high-effect underflow type energy-dissipating installation; Comprise that one is connected and between outlet structure escape works outlets and downstream river course, forms absorption basin by long abutment walls in both sides (1) and base plate; It is high protruding in the tail bank (2) of absorption basin base plate to it is characterized in that being horizontally set with at absorption basin afterbody outlet section place one end face, and tail bank (2) is L apart from the distance of absorption basin entrance point
k, the length of the long abutment wall of absorption basin does
L＝L
k+(0.5～1.2)h
T，
H in the formula
TBe the absorption basin depth of water before the back depth of water or the absorption basin tail bank that jumps, h
T=σ
jH "
c, σ wherein
jFor flooding coefficient, its span is 1.05～1.10, h "
cBe absorption basin necked-down section depth of water h
cConjugate depth, h "
c≤h
T
2. high-effect underflow type energy-dissipating installation according to claim 1 is characterized in that between absorption basin tail bank (2) to the absorption basin port of export, being provided with the slope than being 1: the adverse grade section channel base plate of m, m=8～10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203717380U CN202247817U (en) | 2011-09-30 | 2011-09-30 | Efficient underflow-type energy dissipating facility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203717380U CN202247817U (en) | 2011-09-30 | 2011-09-30 | Efficient underflow-type energy dissipating facility |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202247817U true CN202247817U (en) | 2012-05-30 |
Family
ID=46109079
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203717380U Expired - Fee Related CN202247817U (en) | 2011-09-30 | 2011-09-30 | Efficient underflow-type energy dissipating facility |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306249A (en) * | 2013-07-08 | 2013-09-18 | 中国水电顾问集团成都勘测设计研究院 | Flow channel outlet structure of flood discharge surface hole of high arch dam |
| CN103397619A (en) * | 2013-07-25 | 2013-11-20 | 中国长江三峡集团公司 | High- and low-sill stilling basin with function of on-way dispersive energy dissipation |
| CN109881644A (en) * | 2018-11-15 | 2019-06-14 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of secondary stilling basin design method suitable for low Freund number energy dissipating |
| CN111945682A (en) * | 2020-09-14 | 2020-11-17 | 大连理工大学 | Energy dissipation pool with inverted triangular wedge tail pier |
-
2011
- 2011-09-30 CN CN2011203717380U patent/CN202247817U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306249A (en) * | 2013-07-08 | 2013-09-18 | 中国水电顾问集团成都勘测设计研究院 | Flow channel outlet structure of flood discharge surface hole of high arch dam |
| CN103306249B (en) * | 2013-07-08 | 2016-05-04 | 中国电建集团成都勘测设计研究院有限公司 | The runner exit structure in a kind of high arch dam flood-discharge table hole |
| CN103397619A (en) * | 2013-07-25 | 2013-11-20 | 中国长江三峡集团公司 | High- and low-sill stilling basin with function of on-way dispersive energy dissipation |
| CN109881644A (en) * | 2018-11-15 | 2019-06-14 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of secondary stilling basin design method suitable for low Freund number energy dissipating |
| CN111945682A (en) * | 2020-09-14 | 2020-11-17 | 大连理工大学 | Energy dissipation pool with inverted triangular wedge tail pier |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20120930 |