CN103410129A - Multistage step drop energy dissipater structure - Google Patents
Multistage step drop energy dissipater structure Download PDFInfo
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Abstract
The invention relates to a multistage step drop energy dissipater structure which comprises a flow relief channel, a multistage step drop structure, a stilling pool, a stilling pool tail step and a downstream apron. The tail end of the flow relief channel is connected to the top end of the multistage step drop structure. The bottom end of the multistage step drop structure is connected with the stilling pool. Certain height difference exists between the tail end of the flow relief channel and the base plate of the stilling pool. The bottom of the multistage step drop structure is level with the base plate of the stilling pool which is connected with the downstream apron through the stilling pool tail step. By the multistage step drop energy dissipater structure, water flow turbulence is enhanced, energy dissipation effect is increased, hydraulic indexes in the stilling pool can be reduced, water flow pulsation in the stilling pool is reduced, and the novel energy dissipation device is provided for high-water-head high-flow release buildings. In addition the multistage step drop energy dissipater structure is easy to build and well suitable for upstream continuous or multi-strand flow release.
Description
Technical field
The present invention relates to the hydraulic engineering field of flood-discharge energy-dissipating facility, particularly a kind of multistage notch cuttype that is applicable to high water head, large flow in a kind of flood control-discharge dyke engineering falls bank combination energy dissipating construction.
Background technology
The high dam engineering multidigit of China is in western high mountain gorge area, common feature aspect flood-discharge energy-dissipating is " head is high, flow is large, flood discharge power is large, river valley is narrow, complex geologic conditions ", the flood-discharge energy-dissipating technical difficulty is large, existing problems are outstanding, usually follow some special current phenomenons, thereby Design of Discharge Dissipation, safe operation problem are the hot issues be concerned about of Hydraulic and Hydro-Power Engineering circle in recent years always.Disspation through hydraudic jimp due to have fluid stable, atomization impact little, be not subjected to the advantage such as geological conditions restriction, be subject to the favor of medium and small project always.
Yet because geographical energy dissipating jet faces the problems such as the end, underflow speed be very high, application is limited in large hydraulic engineering.Chinese patent ZL200820081250.2 discloses a kind of sudden expansion and has fallen bank type disspation through hydraudic jimp work structure on conventional disspation through hydraudic jimp work basis, be characterized in having falling bank, having the sudden expansion of certain distance in the horizontal direction of abutment wall of certain vertical height downwards at dredging flow groove end absorption basin base plate, reduce the hydraulic indexes at base plate and abutment wall place, improved energy dissipation rate; China Patent Publication No. be CN101215828A Patent Application Publication a kind of high and low ridge underflow stilling basin, be characterized in that by lower sluicing flow point be multi-strand flow, by the height bank, leak into downstream, high bank is adopted to suitable angle of throat in the plane, thereby improve effect of energy dissipation.Yet, though these energy-dissipating structures can reduce hydraulic indexes to a certain extent, but a large amount of concrete research shows to adopt to expand, fall type energy dissipater water and flow into behind pond the backflow that has varying strength and vertical shaft whirlpool [Huanghai Sea is gorgeous, Zhang Qiang, Wang Haijun. expand the experimental study fall type disspation through hydraudic jimp work hydraulic characteristic(s). Chinese countryside water conservancy and hydropower .2010 the 7th phase: 86-87], thereby the scour caused, entrainment with the high flowing pressure produced and upwarp and cause the building heavy damage.As can be seen here, conventional disspation through hydraudic jimp application limitation is larger; The effect of energy dissipation that the prior art measures such as increase its supplementary devices produce is not very desirable or outlet structure escape works is threatened.How to solve disspation through hydraudic jimp is applied in engineering limitation, this is task of the present invention place just.
In sum, provide a kind of and be applicable to that head is high, flow is large, flood discharge power is large, river valley is narrow, the flood-discharge energy-dissipating facility that is easy to build of complex geologic conditions, becomes those skilled in the art's problem demanding prompt solution.
The information that is disclosed in this background of invention technology part only is intended to deepen the understanding to general background technology of the present invention, and should not be regarded as admitting or imply that in any form this information structure has been prior art known in those skilled in the art.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of combination energy dissipating construction that is applicable to high water head, large discharge per unit width is provided, not only meets the requirement of disspation through hydraudic jimp, and can reduce the hydraulic indexes in absorption basin, and increased the turbulent fluctuation of current, significantly improved energy dissipating efficiency.
In order to achieve the above object, the invention provides a kind of multistage notch cuttype and fall bank combination energy dissipating construction, it comprises: dredging flow groove, multistage ladder falls the bank structure, absorption basin, absorption basin tail bank and downstream apron, the end of described dredging flow groove connects the top that described multistage ladder falls the bank structure, described multistage ladder falls bank structure bottom and is connected with described absorption basin, the end of described dredging flow groove and described absorption basin base plate exist certain altitude poor, it is equal with the absorption basin base plate that described multistage ladder falls the bottom surface of bank structure, described absorption basin is connected with described downstream apron by described absorption basin tail bank.
Preferably, the difference in height of the end of described dredging flow groove and described absorption basin base plate is H, and the scope that described multistage ladder falls the length L of bank structure is H～2H.
Preferably, described combination energy dissipating construction comprises partition wall, and described partition wall is arranged at intervals in described dredging flow groove, and described partition wall separates described dredging flow groove along the segmentation of described dredging flow groove width.
Preferably, the length of described partition wall equals the length of described dredging flow groove, and it is continuous on its width that described multistage ladder falls the bank structure, and the lower sluicing stream of described dredging flow groove falls in bank structure continuum and enters described absorption basin through described multistage ladder.
Preferably, described combination energy dissipating construction comprises dividing pier, described dividing pier is arranged at intervals at described multistage ladder and falls in the bank structure, be that described dividing pier falls described multistage ladder to the bank structure and separates along the width segmentation that described multistage ladder falls the bank structure, the length of described dividing pier is greater than the length that described multistage ladder falls the bank structure, and the lower sluicing stream of described dredging flow groove falls the bank structure through described multistage ladder and is divided into multiply and injects described absorption basin.
Preferably, described dividing pier is provided with pier nose and pier tail, and described pier nose is set to semicircle, and described semicircular diameter equals the thickness of described dividing pier.
Preferably, described combination energy dissipating construction comprises partition wall and dividing pier, described partition wall is arranged at intervals in described dredging flow groove, described dividing pier is arranged at intervals at described multistage ladder and falls in the bank structure, described dividing pier is connected with described partition wall, be that described dividing pier and described partition wall are setting continuously, described dividing pier is identical respectively with thickness with the quantity of described partition wall.
Preferably, described dividing pier is provided with the pier tail, and described pier tail is set to streamlined.
The invention has the beneficial effects as follows:
1, with respect to traditional disspation through hydraudic jimp work, notch cuttype of the present invention combination energy dissipater has increased the elevation of dredging flow groove, reaches the effect that reduces hydraulic indexes in absorption basin, for the outlet structure escape works of high water head, large flow provide a kind of novel energy-dissipating installation.
2, notch cuttype energy dissipater dredging flow groove end of the present invention is provided with hierarchic structure, has aggravated flow turbulence, has improved effect of energy dissipation, and has avoided dredging flow groove and the poor scour caused of absorption basin floor elevation, the destruction such as entrainments.
3, notch cuttype energy dissipater dredging flow groove end of the present invention is provided with hierarchic structure, lower sluicing stream is by entering absorption basin after the ladder section, avoid current directly to impact the absorption basin base plate, reduced the flow fluctuation in absorption basin, ensured safe operation and the application life of earial drainage building.
4, cabinet-type hierarchic structure makes the current share split enter pond, and the partition wall afterbody is provided with streamlined pier tail, can avoid the vertical shaft whirlpool that dispersion of flow produces to destroy.
5, notch cuttype of the present invention combination energy dissipating construction is simple, be easy to build, to upstream continuously or the multiply earial drainage all have applicability preferably.
The accompanying drawing explanation
By Figure of description and the specific embodiment that is used from subsequently explanation the present invention some principle with Figure of description one, the further feature that the present invention has and advantage will become clear or more specifically be illustrated.
Fig. 1 is the floor map of the embodiment of the present invention 1, and hierarchic structure adopts continuous type.
Fig. 2 is the elevational schematic view of the embodiment of the present invention 1, and hierarchic structure adopts continuous type.
Fig. 3 is the floor map of the embodiment of the present invention 2, and hierarchic structure adopts cabinet-type.
Fig. 4 is the elevational schematic view of the embodiment of the present invention 2, and hierarchic structure adopts cabinet-type.
Fig. 5 is the partial enlarged drawing of hierarchic structure of the present invention.
Fig. 6 is the floor map of the embodiment of the present invention 3, and hierarchic structure adopts cabinet-type.
Fig. 7 is the elevational schematic view of the embodiment of the present invention 3, and hierarchic structure adopts cabinet-type.
Main symbol description in figure
1-dredging flow groove
2-partition wall
22-dividing pier
3-multistage ladder falls the bank structure
4-absorption basin
5-absorption basin tail bank
6-downstream apron
The length of L-hierarchic structure
The discrepancy in elevation of the end of H-dredging flow groove and absorption basin base plate
The length of a-pier tail
The thickness of b-dividing pier or partition wall
The width of w-each ladder
The height of h-each ladder.
Should understand, Figure of description might not show concrete structure of the present invention pari passu, and be used to the n-lustrative feature that some principle of the present invention is described, also can take the technique of painting of slightly simplifying in Figure of description.Specific design feature of the present invention disclosed herein for example comprises that concrete size, direction, position and profile will be partly will be applied and the environment of use is determined by concrete.
In several accompanying drawings of Figure of description, identical Reference numeral means the identical or part that is equal to of the present invention.
The specific embodiment
A lot of details have been set forth in the following description so that fully understand the present invention.But the present invention can implement much to be different from alternate manner described here, those skilled in the art can be in the situation that do similar popularization without prejudice to intension of the present invention, so the present invention is not subjected to the restriction of following public specific embodiment.
Below, by reference to the accompanying drawings specific embodiments of the invention are described.
Refer to Fig. 1 to shown in Figure 5, the invention provides a kind of multistage notch cuttype and fall bank combination energy dissipating construction, it comprises: dredging flow groove 1, partition wall 2 or dividing pier 22, multistage ladder fall bank structure 3, absorption basin 4, absorption basin tail bank 5 and downstream apron 6.
In specific embodiment, described partition wall 2 is arranged at intervals at described dredging flow groove 1 or described dividing pier 22 and is arranged at described multistage ladder and falls in bank structure 3, the end of described dredging flow groove 1 connects the top that described multistage ladder falls bank structure 3, described multistage ladder falls bank structure 3 bottoms and is connected with described absorption basin 4, the end of described dredging flow groove 1 and described absorption basin 4 base plates exist certain altitude poor, it is equal with absorption basin 4 base plates that described multistage ladder falls the bottom surface of bank structure 3, and described absorption basin 4 is connected with described downstream apron 6 by described absorption basin tail bank 5.The difference in height of the end of described dredging flow groove 1 and described absorption basin 4 base plates is H, and the scope that described multistage ladder falls the length L of bank structure 3 is H～2H.
Multistage notch cuttype of the present invention falls bank combination energy dissipater dredging flow groove and is applicable to the upstream dredging flow groove and goes out to flow two kinds of forms for going out continuously stream and multiply, and the size related in the present invention can be carried out value according to actual concrete condition.
Multistage notch cuttype of the present invention falls bank combination energy dissipating construction, comprises that dredging flow groove 1, multistage ladder fall bank structure 3, absorption basin 4, absorption basin tail bank 5 and downstream apron 6.Wherein, dredging flow groove 1 curved surface is traditional earial drainage curved surface, terminal horizontal.When described multistage notch cuttype falls bank combination energy dissipating construction while not comprising partition wall 2, dredging flow groove 1 is let out mode under continuously, and the jet of generation is solid jet; When described multistage notch cuttype falls bank combination energy dissipating construction while comprising partition wall 2, dredging flow groove 1 is let out mode under multiply, and the jet of generation is multiple jets.There are certain depth displacement in dredging flow groove 1 end and absorption basin base plate.
The downstream of dredging flow groove 1 connects the top that multistage ladder falls bank structure 3, and multistage ladder falls bank structure 3 and is divided into continuous type and two kinds of forms of cabinet-type.Namely fall bank combination energy dissipating construction while not comprising dividing pier 22 when described multistage notch cuttype, multistage ladder falls bank structure 3 and let out mode under continuously, and the jet of generation is solid jet; When described multistage notch cuttype falls bank combination energy dissipating construction while comprising dividing pier 22, multistage ladder falls bank structure 3 and lets out mode under multiply, and the jet of generation is multiple jets.
It is that continuous ladder falls bank that the multistage ladder of continuous type falls bank structure 3 its overflow surfaces, enters absorption basin 4 in lower sluicing stream continuum.The multistage ladder of cabinet-type is provided with a plurality of dividing piers in the middle of falling bank structure 3, and multiple jets disperses to enter absorption basin 4.
In certain embodiments, dividing pier 22 is provided with pier nose 24 and pier tail 23, and pier nose 24 is semicircle, and pier nose 24 diameters are the thickness of dividing pier 22, and pier tail 23 is set to streamlined, and pier tail 23 length are 1.5～2 times of dividing pier 22 thickness.In certain embodiments, when dredging flow groove 1 goes out to flow mode for multiply, dividing pier 22 is overlapped with the partition wall 2 of dredging flow groove 1, pier nose 24 no longer is set.
Below, by reference to the accompanying drawings specific embodiments of the invention are described.
Multistage notch cuttype in following examples falls bank combination energy dissipater to be tested in the some hydropower station multi-purpose project.
Fig. 1 shows the floor map that multistage notch cuttype falls bank combination energy dissipater's embodiment 1.Fig. 2 is the elevational schematic view of the embodiment of the present invention 1.
As shown in Figure 1, at spacer structure described in the embodiment of the present invention 12, be partition wall 2.Described partition wall 2 separates the width segmentation of described dredging flow groove 1 along described dredging flow groove.As shown in Figure 1, the length of described partition wall 2 equals the length of described dredging flow groove 1, and it is continuous on its width that described multistage ladder falls bank structure 3, and the lower sluicing stream of described dredging flow groove 1 falls in bank structure 3 continuums and enters described absorption basin 4 through described multistage ladder.
As shown in Figure 2, in embodiment 1, the terminal horizontal of dredging flow groove 1, there are depth displacement H=9m in dredging flow groove 1 end outlet and absorption basin 4 base plates.The end of dredging flow groove 1 connects multistage ladder and falls bank structure 3, and multistage ladder falls bank structure 3 and adopts continuous type, enters in absorption basin 4 in the lower sluicing stream continuum of upstream dredging flow groove 1.The first order step that described multistage ladder falls bank structure 3 starts from the end of dredging flow groove 1, the base plate of absorption basin 4 finally, and the length L that described multistage ladder falls bank structure 3 is got 16m.Each ladder width w=2m and height h=1.5m.Described multistage ladder falls bank structure 3 schematic diagrames as shown in Figure 5.The wide 60m of absorption basin 4, the long 150m of absorption basin 4.
Fig. 3 shows the floor map that multistage notch cuttype falls bank combination energy dissipater's embodiment 2.Fig. 4 is the elevational schematic view of the embodiment of the present invention 2.
In the embodiment of the present invention 2, described spacer structure 2 is dividing pier 22, described dividing pier 22 is arranged at intervals at described multistage ladder and falls in the middle of bank structure 3, and namely described dividing pier 22 falls described multistage ladder to bank structure 3 and separates along the width segmentation that described multistage ladder falls bank structure 3.As shown in Figure 3, the length of described dividing pier 22 is greater than the length that described multistage ladder falls bank structure 3, and the lower sluicing stream of described dredging flow groove 1 falls bank structure 3 through described multistage ladder and is divided into multiply and injects in described absorption basin 4.As shown in Figure 4, described dividing pier 22 is provided with pier nose 24 and pier tail 23 in the present embodiment, and described pier nose 24 is set to semicircle, and described semicircular diameter R equals the thickness of described dividing pier 22.Described semicircle diameter R=4m in the present embodiment, the length of described pier tail is a=6m.
Fig. 6 shows the floor map that multistage notch cuttype falls bank combination energy dissipater's embodiment 3.Fig. 7 is the elevational schematic view of the embodiment of the present invention 3.
In the embodiment of the present invention 3, as shown in Figure 6, described spacer structure 2 comprises partition wall 2 and dividing pier 22, described partition wall 2 is arranged at intervals at described dredging flow groove 1, described dividing pier 22 is arranged at intervals at described multistage ladder and falls in the middle of bank structure 3, described dividing pier 22 is connected with described partition wall 2, and namely described dividing pier 22 is to arrange continuously with described partition wall 2, and described dividing pier 22 is identical respectively with quantity and the thickness of described partition wall 2.Described dividing pier 22 is provided with pier tail 23, and described pier tail 23 is set to streamlined.Described H equals 9m, and the width that described multistage ladder falls each ladder of bank structure 3 is w=2m height w=2m, and the width of described absorption basin is that 60m length is 150m.Described L equals 16m.
As shown in Figure 7, in the present embodiment, dredging flow groove 1 terminal horizontal, there are depth displacement H=9m in dredging flow groove 1 end outlet and absorption basin 4 base plates.Dredging flow groove 1 end connects multistage ladder and falls bank structure 3, and multistage ladder falls bank structure 3 and adopts cabinet-types, and the lower sluicing stream of upstream dredging flow groove 1 falls bank structure 3 through multistage ladder and is divided into multiple jets and disperses interval to enter in absorption basin 4, and elevational schematic view as shown in Figure 7.The first order step that multistage ladder falls bank structure 3 starts from the end of dredging flow groove 1, the base plate of absorption basin 4 finally.In the present embodiment, multistage ladder falls the length L=16m of bank structure 3.Multistage ladder arranges a plurality of dividing piers 22 in the middle of falling bank structure 3, and described dividing pier 22 is provided with the pier tail, and the thickness of dividing pier 23 is b=4m, and pier tail 23 is set to streamlined, length a=6m.In the present embodiment, dredging flow groove 1 goes out the stream mode for multiply, and described dividing pier 23 overlaps with the partition wall 2 of one-level dredging flow groove 1, and pier nose no longer is set.Multistage ladder falls bank structure 3 as schematic diagram as shown in Figure 5.The wide 60m of absorption basin 4, the long 150m of absorption basin 4.
Machine simulated condition contrast test is found as calculated, multistage notch cuttype falls bank combination energy dissipater to be compared with traditional disspation through hydraudic jimp work, has greatly improved energy dissipating efficiency, has reduced absorption basin base plate underflow speed and pressure, and main flow mixing energy dissipation section obviously shortens, and has reduced the absorption basin effective length.
Above-described embodiment is for illustrative principle of the present invention and effect thereof, but the present invention is not limited to above-mentioned embodiment.Those skilled in the art all can, under spirit of the present invention and category, in the claim protection domain, modify to above-described embodiment.Therefore protection scope of the present invention, should cover as claims of the present invention.
Claims (8)
1. a multistage notch cuttype falls bank combination energy dissipating construction, it is characterized in that, comprise: dredging flow groove (1), multistage ladder falls bank structure (3), absorption basin (4), absorption basin tail bank (5) and downstream apron (6), the end of described dredging flow groove (1) connects the top that described multistage ladder falls bank structure (3), described multistage ladder falls bank structure (3) bottom and is connected with described absorption basin (4), the end of described dredging flow groove (1) and described absorption basin (4) base plate exist certain altitude poor, it is equal with absorption basin (4) base plate that described multistage ladder falls the bottom surface of bank structure (3), described absorption basin (4) is connected with described downstream apron (6) by described absorption basin tail bank (5).
2. multistage notch cuttype according to claim 1 falls bank combination energy dissipating construction, it is characterized in that: the difference in height of the end of described dredging flow groove (1) and described absorption basin (4) base plate is H, and the scope that described multistage ladder falls the length L of bank structure (3) is H～2H.
3. multistage notch cuttype according to claim 2 falls bank combination energy dissipating construction, it is characterized in that: described combination energy dissipating construction comprises partition wall (2), described partition wall (2) is arranged at intervals in described dredging flow groove (1), and described partition wall (2) separates the width segmentation of described dredging flow groove (1) along described dredging flow groove (1).
4. multistage notch cuttype according to claim 3 falls bank combination energy dissipating construction, it is characterized in that: the length of described partition wall (2) equals the length of described dredging flow groove (1), it is continuous on its width that described multistage ladder falls bank structure (3), and the lower sluicing stream of described dredging flow groove (1) falls in bank structure (3) continuum and enters described absorption basin (4) through described multistage ladder.
5. multistage notch cuttype according to claim 2 falls bank combination energy dissipating construction, it is characterized in that: described combination energy dissipating construction comprises dividing pier (22), described dividing pier (22) is arranged at intervals at described multistage ladder and falls in bank structure (3), be that described dividing pier (22) falls described multistage ladder to bank structure (3) and separates along the width segmentation that described multistage ladder falls bank structure (3), the length of described dividing pier (22) is greater than the length that described multistage ladder falls bank structure (3), the lower sluicing stream of described dredging flow groove (1) falls bank structure (3) through described multistage ladder and is divided into multiply and injects described absorption basin.
6. multistage notch cuttype according to claim 5 falls bank combination energy dissipating construction, it is characterized in that: described dividing pier (22) is provided with pier nose (24) and pier tail (23), described pier nose (24) is set to semicircle, and described semicircular diameter equals the thickness of described dividing pier (22).
7. multistage notch cuttype according to claim 2 falls bank combination energy dissipating construction, it is characterized in that: described combination energy dissipating construction comprises partition wall (2) and dividing pier (22), described partition wall (2) is arranged at intervals in described dredging flow groove (1), described dividing pier (22) is arranged at intervals at described multistage ladder and falls in bank structure (3), described dividing pier (22) is connected with described partition wall (2), be that described dividing pier (22) is setting continuously with described partition wall (2), described dividing pier (22) is identical respectively with thickness with the quantity of described partition wall (2).
8. multistage notch cuttype according to claim 7 falls bank combination energy dissipating construction, and it is characterized in that: described dividing pier (22) is provided with pier tail (23), and described pier tail (23) is set to streamlined.
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| CN108442340A (en) * | 2018-02-09 | 2018-08-24 | 杨凌职业技术学院 | A kind of three-dimensional whole-section aeration bank |
| CN109629535A (en) * | 2018-11-27 | 2019-04-16 | 中水淮河规划设计研究有限公司 | A kind of combined energy dissipater |
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| CN103410129B (en) | 2015-09-30 |
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