CN104179158B - A kind of stiling basin - Google Patents
A kind of stiling basin Download PDFInfo
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- CN104179158B CN104179158B CN201410455036.9A CN201410455036A CN104179158B CN 104179158 B CN104179158 B CN 104179158B CN 201410455036 A CN201410455036 A CN 201410455036A CN 104179158 B CN104179158 B CN 104179158B
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- stiling basin
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Abstract
The invention discloses a kind of stiling basin, it is desirable to provide a kind of effect of energy dissipation is good, the stiling basin that construction costs is low.It includes that tail bank, the middle part of described tail bank arrange breach, makes tail bank form concave shape；The 1/2～2/3 of a length of tail bank length of described breach, the height of described indentations bottom is the 0～1/2 of tail bank height.The present invention has more significantly effect to the dispersion of flow, is suitable for the change of large range of flow, it is possible to saves quantities, is a kind of novel energy dissipater's build.
Description
Technical field
The present invention relates to Hydraulic and Hydro-Power Engineering technical field, especially relate to the New Type Energy Dissipator build stiling basin of a kind of discharge construction.
Background technology
Stiling basin is to promote the stream energy-dissipating installation in downstream generation underflow type hydraulic jump that sluices under outlet structure escape works.By hydraulic jump, the torrent released by outlet structure escape works is changed into unhurried current, to eliminate the Energy Dissipation Modes of kinetic energy.Typically the kinetic energy of the lower stream that sluices can be eliminated 40%～70%, and protection-apron length can be shortened, be a kind of effectively energy-dissipating installation of economy.It has fluid stable, and effect of energy dissipation is preferable, to geological conditions and tail water luffing strong adaptability, the advantages such as tail water fluctuation is little.But there is earthwork evacuation amount in the construction of existing stiling basin and concrete square amount is relatively big, the deficiency that construction costs is higher.It addition, upper pond level is big to the drop of the first section that jumps, therefore at this, flow velocity is high, and when Froude number Fr is relatively low, the kinetic energy of dissipation is few, and complementary energy is many, and complementary energy is exactly mainly the potential energy that water depth after jump is expressed.Therefore, how energy dissipating load in stiling basin is transferred to downstream river course reducing left and right bank slope is washed away, while reducing soil stone excavated volume, reducing construction costs, the problem solving water depth after jump that complementary energy brought bigger is had important theory value and and engineering significance.
Summary of the invention
Instant invention overcomes shortcoming of the prior art, it is provided that a kind of effect of energy dissipation is good, the stiling basin that construction costs is low.
In order to solve above-mentioned technical problem, stiling basin of the present invention only arranges the stiling basin tail bank of suitably height in stiling basin afterbody arranged on left and right sides, and the mid portion at stiling basin afterbody main flow place does not set tail bank, only arranges the little bank of suitably height.Its hydraulics feature is: to going out water stream giving treatment in accordance with the tendency of pathological change; main flow is allowed directly to go out pond; main flow is washed away in the middle part of underwater bed; the hole that rushes formed adds the length of stiling basin virtually; make down to let out water energy to stop at stiling basin and downstream river course punching hole internal diabetes; current are chosen to surface by the tail bank of the left and right sides simultaneously, so make two sides side slope obtain good protection.The main flow that the little bank that the mid portion at stiling basin afterbody main flow place is arranged makes this position go out bottom water stream is provoked, and reduces and determines position, boundary wash away dynamic, enhances the stability after stiling basin tail bank, saved construction investment.
Concrete technical scheme is as follows:
A kind of stiling basin, including tail bank, the middle part of described tail bank arranges breach, makes tail bank form concave shape；The 1/2～2/3 of a length of tail bank length of described breach, the height of described indentations bottom is the 0～1/2 of tail bank height.
Preferably, the 1/2 of a length of tail bank length of described breach, the height of described indentations bottom is the 0～1/3 of tail bank height.
Preferably, described breach is positioned at side to the right in the middle part of tail bank.
Preferably, the cross section of described indentation, there is trapezoidal.
Preferably, the wall thickness of described indentation, there is less than the wall thickness of tail bank.
Compared with prior art, present invention have the advantage that
1, versatility is stronger, is applied basically for all power stations being provided with stiling basin type that the level of tail water is high.
2, reduce the quantities of concrete, saved construction investment, make two sides, left and right bank slope obtain good protection.
3, to going out water stream giving treatment in accordance with the tendency of pathological change, allowing main flow directly go out pond, main flow is to carrying out lumped scour in the middle part of underwater bed, and the hole that rushes of formation adds the length of stiling basin virtually, makes down to let out water energy and rushes hole inner dissipation at stiling basin and downstream.
4, give underwater bed by the energy dissipating load sharing originally wanting stiling basin to undertake, make stiling basin, the safety of dam is further ensured that.By contrast, either in bank stiling basin, fall energy dissipater's build such as ridge underflow stilling basin or flaring gate pier and all do not reach this effect of energy dissipation.
5, the mid portion at stiling basin afterbody main flow place arranges the little bank main flow that makes this position go out bottom the main flow of pond that breach formed and provokes, and reduces and determines position, boundary wash away dynamic, strengthens the stability after stiling basin tail bank.
6, tail bank is offered the stiling basin of breach and is had more significantly effect to the dispersion of flow, is suitable for the change of large range of flow, it is possible to save quantities, be a kind of novel energy dissipater's build.It has different energy dissipatings to conceive from flaring gate pier, and the latter is to improve the dose rate that disappears in stiling basin, and the former is transfer and dispersion stiling basin energy dissipating load, and it is to reducing cost tool significance.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the stiling basin plan structure schematic diagram of the present invention.
Fig. 2 is the stiling basin perspective view of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not paying creative work premise, broadly fall into the scope of protection of the invention.
Stiling basin shown in Fig. 1 and Fig. 2, including tail bank 1, the middle part of described tail bank 1 arranges breach 2, makes tail bank 1 form concave shape；The 1/2～2/3 of a length of tail bank 1 length of described breach 2, the height bottom described breach 2 is the 0～1/2 of tail bank 1 height, and as preferably, the 1/2 of a length of tail bank 1 length of described breach 2, the height bottom described breach 2 is the 1/3 of tail bank 1 height.
Wherein, described breach 2 is preferably located at side to the right in the middle part of tail bank, in order to use protection slope, left bank while the main flow bottom pond is provoked.Cross section at described breach 2 is trapezoidal, and the wall thickness at described breach 2 is less than the wall thickness of tail bank 1.
Stiling basin on certain test power station arranges the tail bank of this structure: this power station force reduction pool bottom to the dam crest discrepancy in elevation is 61m, the deep 8m of stiling basin, the long 80m in pond, and force reduction pool bottom and outlet protection-apron elevation are 292m.Arrange the stiling basin tail bank of high 8m on the left and right both sides of stiling basin afterbody, the mid portion at stiling basin afterbody main flow place forms breach, notch length b=36.5m, indentations bottom height 2m.
Model test shows that gap type stiling basin tail bank substantially reduces stiling basin load, and water depth after jump (punching hole) is obviously reduced, and dynamic determine washing away of position, boundary and is obviously reduced, and produces a desired effect.Originally the energy dissipating load sharing wanting stiling basin to undertake is given underwater bed by the present invention, makes stiling basin, the safety of dam is further ensured that.It can effectively reduce the quantities of concrete, saves construction investment, makes two sides, left and right bank slope obtain good protection.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (3)
1. a stiling basin, including tail bank (1), it is characterised in that: the middle part of described tail bank (1) arranges breach (2), makes tail bank (1) form concave shape；The 1/2 of a length of tail bank (1) length of described breach (2), the height of described breach (2) bottom is the 0～1/3 of tail bank (1) height, and described breach (2) is positioned at side to the right in the middle part of tail bank.
Stiling basin the most according to claim 1, it is characterised in that: the cross section at described breach (2) place is trapezoidal.
Stiling basin the most according to claim 1, it is characterised in that: the wall thickness at described breach (2) place is less than the wall thickness of tail bank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410455036.9A CN104179158B (en) | 2014-09-10 | 2014-09-10 | A kind of stiling basin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410455036.9A CN104179158B (en) | 2014-09-10 | 2014-09-10 | A kind of stiling basin |
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| Publication Number | Publication Date |
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| CN104179158A CN104179158A (en) | 2014-12-03 |
| CN104179158B true CN104179158B (en) | 2016-08-24 |
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| CN201410455036.9A Active CN104179158B (en) | 2014-09-10 | 2014-09-10 | A kind of stiling basin |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2450103C2 (en) * | 2010-07-27 | 2012-05-10 | ФГОУ ВПО "Кабардино-Балкарская государственная сельскохозяйственная академия" | Energy dissipator |
| CN203049551U (en) * | 2013-02-01 | 2013-07-10 | 中国水电顾问集团贵阳勘测设计研究院 | Overflow face energy dissipation structure for rock overflow cofferdam |
| CN203514274U (en) * | 2013-09-26 | 2014-04-02 | 中国长江三峡集团公司 | Crashing type combined underflow energy dissipater structure |
| CN204097976U (en) * | 2014-09-10 | 2015-01-14 | 中国电建集团昆明勘测设计研究院有限公司 | A kind of absorption basin |
-
2014
- 2014-09-10 CN CN201410455036.9A patent/CN104179158B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2450103C2 (en) * | 2010-07-27 | 2012-05-10 | ФГОУ ВПО "Кабардино-Балкарская государственная сельскохозяйственная академия" | Energy dissipator |
| CN203049551U (en) * | 2013-02-01 | 2013-07-10 | 中国水电顾问集团贵阳勘测设计研究院 | Overflow face energy dissipation structure for rock overflow cofferdam |
| CN203514274U (en) * | 2013-09-26 | 2014-04-02 | 中国长江三峡集团公司 | Crashing type combined underflow energy dissipater structure |
| CN204097976U (en) * | 2014-09-10 | 2015-01-14 | 中国电建集团昆明勘测设计研究院有限公司 | A kind of absorption basin |
Non-Patent Citations (1)
| Title |
|---|
| "表底孔与消力池联合消能水力学研究";陈端等;《人民长江》;20080131;第39卷(第1期);第56页第4节 * |
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| CN104179158A (en) | 2014-12-03 |
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