CN102691280A - Multistage sliding ladder and stilling pool combined energy dissipater used for soft foundation section - Google Patents
Multistage sliding ladder and stilling pool combined energy dissipater used for soft foundation section Download PDFInfo
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- CN102691280A CN102691280A CN2012101928174A CN201210192817A CN102691280A CN 102691280 A CN102691280 A CN 102691280A CN 2012101928174 A CN2012101928174 A CN 2012101928174A CN 201210192817 A CN201210192817 A CN 201210192817A CN 102691280 A CN102691280 A CN 102691280A
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Abstract
The invention discloses a multistage sliding ladder and stilling pool combined energy dissipater used for a soft foundation section. The energy dissipator is characterized in that at least one multistage sliding ladder and stilling pool combined energy dissipater is arranged along a water release structure built on the soft foundation section; the final-stage sliding ladder of the multistage sliding ladder of each energy dissipator is connected with a stilling pool; the slope of each-stage sliding ladder is less than or equal to 1:5; and the flowing direction of water flow at the tail end of each-stage sliding ladder is basically and approximately horizontal. In the energy dissipator, the slope of the multistage sliding ladder is smaller, the water velocity is not high, and the flowing direction of water flow at the tail end of each-stage sliding ladder is basically and approximately horizontal, so that the water flow in the stilling pool connected with the multistage sliding ladder is prevented from turbulence, and thus only can the problem that the soft foundation section can not directly adopt the existing ladder and stilling pool energy dissipation mode be solved, but also the safe operation of a flood-releasing structure can be ensured; and the excavation of a soft foundation can be greatly reduced, and the engineering investment can be saved.
Description
Technical field
The invention belongs to that outlet structure escape works are specifically related to a kind of multistage slippage ladder and absorption basin combined energy dissipater that is used for the soft base section along journey energy dissipater technical field in the Hydraulic and Hydro-Power Engineering.
Background technology
In Hydraulic and Hydro-Power Engineering; The current of under outlet structure escape works, letting out all have bigger energy; Energy for fear of current causes bigger influence to building and downstream river course; Usually form energy dissipation by hydraulic jump, perhaps adopt the mode of choosing stream that current are chosen certain position, downstream, utilize the strong shear action between downstream water body and the flip shot current to come energy dissipating at the terminal absorption basin that adopts of outlet structure escape works.
In recent years; To water velocity big (generally speaking water velocity greater than 15 ~ 20m/s) and the gradient steep (generally speaking; The gradient is suddenly in 1: 5) the free flow outlet structure escape works, also have employing that the base plate of outlet structure escape works is made the ladder form, to increase the turbulent fluctuation of current; Thereby consume the energy of a part of current along journey, to alleviate the energy dissipating pressure at lower exit place.But if water velocity is too little, the inertia of current is also just less, at this moment because of gravity plays a major role, so revolving of current bottom rolled also just not strongly, is provided with that ladder can not obviously increase the turbulent fluctuation of current and the purpose that reaches energy dissipating.
In addition, in some cases, existing these energy dissipating modes all can not directly adopt; Such as building Hydraulic and Hydro-Power Engineering in soft base (being non-solid rock) location, special in the place of deep covering layer, can cause more serious the washing away in downstream as adopting flip trajectory bucket; Can be violent and absorption basin is set because of flow turbulence in the absorption basin, particularly jump first section, bigger pressure fluctuation meter can appear; The soft base section can damage under the vibration effect of pressure fluctuation meter; And use the ladder energy dissipating because of the water velocity and the gradient are had certain requirement, the soft base section also can damage more greatly because of flow turbulence under this water velocity and gradient situation.
Summary of the invention
The objective of the invention is directly to be used for the present situation of soft base section, a kind of multistage slippage ladder and absorption basin combined energy dissipater that can directly be used for the soft base section is provided to existing energy dissipater.
Multistage slippage ladder and the absorption basin combined energy dissipater that is used for the soft base section provided by the invention; The outlet structure escape works that it is characterized in that on the section of soft base, building are along being provided with at least one multistage slippage ladder and absorption basin combined energy dissipater in the journey; The afterbody slippage ladder of each energy dissipater's multistage slippage ladder links to each other with absorption basin; And each grade slippage ladder gradient≤1: 5, and make current be tending towards level basically at the terminal flow direction of each grade slippage ladder.
When the water velocity in the normal runner increases to 12 ~ 15m/s; Multistage slippage ladder provided by the invention and absorption basin combined energy dissipater just can be set; From upstream flow flow process downstream, the energy that it was gathered is consumed at current; Outlet structure escape works are from upstream in the whole stream section in downstream, and the current in the normal runner keep lower flow velocity, even can keep the unhurried current state.
Because each grade slippage ladder gradient of multistage slippage ladder all designs less than 1: 5 in the combined energy dissipater provided by the invention; Thereby can make current through each grade ladder the time, all impact phenomenon can occur on the one hand; Thereby make streamline generation acute variation, on each grade ladder, all consume part energy, also can on ladder, form hydraulic jump (when flow is identical sometimes in addition; Ladder Duan Yuehuan forms hydraulic jump more easily; The gradient one timing, the more little hydraulic jump that forms more easily of flow), can further increase the energy consumption on each grade ladder; On the other hand because of also making current be tending towards level basically at the terminal flow direction of each grade slippage ladder; This just both can guarantee that impacting or forming the hydraulic jump phenomenon appearred in current through the next stage ladder time, can guarantee that again the flow direction of current when getting into absorption basin also is basic horizontal, and make hydraulic jump not close on the absorption basin base plate; Pulsation and the Chun of its current is moving to occur in above zone in the middle of the water body and let, thereby current are to the effect of absorption basin building bottom when having reduced energy dissipating.
Though the gradient is slow more; The effect of energy dissipation of each grade is good more; But construction costs can increase to some extent; Thereby gentle incline needs to confirm with the topographic and geologic situation according to the requirement of conveyance capacity, studies according to the inventor, and the gradient that generally can reach each grade slippage ladder of multistage slippage ladder among the energy dissipater of above-mentioned effect is 1: 5 ~ 20.In actual engineering, can combine to confirm after the combined factors analyses such as topographic and geologic situation, construction costs, effect of energy dissipation the concrete size of the gradient.
The multistage slippage ladder that is provided with among the energy dissipater of the present invention can consume a part of flow energy; But because water velocity is less; The energy that each grade ladder consumes is less, also maybe be still bigger in the speed of the terminal current of multistage slippage ladder, and this is just by the further energy dissipating of the absorption basin that is provided with thereafter.
Multistage slippage ladder and the absorption basin combined energy dissipater that is used for the soft base section provided by the invention can also take following measure to come further to guarantee its safety and energy dissipating: the first, as far as possible it is arranged in the thin place of covering layer; Second; Along the journey segmentation a plurality of multistage slippage ladders and absorption basin combined energy dissipater are set at outlet structure escape works; Thereby reduce the energy dissipating pressure of each multistage slippage ladder and absorption basin combined energy dissipater; The pulsation of current is moving with Chun when reducing energy dissipating, guarantee the interior water velocity of the normal runner of each section all in control range (less than 12 ~ 15m/s).
The present invention compared with prior art has following good effect:
1, because multistage slippage ladder provided by the invention and absorption basin combined energy dissipater are to be used for the soft base section; Thereby not only solved the energy dissipating mode that the soft base section can not directly adopt existing ladder and absorption basin, also a kind of new energy dissipater's form is provided for the energy dissipating of the outlet structure escape works that shed repair is built in the soft base.
2, owing to the gradient of multistage slippage ladder in multistage slippage ladder provided by the invention and the absorption basin combined energy dissipater is less; Just be provided with when the water velocity in normal runner increases to 12 ~ 15m/s in addition; Thereby the destruction of having avoided the prior art slope anxious flow turbulence of steep water to bring for the soft base section more greatly little impact of dynamics or hydraulic jump phenomenon only can appear.
3, because the present invention not only also is provided with the absorption basin combined energy dissipation behind multistage slippage ladder; And also require the terminal flow direction of each grade slippage ladder to be tending towards level basically; Thereby both can alleviate the energy dissipating pressure of multistage slippage ladder; Can not cause the interior flow turbulence of absorption basin violent again, particularly jump first section, avoid the soft base section under the vibration effect of pressure fluctuation meter, to damage.
4, since the outlet structure escape works that can on the section of soft base, build of the present invention along the energy dissipater that a plurality of multistage slippage ladders and absorption basin are united is set in the journey; Thereby can be with total energy relatively dispersedly at outlet structure escape works along consuming in the journey; Avoid all concentration of energy consumption; Therefore can reduce the energy dissipating difficulty greatly, alleviate the destruction that building brings because of structure stress.
5, because the present invention can local preferably multistage slippage ladder and the absorption basin combined energy dissipater that is provided with consumes along certain a bit of little concentration of energy of gathering in the journey to geological conditions with outlet structure escape works; Thereby make other normal runner position of living in; Current are very little to the influence of overcurrent building wall; Basically only have vertical pressure, and the pulsating quantity of pressure is also very small, this has not only guaranteed the safe operation of flood releasing structure; Can significantly reduce excavation again, save construction investment weak basis.
Description of drawings
The outlet structure escape works that Fig. 1 builds on the section of soft base for the embodiment of the invention 1 are along the structural representation of one that is provided with in the journey multistage slippage ladder and absorption basin combined energy dissipater;
The outlet structure escape works that Fig. 2 builds on the section of soft base for the embodiment of the invention 2 are along the structural representation of two that are provided with in the journey multistage slippage ladders and absorption basin combined energy dissipater.
The specific embodiment
Provide embodiment and the present invention is specifically described below in conjunction with accompanying drawing.Be necessary to be pointed out that at this following examples only are used for the present invention is described further; Can not be interpreted as restriction to protection domain of the present invention; Some nonessential improvement and adjustment that the professional and technical personnel in this field makes according to the content of the invention described above still belong to protection scope of the present invention.
Embodiment 1
As shown in Figure 1; Multistage slippage ladder that is used for the soft base section that present embodiment provides and absorption basin combined energy dissipater are the outlet structure escape works on the section of soft base, built multistage slippage ladder and the absorption basin combined energy dissipater along setting in the Cheng Zhengchang runner; The afterbody slippage ladder of this energy dissipater's multistage slippage ladder 1 links to each other with absorption basin 2; And each grade slippage ladder gradient is 1: 5, and makes current be tending towards level basically at the terminal flow direction of each grade slippage ladder.
As shown in Figure 1; Multistage slippage ladder that is used for the soft base section that present embodiment provides and absorption basin combined energy dissipater are the outlet structure escape works on the section of soft base, built multistage slippage ladder and the absorption basin combined energy dissipater along setting in the Cheng Zhengchang runner; The afterbody slippage ladder of this energy dissipater's multistage slippage ladder 1 links to each other with absorption basin 2; Each grade slippage ladder gradient of different with embodiment 1 is present embodiment is 1: 20, and makes current be tending towards level basically at the terminal flow direction of each grade slippage ladder.
Embodiment 3
As shown in Figure 2, multistage slippage ladder that is used for the soft base section that present embodiment provides and absorption basin combined energy dissipater are the outlet structure escape works on the section of soft base, built two multistage slippage ladders and the absorption basin combined energy dissipater along setting in the Cheng Zhengchang runner.The afterbody slippage ladder of each energy dissipater's multistage slippage ladder 1 links to each other with absorption basin 2, and each grade slippage ladder gradient is 1: 10, and makes current be tending towards level basically at the terminal flow direction of each grade slippage ladder.
Claims (2)
1. the multistage slippage ladder and the absorption basin combined energy dissipater that are used for the soft base section; The outlet structure escape works that it is characterized in that on the section of soft base, building are along being provided with at least one multistage slippage ladder and absorption basin combined energy dissipater in the journey; The afterbody slippage ladder of each energy dissipater's multistage slippage ladder links to each other with absorption basin; And each grade slippage ladder gradient≤1: 5, and make current be tending towards level basically at the terminal flow direction of each grade slippage ladder.
2. multistage slippage ladder and the absorption basin combined energy dissipater that is used for the soft base section as claimed in claim 1 is characterized in that the gradient of each grade slippage ladder of the multistage slippage ladder of each energy dissipater is 1: 5 ~ 20.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210192817.4A CN102691280B (en) | 2012-06-13 | 2012-06-13 | For multi-stage slide ladder and the absorption basin combined energy dissipater of soft base section |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210192817.4A CN102691280B (en) | 2012-06-13 | 2012-06-13 | For multi-stage slide ladder and the absorption basin combined energy dissipater of soft base section |
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| CN102691280A true CN102691280A (en) | 2012-09-26 |
| CN102691280B CN102691280B (en) | 2015-08-26 |
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| CN201210192817.4A Expired - Fee Related CN102691280B (en) | 2012-06-13 | 2012-06-13 | For multi-stage slide ladder and the absorption basin combined energy dissipater of soft base section |
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Cited By (3)
| 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 |
| CN104213545A (en) * | 2014-09-11 | 2014-12-17 | 四川大学 | Suspended underflow type gradient stilling basin energy dissipation system |
| US11768002B2 (en) | 2013-11-22 | 2023-09-26 | Ademco Inc. | Systems and methods to control a communication rate between a thermostat and a cloud based server |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2331093A1 (en) * | 1998-05-05 | 1999-11-11 | Frederick J. Kauppi | Hydraulic energy dissipating offset stepped spillway |
| CN101195999A (en) * | 2007-10-30 | 2008-06-11 | 四川大学 | Ladder energy dissipater with doped gas device preposed |
| CN101349047A (en) * | 2008-09-04 | 2009-01-21 | 四川大学 | Aeration type curve ladder energy dissipater in flood discharge hole |
| CN202073075U (en) * | 2011-05-09 | 2011-12-14 | 广东省水利水电科学研究院 | Discontinuous convex type step energy dissipater |
-
2012
- 2012-06-13 CN CN201210192817.4A patent/CN102691280B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2331093A1 (en) * | 1998-05-05 | 1999-11-11 | Frederick J. Kauppi | Hydraulic energy dissipating offset stepped spillway |
| CN101195999A (en) * | 2007-10-30 | 2008-06-11 | 四川大学 | Ladder energy dissipater with doped gas device preposed |
| CN101349047A (en) * | 2008-09-04 | 2009-01-21 | 四川大学 | Aeration type curve ladder energy dissipater in flood discharge hole |
| CN202073075U (en) * | 2011-05-09 | 2011-12-14 | 广东省水利水电科学研究院 | Discontinuous convex type step energy dissipater |
Cited By (5)
| 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 |
| US11768002B2 (en) | 2013-11-22 | 2023-09-26 | Ademco Inc. | Systems and methods to control a communication rate between a thermostat and a cloud based server |
| CN104213545A (en) * | 2014-09-11 | 2014-12-17 | 四川大学 | Suspended underflow type gradient stilling basin energy dissipation system |
| CN104213545B (en) * | 2014-09-11 | 2016-08-17 | 四川大学 | Hang underflow type step stiling basin energy-dissipating system |
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| CN102691280B (en) | 2015-08-26 |
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