CN101851911B - Rectification facility arranged at tail end of outlet of dam spillway short-open-flow section - Google Patents
Rectification facility arranged at tail end of outlet of dam spillway short-open-flow section Download PDFInfo
- Publication number
- CN101851911B CN101851911B CN2010101997940A CN201010199794A CN101851911B CN 101851911 B CN101851911 B CN 101851911B CN 2010101997940 A CN2010101997940 A CN 2010101997940A CN 201010199794 A CN201010199794 A CN 201010199794A CN 101851911 B CN101851911 B CN 101851911B
- Authority
- CN
- China
- Prior art keywords
- water
- outlet
- flow section
- short
- tail end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Sewage (AREA)
- Barrages (AREA)
Abstract
The invention discloses a rectification facility arranged at the tail end of an outlet of a dam spillway short-open-flow section. The rectification facility is composed of triangular wedges which are symmetrically arranged at two sides at the tail end of the outlet of the dam spillway short-open-flow section so that a water flow passage is gradually narrowed in a downward and water-outlet direction. In the invention, the triangular wedges can transversely narrow and longitudinally stretch water flow in the flow passage, thus reducing unit discharge of water entered when nappe enters a downstream water cushion, increasing energy dissipation effect, restraining water flow not to arouse obvious water wings while being longitudinal stretched to achieve more stable nappe; and under the same condition, compared with the facility adopting a flaring pier, the water level elevation of the outlet is greatly reduced so as to avoid a damming phenomenon due to over-high water surface, thus not affecting the discharge capacity of a spillway.
Description
Technical field
The invention belongs to energy dissipating and reduce the rectification facilities technical field of current, be specifically related to a kind of terminal rectification facilities of the short free flow section outlet in dam body table hole that is arranged on cushion pool base plate or riverbed impact.
Background technology
During the high dam flood-discharge energy-dissipating, wish overflow is disperseed entry as far as possible, thereby reduce the discharge per unit width of entry place, improve the energy dissipation rate of unit of water body, reduce the impact of current, reduce the water velocity on the absorption basin base plate, to satisfy need of real project to cushion pool base plate or riverbed.
Can need increase construction investment greatly with current from playing the purpose that subregion disperses entry though build flood discharging tunnel or flood spillway away from letting out under the different sections, the downstream of dam.In addition, when this mode was concentrated for the current entry of the big flow of sub-thread, energy dissipating also had difficulties, and therefore usually adopted some technical measures that the sub-thread current laterally or are vertically being elongated to reduce the discharge per unit width of entry place.Because the current that in narrow river course the overflow horizontal proliferation produced can impact two sides, high dam is built mostly in narrow river valley in addition, therefore adopts overflow more in the technical measures of vertically elongating.
With the technical measures of overflow in vertical elongation, adopt flaring gate pier at dam body table Kong Zhongchang, particularly in gravity dam, use comparatively extensive, this mainly is owing to the length of table hole spillwag chute in the gravity dam is longer, flaring gate pier can be arranged on the higher place of water velocity, thereby overflow can vertically fully stretched.
But when on the table hole of arch dam, using flaring gate pier, because the length in table orifice flow road is generally lacked (as shown in Figure 1), its outlet is less with the discrepancy in elevation of reservoir water level, comes the longitudinal stretching overflow as at its end flaring gate pier being set, when head hour, because flow velocity is still less, therefore overflow is not obvious at longitudinal stretching, and effect is bad, when flow is big, because be subjected to the resistance effect of flaring gate pier, the water surface is raised also may influence discharge capacity.
Moreover, adopt flaring gate pier also to have the another one problem, asymmetric or when being disturbed when incoming flow, the current of both sides can shrink and cause asymmetric to the centre, thereby can produce unstable water wing, make the fluidised form instability, the water wing may impact the building on next door when serious, though can offset the asymmetric influence of incoming flow by the both sides flaring gate pier being designed to asymmetrical form in the engineering, but the concrete bodily form is only effective in a certain water level range, still can occur unstable water wing when reservoir water level changes greatly.
Summary of the invention
The objective of the invention is defective, a kind of terminal rectification facilities of the short free flow section outlet in dam body table hole that is arranged on is provided, make current can in vertical the elongation, not evoke tangible water wing again in vertical elongation by its arrangement at the prior art existence.
A kind of terminal rectification facilities of the short free flow section outlet in dam body table hole that is arranged on provided by the invention, this rectification facilities is to be made of the triangle sphenoid that the short free flow section in dam body table hole exports terminal bilateral symmetry setting, so that water stream channel narrows downwards and to the water outlet direction gradually.
Above-mentioned triangle sphenoid is surrounded by four gores, drift angle A is positioned at the base plate of inflow direction one side and the intersection of side wall, one of them gore pastes mutually with side wall, and its excess-three gore is then formed to base plate direction and water outlet direction progressive additive to the terminal entity face of outlet by the hypotenuse that is affixed on gore top on the side wall.
Because it is terminal that the triangle sphenoid rectification facilities of the present invention's design is arranged on the outlet of free flow section, and along base plate and water outlet direction progressive additive, water stream channel is narrowed gradually, thereby can make the horizontal constriction of current quilt in runner, in vertical elongation, both reached and adopted existing flaring gate pier to make overflow in vertical elongation, reduce the entry discharge per unit width, increase the purpose of effect of energy dissipation, avoided the problem that adopts existing flaring gate pier to be brought again.
Because the triangle sphenoid rectification facilities of the present invention's design is to place the outlet of free flow section terminal, wherein a limit above the triangle sphenoid is increased gradually along the water outlet direction and is thickened, thereby but confinement of flow makes it not evoke tangible water wing when vertically elongating, make overflow more stable, and make under the same conditions, compare with the employing flaring gate pier, the water level elevation in exit reduces greatly, avoid herein the water surface too high and the Yong Shui phenomenon occurs, therefore do not influenced the discharge capacity in dam body table hole.
Description of drawings
Fig. 1 is for being provided with the side-looking structural representation of flaring gate pier in the arch dam body table hole;
The side-looking structural representation of the triangle sphenoid that Fig. 2 is provided with in arch dam body table hole for the present invention;
Fig. 3 is the plan structure schematic diagram of Fig. 4;
The perspective view of the triangle sphenoid that Fig. 4 is provided with in arch dam body table hole for the present invention.
The specific embodiment
Providing embodiment below in conjunction with accompanying drawing further specifies so that the present invention is made; but given embodiment can not be interpreted as limiting the scope of the invention, thereby nonessential improvement and adjustment that the professional and technical personnel has done according to the content and the design philosophy of the invention described above also should belong to protection scope of the present invention.
Embodiment
Shown in Fig. 2,3,4, the dam body table hole terminal rectification facilities of short free flow section outlet that is arranged on that present embodiment provides is to be made of the triangle sphenoid 2 that dam body table hole 1 short free flow section exports terminal bilateral symmetry setting.This triangle sphenoid 2 is surrounded by four gores, drift angle A is positioned at the intersection of base plate 3 with the side wall 4 of inflow direction one side, one of them gore pastes mutually with side wall, its excess-three gore is then formed to base plate 3 directions and water outlet direction progressive additive to the terminal entity face of outlet by the hypotenuse that is affixed on gore top on the side wall 4, so that water stream channel narrows downwards and to the water outlet direction gradually.
Claims (1)
1. one kind is arranged on the terminal rectification facilities of the short free flow section outlet in arch dams body surface hole, this rectification facilities is to export triangle sphenoid (2) formation that terminal bilateral symmetry is provided with by the short free flow section in dam body table hole (1), so that water stream channel narrows downwards and to the water outlet direction gradually, described triangle sphenoid (2) is surrounded by four gores, drift angle A is positioned at the intersection of base plate (3) Yu the side wall (4) of inflow direction one side, one of them gore pastes mutually with side wall, and its excess-three gore is then formed to base plate (3) direction and water outlet direction progressive additive to the terminal entity face of outlet by the hypotenuse that is affixed on the last gore top of side wall (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101997940A CN101851911B (en) | 2010-06-13 | 2010-06-13 | Rectification facility arranged at tail end of outlet of dam spillway short-open-flow section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101997940A CN101851911B (en) | 2010-06-13 | 2010-06-13 | Rectification facility arranged at tail end of outlet of dam spillway short-open-flow section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101851911A CN101851911A (en) | 2010-10-06 |
| CN101851911B true CN101851911B (en) | 2011-11-30 |
Family
ID=42803581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101997940A Expired - Fee Related CN101851911B (en) | 2010-06-13 | 2010-06-13 | Rectification facility arranged at tail end of outlet of dam spillway short-open-flow section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101851911B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2825705A1 (en) * | 2012-03-14 | 2015-01-21 | Jouni Jokela | Hydraulic structure for water flow control |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900054A (en) * | 2012-10-25 | 2013-01-30 | 中国水电顾问集团北京勘测设计研究院 | River bank-like flood spillway |
| CN106120676B (en) * | 2016-08-23 | 2019-04-19 | 中国电建集团华东勘测设计研究院有限公司 | A kind of dam body table pore structure of High Concrete Dam |
| CN112962545A (en) * | 2021-02-08 | 2021-06-15 | 长江水利委员会长江科学院 | Collision energy dissipater structure with low slope water splashing strength and high energy dissipation efficiency |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1744185A1 (en) * | 1990-07-02 | 1992-06-30 | П. Р. Хлопенков | Spillway |
| CN100567650C (en) * | 2006-06-22 | 2009-12-09 | 河海大学 | A kind of aeration device of flat outlet structure escape works |
| CN101126232B (en) * | 2007-09-19 | 2010-09-01 | 中国水电顾问集团成都勘测设计研究院 | Arch dam flood-discharge energy-dissipating structure |
| CN101215828A (en) * | 2007-12-28 | 2008-07-09 | 中国水电顾问集团中南勘测设计研究院 | High and low ridge underflow stilling basin |
| CN101349046B (en) * | 2008-08-28 | 2010-08-18 | 四川大学 | Dam body narrow slit non-collision flood discharge energy dissipater form |
| CN101713183B (en) * | 2009-11-20 | 2011-07-20 | 四川大学 | Double-wing type combined trajectory energy dissipation structure |
-
2010
- 2010-06-13 CN CN2010101997940A patent/CN101851911B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2825705A1 (en) * | 2012-03-14 | 2015-01-21 | Jouni Jokela | Hydraulic structure for water flow control |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101851911A (en) | 2010-10-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104404926B (en) | Dam facing chooses the overfall dam of bank shunting energy dissipating | |
| CN101851911B (en) | Rectification facility arranged at tail end of outlet of dam spillway short-open-flow section | |
| CN203129107U (en) | Split-flow flow-deflecting energy dissipator | |
| CN103898882B (en) | Classified pool-inlet high-dam flood discharge energy dissipater for bottom flow and energy dissipating method | |
| CN101624818B (en) | Differential column-splitting inlet energy dissipater | |
| CN206591500U (en) | A kind of laterally-graded rectifier type stiling basin for river course of turning | |
| CN107190712B (en) | A kind of toe bank falls bank stiling basin formula underflow energy dissipator and design method | |
| CN101761057A (en) | Flood-discharging energy dissipater of hydroelectric project | |
| CN103182202A (en) | V-shaped pipe sedimentation tank device | |
| CN202530433U (en) | Flaring pier structure of flood discharge and energy dissipation system in hydraulic and hydro-power engineering | |
| CN101736718B (en) | Reversely bevelled flip bucket | |
| CN103669301B (en) | The height bank absorption basin of double-layer disperse energy dissipating | |
| CN201254714Y (en) | Suddenly enlarged and drop sill type underflow energy dissipating work structure | |
| CN103195016B (en) | Flow guiding ridge technology for controlling water flow of canal bend from being overhigh | |
| CN104695391A (en) | Diffusion type inverse step rectification and energy dissipation method and absorption basin | |
| CN204940222U (en) | A kind of bilateral vertical seam type fish channel structure | |
| CN102747713B (en) | fishway | |
| CN203755266U (en) | Flood discharge structure of high arch dam | |
| CN106013009B (en) | A kind of more counter-slope formula stiling basins | |
| CN205100180U (en) | Groove section bend structure is let out to spillway | |
| CN205975527U (en) | High concrete dam's dam body table pore structure | |
| CN103981842B (en) | Trapezoidal contraction outlet X-type flaring gate pier | |
| CN203821344U (en) | Forward water inlet and sand sluicing flush gallery structure of hydropower station | |
| CN101349046B (en) | Dam body narrow slit non-collision flood discharge energy dissipater form | |
| CN106120676B (en) | A kind of dam body table pore structure of High Concrete Dam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111130 Termination date: 20140613 |
|
| EXPY | Termination of patent right or utility model |