CN103981842A - X-shaped flaring pier of trapezoid shrinkage outlet - Google Patents
X-shaped flaring pier of trapezoid shrinkage outlet Download PDFInfo
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- CN103981842A CN103981842A CN201410217482.6A CN201410217482A CN103981842A CN 103981842 A CN103981842 A CN 103981842A CN 201410217482 A CN201410217482 A CN 201410217482A CN 103981842 A CN103981842 A CN 103981842A
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- pier
- section
- width
- lock hole
- base plate
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Abstract
The invention relates to an X-shaped flaring pier of a trapezoid shrinkage outlet. The pier is composed of two pier bodies which are identical in shape and structure. The two pier bodies are symmetrically installed in a discharging gate hole, an overflow channel composed of a top gate hole, a vertical shrinkage section and a bottom gate hole is formed between the two pier bodies, the section of the vertical shrinkage section is in the shape of an isosceles trapezoid, and the top width b1 of the isosceles trapezoid is smaller than the bottom width b2. The X-shaped flaring pier can reduce hydro-dynamic pressure and pulse value formed on a base plate of a stilling pool, especially the base plate on the ogee section at the pool inlet position after water flow on a water crown on the top falls into the stilling pool from the air, and safety of the base plate, especially the base plate on the ogee section at the pool inlet position is improved.
Description
Technical field
The invention belongs to Hydraulic and Hydro-Power Engineering flood-discharge energy-dissipating facility field, particularly a kind of X-type flaring gate pier.
Background technology
X-type flaring gate pier is that in Hydraulic and Hydro-Power Engineering, commonly use and flood-discharge energy-dissipating facility absorption basin cooperation.In the middle of traditional X-type flaring gate pier, vertically contraction section adopts unified shrinkage ratio, and its contraction section top width equates with bottom width.When this flaring gate pier flood discharge, on top, water hat flow strengthens, and water hat current are through dropping in the air after absorption basin, and at absorption basin base plate, the moving hydraulic pressure that especially enters the formation of anti-segmental arc base plate place, pond is larger by force, and pulsation is violent; Along with the increase of reservoir area head, flaring gate pier top upper water hat flow further increases with respect to the flow on overfull dam surface, strong and the pulsating quantity of moving hydraulic pressure that the anti-segmental arc base plate of absorption basin place forms acutely increases, thereby very easily cause the anti-segmental arc base plate of absorption basin to wash away unstable failure, bring about great losses to engineering.
Summary of the invention
The object of the invention is to the deficiency existing for traditional X-ray type flaring gate pier, a kind of trapezoidal contraction outlet X-type flaring gate pier is provided, aloft fall after absorption basin to reduce pushing up upper water hat current, at absorption basin base plate, especially enter the strong and pulsating quantity of moving hydraulic pressure that the anti-segmental arc base plate of Chi Chu forms, improve absorption basin base plate, especially enter the safety of the anti-segmental arc base plate of Chi Chu.
Trapezoidal contraction outlet X-type flaring gate pier of the present invention, two the pier bodies identical with structure by shape form, two pier body symmetries are arranged in earial drainage lock hole, between two pier bodies, form the flow channels being formed by lock hole, top, vertically contraction section and lock hole, bottom, the section of described vertical contraction section is isosceles trapezoid, the top width b of this isosceles trapezoid
1be less than bottom width b
2.
Trapezoidal contraction outlet X-type flaring gate pier of the present invention, the section in lock hole, described top is isosceles trapezoid, the bottom width of this isosceles trapezoid equals the top width b of vertical contraction section section
1, top width equals earial drainage lock hole width B (being greater than bottom width); The section in lock hole, described bottom is the combination of isosceles trapezoid and rectangle, and isosceles trapezoid is positioned on rectangle, and the top width of described isosceles trapezoid equals the bottom width b of vertical contraction section section
2, bottom width equals earial drainage lock hole width B (being greater than top width), the length of described rectangle equals earial drainage lock hole width B, width equals the bottom opening in lock hole, bottom apart from the height h of overfull dam surface
2.
Trapezoidal contraction outlet X-type flaring gate pier of the present invention, the top width b of its vertical contraction section isosceles trapezoid section
1with bottom width b
2the preferred b of ratio
1/ b
2=0.67～0.8, the shrinkage ratio ε in lock hole, bottom
2preferably ε
2=b
2/ B=0.35～0.55, ε
1=b
1/ B, in formula, B is earial drainage lock hole width.According to ε
2=b
2the bottom width b of vertical contraction section section can be determined in/B=0.35～0.55
2, then according to b
1/ b
2=0.67～0.8, can determine the top width b of vertical contraction section section
1.
Trapezoidal contraction outlet X-type flaring gate pier of the present invention, the overall height (d of its flow channels section
1+ d
2+ h
1+ h
2)=(1.0～1.2) H
max, in formula, H
maxfor maximal head on weir, d
1for lock hole, top height (pier body apical side height), d
2for the height of the vertical contraction section in centre, h
1for the height of pier body underflow face, h
2for the bottom opening in lock hole, bottom is apart from the height of overfull dam surface; Maximum height (the h of underflow identity distance overfull dam surface
1+ h
2)=3.0m～3.5m, h
2=1.5m～1.8m; X-type flaring gate pier tail end knuckle
be controlled at 16 °～24 °, in formula, L is the horizontal range that X-type flaring gate pier shrinks start point distance X-type flaring gate pier pier tail, b
2for the bottom width of vertical contraction section isosceles trapezoid section, B is earial drainage lock hole width.
Compared with prior art, the present invention has following beneficial effect:
1, because the top width of the vertical contraction section section of trapezoidal contraction outlet X-type flaring gate pier of the present invention is less than bottom width, present little, lower large isosceles trapezoid, thereby ensureing its discharge capacity, on overflow weir and the impregnable basis of flaring gate pier wall pressure, make to go out to flow longitudinal diffusion increase after lock, overflow drop point disperses, upstream face is long-pending to be increased greatly, having reduced top upper water hat current aloft falls after absorption basin, at absorption basin base plate, especially enter the strong and pulsating quantity of moving hydraulic pressure that the anti-segmental arc base plate of Chi Chu forms, model testing shows, under the identical gate method of operation, the moving hydraulic pressure that absorption basin enters the anti-segmental arc base plate of Chi Chu can reduce respectively 15%～30% with the more traditional X-type flaring gate pier of pulsation root-mean-square value by force, significantly improve absorption basin base plate, especially enter the pressure of the anti-segmental arc base plate of Chi Chu, the hydraulic characteristic(s) such as pressure fluctuation meter and flow-shape, the safety of engineering flood-discharge energy-dissipating and the application life of absorption basin are improved.
2, trapezoidal contraction outlet X-type flaring gate pier of the present invention is in the time of flood-discharge energy-dissipating, drop to current underflow speed horizontal proliferation angle in absorption basin larger, current horizontal proliferation is more abundant, and the inner blending energy dissipating of collision, shearing and current between adjacent lower sluicing stream increases, and has improved energy dissipation rate.
3, the up-narrow and down-wide new build of the trapezoidal contraction outlet vertical contraction section of X-type flaring gate pier of the present invention, shrink by end face on X-type flaring gate pier and the vertical gradual change of underflow face, can let out under carrying out with more excellent split ratio going out water seal stream, make to draw that water seal stream distributes more reasonable, the effect of X-type flaring gate pier each several part will better be brought into play, comprehensively improve the hydraulic characteristic(s) of current in overflow weir and absorption basin, for the optimization of X-type flaring gate pier build provides a kind of new technical scheme.
Brief description of the drawings
Fig. 1 is the structural representation of trapezoidal contraction outlet X-type flaring gate pier of the present invention.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is that the A-A of Fig. 1 is to view.
Fig. 4 is that trapezoidal contraction outlet X-type flaring gate pier of the present invention is combined flood-discharge energy-dissipating structure arrangement diagram with absorption basin.
Fig. 5 is the drawing of site of trapezoidal contraction outlet X-type flaring gate pier of the present invention in earial drainage lock hole.
In figure, end face, 7-pier body underflow face, 8-bottom opening, 9-overfull dam surface, 10-weir crest, 11-Segment gate, 12-absorption basin, d on the 1-the first pier body, the 2-the second pier body, lock hole, 3-top, 4-vertical contraction section, lock hole, 5-bottom, 6-pier body
1lock hole ,-top height (height of isosceles trapezoid section), d
2-vertically contraction section height (height of isosceles trapezoid section), h
1-pier body underflow face height, h
2the bottom opening in lock hole ,-bottom shrinks horizontal range, the b of start point distance X-type flaring gate pier pier tail apart from height, L-X-type flaring gate pier of overfull dam surface
1-vertically top width, the b of contraction section isosceles trapezoid section
2-vertically the bottom width of contraction section isosceles trapezoid section, B-earial drainage lock hole width.
Detailed description of the invention
Below by embodiment, the wide tail of trapezoidal contraction outlet X-type of the present invention is described further.Following examples are simulated experiments of trapezoidal contraction outlet X-type flaring gate pier.
Embodiment 1
In the present embodiment, the service condition of trapezoidal contraction outlet X-type flaring gate pier: maximal head H on weir
max=28.4m, letdown flow is 2017.00m
3/ s, downstream absorption basin tailwater level 555.60m.
Described in the present embodiment, trapezoidal contraction outlet X-type flaring gate pier as shown in Figures 1 to 3, formed by shape the first pier body 1 identical with structure and the second pier body 2, two pier body symmetries are arranged in earial drainage lock hole, flaring gate pier shrinks the horizontal range L=13.0m (seeing Fig. 5) of start point distance pier tail, the initial break location parameter of flaring gate pier: x=22.0m, y=8.0m (seeing Fig. 4).Between two pier bodies, form the flow channels being formed by lock hole, top 3, vertically contraction section 4 and lock hole, bottom 5.
The section of described vertical contraction section is isosceles trapezoid, the top width b of this isosceles trapezoid
1=4.0m, bottom width b
2=6.0m, b
1/ b
2=0.67, high d
2=15.57m; The section in lock hole, described top is isosceles trapezoid, the bottom width=vertically top width b of contraction section section of this isosceles trapezoid
1=4.0m, top width=earial drainage lock hole width B=15.0m, high d
1=10.07m, lock hole, top shrinkage ratio ε
1=b
1/ B=4.0/15.0=0.27; The section in lock hole, described bottom is the combination of isosceles trapezoid and rectangle, and isosceles trapezoid is positioned on rectangle, the top width=vertically bottom width b of contraction section section of described isosceles trapezoid
2=6.0m, bottom width=earial drainage lock hole width B=15.0m, the height h of height=pier body underflow face
1=1.5m, length=earial drainage lock hole width B=15.0m of described rectangle, the bottom opening in lock hole, width (highly)=bottom are apart from the height h of overfull dam surface
2=1.5m.X-type flaring gate pier flow channels section overall height d
1+ d
2+ h
1+ h
2=28.64m, tail end knuckle θ=19.09 °.
Be provided with the trapezoidal contraction outlet X-type flaring gate pier of structure and size described in the present embodiment, flow characteristics in its earial drainage lock hole and absorption basin all makes moderate progress: overflow weir and flaring gate pier wall pressure change little, but its earial drainage lock hole current increase along upper end face degree extending transversely, under current, let out in process aeration more abundant, longitudinal diffusion overflow drop point obviously moves downstream, effectively weaken time sluicing and flowed the impact that the anti-segmental arc of dam facing is caused, model testing shows, the moving hydraulic pressure of its anti-segmental arc base plate has reduced 20%～30% with the more traditional X-type flaring gate pier of pulsation root-mean-square value by force, significantly improve absorption basin base plate, especially enter the pressure of the anti-segmental arc base plate of Chi Chu, the hydraulic characteristic(s) such as pressure fluctuation meter and flow-shape.Meanwhile, drop to current underflow speed horizontal proliferation angle in absorption basin larger, current horizontal proliferation is more abundant, can increase collision between adjacent lower sluicing stream, shear energy dissipating, improves energy dissipation rate.In addition, up-narrow and down-wide vertical contraction section can be let out under carrying out with more excellent split ratio going out water seal stream, has comprehensively improved the hydraulic characteristic(s) of current in overflow weir and absorption basin.
Embodiment 2
In the present embodiment, the service condition of trapezoidal contraction outlet X-type flaring gate pier is identical with embodiment 1.
Described in the present embodiment, the structure of trapezoidal contraction outlet X-type flaring gate pier as shown in Figures 1 to 3, is the top width b of vertical contraction section isosceles trapezoid section with the difference of embodiment 1
1=4.8m, bottom width b
2=6.0m, b
1/ b
2=0.8.
Compared with embodiment 1, the trapezoidal contraction outlet vertical contraction section of X-type flaring gate pier top shrinkage degree in the present embodiment is smaller, thereby longitudinal diffusion degree compared with embodiment 1 slightly a little less than, but also weakened time destruction of sluicing stream to the anti-segmental arc of dam facing, the moving hydraulic pressure of its anti-segmental arc base plate has reduced 15%～20% with the more traditional X-type flaring gate pier of pulsation root-mean-square value by force.
Claims (2)
1. a trapezoidal contraction outlet X-type flaring gate pier, two the pier bodies identical with structure by shape form, two pier body symmetries are arranged in earial drainage lock hole, between two pier bodies, form the flow channels being formed by lock hole, top (3), vertically contraction section (4) and lock hole, bottom (5), be isosceles trapezoid by the section that it is characterized in that described vertical contraction section (4), the top width b of this isosceles trapezoid
1be less than bottom width b
2.
2. trapezoidal contraction exports X-type flaring gate pier according to claim 1, it is characterized in that the top width b of described vertical contraction section (4) isosceles trapezoid section
1with bottom width b
2ratio b
1/ b
2=0.67～0.8, the shrinkage ratio ε in lock hole, bottom (5)
2=b
2/ B=0.35～0.55, in formula, B is earial drainage lock hole width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410217482.6A CN103981842B (en) | 2014-05-21 | 2014-05-21 | Trapezoidal contraction outlet X-type flaring gate pier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410217482.6A CN103981842B (en) | 2014-05-21 | 2014-05-21 | Trapezoidal contraction outlet X-type flaring gate pier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103981842A true CN103981842A (en) | 2014-08-13 |
| CN103981842B CN103981842B (en) | 2016-02-03 |
Family
ID=51273995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410217482.6A Expired - Fee Related CN103981842B (en) | 2014-05-21 | 2014-05-21 | Trapezoidal contraction outlet X-type flaring gate pier |
Country Status (1)
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|---|---|
| CN (1) | CN103981842B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107190711A (en) * | 2017-04-28 | 2017-09-22 | 昆明理工大学 | A kind of combined energy dissipater of suitable high moisture head and small flow flood-discharge energy-dissipating |
| CN107653732A (en) * | 2017-09-08 | 2018-02-02 | 江苏理文造纸有限公司 | A kind of paper machine is dehydrated measuring system online |
| 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 |
Citations (3)
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| JPS56105012A (en) * | 1980-01-21 | 1981-08-21 | Marushima Suimon Seisakusho:Kk | Reducing device for energy |
| 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 |
| CN103290816A (en) * | 2013-06-21 | 2013-09-11 | 四川大学 | Side wall air-mixing type X-type flaring pier |
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2014
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Patent Citations (3)
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|---|---|---|---|---|
| JPS56105012A (en) * | 1980-01-21 | 1981-08-21 | Marushima Suimon Seisakusho:Kk | Reducing device for energy |
| 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 |
| CN103290816A (en) * | 2013-06-21 | 2013-09-11 | 四川大学 | Side wall air-mixing type X-type flaring pier |
Non-Patent Citations (3)
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| 尹进步等: "用于大单宽泄洪台阶坝面上的一种新型宽尾墩", 《西北水电》, no. 1, 31 December 2002 (2002-12-31), pages 44 - 46 * |
| 梁宗祥等: "X型宽尾墩体型设计方法探索", 《西北农林科技大学学报(自然科学版)》, vol. 36, no. 5, 31 May 2008 (2008-05-31) * |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107190711A (en) * | 2017-04-28 | 2017-09-22 | 昆明理工大学 | A kind of combined energy dissipater of suitable high moisture head and small flow flood-discharge energy-dissipating |
| CN107190711B (en) * | 2017-04-28 | 2019-04-12 | 昆明理工大学 | A kind of combined energy dissipater of suitable high moisture head and small flow flood-discharge energy-dissipating |
| CN107653732A (en) * | 2017-09-08 | 2018-02-02 | 江苏理文造纸有限公司 | A kind of paper machine is dehydrated measuring system online |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN103981842B (en) | 2016-02-03 |
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