CN103981842B - Trapezoidal contraction outlet X-type flaring gate pier - Google Patents
Trapezoidal contraction outlet X-type flaring gate pier Download PDFInfo
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- CN103981842B CN103981842B CN201410217482.6A CN201410217482A CN103981842B CN 103981842 B CN103981842 B CN 103981842B CN 201410217482 A CN201410217482 A CN 201410217482A CN 103981842 B CN103981842 B CN 103981842B
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- lock hole
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- flaring gate
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Abstract
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, the flow channels be made up of lock hole, top, vertically contraction section and lock hole, bottom is formed between two pier bodies, the section of described vertical contraction section is the top width b of isosceles trapezoid, this isosceles trapezoid
1be less than bottom width b
2.Described X-type flaring gate pier can reduce after top upper water hat current fall absorption basin aloft, at force reduction pool bottom, especially enters the strong and pulsating quantity of dynamic hydraulic pressure that pond place ogee section base plate formed, improves force reduction pool bottom, especially enter the safety of pond place ogee section base plate.
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 commonly use in Hydraulic and Hydro-Power Engineering with flood-discharge energy-dissipating facility that is absorption basin cooperation.Traditional X-type flaring gate pier center vertical contraction section adopts unified shrinkage ratio, and its contraction section top width is equal with bottom width.During this flaring gate pier flood discharge, water hat increased flow capacity on top, water hat current are after dropping into absorption basin in the air, and at force reduction pool bottom, the dynamic hydraulic pressure especially entering the formation of ogee section base plate place, pond is strong comparatively large, and pulsation is violent; Along with the increase of reservoir area head, on flaring gate pier top, water hat flow increases further relative to the flow on overfull dam surface, strong and the pulsating quantity of the dynamic hydraulic pressure that absorption basin ogee section base plate place is formed acutely increases, thus very easily cause absorption basin ogee section base plate to wash away unstable failure, bring about great losses to engineering.
Summary of the invention
The object of the invention is to the deficiency existed for traditional X-ray type flaring gate pier, a kind of trapezoidal contraction outlet X-type flaring gate pier is provided, to reduce after top upper water hat current fall absorption basin aloft, at force reduction pool bottom, especially the strong and pulsating quantity of dynamic hydraulic pressure that pond place ogee section base plate formed is entered, improve force reduction pool bottom, especially enter the safety of pond place ogee section base plate.
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, the flow channels be made up of lock hole, top, vertically contraction section and lock hole, bottom is formed between two pier bodies, the section of described vertical contraction section is the top width b of isosceles trapezoid, 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, and 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 height h of bottom opening apart from overfull dam surface that the length of described rectangle equals earial drainage lock hole width B, width equals lock hole, bottom
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
2preferred 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, the top width b of vertical contraction section section can be determined
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 center vertical contraction section, h
1for the height in pier body underflow face, h
2for the height of the bottom opening distance overfull dam surface in lock hole, bottom; 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
control 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 trapezoidal top width of shrinking the vertical contraction section section of outlet X-type flaring gate pier of the present invention is less than bottom width, present little, lower large isosceles trapezoid, thus at its discharge capacity of guarantee, on overflow weir and the impregnable basis of flaring gate pier wall pressure, go out to flow longitudinal diffusion after making lock to increase, overflow drop point disperses, upstream face is long-pending to be increased greatly, reduce after top upper water hat current fall absorption basin aloft, at force reduction pool bottom, especially the strong and pulsating quantity of dynamic hydraulic pressure that pond place ogee section base plate formed is entered, model testing shows, under the identical gate method of operation, the X-type flaring gate pier that dynamic hydraulic pressure is strong and pulsation root-mean-square value is more traditional that absorption basin enters pond place ogee section base plate can reduce 15% ~ 30% respectively, significantly improve force reduction pool bottom, especially the pressure of pond place ogee section base plate is entered, the hydraulic characteristic(s) such as pressure fluctuation meter and flow-shape, improve the safety of engineering flood-discharge energy-dissipating and the application life of absorption basin.
2, trapezoidal contraction outlet X-type flaring gate pier of the present invention is when flood-discharge energy-dissipating, the current underflow speed horizontal proliferation angle dropped in absorption basin is larger, current horizontal proliferation is comparatively abundant, and the adjacent lower collision between flowing that sluices, shearing and the inner blending energy dissipating of current increase, and improve energy dissipation rate.
3, trapezoidal contraction of the present invention exports the up-narrow and down-wide new build of the vertical contraction section of X-type flaring gate pier, shunk by the vertical gradual change of end face on X-type flaring gate pier and underflow face, let out under can carrying out going out water seal stream with more excellent split ratio, make to show that water seal flow assignment is more reasonable, to better play the effect of X-type flaring gate pier each several part, comprehensively improve the hydraulic characteristic(s) of current in overflow weir and absorption basin, for X-type flaring gate pier bodily form optimization provides a kind of new technical scheme.
Accompanying drawing explanation
Fig. 1 is the trapezoidal structural representation shrinking outlet X-type flaring gate pier of the present invention.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the A-A direction view of Fig. 1.
Fig. 4 is that trapezoidal contraction outlet X-type flaring gate pier of the present invention combines 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 height of bottom opening apart from overfull dam surface in lock hole ,-bottom, horizontal range, the b of L-X-type flaring gate pier contraction start point distance X-type flaring gate pier pier tail
1top width, the b of-vertical contraction section isosceles trapezoid section
2the bottom width of-vertical 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 trapezoidal simulated experiments of shrinking outlet X-type flaring gate pier.
Embodiment 1
In the present embodiment, trapezoidal service condition of shrinking 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.
Trapezoidal contraction outlet X-type flaring gate pier described in the present embodiment as shown in Figures 1 to 3, the first pier body 1 identical with structure by shape and the second pier body 2 form, two pier body symmetries are arranged in earial drainage lock hole, flaring gate pier shrinks the horizontal range L=13.0m (see Fig. 5) of start point distance pier tail, the initial break location parameter of flaring gate pier: x=22.0m, y=8.0m (see Fig. 4).The flow channels be made up of lock hole, top 3, vertically contraction section 4 and lock hole, bottom 5 is formed between two pier bodies.
The section of described vertical contraction section is the top width b of isosceles trapezoid, 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 top width b of the bottom width=vertical 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 bottom width b of the top width=vertical contraction section section of described isosceles trapezoid
2=6.0m, bottom width=earial drainage lock hole width B=15.0m, the height h in height=pier body underflow face
1the height h of=1.5m, the length=earial drainage lock hole width B=15.0m of described rectangle, the bottom opening distance overfull dam surface in width (highly)=lock hole, bottom
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 described in the present embodiment and size, flow characteristics in its earial drainage lock hole and absorption basin all makes moderate progress: overflow weir and the change of flaring gate pier wall pressure little, but its earial drainage lock hole current increase along upper end face degree extending transversely, aeration in process is let out more abundant under current, longitudinal diffusion overflow drop point is obviously vacillated dynamic downwards, effectively reduce the lower impact of flowing and dam facing ogee section being caused that sluices, model testing shows, the X-type flaring gate pier that dynamic hydraulic pressure is strong and pulsation root-mean-square value is more traditional of its ogee section base plate reduces 20% ~ 30%, significantly improve force reduction pool bottom, especially the pressure of pond place ogee section base plate is entered, the hydraulic characteristic(s) such as pressure fluctuation meter and flow-shape.Meanwhile, the current underflow speed horizontal proliferation angle dropped in absorption basin is comparatively large, and current horizontal proliferation is comparatively abundant, can increase the adjacent lower collision between flowing that sluices, shear energy dissipating, improve energy dissipation rate.In addition, up-narrow and down-wide vertical contraction section is let out under can carrying out going out water seal stream with more excellent split ratio, comprehensively improves the hydraulic characteristic(s) of current in overflow weir and absorption basin.
Embodiment 2
In the present embodiment, the trapezoidal service condition exporting X-type flaring gate pier of shrinking 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, trapezoidal contraction outlet X-type flaring gate pier vertical contraction section top contraction degree in the present embodiment is smaller, thus longitudinal diffusion degree is slightly weak compared with embodiment 1, but also reduce the lower destruction of stream to dam facing ogee section that sluices, the X-type flaring gate pier that dynamic hydraulic pressure is strong and pulsation root-mean-square value is more traditional of its ogee section base plate reduces 15% ~ 20%.
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, the flow channels be made up of lock hole, top (3), vertically contraction section (4) and lock hole, bottom (5) is formed between two pier bodies, by it is characterized in that the section of described vertical contraction section (4) is the top width b of isosceles trapezoid, 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 CN103981842A (en) | 2014-08-13 |
| CN103981842B true CN103981842B (en) | 2016-02-03 |
Family
ID=51273995
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| 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 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2014
- 2014-05-21 CN CN201410217482.6A patent/CN103981842B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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)
| Title |
|---|
| X、Y型宽尾墩水力特性研究;田振华等;《人民长江》;20091231;第40卷(第24期);第208页第1栏第1段、第209页第2栏2段 * |
| X型宽尾墩体型设计方法探索;梁宗祥等;《西北农林科技大学学报(自然科学版)》;20080531;第36卷(第5期);第207页第1栏第3段-第2栏第2段、第208页第1栏第1段、第209页第2栏2段及图1 * |
| 用于大单宽泄洪台阶坝面上的一种新型宽尾墩;尹进步等;《西北水电》;20021231(第1期);第44-46页 * |
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