CN110593221A - Fold-line type flip bucket at outlet of bank spillway/flood discharge tunnel - Google Patents
Fold-line type flip bucket at outlet of bank spillway/flood discharge tunnel Download PDFInfo
- Publication number
- CN110593221A CN110593221A CN201910837241.4A CN201910837241A CN110593221A CN 110593221 A CN110593221 A CN 110593221A CN 201910837241 A CN201910837241 A CN 201910837241A CN 110593221 A CN110593221 A CN 110593221A
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- section
- water flow
- flow direction
- flip bucket
- spillway
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 68
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 9
- 238000010276 construction Methods 0.000 description 4
- 238000000889 atomisation Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/06—Spillways; Devices for dissipation of energy, e.g. for reducing eddies also for lock or dry-dock gates
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Barrages (AREA)
Abstract
The invention discloses a fold-line type flip bucket at the outlet of a bank spillway/flood discharge hole.A flip bucket main body arranged between an outer side wall and an inner side wall comprises a flat bottom section, a reverse arc section, a gap section along the water flow direction, a flip bucket inclined section along the inclined water flow direction and a flip bucket top section along the vertical water flow direction, wherein the flat bottom section is connected with a discharge chute, the reverse arc section is positioned at the downstream of the flat bottom section, the top end of the inner side wall is terminated on the flat bottom section, and the flat bottom section at the downstream of the top end of the inner side wall and a reverse arc section form a gap section along the water flow direction without a side wall; the top of the deflecting flow nose ridge is provided with a vertical water flow direction deflecting flow nose ridge top section close to the outer side wall, the vertical water flow direction deflecting flow nose ridge top section is connected with the gap section along the water flow direction through an inclined water flow direction deflecting flow nose ridge inclined section, so that water flows to the riverbed from the side direction during small discharge, and the water tongue is pulled out in a longitudinal fan shape during medium and large discharge to enter water along the main riverway. Not only can fully dissipate energy, but also can shorten the length of the bucket, and reduce the damage and influence on the bank slope at the outlet of the downstream spillway or flood discharge tunnel.
Description
Technical Field
The invention relates to the field of flood discharge and energy dissipation in hydraulic and hydroelectric engineering, in particular to a broken-line type flip bucket at an outlet of a bank spillway/flood discharge tunnel.
Background
The water flow discharged from the spillway or the flood discharge tunnel has huge energy, and the high-speed concentrated water flow is connected with the normal water flow of the downstream river channel by full energy dissipation, otherwise, the downstream river bed, the bank slope and the building are seriously scoured and damaged. Trajectory energy dissipation and underflow energy dissipation tanks are generally used. The trajectory energy dissipation has great influence on the safety of a downstream slope and the safety of a building due to flood discharge atomization and pit depth; the energy dissipation of the bottom flow stilling pool causes the height of an excavation slope due to the long length and the large digging depth of the stilling pool, and the construction difficulty and the engineering investment are large.
As shown in fig. 1, in the prior art drift sill at the bank spillway/spillway exit, a drift sill body 20 is constructed on an outer side wall 22 extending along the terrain near the bank/spillway exit and an inner side wall 21 close to the river channel, and the reverse arc section of the drift sill is directly connected with the spillway. The continuous flip bucket has a simple structure, the water flow smoothly falls into the downstream, but in narrow river valleys or other terrain-limited zones, the water tongue can wash the downstream bank slope, so the water jet inflow position needs to be controlled.
Disclosure of Invention
The invention aims to solve the technical problem of providing a fold-line type flip bucket at the outlet of a bank spillway/flood discharge tunnel, which can shorten the length of the bucket and reduce the depth of a downstream pit.
In order to solve the technical problems, the invention adopts the technical scheme that: a fold line type flip bucket at the outlet of a bank spillway/flood discharge hole comprises a flip bucket main body arranged between an outer side wall and an inner side wall, wherein the flip bucket main body comprises a flat bottom section, a reverse arc section, a gap section along the water flow direction, a flip bucket oblique section along the oblique water flow direction and a flip bucket top section along the vertical water flow direction; the top of the deflecting flow nose ridge is provided with a vertical water flow direction deflecting flow nose ridge top section close to the outer side wall, the vertical water flow direction deflecting flow nose ridge top section is connected with the gap section along the water flow direction through an inclined water flow direction deflecting flow nose ridge inclined section, so that water flows to the riverbed from the side direction during small discharge, and the water tongue is pulled out in a longitudinal fan shape during medium and large discharge to enter water along the main riverway.
The length L1 of the notch in the water flow direction is 1/2-1/3 of the length B of the inner flip bucket.
And an included angle alpha between the inclined section of the flip bucket in the inclined water flow direction and the axial line of the spillway/flood discharge tunnel is 45-75 degrees.
The length L2 of the top section of the flip bucket in the vertical water flow direction is 1/6-1/7 of the width of the flip bucket.
The invention has the beneficial effects that: the invention can not only fully dissipate energy, but also shorten the length of the bucket, and solve the problem that the flip flow water tongue is in the same direction with the main trough and the downstream river channel under the terrain condition. The damage and the influence on the downstream spillway or the outlet bank slope of the flood discharge tunnel are reduced, and the construction difficulty and the engineering quantity are reduced.
Drawings
Fig. 1 is a three-dimensional structure diagram of a flip bucket at the outlet of a bank spillway/spillway tunnel in the prior art.
Fig. 2 is a three-dimensional structure diagram of a broken-line flip bucket at the outlet of a bank spillway/spillway tunnel according to the invention.
Fig. 3 is a plan view of the fold-line flip bucket at the outlet of the bank spillway/spillway tunnel according to the present invention.
Detailed Description
The invention is explained in more detail below with reference to specific embodiments and the attached drawing:
as shown in fig. 2 and 3, the zigzag flip bucket for the outlet of the bank spillway/flood discharge hole of the invention, the flip bucket body arranged between the outer side wall 2 and the inner side wall 1 comprises a flat bottom section 3, a reverse arc section 4, a gap section 6 along the water flow direction, a flip bucket inclined section 7 along the oblique water flow direction and a flip bucket top section 8 along the vertical water flow direction, the flat bottom section 3 is connected with a discharge chute 10, the reverse arc section 4 is positioned at the downstream of the flat bottom section 3, the top end of the inner side wall 1 is terminated on the flat bottom section 3, and the flat bottom section 3 at the downstream of the top end of the inner side wall 1 is added with the reverse arc section 4 to form a gap section 6 along the water flow direction without a side wall; close to the outer side wall 2, a section of vertical water flow direction deflecting flow bucket top section 8 is reserved at the top of the deflecting flow bucket, the vertical water flow direction deflecting flow bucket top section 8 is connected with the downstream direction gap section 6 through an inclined water flow direction deflecting flow bucket inclined section 7, so that water flows to a river bed from the side direction during small discharge, and a water tongue is longitudinally pulled out in a fan shape during medium and large discharge to enter water along a main river channel.
The length L1 of the gap section 6 along the water flow direction is 1/2-1/3 of the length B of the inner flip bucket.
The inclined section 7 of the flip bucket in the inclined water flow direction and the axis 9 of the spillway/flood discharge tunnel form an included angle alpha of 45-75 degrees.
The length L2 of the top section 8 of the flip bucket in the vertical water flow direction is 1/6-1/7 of the width of the flip bucket.
The invention arranges the broken-line flip bucket at the outlet of the bank spillway or the flood discharge tunnel, so that the problem that the water flow cannot be lifted to form a water jump at the bucket section when the discharge amount is small can be solved, the bucket is abraded by carrying broken stones in the downward discharge water flow, and the falling water flow after the jump easily causes the brushing of the bucket foundation, thereby possibly harming the safety of the outlet of the spillway or the flood discharge tunnel. When the water is discharged in a large amount, the water tongue is longitudinally pulled open in a fan shape and smoothly enters the main river channel, so that the scouring of the downstream bank slope is reduced, the pit flushing depth is reduced, and the flood discharge atomization is reduced. The invention can not only fully dissipate energy, but also shorten the length of the bucket, and solve the problem that the flip flow water tongue is in the same direction with the main trough and the downstream river channel under the terrain condition. The damage and the influence on the downstream spillway or the outlet slope of the flood discharge tunnel are reduced, and the construction difficulty and the engineering quantity are reduced.
In a small reservoir hub project, a dam is a homogeneous earth dam, and the maximum dam height is 39 m. The open type single-hole spillway is adopted for flood discharge, the water head on a weir is 3.4m, and the flood discharge quantity is checked to be201m3(s) design flood discharge rate of 91m3And s. Influenced by topography, the length of the arrangement of the energy dissipation section at the outlet is limited, the slope is high and steep, if underflow energy dissipation is adopted, a downstream riverbed is protected, a longer stilling basin needs to be arranged, and the earth and stone excavation amount and the concrete volume are larger. The jet flow energy dissipation is adopted, the position, the range and the flow distribution of the jet flow falling into a downstream riverbed are effectively controlled, the structure is simple, the construction and the maintenance are convenient, the work amount is small, but the downstream erosion is serious, and the atomization is large.
Therefore, the broken-line flip bucket provided by the invention is used for cutting the flip bucket along the water flow direction, the oblique water flow direction and the vertical water flow direction, so that water flows to a river bed from the side direction in small discharge, and a water tongue is longitudinally pulled open in a fan shape in medium and large discharge to enter water along a main river channel. The main river channel is reduced in the depth of the pit, and the bank slope is prevented from being washed by water flow in a large flow.
The above-mentioned embodiments are only for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to carry out the same, and the present invention shall not be limited to the embodiments, i.e. the equivalent changes or modifications made within the spirit of the present invention shall fall within the scope of the present invention.
Claims (4)
1. A fold line type flip bucket of a bank spillway/flood discharge hole outlet is characterized in that a flip bucket main body arranged between an outer side wall (2) and an inner side wall (1) comprises a flat bottom section (3), a reverse arc section (4), a gap section (6) along the water flow direction, a flip bucket inclined section (7) along the oblique water flow direction and a flip bucket top section (8) along the vertical water flow direction, the flat bottom section (3) is connected with a discharge groove (10), the reverse arc section (4) is positioned at the downstream of the flat bottom section (3), the top end of the inner side wall (1) is terminated on the flat bottom section (3), and the flat bottom section (3) at the downstream of the top end of the inner side wall (1) is added with the reverse arc section (4) to form a gap section (6) without a side wall along the water flow direction; close to outside boundary wall (2), leave one section perpendicular rivers direction at the top of the flip bucket and flip the bucket top segment (8), the perpendicular rivers direction flip bucket top segment (8) with along the connection of oblique rivers direction flip bucket oblique section (7) between rivers direction breach section (6), rivers flow to the riverbed from the side direction during messenger's little discharge, the vertical fan-shaped pulling open of water tongue during medium, big discharge is gone into water along main river course.
2. The fold-line flip bucket for the bank spillway/spillway exit according to claim 1, wherein the length L1 of the cut-out section (6) along the water flow direction is 1/2-1/3 of the length B of the inner flip bucket.
3. The bank spillway/spillway tunnel outlet fold-line flip bucket according to claim 1, wherein an angle α between an inclined section (7) of the flip bucket with the inclined water flow direction and an axis (9) of the spillway/spillway tunnel is 45-75 °.
4. The fold-line flip bucket for the bank spillway/spillway exit according to claim 1, wherein the length L2 of the top section (8) of the flip bucket in the vertical water flow direction is 1/6-1/7 of the width of the flip bucket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910837241.4A CN110593221A (en) | 2019-09-05 | 2019-09-05 | Fold-line type flip bucket at outlet of bank spillway/flood discharge tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910837241.4A CN110593221A (en) | 2019-09-05 | 2019-09-05 | Fold-line type flip bucket at outlet of bank spillway/flood discharge tunnel |
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| Publication Number | Publication Date |
|---|---|
| CN110593221A true CN110593221A (en) | 2019-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910837241.4A Pending CN110593221A (en) | 2019-09-05 | 2019-09-05 | Fold-line type flip bucket at outlet of bank spillway/flood discharge tunnel |
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| CN (1) | CN110593221A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111893963A (en) * | 2020-06-23 | 2020-11-06 | 中国电建集团贵阳勘测设计研究院有限公司 | Low limit wall pastes triangle body contraction type flip bucket |
| CN113605306A (en) * | 2021-08-24 | 2021-11-05 | 大连理工大学 | Energy dissipation facility combining unilateral diffusion and oblique flip bucket |
| CN114837143A (en) * | 2022-06-09 | 2022-08-02 | 中国电建集团中南勘测设计研究院有限公司 | Flip bucket and drainage structure thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1759998A1 (en) * | 1990-06-04 | 1992-09-07 | Грузинский научно-исследовательский институт энергетики и гидротехнических сооружений | Spillway |
| CN101736718A (en) * | 2009-12-17 | 2010-06-16 | 四川大学 | Reversely bevelled flip bucket |
| CN103266584A (en) * | 2013-06-05 | 2013-08-28 | 中国水利水电第七工程局有限公司 | Novel water conservancy project energy dissipater structure |
| CN106498909A (en) * | 2016-10-08 | 2017-03-15 | 四川大学 | For spillway on bank or the defrlector bucket of flood discharge hole outlet |
| CN107513985A (en) * | 2017-08-10 | 2017-12-26 | 四川大学 | A kind of afterbody abutment wall recession formula defrlector bucket |
| CN211256912U (en) * | 2019-09-05 | 2020-08-14 | 中国电建集团北京勘测设计研究院有限公司 | Fold-line type flip bucket at outlet of bank spillway/flood discharge tunnel |
-
2019
- 2019-09-05 CN CN201910837241.4A patent/CN110593221A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1759998A1 (en) * | 1990-06-04 | 1992-09-07 | Грузинский научно-исследовательский институт энергетики и гидротехнических сооружений | Spillway |
| CN101736718A (en) * | 2009-12-17 | 2010-06-16 | 四川大学 | Reversely bevelled flip bucket |
| CN103266584A (en) * | 2013-06-05 | 2013-08-28 | 中国水利水电第七工程局有限公司 | Novel water conservancy project energy dissipater structure |
| CN106498909A (en) * | 2016-10-08 | 2017-03-15 | 四川大学 | For spillway on bank or the defrlector bucket of flood discharge hole outlet |
| CN107513985A (en) * | 2017-08-10 | 2017-12-26 | 四川大学 | A kind of afterbody abutment wall recession formula defrlector bucket |
| CN211256912U (en) * | 2019-09-05 | 2020-08-14 | 中国电建集团北京勘测设计研究院有限公司 | Fold-line type flip bucket at outlet of bank spillway/flood discharge tunnel |
Non-Patent Citations (1)
| Title |
|---|
| 林继镛等: "《水工建筑物》", vol. 6, 北京：中国水利水电出版社, pages: 315 - 105 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111893963A (en) * | 2020-06-23 | 2020-11-06 | 中国电建集团贵阳勘测设计研究院有限公司 | Low limit wall pastes triangle body contraction type flip bucket |
| CN113605306A (en) * | 2021-08-24 | 2021-11-05 | 大连理工大学 | Energy dissipation facility combining unilateral diffusion and oblique flip bucket |
| CN114837143A (en) * | 2022-06-09 | 2022-08-02 | 中国电建集团中南勘测设计研究院有限公司 | Flip bucket and drainage structure thereof |
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