CN111101491A - Asymmetric steering contraction differential flip bucket body type - Google Patents
Asymmetric steering contraction differential flip bucket body type Download PDFInfo
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- CN111101491A CN111101491A CN202010064194.7A CN202010064194A CN111101491A CN 111101491 A CN111101491 A CN 111101491A CN 202010064194 A CN202010064194 A CN 202010064194A CN 111101491 A CN111101491 A CN 111101491A
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- 230000008602 contraction Effects 0.000 title abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 210000000476 body water Anatomy 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 230000000977 initiatory effect Effects 0.000 claims 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 abstract description 20
- 230000000694 effects Effects 0.000 abstract description 9
- 230000003628 erosive effect Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000009991 scouring Methods 0.000 description 3
- 238000005273 aeration Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000037237 body shape Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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- 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)
- Revetment (AREA)
Abstract
The invention relates to the field of water conservancy and hydropower engineering water drainage energy dissipation, and discloses an asymmetric steering contraction differential flip bucket body, which comprises a flip bucket section main body, wherein the flip bucket section main body comprises a flip bucket foundation, a side flip bucket wall at the side close to a mountain and a side flip bucket wall at the side close to a riverbed, the side flip bucket wall at the side close to the mountain is steered towards the central axis close to the water flow direction of the flip bucket section main body along the water flow direction, the side flip bucket wall at the side close to the riverbed is steered towards the central axis far away from the main flip bucket section main body along the water flow direction, a first high bucket, a first low bucket, a second high bucket and a second low bucket are sequentially arranged between the side flip bucket wall at the side close to the mountain and the side flip bucket wall at the side close to the riverbed on the flip bucket foundation, and the first high bucket and the first low bucket are contracted and. The asymmetric steering contraction differential flip bucket body has a good energy dissipation effect, can effectively control the falling position and range of jet flow, and can well achieve the purposes of protecting bank slopes and reducing the erosion to river channels.
Description
Technical Field
The invention relates to the field of water conservancy and hydropower engineering water drainage energy dissipation, in particular to an asymmetric steering contraction differential flip bucket body type.
Background
In a hydraulic and hydroelectric engineering hub, a water discharge building must be arranged for discharging flood which cannot be contained in reservoir capacity, preventing the flood from overflowing over the top of a dam and ensuring the safety of the dam.
For an earth-rock dam, overflow or a large amount of overflow from the dam body is generally not allowed, or when the river valley is narrow and the discharge amount is large, and when all flood is difficult to discharge through the concrete dam, a shoreside spillway or a drainage tunnel needs to be built at the shoreside or the natural bealock position.
As a common drainage structure, the spillway should have sufficient drainage capacity and ensure its safety and proper connection between the drainage flow and the river flow.
With the rapid development of dam construction, the flood discharge energy dissipation technology has a lot of new progresses, wherein the trajectory energy dissipation development is rapid, and the trajectory energy dissipation technology becomes a main energy dissipation measure of medium-high water head and large single wide flow discharge buildings. In recent years, new energy dissipaters are continuously appeared, and the current shoreside type water release structure trajectory jet energy dissipater mainly comprises: continuous threshold, differential threshold, oblique flip threshold, twisted threshold, etc. Because the downward discharge water flow often has the characteristics of high water head, large flow velocity and concentrated water strands, the energy is large, if the downward discharge water flow is not properly treated, the downstream river bed and the bank slope can be seriously washed, even the bank slope collapses, and the stability and the safety of a dam, a discharge building and the like are further endangered. Therefore, the key of the drainage building adopting the trajectory energy dissipation mode is to select a proper flip bucket body type, eliminate partial energy of jet flow as much as possible in the air and effectively control the position, range and flow distribution of the jet flow falling into a downstream riverbed. In the construction of hydraulic and hydroelectric engineering, conditions such as different engineering hub arrangement, topographic and geological conditions, water release structure arrangement, hydrology and application are varied, so that the application range and the effect of the flip bucket body type have certain limitations, and ideal requirements and energy dissipation effects cannot be achieved sometimes. If limited by hub arrangement and topographic and geological conditions, due to the reasons of large single-width discharge capacity, difficult arrangement of the outlet of a bank-type water release structure, narrow downstream river channel and the like, the axis of the outlet of the water release structure can only intersect with a downstream bank slope at a small angle, but under the condition that the downstream bank slope and the riverbed have poor anti-scouring capacity, the existing trajectory energy dissipater type cannot achieve the ideal effect, so that the system cannot sufficiently dissipate energy in the air, cannot effectively control the position and range of jet flow falling into the downstream riverbed, cannot well protect the downstream bank slope close to a mountain side and reduce scouring on the riverbed.
Disclosure of Invention
The invention aims to provide an asymmetric steering contraction differential flip bucket body type aiming at the defects of the technology, which has better energy dissipation effect, can effectively control the falling position and range of jet flow, and can better achieve the aims of protecting bank slopes and reducing the erosion to river channels.
In order to achieve the purpose, the asymmetric steering contraction differential flip bucket body comprises a flip bucket section main body, wherein the starting end of the flip bucket section main body is connected with the tail end of an upstream chute, the flip bucket section main body comprises a flip bucket foundation, a backer side flip bucket side wall and a riverbed side flip bucket side wall, the backer side flip bucket side wall and the riverbed side flip bucket side wall are located on the flip bucket foundation, the flip bucket foundation is made of concrete with a lower mark number and maintains the stability of a flip flow energy dissipation section, the backer side flip bucket side wall turns towards the central axis close to the water flow direction of the flip bucket section main body along the water flow direction, the riverbed side flip bucket side wall turns towards the central axis far away from the water flow direction of the flip bucket section main body along the water flow direction, the turning angle of the backer side flip bucket side wall is larger than that of the backer side flip bucket side wall, and the flip bucket foundation is located between the backer side flip bucket side wall and the riverbed side flip bucket side wall, a first, First low bank, the low bank of second high bank and second, just first high bank and first low bank are located flip bucket section main part rivers direction axis lean on the mountain side, the low bank of second high bank and second is located flip bucket section main part rivers direction axis lean on the riverbed side, first high bank and first low bank are followed rivers direction and are turned to riverbed direction shrink, lean on mountain side flip bucket boundary wall, lean on riverbed side flip bucket boundary wall, first high bank, first low bank, the low bank of second high bank and second and pass through flip bucket basis supports.
Preferably, the second high bank contracts along the water flow direction, so that the jet flow of the second high bank and the jet flow of the first low bank are fully mixed in the air for collision energy dissipation, and the second low bank diffuses and turns to the river bed direction along the water flow direction, so that the reduction amplitude of the total width of the outlet bank is smaller, and the single width flow of the outlet water is not excessively increased.
Preferably, the steering angle of the first high bank on the hill side is greater than the steering angle of the first high bank on the river bed side, and the steering angle of the first low bank on the hill side is greater than the steering angle of the first low bank on the river bed side.
Preferably, the turning angles of the first high sill and the first low sill decrease in sequence along the water flow direction.
Preferably, the turning angle of the flip threshold side wall close to the hill is the same as the turning angle of the flip threshold side wall close to the hill of the first high bank, and the turning angle of the flip threshold side wall close to the riverbed side is the same as the turning angle of the flip threshold side wall close to the riverbed side of the second low bank.
Preferably, the thickness of the side wall of the flip bucket close to the mountain side is kept constant, and the thickness of the side wall of the flip bucket close to the river bed is kept constant.
Preferably, the turning angle of the flip bucket side wall close to the mountain side is smaller than 8 degrees, the reduced outflow width of the outlet end of the flip bucket section main body is not more than 10 percent, and the small increase amplitude of the single width flow is ensured.
Preferably, the side wall of the flip bucket close to the mountain side, the side wall of the flip bucket close to the riverbed side, the first high bank, the first low bank, the second high bank and the second low bank are all of reinforced concrete structures.
Preferably, the distance between the side wall of the flip bucket close to the mountain and the side wall of the flip bucket close to the river bed gradually decreases from upstream to downstream, so that the outlet width of the flip bucket is slightly smaller than the inlet width.
Preferably, the second high sill is contracted and turned towards the direction of the river bed along the water flow direction, and the second low sill is contracted and turned towards the direction of the river bed along the water flow direction.
Compared with the prior art, the invention has the following advantages:
1. the jet flow is asymmetrically turned and contracted along the flow path, so that certain turning occurs after the jet flow is lifted away from the bucket, aeration, diffusion and mutual mixing and collision of water particles in the air are enhanced, partial energy of the jet flow can be well reduced in the air, the position and the range of the jet flow falling into a downstream riverbed can be effectively controlled, the purposes of protecting a downstream bank slope close to a mountain side and reducing the erosion of a river channel are achieved, and meanwhile, the jet flow plays a good role in stabilizing and safety of the jet flow and adjacent buildings;
2. the flip bucket body is simple, breaks through the conventional oblique flip bucket (or twisted bucket) and differential flip bucket body, integrates the advantages of the flip buckets, can better adapt to the unfavorable conditions possibly encountered when the shoreside type water outlet building adopts the trajectory energy dissipation, has better energy dissipation effect, can effectively control the water falling position and range of jet flow, can better achieve the purposes of protecting a bank slope and lightening the erosion of a river channel, correspondingly reduces the engineering quantity of protecting a downstream riverbed and the bank slope, and saves the investment;
3. the method has the characteristics of good adaptability, high efficiency, safety, economy and the like, and promotes the development of the trajectory energy dissipation technology of the water release structure to a certain extent.
Drawings
FIG. 1 is a schematic plan view of an asymmetric steering, contracting and differential flip-flop of the present invention;
FIG. 2 is a schematic view of an asymmetric steering contracting differential flip-bucket body according to the present invention;
FIG. 3 is a cross-sectional view taken along line A-A in FIG. 1 (longitudinal cross-section taken in the direction of water flow);
fig. 4 is a cross-sectional view taken along line B-B of fig. 1 (cross-section taken along the kam threshold).
The components in the figures are numbered as follows:
the flip bucket comprises a flip bucket foundation 1, a backer side flip bucket side wall 2, a riverbed side flip bucket side wall 3, a first high bucket 4, a first low bucket 5, a second high bucket 6 and a second low bucket 7.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
As shown in fig. 1, 2, 3 and 4, the asymmetric turning contracting differential flip bucket body of the invention comprises a flip bucket section main body, the starting end of the flip bucket section main body is connected with the tail end of the upstream chute, the flip bucket section main body comprises a flip bucket foundation 1, a side flip bucket side wall 2 close to the side flip bucket side wall 2 and a side flip bucket side wall 3 close to the side flip bucket side wall 1, the side flip bucket side wall 2 close to the side flip bucket section main body is turned towards the central axis of the main body in the water flow direction, the side flip bucket side wall 3 close to the side flip bucket side wall is turned towards the central axis far away from the side flip bucket section main body in the water flow direction, the turning angle of the side flip bucket side wall 2 close to the side flip bucket side wall 2 is larger than that of the side flip bucket side wall 3 close to the side flip bucket side wall, a first high sill 4, a first low sill 5, a second high sill 6 and a second low sill 7 are arranged between the side flip bucket side wall 2 close to the side flip bucket side wall 3 of the side flip bucket side wall 1 close to the side flip bucket side wall, and, the second high bank 6 and the second low bank 7 are located on the side close to the riverbed of the central axis of the flip bucket section main body in the water flow direction, and the first high bank 4 and the first low bank 5 shrink and turn in the direction of the riverbed along the water flow direction.
In addition, the second high sill 6 contracts along the water flow direction, the second low sill 7 diffuses and turns along the water flow direction to the riverbed direction, the turning angle of the first high sill 4 close to the side of the mountain is larger than the turning angle of the first high sill 4 close to the riverbed side, the turning angle of the first low sill 5 close to the side of the mountain is larger than the turning angle of the first low sill close to the riverbed side, and the turning angles of the first high sill 4 and the first low sill 5 are sequentially reduced progressively along the water flow direction.
In this embodiment, the turning angle of the backer side flip edge wall 2 is the same as the turning angle of the first high bank 4 on the top side, the turning angle of the riverbed side flip edge wall 3 is the same as the turning angle of the second low bank 7 on the riverbed side, the thickness of the backer side flip edge wall 2 is kept constant, the thickness of the riverbed side flip edge wall 3 is kept constant, the distance between the backer side flip edge wall 2 and the riverbed side flip edge wall 3 is gradually reduced from the upstream to the downstream, the turning angle of the backer side flip edge wall 2 is smaller than 8%, and the reduced outflow width of the flip segment main body outlet end is not more than 10%.
In this embodiment, the hill-side flip bucket side wall 2, the riverbed-side flip bucket side wall 3, the first high sill 4, the first low sill 5, the second high sill 6, and the second low sill 7 are all of a reinforced concrete structure.
In other embodiments, the second high sill 6 can be contracted and turned towards the riverbed direction along the water flow direction, and the second low sill 7 is contracted and turned towards the riverbed direction along the water flow direction.
When the embodiment is used, a person skilled in the art can change, adjust and optimize the flip body according to the practical engineering situation without departing from the principle and design concept of the invention. The clear width of the initial section of the flip bucket section, the arrangement and the number of the high bucket and the low bucket and the arrangement on the left side and the right side of the axis are determined according to the specific conditions of the engineering.
In addition, the differential flip bucket steering angle, the maximum steering angle of the side wall 2 of the flip bucket on the backer side should not exceed 8 degrees, the turning angles of the flip bucket on the backer side towards the central axis direction of the main body water flow direction of the flip bucket section should be gradually decreased, the axis towards the direction of the riverbed, whether the flip bucket is turned, contracted or diffused or not should be determined according to the actual conditions of engineering, the energy dissipation effect is ensured, and the jet flow is effectively controlled to fall into the ideal position and range of the downstream riverbed. Meanwhile, the differential flip bucket is totally contracted in a steering mode, the contraction width is not too large, the reduced outflow width is not more than 10%, and the small increase amplitude of the single width flow is ensured. When the asymmetric steering shrinkage differential flip bucket is adopted for flip flow energy dissipation of a water release structure in actual engineering, the arrangement and the body shape of the flip bucket are reasonably determined by combining a hydraulic model test, so that an ideal effect is achieved.
The asymmetric turning and contracting differential flip bucket body type is asymmetrically turned and contracted along a flow path, so that a certain turning is generated after jet flow is lifted away from a flip bucket, aeration, diffusion and mutual mixing and collision of water particles in the air are enhanced, partial energy of the jet flow can be reduced in the air better, the position and the range of the jet flow falling into a downstream riverbed can be effectively controlled, the purposes of protecting a downstream bank slope close to a mountain side and reducing the scouring of the river channel are achieved, and meanwhile, the asymmetric turning and contracting differential flip bucket body type can play a better role in stabilizing and safety of the flip bucket body and adjacent buildings; in addition, the flip bucket body is simple, breaks through the conventional inclined flip bucket (or twisted bucket) and differential flip bucket body, integrates the advantages of the flip buckets, can better adapt to the unfavorable conditions possibly encountered when the shoreside type water outlet building adopts the trajectory energy dissipation, has better energy dissipation effect, can effectively control the water falling position and range of jet flow, can better achieve the purposes of protecting the bank slope and lightening the erosion of the river channel, correspondingly reduces the engineering amount of protecting the downstream riverbed and the bank slope, and saves the investment; the invention has the characteristics of good adaptability, high efficiency, safety, economy and the like, and promotes the development of the trajectory jet energy dissipation technology of the water release structure to a certain extent.
Claims (10)
1. The utility model provides an asymmetric differential flip bucket size that turns to of shrink, includes flip bucket section main part, the initiating terminal and the upper reaches of flip bucket section main part let out the groove end and link up its characterized in that: the flip bucket section main body comprises a flip bucket foundation (1), and a flip bucket side wall (2) and a flip bucket side wall (3) which are positioned on the flip bucket foundation (1), the flip bucket side wall (2) is close to the central axis of the flip bucket section main body water flow direction along the water flow direction, the flip bucket side wall (3) is far away from the central axis of the flip bucket section main body water flow direction along the water flow direction, the steering angle of the flip bucket side wall (2) is larger than that of the flip bucket side wall (3), the flip bucket foundation (1) is positioned between the flip bucket side wall (2) and the flip bucket side wall (3) and is sequentially provided with a first high bucket (4), a first low bucket (5), a second high bucket (6) and a second low bucket (7), and the first high bucket (4) and the first low bucket (5) are positioned on the flip bucket side of the flip bucket side wall, the flip bucket side wall (3) is positioned on the flip bucket side of the flip bucket side, and is positioned on the flip bucket side of, the second high sill (6) and the second low sill (7) are located on the side, close to the riverbed, of the central axis of the flip bucket section main body in the water flow direction, and the first high sill (4) and the first low sill (5) shrink and turn in the direction of the riverbed along the water flow direction.
2. The asymmetric steering, retracting and differential flip-flop of claim 1, wherein: the second high threshold (6) shrinks along the water flow direction, and the second low threshold (7) diffuses and turns to the riverbed direction along the water flow direction.
3. The asymmetric steering, retracting and differential flip-flop of claim 2, wherein: the steering angle of the first high sill (4) close to the mountain side is larger than that of the first high sill (4) close to the river bed side, and the steering angle of the first low sill (5) close to the mountain side is larger than that of the first low sill (5) close to the river bed side.
4. The asymmetric steering, retracting and differential flip-flop of claim 3, wherein: the steering angles of the first high threshold (4) and the first low threshold (5) are sequentially decreased progressively along the water flow direction.
5. The asymmetric steering, retracting and differential flip-flop of claim 4, wherein: the turning angle of the flip bucket side wall (2) close to the mountain is the same as that of the first high bank (4) close to the mountain, and the turning angle of the flip bucket side wall (3) close to the riverbed is the same as that of the second low bank (7) close to the riverbed.
6. The asymmetric steering, retracting and differential flip-flop of claim 5, wherein: the thickness of the flip bucket side wall (2) close to the mountain side is kept unchanged, and the thickness of the flip bucket side wall (3) close to the riverbed side is kept unchanged.
7. The asymmetric steering, retracting and differential flip-flop of claim 6, wherein: the turning angle of the side wall (2) of the flip bucket close to the mountain side is smaller than 8 degrees, and the reduced outflow width of the outlet end of the main body of the flip bucket section is not more than 10 percent.
8. The asymmetric steering, retracting and differential flip-flop of claim 7, wherein: the side wall (2) of the flip bucket close to the mountain side, the side wall (3) of the flip bucket close to the riverbed side, the first high bank (4), the first low bank (5), the second high bank (6) and the second low bank (7) are all of reinforced concrete structures.
9. The asymmetric steering, retracting and differential flip-flop of claim 8, wherein: the distance between the side flip bucket side wall (2) close to the mountain and the side flip bucket side wall (3) close to the river bed is gradually reduced from the upstream to the downstream.
10. The asymmetric steering, retracting and differential flip-flop of claim 1, wherein: the second high sill (6) shrinks and turns to the direction of the riverbed along the water flow direction, and the second low sill (7) shrinks and turns to the direction of the riverbed along the water flow direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010064194.7A CN111101491A (en) | 2020-01-20 | 2020-01-20 | Asymmetric steering contraction differential flip bucket body type |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010064194.7A CN111101491A (en) | 2020-01-20 | 2020-01-20 | Asymmetric steering contraction differential flip bucket body type |
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| CN111101491A true CN111101491A (en) | 2020-05-05 |
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| CN202010064194.7A Pending CN111101491A (en) | 2020-01-20 | 2020-01-20 | Asymmetric steering contraction differential flip bucket body type |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111945682A (en) * | 2020-09-14 | 2020-11-17 | 大连理工大学 | Energy dissipation pool with inverted triangular wedge tail pier |
| 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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203514275U (en) * | 2013-10-17 | 2014-04-02 | 中国水电顾问集团北京勘测设计研究院有限公司 | Narrow-slit flip bucket structure of release structure in high and steep narrow valley |
| CN212335944U (en) * | 2020-01-20 | 2021-01-12 | 长江勘测规划设计研究有限责任公司 | Asymmetric steering contraction differential flip bucket body type |
-
2020
- 2020-01-20 CN CN202010064194.7A patent/CN111101491A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203514275U (en) * | 2013-10-17 | 2014-04-02 | 中国水电顾问集团北京勘测设计研究院有限公司 | Narrow-slit flip bucket structure of release structure in high and steep narrow valley |
| CN212335944U (en) * | 2020-01-20 | 2021-01-12 | 长江勘测规划设计研究有限责任公司 | Asymmetric steering contraction differential flip bucket body type |
Non-Patent Citations (1)
| Title |
|---|
| 李元杰等: "一种新型非对称转向收缩差动式挑坎设计", 水利规划与设计, no. 2019, 31 December 2019 (2019-12-31), pages 144 - 147 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111945682A (en) * | 2020-09-14 | 2020-11-17 | 大连理工大学 | Energy dissipation pool with inverted triangular wedge tail pier |
| 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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