CN118187005A - Continuous diffusion type flow-picking energy dissipation structure - Google Patents
Continuous diffusion type flow-picking energy dissipation structure Download PDFInfo
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- CN118187005A CN118187005A CN202410336270.3A CN202410336270A CN118187005A CN 118187005 A CN118187005 A CN 118187005A CN 202410336270 A CN202410336270 A CN 202410336270A CN 118187005 A CN118187005 A CN 118187005A
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- 238000009792 diffusion process Methods 0.000 title claims abstract description 62
- 230000021715 photosynthesis, light harvesting Effects 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 4
- 210000002105 tongue Anatomy 0.000 description 11
- 230000000694 effects Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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Abstract
The application relates to a continuous diffusion type flip bucket energy dissipation structure, which comprises a chute, a side wall and a continuous diffusion type flip bucket, wherein the chute is provided with a slope section and a reverse arc section which are sequentially arranged along a first direction, the slope section is tangential to the reverse arc section, and the first direction is the extending direction from the upstream to the downstream of the chute; the side walls are positioned at two sides of the chute and are arranged along the first direction, and the side walls have preset heights; the continuous diffusion flip bucket is provided with an inverted cambered surface, the flip angles of the inverted cambered surface are symmetrically distributed along the central line of the width direction of the chute, the flip angles are uniformly changed, the minimum flip angle of the inverted cambered surface is defined as theta 1, the maximum flip angle of the inverted cambered surface is defined as theta 2, and then: theta 1≤10°,25°≤θ2 is more than or equal to 0 DEG and less than or equal to 35 DEG; the continuous diffusion flip bucket comprises a central flip bucket and side flip buckets, wherein the central flip bucket is positioned at the middle position, and the side flip buckets are positioned at two sides close to the side wall; the continuous diffusion type diversion energy dissipation structure can reduce the impact of water flow on the bottom of a river bed.
Description
Technical Field
The application relates to the technical field of flood discharge energy dissipation engineering, in particular to a continuous diffusion type diversion energy dissipation structure.
Background
The diversion energy dissipation is a common energy dissipation mode, but water flow for diversion energy dissipation is relatively concentrated in the air, the air energy dissipation rate is low, the energy dissipation is mainly concentrated in the riverbed and is finished, the energy is concentrated, the impact on the bottom of the downstream riverbed is large, and pit punching excavation is needed in advance or a plunge pool is needed to be built downstream.
Disclosure of Invention
The embodiment of the application provides a continuous diffusion type diversion energy dissipation structure, which can improve the energy consumption of water flow in the air, and prolong the longitudinal length of a water tongue entering a river water cushion, so that the impact of the water flow on the bottom of a river bed is reduced.
The continuous diffusion type diversion energy dissipation structure provided by the embodiment of the application comprises the following components:
The chute is provided with a slope section and an anti-arc section, the slope section and the anti-arc section are sequentially arranged along a first direction, the slope section is tangential to the anti-arc section, and the first direction is the extending direction from the upstream to the downstream of the chute;
the side walls are positioned at two sides of the chute and are arranged along the first direction, and the side walls have preset heights;
The continuous diffusion type flip bucket comprises an inverted cambered surface, the flip angles of the inverted cambered surface are symmetrically distributed along the central line of the width direction of the chute, the flip angles are uniformly changed, the minimum flip angle of the inverted cambered surface is defined as theta 1, the maximum flip angle of the inverted cambered surface is defined as theta 2, and then: theta 1≤10°,25°≤θ2 degrees is more than or equal to 0 degrees and less than or equal to 35 degrees.
In addition, the continuous diffusion type diversion energy dissipation structure provided by the embodiment of the application can also have the following additional technical characteristics:
In an alternative scheme, the continuous diffusion flip bucket comprises a central flip bucket and side flip buckets, wherein the central flip bucket is positioned in the middle of the continuous diffusion flip bucket, and the side flip buckets are positioned on two sides of the continuous diffusion flip bucket, which are close to the side wall;
if the width of the center flip bucket is defined as a, the width of the side flip bucket is defined as B, and the width of the chute is defined as B, then: a is more than or equal to 1.5b and less than or equal to 2.0b, and the width of the center flip bucket is not less than 2m; b is more than or equal to 1/10B and less than or equal to 1/5B, and the width of the side flip bucket is not less than 1m.
In an optional scheme, if the radius of the reverse arc surface of the continuous diffusion flip bucket is defined as R, and the depth of water at the lowest point of the reverse arc is h when the flood gate is fully opened, then: r is more than or equal to 6h and less than or equal to 12h.
In an alternative scheme, the reverse arc surface of the continuous diffusion flip bucket is tangent to the reverse arc section of the chute.
In an alternative, if the inverted cambered top elevation at the minimum flip angle is defined as H, then H is higher than the highest water level downstream of the continuous diffusion flip bucket.
In an alternative scheme, along the first direction, the central flip bucket protrudes outwards from the side flip bucket, the maximum flip angle of the reverse cambered surface is located at the middle position of the continuous diffusion flip bucket, and the minimum flip angle of the reverse cambered surface is located at two sides of the continuous diffusion flip bucket.
In an alternative, the chute has a beam narrow section starting at the lowest of the reverse arc sections, and the width of the beam narrow section tapers in the first direction; along the first direction, the central flip bucket is concave in the side flip bucket, the minimum flip angle of the reverse cambered surface is positioned in the middle of the continuous diffusion flip bucket, and the maximum flip angle of the reverse cambered surface is positioned on two sides of the continuous diffusion flip bucket.
In an alternative scheme, the turning radius of the side wall of the beam narrow section is defined as r, the beam narrow angle of the side wall of the beam narrow section is alpha, and then 2B is less than or equal to r and less than or equal to 5B, and alpha is not more than 5 degrees.
The embodiment of the application has the beneficial effects that:
According to the continuous diffusion type diversion energy dissipation structure, the diversion angle is continuously changed, the whole water flow is stretched in the vertical face and along the direction of the river bed, so that the water flow is diffused in the air, the energy dissipation effect of air resistance is increased, meanwhile, the water tongue is longitudinally stretched and then rushed into the water cushion of the downstream river bed, and energy is further dispersed, so that the energy and the energy distribution density of the water tongue when the water tongue enters the river bed are reduced, the energy dissipation effect is effectively improved, the impact of the water tongue on the river bed is reduced, and the scouring damage is reduced. In addition, the change of the picking angle can be achieved through the uniform change of the longitudinal extension length of the anti-arc section, the anti-arc radius of the whole picking area is kept consistent, and the continuous change of the picking angle does not cause the increase of the difficulty of construction technology.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
FIG. 1 is a schematic diagram of a continuous diffusion type flip energy dissipation structure according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of the structure at A-A of FIG. 1;
FIG. 3 is a schematic view of a continuous diffusion type flip energy dissipating structure according to another embodiment of the present application;
fig. 4 is a schematic cross-sectional view at B-B of fig. 3.
Reference numerals: chute 1, slope section 11, anti-arc section 12, beam narrow section 13, side wall 2, continuous diffusion flip bucket 3, center flip bucket 31, side flip bucket 32.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
Detailed Description
For a better understanding of the technical solution of the present application, the following detailed description of the embodiments of the present application refers to the accompanying drawings.
It should be understood that the described embodiments are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
It should be noted that, the terms "upper", "lower", "left", "right", and the like in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements.
As shown in fig. 1-4, the embodiment of the application provides a continuous diffusion type flip energy dissipation structure, which is suitable for spillway engineering adopting flip energy dissipation, and enables a water tongue to be stretched and diffused vertically in the air through continuous change of flip sill flip angle, so that the energy consumption of water flow in the air is improved, the longitudinal length of the water tongue entering a river water cushion is prolonged, and the impact of the water flow on the bottom of a river bed is reduced.
The continuous diffusion type flip bucket energy dissipation structure specifically comprises a chute 1, a side wall 2 and a continuous diffusion type flip bucket 3, wherein the chute 1 is provided with a slope section 11 and a reverse arc section 12, the slope section 11 and the reverse arc section 12 are sequentially arranged along a first direction, the slope section 11 is tangential to the reverse arc section 12, and the first direction is the extending direction from the upstream to the downstream of the chute 1; the side walls 2 are positioned at two sides of the chute 1 along the width direction and extend along the first direction, and the side walls 2 have preset heights; the continuous diffusion flip bucket 3 is provided with an inverted cambered surface, the flip angles of the inverted cambered surface are symmetrically distributed along the central line of the width direction of the chute 1, the flip angles are uniformly changed, the minimum flip angle of the inverted cambered surface is defined as theta 1, the maximum flip angle of the inverted cambered surface is defined as theta 2, and then: theta 1 is more than or equal to 0 degree and less than or equal to 10 degrees, theta 2 is more than or equal to 25 degrees and less than or equal to 35 degrees.
Specifically, the reverse cambered surface of the continuous diffusion type flip bucket 3 is tangent to the reverse arc section 12 of the chute 1, the minimum flip angle theta 1 is generally 0-10 degrees, such as 2 degrees, 7 degrees, 7.5 degrees and the like, and a small value is selected when the lowest bucket roof elevation exceeds the downstream water level by a large amount; the maximum picking angle theta 2 is generally 25-35 degrees, and if the maximum picking angle is too large, the water inlet angle is correspondingly increased, so that the local scouring of water flow to the river bed is aggravated; however, if the maximum flip angle is too small, the flip distance is reduced, the flow velocity on the surface of the water flow is increased, and the bank slope is flushed, so that the bank slope is optimal at 25-35 degrees, and the maximum flip angle is 2-3 degrees larger than that of a continuous flip bucket, so that the bank slope can be preset by integrating actual conditions. In addition, the inclination of the chute, the height of the side wall 2, etc. may be preset and adjusted according to the actual situation, and thus are not limited herein.
In this embodiment, the continuous diffusion type is chosen and is flowed energy dissipation structure through arranging the angle of choosing and is changed in succession, has all stretched whole rivers in facade and along the riverbed direction, is favorable to rivers to spread in the air, increases the energy dissipation effect of air resistance, and the water cushion that dashes into the downstream riverbed after the longitudinal stretching of tab simultaneously, and energy will further disperse to energy and energy distribution density when reducing the tab and going into water not only effectively improve the energy dissipation effect, can also reduce the impact of tab to the riverbed simultaneously, reduce the scour damage. In addition, the change of the picking angle can be achieved through the uniform change of the longitudinal extension length of the anti-arc section 12, the anti-arc radius of the whole picking area is kept consistent, and the continuous change of the picking angle does not cause the increase of the difficulty of construction technology.
As shown in fig. 1-4, in one embodiment, the continuous diffusion flip bucket 3 includes a center flip bucket 31 and side flip buckets 32, the center flip bucket 31 being located in the middle of the continuous diffusion flip bucket 3, the side flip buckets 32 being located on both sides of the continuous diffusion flip bucket 3 adjacent to the side wall 2; if the width of the center flip 31 is defined as a, the width of the side flip 32 is defined as B, and the width of the chute 1 is defined as B: a is more than or equal to 1.5b and less than or equal to 2.0b, and the width of the center flip bucket 31 is not less than 2m; b is more than or equal to 1/10B and less than or equal to 1/5B, and the width of the side flip bucket 32 is not less than 1m. The width B of the chute 1 refers to the clear width of the chute 1, i.e., the width after the side wall 2 is removed. If the width of the flip bucket is smaller than 1m, sharp angles are easily formed at the end parts, the arrangement of reinforcing steel bars is inconvenient, the pouring quality control is not facilitated, in addition, hydraulic damage is easily caused at the sharp angle parts, the width of the middle flip bucket is regulated to be 1.5-2.0 times of the width of the flip bucket at the two sides, the drainage flow of the middle is ensured to be relatively large, the flow at the two sides is reduced, and therefore the impact formed in the riverbed is also that the middle is larger than the two sides. In general, the middle part of the river bed is lower, the shock resistance is better, and the impact on two sides of the river bed is reduced.
As shown in fig. 1 to4, in a specific embodiment, if the radius of the reverse arc surface of the continuous diffusion type flip bucket 3 is defined as R, and the depth of water at the lowest point of the reverse arc is h when the flood gate is fully opened, then: r is more than or equal to 6h and less than or equal to 12h, and when the bottom slope of the chute 1 is steeper and the flow speed or single-width flow rate of the reverse arc section 12 is larger, the radius of the reverse arc surface is larger.
In addition, if the height of the top of the inverted arc surface at the minimum flip angle is defined as H, H is higher than the highest water level downstream of the continuous diffusion flip bucket 3. The height H of the top of the reverse cambered surface at the minimum picking angle is slightly higher than the highest water level at the downstream; the height of the ridge roof is too high, and the water flow does not have enough kinetic energy to influence the picking distance; if the water is too low, the water is close to the water surface, the air distance is short, and the water tongue cannot be fully spread in the air. And the design is controlled by controlling the minimum picking distance to be not less than 0.5 times of dam height (or total water head).
As shown in fig. 1-2, in general, in the first direction, the center flip bucket 31 protrudes outside the side flip bucket 32, the maximum flip angle of the inverted arc surface is located at the middle position of the continuous diffusion flip bucket 3, and the minimum flip angle of the inverted arc surface is located at two sides of the continuous diffusion flip bucket 3.
However, in some other embodiments, as shown in fig. 3-4, when the downstream riverbed is narrow and the chute 1 is wide, the water flows on both sides have unfavorable scour to the sides of the riverbed, and a continuous diffusion flip bucket 3 with a narrow downstream outlet bundle is used. The chute 1 has a beam narrow section 13, the beam narrow section 13 starting at the lowest part of the anti-arc section 12, and the width of the beam narrow section 13 gradually decreases in the first direction. In addition, along the first direction, the center flip bucket 31 is concave in the side flip bucket 32, the minimum flip angle of the reverse cambered surface is located at the middle position of the continuous diffusion flip bucket 3, and the maximum flip angle of the reverse cambered surface is located at two sides of the continuous diffusion flip bucket 3.
In one embodiment, as shown in fig. 3-4, if the turning radius of the side wall 2 defining the narrow beam section 13 is r, and the narrow beam angle of the side wall 2 of the narrow beam section 13 is α, then 2b.ltoreq.r.ltoreq.5b, and when the chute 1 is narrow, the α is generally not greater than 5 °, and the design principle is that the farthest water tongues do not intersect. (Water tongue crossing is easy to impact against the shore, the influence range of a flushing area is enlarged, and when the water tongue is not crossed, the downstream flushing influence is minimum.)
The above is only a preferred embodiment of the present application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (9)
1. A continuous diffusion type pickoff energy dissipation structure, comprising:
The chute is provided with a slope section and an anti-arc section, the slope section and the anti-arc section are sequentially arranged along a first direction, the slope section is tangential to the anti-arc section, and the first direction is the extending direction from the upstream to the downstream of the chute;
the side walls are positioned at two sides of the chute and are arranged along the first direction, and the side walls have preset heights;
The continuous diffusion type flip bucket comprises an inverted cambered surface, the flip angles of the inverted cambered surface are symmetrically distributed along the central line of the width direction of the chute, the flip angles are uniformly changed, the minimum flip angle of the inverted cambered surface is defined as theta 1, the maximum flip angle of the inverted cambered surface is defined as theta 2, and then: theta 1≤10°,25°≤θ2 degrees is more than or equal to 0 degrees and less than or equal to 35 degrees.
2. The continuous diffusion flip energy dissipating structure of claim 1 wherein the continuous diffusion flip bucket comprises a center flip bucket and side flip buckets, the center flip bucket being located in the middle of the continuous diffusion flip bucket, the side flip buckets being located on both sides of the continuous diffusion flip bucket adjacent to the side wall;
Defining the width of the center flip bucket as a, the width of the side flip bucket as B, and the width of the chute as B, then: a is more than or equal to 1.5b and less than or equal to 2.0b, and the width of the center flip bucket is not less than 2m; b is more than or equal to 1/10B and less than or equal to 1/5B, and the width of the side flip bucket is not less than 1m.
3. The continuous diffusion type flip bucket energy dissipation structure according to claim 2, wherein the radius of the reverse arc surface of the continuous diffusion type flip bucket is defined as R, and the depth of water at the lowest point of the reverse arc is h when the flood gate is fully opened, and the following steps are: r is more than or equal to 6h and less than or equal to 12h.
4. The continuous diffusion type flip energy dissipating structure of claim 2 wherein the inverted arc surface of the continuous diffusion flip bucket is tangent to the inverted arc section of the chute.
5. The continuous diffusion flip energy dissipating structure of claim 2 wherein H is higher than the highest water level downstream of the continuous diffusion flip bucket by defining the inverted camber top elevation at the minimum flip angle as H.
6. The continuous diffusion flip energy dissipating structure of any of claims 2-5 wherein in the first direction the center flip bucket projects outwardly from the side flip bucket, the maximum flip angle of the counter-camber surface is located in the middle of the continuous diffusion flip bucket, and the minimum flip angle of the counter-camber surface is located on either side of the continuous diffusion flip bucket.
7. The continuous diffusion trajectory energy dissipating structure of any one of claims 2 to 5, wherein said chute has a beam narrow section starting at the lowest point of said reverse arc section and the width of said beam narrow section tapers in said first direction.
8. The continuous diffusion flip energy dissipating structure of claim 7 wherein in the first direction the center flip bucket is recessed in the side flip bucket, the minimum flip angle of the counter-camber surface is located in the middle of the continuous diffusion flip bucket, and the maximum flip angle of the counter-camber surface is located on both sides of the continuous diffusion flip bucket.
9. The continuous diffusion type cantilever flow energy dissipating structure of claim 8 wherein the turning radius of the side wall defining the beam narrow section is r, and the side wall beam narrow angle of the beam narrow section is α, then 2B is equal to or less than 5B, and α is not greater than 5 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410336270.3A CN118187005A (en) | 2024-03-22 | 2024-03-22 | Continuous diffusion type flow-picking energy dissipation structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410336270.3A CN118187005A (en) | 2024-03-22 | 2024-03-22 | Continuous diffusion type flow-picking energy dissipation structure |
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| CN118187005A true CN118187005A (en) | 2024-06-14 |
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| CN202410336270.3A Pending CN118187005A (en) | 2024-03-22 | 2024-03-22 | Continuous diffusion type flow-picking energy dissipation structure |
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- 2024-03-22 CN CN202410336270.3A patent/CN118187005A/en active Pending
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