CN109750641B - Outlet energy dissipation arrangement structure for concentrated arrangement of different water discharge buildings on water and electricity engineering bank - Google Patents
Outlet energy dissipation arrangement structure for concentrated arrangement of different water discharge buildings on water and electricity engineering bank Download PDFInfo
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- CN109750641B CN109750641B CN201910126111.XA CN201910126111A CN109750641B CN 109750641 B CN109750641 B CN 109750641B CN 201910126111 A CN201910126111 A CN 201910126111A CN 109750641 B CN109750641 B CN 109750641B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 230000005611 electricity Effects 0.000 title description 4
- 238000007599 discharging Methods 0.000 claims abstract description 18
- 230000007704 transition Effects 0.000 claims abstract description 15
- 238000005192 partition Methods 0.000 claims abstract description 10
- 238000012876 topography Methods 0.000 claims description 4
- 238000009792 diffusion process Methods 0.000 description 6
- 238000000889 atomisation Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
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Abstract
The invention discloses an outlet energy dissipation arrangement structure for centralized arrangement of different water discharge buildings on the sides of a hydroelectric engineering, wherein the included angle between the axis of a flood discharge tunnel and the axis of a spillway is smaller, the outlet parts of the two structures share an energy dissipation pool for dissipating energy, the plane of the energy dissipation pool is in asymmetric horn-shaped arrangement, the bottom of the energy dissipation pool consists of a slope transition section and a horizontal section, and an auxiliary energy dissipation facility comprises a diversion pier, a submerged middle partition wall, a wavy anti-arc small flip bucket and a guard; the diversion pier is positioned on the slope transition section of the stilling pool, and the starting end is positioned at the middle parts of the flood discharging tunnel outlet and the spillway outlet and is a widened and equal-top elevation partition wall; the submerged intermediate wall is positioned at the downstream of the split pier and is a variable-roof-height partition wall with equal width and gradually increased height, and the split pier and the submerged intermediate wall divide the stilling pool into a left part and a right part; the invention solves the problem of insufficient rotation and energy dissipation of high-speed asymmetric water flow when the outlets of different flood discharge buildings adopt the same asymmetric stilling pool for centralized energy dissipation, and saves engineering investment.
Description
Technical Field
The invention relates to an energy dissipation arrangement mode of water and electricity engineering water discharge buildings, in particular to an outlet energy dissipation arrangement structure for centralized arrangement of different water discharge buildings on the shore of a shore water and electricity engineering.
Background
The bank water discharge buildings in the hydropower engineering have different discharge distribution, and are often distributed and partitioned to dissipate energy so as to reduce the influence of flushing and atomization. Due to the limitation of the topography and geological conditions, a shoreside water discharge building such as a spillway tunnel and a spillway of partial engineering can adopt a concentrated arrangement mode of concentrated energy dissipation of outlets, and in order to reduce the problems of flushing and atomization, the energy dissipation mode of the outlet part is mainly based on energy dissipation of a stilling pool; because of different drainage, water inlet angles and the like of different buildings, different stilling tanks are often adopted by different buildings to ensure energy dissipation effect; when sharing a stilling pool, it is often necessary to limit the manner in which the drainage building operates. However, when the drainage building shares a stilling pool and the operation mode is limited by the operation condition and cannot be controlled, the rapid water flow entering the stilling pool can form unfavorable flow states such as rotation, deviation and the like, so that the water flow in the pool is insufficient in energy dissipation. And after the water which is not fully energy-dissipated flows out of the pool, larger energy still exists, and secondary energy dissipation is needed, so that the increase of engineering investment is brought, and the difficulty of building arrangement is increased.
In order to save engineering investment and increase flexibility and safety of engineering application, the problem that concentrated energy dissipation is needed to be studied when different water discharge buildings on the shore are arranged in a concentrated mode, particularly the problems that an included angle exists between the axes of the water discharge buildings, the distribution difference of the water discharge is large, when the water discharge buildings share one energy dissipation pool for concentrated energy dissipation, the rapid flow enters the water flow in the energy dissipation pool to deflect, the energy dissipation is insufficient and the like are solved.
Disclosure of Invention
The invention aims to solve the technical problem of providing an outlet energy dissipation arrangement structure for centralized arrangement of different water discharge buildings on the sides of a hydropower project, and solves the problems of different discharge, deflection of different pond entering angles, insufficient energy dissipation and the like.
The technical scheme adopted by the invention is as follows: the utility model provides an export energy dissipation arrangement structure when different spillway buildings of hydroelectric engineering bank are concentrated and are arranged, including spillway, stilling basin and auxiliary energy dissipation facility, spillway axis contained angle is less, two exit positions share stilling basin energy dissipation, stilling basin and auxiliary energy dissipation facility are located spillway export low reaches of spillway, stilling basin is built by the side wall that is located both sides, take the form of asymmetric loudspeaker arrangement on the plane, the bottom is by slope changeover portion and horizontal segment constitution, auxiliary energy dissipation facility includes the split pier, submerged intermediate wall, wave form anti-arc small flip bucket and the protective clothing that is located stilling basin low reaches; the diversion pier is positioned on the slope transition section of the stilling pool, and the starting end is positioned at the middle parts of the flood discharging tunnel outlet and the spillway outlet and is a widened and equal-top elevation partition wall; the submerged intermediate wall is positioned at the downstream of the split pier and is a variable-roof-height partition wall with equal width and gradually increased height, and the split pier and the submerged intermediate wall divide the stilling pool into a left part and a right part; the wave-shaped reverse arc small flip bucket is positioned on the slope transition section of the stilling pool, the front end of the wave-shaped reverse arc small flip bucket is connected with the outlet end of the flood discharging tunnel, one side of the wave-shaped reverse arc small flip bucket is connected with the diversion pier, the other side of the wave-shaped reverse arc small flip bucket is connected with the side wall of the stilling pool, and the top of the flip bucket is in a wave shape on the tail end plane.
The guard bars are arranged into an equal-altitude equal-width or slope widening structure according to the topography and geological conditions.
The included angle between the axis of the flood discharging tunnel and the axis of the spillway is 0-10 degrees.
The wave is composed of three sections of circular arcs with equal radius.
The beneficial effects of the invention are as follows:
(1) The problems of deflection and insufficient energy dissipation of the water flow entering the stilling pool when the building is used alone and in combination are solved, the secondary energy dissipation of the water flow exiting the stilling pool is avoided, and the engineering investment is saved.
(2) After the engineering is put into operation, the drainage building can be used alone or in combination, and the operation mode is not limited, so that the flexibility and reliability of engineering operation are improved.
Drawings
Fig. 1 is a schematic plan layout view of an outlet energy dissipation layout structure when different water discharge buildings on the bank of the hydroelectric engineering are arranged in a concentrated mode.
Fig. 2 is a longitudinal cross-sectional view of the spillway tunnel section of fig. 1.
Fig. 3 is a longitudinal cross-sectional view of the spillway section of fig. 1.
Fig. 4 is an enlarged view of the wave-shaped anti-arc flip-flop planar layout.
Fig. 5 is a longitudinal sectional view of the submerged intermediate wall.
In the figure: 1-flood discharge hole; 2-spillway; 3-a stilling pool; 4-side walls; 5-split piers; 6-submerged intermediate wall; 7-waveform anti-arc small flip bucket; 8-daycare.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and detailed description:
As shown in fig. 1-5, the outlet energy dissipation arrangement structure for concentrated arrangement of different water discharge buildings on the sides of the hydroelectric engineering comprises a flood discharging tunnel 1, a spillway 2, a relief tank 3 and auxiliary energy dissipation facilities, wherein the included angle between the axis of the flood discharging tunnel 1 and the axis of the spillway 2 is smaller, the outlet parts of the flood discharging tunnel 1 and the spillway are shared by the two energy dissipation tanks 3 for dissipating energy, the relief tank 3 and the auxiliary energy dissipation facilities are positioned at the downstream of the outlet of the flood discharging tunnel and the spillway, the relief tank 3 is formed by surrounding side walls 4 positioned at two sides, the plane is in asymmetric horn-shaped arrangement, the bottom is composed of a slope transition section and a horizontal section, and the auxiliary energy dissipation facilities comprise a diversion pier 5, a submerged middle partition wall 6, a waveform anti-arc small flip bucket 7 and a protection table 8 positioned at the downstream of the relief tank 3; the diversion pier 5 is positioned on the slope transition section of the stilling pool, and the initial end is positioned at the middle part of the outlet of the spillway tunnel 1 and the outlet of the spillway 2 and is a widened equal-top elevation partition wall; the submerged intermediate wall 6 is positioned at the downstream of the dividing pier 5 and is a variable-roof-height dividing wall with equal width and gradually increased height, and the dividing pier 5 and the submerged intermediate wall 6 divide the stilling pool 3 into a left part and a right part; the wavy reverse arc small flip bucket 7 is positioned on the slope transition section of the stilling pool, the front end of the wavy reverse arc small flip bucket is connected with the outlet end of the flood discharging tunnel 1, one side of the wavy reverse arc small flip bucket is connected with the diversion pier 5, the other side of the wavy reverse arc small flip bucket is connected with the stilling pool side wall 4, and the top of the flip bucket is in a wavy shape on the tail end plane.
The guard bands 8 are arranged into an equal-altitude equal-width or slope width-widening structure according to the topography and geological conditions.
The included angle between the axis of the flood discharging tunnel 1 and the axis of the spillway 2 is 0-10 degrees.
The wave is composed of three sections of circular arcs with equal radius.
The following is a detailed description of embodiments:
And (3) a certain large (1) pumped storage power station, wherein flood discharging holes and flood spillways in the lower warehouse are arranged on one side of the mountain in a concentrated mode, the included angle between the axes of the flood discharging holes and the flood spillways is 3 degrees, and the downstream of the outlet shares a stilling pool for energy dissipation. The top elevation of the bottom plate at the inlet of the flood discharge tunnel is 180m, the longitudinal slope of the chute is 5.9%, the top elevation of the bottom plate at the outlet part is 165m, the maximum discharge amount is 766.98m 3/s, and the single-width flow is close to 153.4m 3/s.m. The height of the spillway weir top is 223m, the longitudinal slope of the spillway is 31.0%, the height of the bottom plate top at the outlet part is 165m, the maximum leakage is 224.41m 3/s, and the single-width flow is approximately 44.9m 3/s.m. The flood discharging tunnel and the flood spillway water flow into the pond in a rapid flow mode, the flow speed is high, rapid diffusion cannot be achieved after the flood discharging tunnel and the flood spillway water flow into the stilling pond, the pond depth is not large, the rotation problem can occur in the water flow on the plane, the energy dissipation is insufficient, and serious scouring can be caused to downstream river channels. To solve this problem the project employs the outlet energy dissipation arrangement of the present invention.
As shown in fig. 1-5, the energy dissipation arrangement pattern of the outlet of the spillway building comprises a spillway tunnel 1, a spillway 2, an outlet stilling pool 3 and auxiliary energy dissipation facilities, wherein the included angle between the axis of the spillway tunnel 1 and the axis of the spillway 2 is smaller than 3 degrees, and the two outlet parts share one stilling pool 3 for energy dissipation. The stilling pool 3 is formed by surrounding side walls 4, and is asymmetrically arranged in a horn shape on the plane; the bottom consists of a slope transition section and a horizontal section, the projection length of the slope transition section is 40m, and the gradient is 20%; the length of the horizontal section is 55m, and the top elevation of the bottom plate is 157.0m. The right side wall 3 is arranged in a straight line, and is diffused in the whole length, and the diffusion angle is 9 degrees; the left side wall 3 is arranged in a fold line, the front section diffuses until the end of the slope transition section of the stilling pool, the diffusion angle is 4 degrees, and then the straight line is parallel to the submerged intermediate wall 6.
In order to solve the problems of diffusion rotation and the like of water flow after the rapid flow enters an asymmetric stilling pool, a wave-shaped anti-arc small flip bucket 7 is arranged at the pool inlet of the flood discharge tunnel 1, and the water flow entering the pool is pulled along the cross section; the left side of the wavy anti-arc small flip bucket 7 is connected with the split pier 5, the right side of the wavy anti-arc small flip bucket is connected with the right side wall 4 of the stilling pool, and the tail end plane is wavy; the wave consists of three arcs with equal radius, the radius of the arcs is 2m, the central angle of the middle arc is 151 degrees, and the central angles of the arcs at two sides are 68 degrees; the top of the wave-shaped flip bucket is in an anti-arc shape, the radius of the anti-arc is 35m, and the top elevation of the bucket tail end is 165.89m. Simultaneously, the slope transition section of the stilling pool 3 is narrowed on the plane arrangement, so that the inflow angle of the water flow entering the pool is reduced; in order to make the water flows into the flood discharge tunnel 1 and the spillway 2 as symmetrical as possible, the right side wall of the stilling pool 3 is diffused rightward from the outlet end of the flood discharge tunnel 1 to the end of the stilling pool 3 at a 9-degree diffusion angle, the right side line of the diversion pier 5 is also diffused leftward from the outlet end of the flood discharge tunnel 1 at a 9-degree diffusion angle, and the right side boundary of the water outlet of the spillway 2 (i.e. the left side line of the diversion pier 5) extends downward to the same position to form the diversion pier 5 of the slope transition section of the stilling pool 3. The length of the diversion pier 5 is 31.3m, the top elevation is 173.0m, the water surface is vertical, and the transverse width of the tail end is 2.5m. In order to fully utilize the water energy dissipation of the stilling pool 3, the tail end of the diversion pier 5 is provided with submerged intermediate walls 6 with two upright sides facing the water surface, the width of each partition wall is 2.5m, the height of each wall in the length range of the front 8.7m is gradually changed from 0 to 4.5m, and then the height of each wall is gradually changed from 4.5m to 12.0m. The dividing pier 5 and the submerged intermediate wall 6 divide the stilling pool 3 into two parts with unequal sizes and through left and right. A 40m long guard is arranged behind the stilling pool, and the height of the guard top is 164.0m.
The flood discharging tunnel 1 is provided with the wavy anti-arc small flip bucket 7 at the entrance of the tunnel, the slope transition section of the narrow stilling pool 3 and the arrangement pattern of the diversion pier 5 and the submerged intermediate wall 6 in the stilling pool 3, so that when the flood discharging tunnel 1 and the spillway 2 are operated independently and operated in a combined mode, independent water leaps can be formed in the stilling pool 3, the problem of water flow deflection of the emergency inflow pool is basically solved, the energy dissipation rate is improved, the reinforced concrete engineering quantity of the submerged intermediate wall 6 is saved, and the engineering operation is flexible and reliable.
The above-described embodiments are only for illustrating the technical spirit and features of the present invention, and it is intended that those skilled in the art can understand the content of the present invention and implement it accordingly, and the scope of the present invention is not limited to the embodiments, i.e. equivalent changes or modifications to the spirit of the present invention will still be within the scope of the present invention.
Claims (2)
1. The utility model provides an export energy dissipation arrangement structure when different spillway buildings of hydroelectricity engineering bank are concentrated and are arranged, including spillway (1), spillway (2), stilling pool (3) and supplementary energy dissipation facility, spillway (1) axis and spillway (2) axis contained angle are less, two exit portions share one stilling pool (3) energy dissipation, stilling pool (3) and supplementary energy dissipation facility are located spillway and spillway export low reaches, characterized in that, stilling pool (3) are built by being located side wall (4) of both sides in the surrounding, be asymmetric loudspeaker arrangement on the plane, the bottom is by slope changeover portion and horizontal segment constitution, supplementary energy dissipation facility includes split pier (5), submerged intermediate wall (6), wave form anti-arc small flip bucket (7) and protection ridge (8) that are located stilling pool (3) low reaches; the diversion pier (5) is positioned on the slope transition section of the stilling pool, and the starting end is positioned at the middle part of the outlet of the spillway tunnel (1) and the outlet of the spillway (2) and is a widened equal-top elevation partition wall; the submerged intermediate wall (6) is positioned at the downstream of the split pier (5) and is a variable-top elevation partition wall with equal width and gradually increased height, and the split pier (5) and the submerged intermediate wall (6) divide the stilling pool (3) into a left part and a right part; the wave-shaped anti-arc small flip bucket (7) is positioned on the slope transition section of the stilling pool, the front end of the wave-shaped anti-arc small flip bucket is connected with the outlet end of the flood discharging tunnel (1), one side of the wave-shaped anti-arc small flip bucket is connected with the diversion pier (5), the other side of the wave-shaped anti-arc small flip bucket is connected with the stilling Chi Bianqiang (4), the top of the flip bucket is in an anti-arc shape, the wave-shaped anti-arc small flip bucket is in a wave shape on the tail end plane, the included angle between the axis of the flood discharging tunnel (1) and the axis of the spillway (2) is 0-10 degrees, and the wave consists of three sections of circular arcs with equal radius.
2. The outlet energy dissipation arrangement structure when different water discharge buildings on the sides of the hydroelectric engineering are arranged in a concentrated mode according to claim 1, wherein the guard (8) is arranged into an equal-altitude equal-width or slope-width structure according to the topography and geological conditions.
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| CN110258599B (en) * | 2019-06-04 | 2024-02-13 | 中国电建集团成都勘测设计研究院有限公司 | Full hole section of diversion tunnel overhauls cofferdam structure in early and middle stages |
| CN111809579B (en) * | 2020-07-02 | 2022-02-18 | 中国电建集团贵阳勘测设计研究院有限公司 | Self-aeration ternary hydraulic jump stilling basin |
| CN116657561B (en) * | 2023-08-02 | 2023-12-01 | 中水君信工程勘察设计有限公司 | Energy dissipation structure shared by diversion tunnel and spillway |
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| CN104404926A (en) * | 2014-10-08 | 2015-03-11 | 四川大学 | Overflow dam with dam face cantilever sills for current diversion and energy dissipation |
| CN209779577U (en) * | 2019-02-20 | 2019-12-13 | 中国电建集团北京勘测设计研究院有限公司 | Outlet energy dissipation arrangement structure for concentrated arrangement of different water release structures on shore in hydroelectric engineering |
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- 2019-02-20 CN CN201910126111.XA patent/CN109750641B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101408022A (en) * | 2008-11-05 | 2009-04-15 | 福建省水利水电勘测设计研究院 | Water gate dipper type shunting energy dissipating rushing-proof technology |
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