CN211690240U - Bottom flow energy dissipation structure for small-opening discharge of gate dam - Google Patents
Bottom flow energy dissipation structure for small-opening discharge of gate dam Download PDFInfo
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- CN211690240U CN211690240U CN202020020602.4U CN202020020602U CN211690240U CN 211690240 U CN211690240 U CN 211690240U CN 202020020602 U CN202020020602 U CN 202020020602U CN 211690240 U CN211690240 U CN 211690240U
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- bottom plate
- stilling pool
- energy dissipation
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Abstract
The utility model provides an underflow energy dissipation structure for small-opening discharge of a gate dam, which comprises a stilling pool bottom plate; the left side and the right side of the stilling pool bottom plate are both provided with stilling pool side walls, the upper side of the stilling pool bottom plate is provided with a tail ridge, and the tail ridge comprises a tail ridge reverse slope section connected with the stilling pool bottom plate; and a tail sill notch is formed in the reverse slope section of the tail sill, and a plurality of tail sill vertical sections which are uniformly distributed are arranged on the tail sill notch. The utility model provides the high energy dissipation effect has reduced the out-of-pool rivers and has destroyed the washing away of sea inundation, and this structure is favorable to rushing out the silt of interior siltation of absorption basin to low reaches river course simultaneously.
Description
Technical Field
The utility model relates to an underflow dissipation structure for small aperture earial drainage of floodgate dam belongs to hydraulic and hydroelectric engineering design technical field.
Background
The downstream energy dissipation mode of the dam mainly comprises trajectory energy dissipation, underflow energy dissipation, surface flow energy dissipation and bucket energy dissipation, wherein the underflow energy dissipation is a traditional energy dissipation mode and has the advantages of stable fluid state in a pool, high energy dissipation efficiency, strong adaptability to geological condition change, small flood discharge atomization shadow, almost no influence on the surrounding environment and the like.
In the gate dam engineering, underflow energy dissipation is mostly adopted, but the traditional underflow energy dissipation structure has the following defects: when the sluice is in a small-opening drainage working condition, the water level at the downstream of the sluice chamber is shallow, the water flow drained from the orifice of the sluice chamber is shot into a sea structure after being picked up at the tail sill of the stilling pool, and the washout damage of the sea structure can be caused due to the shallow water level at the downstream, and the silt deposited in the stilling pool is not favorably flushed out to a downstream river channel, for example, the stilling pool with a continuous incident angle disclosed in the Chinese patent with the publication number CN110284469A, the falling sill stilling pool disclosed in the Chinese patent with the publication number CN207314297U and the underflow energy dissipation structure suitable for extending a wide-tail pier to the stilling pool disclosed in the Chinese patent with the publication number CN 412092796 are disclosed.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem, the utility model provides an underflow dissipation structure for sluice dam aperture earial drainage, this underflow dissipation structure for sluice dam aperture earial drainage can improve the energy dissipation effect, reduces out the pool rivers and destroys swashing away of sea overflow, can also wash out the part silt of siltation in the pool that disappears to low reaches river course simultaneously.
The utility model discloses a following technical scheme can realize.
The utility model provides an underflow energy dissipation structure for small-opening discharge of a gate dam, which comprises a stilling pool bottom plate; the left side and the right side of the stilling pool bottom plate are both provided with stilling pool side walls, the upper side of the stilling pool bottom plate is provided with a tail ridge, and the tail ridge comprises a tail ridge reverse slope section connected with the stilling pool bottom plate; and a tail sill notch is formed in the reverse slope section of the tail sill, and a plurality of tail sill vertical sections which are uniformly distributed are arranged on the tail sill notch.
The stilling pool bottom plate, the reverse slope section of the tail ridge, the vertical section of the tail ridge and the notch of the tail ridge are arranged along the water flow direction.
The slope ratio of the reverse slope section of the tail bank is 1: 0.5-1: 1.
The width of the notch of the tail ridge is 0.5-1 m.
The distance between the vertical sections of the end sill is 0.8-1 m.
The beneficial effects of the utility model reside in that: the energy dissipation effect is improved, the scouring damage of the water flow out of the pool to the sea is reduced, and the structure is favorable for flushing out the silt deposited in the stilling pool to a downstream river channel.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic diagram of the end sill of FIG. 1;
in the figure: 1-stilling pool bottom plate, 2-stilling pool side wall, 3-tail ridge reverse slope section, 4-tail ridge vertical section and 5-tail ridge notch.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
As shown in fig. 1 and fig. 2, an underflow energy dissipation structure for small-opening discharge of a gate dam comprises a stilling pool bottom plate 1; the left side and the right side of the stilling pool bottom plate 1 are both provided with stilling pool side walls 2, the upper side of the stilling pool bottom plate 1 is provided with a tail ridge, and the tail ridge comprises a tail ridge reverse slope section 3 connected with the stilling pool bottom plate 1; the back slope section 3 of the tail sill is provided with a tail sill notch 5, and the tail sill notch 5 is provided with a plurality of tail sill vertical sections 4 which are uniformly distributed.
The stilling pool bottom plate 1, the reverse slope section 3 of the tail ridge, the vertical section 4 of the tail ridge and the notch 5 of the tail ridge are arranged along the water flow direction.
The slope ratio of the reverse slope section 3 of the tail bank is 1: 0.5-1: 1.
The width of the tail sill notch 5 is 0.5-1 m.
The distance between the vertical sections 4 of the end sill is 0.8-1 m.
Specifically, the structure is provided with a stilling pool bottom plate 1, a tail sill reverse slope section 3, a tail sill vertical section 4 and a tail sill notch 5 along the water flow direction, when a sluice is in a small-opening drainage working condition, the water level at the lower part of the sluice chamber is shallow, water flow flowing down from the sluice chamber orifice is subjected to discharge along the stilling pool bottom plate 1 and the tail sill to the downstream, by arranging the tail sill reverse slope section 3 and the tail sill notch 5 at the tail sill, a part of water flow is subjected to the radiation action of the tail sill reverse slope section 3 and is then radiated from the tail sill reverse slope section 3, the other part of water flow flows are discharged from the tail sill notch 5, and two water flows are fully mixed before flowing into the sea, so that the energy dissipation effect is improved, the scouring damage of the water flow out of the pool to the sea overflow is reduced, meanwhile, the structure is favorable for flushing sediment deposited in the stilling pool to the downstream river channel sediment, and the cleaning work of the stilling pool is reduced.
Preferably, the structure consists of ordinary concrete and impact and wear resistant concrete, wherein the ordinary concrete is generally selected from C25, the impact and wear resistant concrete is generally selected from C35 and above, and the structure is positioned on the surface layer of the structure and has the thickness of about 0.5 m.
Specifically, the utility model discloses a set up anti-slope section and notch in tail bank department, some rivers will be chosen away from the anti-slope section of tail bank under the jet effect of anti-slope section, and another part rivers will flow from the tail bank notch, and two strands of rivers fully mix before the ocean current of flowing in, and collision each other has improved the energy dissipation effect, has reduced out the pool rivers and has destroyed the washing away of ocean, and this structure is favorable to rushing out the silt of siltation in the absorption basin to low reaches river course simultaneously.
In conclusion, the back slope section 3 and the groove opening 5 of the tail ridge are arranged at the tail ridge, so that the energy dissipation effect is improved, the scouring damage of the water flow out of the pool to the sea is reduced, and the silt deposited in the stilling pool is favorably flushed out to a downstream river channel.
Claims (5)
1. The utility model provides an underflow dissipation structure for small-opening discharge of gate dam, includes stilling pool bottom plate (1), its characterized in that: the left side and the right side of the stilling pool bottom plate (1) are both provided with stilling pool side walls (2), the upper side of the stilling pool bottom plate (1) is provided with a tail ridge, and the tail ridge comprises a tail ridge reverse slope section (3) connected with the stilling pool bottom plate (1); the tail sill reverse slope section (3) is provided with a tail sill notch (5), and the tail sill notch (5) is provided with a plurality of tail sill vertical sections (4) which are uniformly distributed.
2. The underflow energy dissipation structure for small-opening discharge of gate dam as claimed in claim 1, wherein: the stilling pool bottom plate (1), the reverse slope section (3) of the tail bank, the vertical section (4) of the tail bank and the notch (5) of the tail bank are arranged along the water flow direction.
3. The underflow energy dissipation structure for small-opening discharge of gate dam as claimed in claim 1, wherein: the slope ratio of the reverse slope section (3) of the tail bank is 1: 0.5-1: 1.
4. The underflow energy dissipation structure for small-opening discharge of gate dam as claimed in claim 1, wherein: the width of the tail sill notch (5) is 0.5-1 m.
5. The underflow energy dissipation structure for small-opening discharge of gate dam as claimed in claim 1, wherein: the distance between the vertical sections (4) of the end sill is 0.8-1 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020020602.4U CN211690240U (en) | 2020-01-06 | 2020-01-06 | Bottom flow energy dissipation structure for small-opening discharge of gate dam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020020602.4U CN211690240U (en) | 2020-01-06 | 2020-01-06 | Bottom flow energy dissipation structure for small-opening discharge of gate dam |
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| CN211690240U true CN211690240U (en) | 2020-10-16 |
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| CN202020020602.4U Active CN211690240U (en) | 2020-01-06 | 2020-01-06 | Bottom flow energy dissipation structure for small-opening discharge of gate dam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113279373A (en) * | 2021-02-08 | 2021-08-20 | 中国水电基础局有限公司 | Concrete warehousing complete method and hydropower station open channel repairing method |
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2020
- 2020-01-06 CN CN202020020602.4U patent/CN211690240U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113279373A (en) * | 2021-02-08 | 2021-08-20 | 中国水电基础局有限公司 | Concrete warehousing complete method and hydropower station open channel repairing method |
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