CN211421064U - River bank spillway - Google Patents
River bank spillway Download PDFInfo
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- CN211421064U CN211421064U CN201921885612.8U CN201921885612U CN211421064U CN 211421064 U CN211421064 U CN 211421064U CN 201921885612 U CN201921885612 U CN 201921885612U CN 211421064 U CN211421064 U CN 211421064U
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Abstract
The utility model discloses a river bank spillway belongs to the hydraulic engineering field, include with the river course communicate with each other and be less than 90 first inlet channel with the contained angle of rivers orientation in the river course, communicate with each other with the river course and be greater than the contained angle of rivers orientation in first inlet channel and the river course and be less than 90 second inlet channel, with the communicating buffer pool of first inlet channel and second inlet channel and with the buffer pool intercommunication for the flood discharge groove with the log raft play in the buffer pool. The included angle between the first water inlet channel and the water flow direction in the river channel is 30-45 degrees, and the included angle between the second water inlet channel and the water flow direction in the river channel is 60-75 degrees. And a third water inlet channel is arranged between the second water inlet channel and the buffer pool and is vertical to the water flow direction in the river channel. The utility model discloses can effectively reduce the velocity of flow of discharging into below river course internal water, protect the integrality in river course.
Description
Technical Field
The utility model belongs to the technical field of hydraulic engineering's technique and specifically relates to a river bank spillway is related to.
Background
The spillway is the flood control equipment of water conservancy buildings such as reservoir, builds one side at the dam more, like a vat, and when the water level exceeded safety limit in the reservoir, water just flowed downstream from the spillway, prevented that the dam from being destroyed.
Whether the design and the arrangement of the spillway are reasonable or not only directly influences the safety of the reservoir, but also relates to the whole construction cost. The earth-rock dam generally occupies 25-30% of the construction cost of reservoir hub projects and 25% of labor force, so that the reasonable layout and type selection of the spillway are important links in reservoir project design. Key words: the design and the arrangement of the countermeasure spillway for the common problems of the spillways of the small and medium-sized reservoirs of the earth-rock dams are reasonable, so that the safety of the reservoirs is directly influenced, and the whole construction cost is related. The earth-rock dam generally occupies 25-30% of the construction cost of reservoir hub projects and 25% of labor force, so that the reasonable layout and type selection of the spillway are important links in reservoir project design.
Except that rational overall arrangement and lectotype, a problem that still need consider is exactly the problem of scouring to the rear river course, the velocity of water flow in the spillway is fast, flow into behind the below river course, can cause serious scouring to the river course, can destroy the ecology in river course on the one hand, on the other hand can lead to the hollowing to appear in the junction of spillway and river course, the inside that leads to the spillway appears the crack, local crack can appear and subside for a long time, seriously influence the life of spillway.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a bank spillway, this bank spillway utilize the striking of rivers itself to realize reducing the purpose of the velocity of water in the spillway.
The above object of the present invention can be achieved by the following technical solutions:
a riparian spillway comprising:
the first water inlet channel is communicated with the river channel, and the included angle between the first water inlet channel and the water flow direction in the river channel is less than 90 degrees;
the second water inlet channel is communicated with the river channel, and the included angle between the second water inlet channel and the water flow direction in the river channel is larger than the included angle between the first water inlet channel and the water flow direction in the river channel and is smaller than 90 degrees;
the buffer pool is communicated with the first water inlet channel and the second water inlet channel;
and the flood discharge groove is communicated with the buffer pool and is used for discharging water in the buffer pool.
The utility model discloses an embodiment: the included angle between the first water inlet channel and the water flow direction in the river channel is 30-45 degrees;
the included angle between the second water inlet channel and the water flow direction in the river channel is 60-75 degrees.
The utility model discloses an embodiment: a third water inlet channel is arranged between the second water inlet channel and the buffer pool;
the third water inlet channel is perpendicular to the water flow direction in the river channel.
The utility model discloses an embodiment: an arc-shaped buffer section is arranged between the second water inlet channel and the third water inlet channel.
The utility model discloses an embodiment: the bottom surface of the flood discharge groove is in a step shape;
along the water flow direction, the bottom surfaces of the flood discharge grooves are sequentially lowered.
The utility model discloses an embodiment: a guide channel is arranged on the stepped bottom surface of the flood discharge groove;
the guide channels are obliquely arranged, and the inclination directions of the adjacent guide channels are opposite.
The utility model discloses an embodiment: a chamfer is arranged on the stepped bottom surface of the flood discharge groove;
the axis of the chamfer is perpendicular to the direction of water flow in the flood discharge groove.
The utility model discloses an embodiment: the stepped bottom surface of the flood discharge groove is obliquely arranged;
along the water flow direction in the flood discharge groove, the water outflow end of the stepped bottom surface of the flood discharge groove is lower than the water inflow end.
The utility model has the advantages of:
1. rivers in first inlet channel and the second inlet channel collect in the buffer pool, and the flow direction of two water flows is different, collects the in-process, and two water flows are impacted each other, and partial kinetic energy offsets each other, and the velocity of flow of rivers reduces, and from the current velocity decline in flood discharge groove inflow river course like this, can reduce its washing away to the river course of below.
2. The flood discharge groove has adopted the setting of stairstepping to increased the direction passageway inconsistent with the rivers direction on the bottom surface, rivers are at the in-process that flows, constantly take place the striking with the flood discharge groove bottom surface, and under the guide of direction passageway, the rivers direction of flood discharge groove bottom surface is inconsistent with the rivers direction in the flood discharge groove, can further reduce the kinetic energy of rivers like this, can also strengthen the turbulent motion of rivers, can further consume the kinetic energy of rivers like this, play the effect that reduces the velocity of flow.
Drawings
Fig. 1 is a bird's eye view provided by an embodiment of the present invention.
Fig. 2 is a schematic water flow diagram based on fig. 1 provided by an embodiment of the present invention.
Fig. 3 is a schematic plan view of a flood discharge trough according to an embodiment of the present invention.
Fig. 4 is a schematic perspective view of a flood discharge trough according to an embodiment of the present invention.
In the figure, 11, a first water inlet channel, 12, a second water inlet channel, 13, a buffer pool, 14, a flood discharge groove, 141, a guide channel, 142, a chamfer, 15 and a third water inlet channel.
Detailed Description
In the following, the scheme in the embodiment of the present invention is described clearly and completely with reference to the attached drawings of the embodiment of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and are not intended as a complete description of the invention. Based on the embodiments in the present invention, those skilled in the art can obtain other embodiments without creative work, and all of them belong to the protection scope of the present invention.
Unless specifically stated otherwise, the relative arrangement of parts and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.
Also, it should be understood that the dimensions of the various parts shown in the drawings are not drawn to scale for ease of description.
Well-known techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification as appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined in a figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 1 and 2, a river bank spillway mainly comprises a first water inlet channel 11, a second water inlet channel 12, a buffer pool 13 and a flood discharge trough 14, wherein the first water inlet channel 11 and the second water inlet channel 12 are both connected to a river channel for leading out water exceeding a water level line in the river channel, the buffer pool 13 is arranged at one side of the river channel and connected to the first water inlet channel 11 and the second water inlet channel 12, two ends of the flood discharge trough 14 are respectively connected to the buffer pool 13 and the river channel below, and water in the first water inlet channel 11 and the second water inlet channel 12 flows into the river channel below from the flood discharge trough 14 after being collected by the buffer pool 13.
The included angle between the first water inlet channel 11 and the water flow direction in the river channel is smaller than 90 degrees, and the included angle is 30-45 degrees under the general condition, so that the impact of water flow on the inner wall of the first water inlet channel 11 can be reduced, and the included angle between the first water inlet channel 11 and the second water inlet channel 12 can be increased, so that the kinetic energy consumption of water flow during collection is increased.
The included angle between the second water inlet channel 12 and the water flow direction in the river channel is less than 90 degrees, but is greater than the included angle between the first water inlet channel 11 and the water flow direction in the river channel, generally 60-75 degrees, so that the crossing angle of the water in the two water inlet channels when the water is converged in the buffer pool 13 can be increased, the kinetic energy consumption of the water flow is further increased, and the flow rate of the water flow is reduced.
The buffer pool 13 is generally circular in shape, and has more uniform stress on the arc-shaped side wall, better adaptability to water flow impact and longer service life.
In order to relieve the impact of the water flow in the second water inlet channel 12 on the buffer pool 13 and increase the included angle between the water flow in the second water inlet channel 12 and the water flow in the first water inlet channel 11, a third water inlet channel 15 is added between the second water inlet channel 12 and the buffer pool 13, and the third water inlet channel 15 is perpendicular to the water flow direction in the river channel. In consideration of the impact of the water flow on the junction, a section of arc-shaped buffer section 16 is additionally arranged between the second water inlet channel 12 and the third water inlet channel 15, so that the water flowing out of the second water inlet channel 12 flows into the third water inlet channel 15 after being guided by the arc-shaped buffer section 16.
Referring to fig. 3 and 4, after the above-mentioned treatment, the velocity of the water in the flood discharge trough 14 is significantly reduced, but during the flowing process, a part of gravitational potential energy is converted into kinetic energy, that is, the velocity of the water in the flood discharge trough 14 is increased during the flowing process. In order to reduce the influence caused by the gravitational potential energy, the bottom surface of the flood discharge groove 14 is designed into a step shape, so that water in the flood discharge groove 14 can continuously collide with the bottom surface of the step shape in the flowing process, the kinetic energy of the water flow can be consumed in the collision process, and the flow speed cannot be increased.
The inclined guide channel 141 is additionally arranged on the bottom surface of the step shape, so that the flow direction of the water flow close to the bottom surface is changed when the water flow is guided to the guide channel 141, the flow directions of the two water flows are different, the kinetic energy is further consumed in the impacting process, and meanwhile, the water quantity in a turbulent flow state can be increased, and the kinetic energy consumption in the flowing process is increased.
Rivers are at the striking in-process kinetic energy consumed, but the striking can cause flood discharge groove 14 bottom surface life's decline, for the life of extension flood discharge groove 14, on the rivers direction, the stairstepping bottom surface is established to the inclined plane, and the inclined plane can reduce impact strength, extension flood discharge groove 14's life. And each stepped bottom surface is provided with a chamfer 142, the chamfer 142 being located on the side of the stepped bottom surface perpendicular to the direction of water flow in the flood discharge trough 14. The chamfer 142 can provide an inclined plane or an arc surface, so that the scouring of water flow to the joint of the bottom surfaces of the trapezoids is reduced, and the service life of the trapezoid is prolonged.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. A bank spillway, comprising:
the first water inlet channel (11) is communicated with the river channel, and the included angle between the first water inlet channel and the water flow direction in the river channel is less than 90 degrees;
the second water inlet channel (12) is communicated with the river channel, and the included angle between the second water inlet channel and the water flow direction in the river channel is larger than the included angle between the first water inlet channel (11) and the water flow direction in the river channel and is smaller than 90 degrees;
a buffer pool (13) communicated with the first water inlet channel (11) and the second water inlet channel (12);
and the flood discharge groove (14) is communicated with the buffer pool (13) and is used for discharging water in the buffer pool (13).
2. A bank spillway according to claim 1, wherein: the included angle between the first water inlet channel (11) and the water flow direction in the river channel is 30-45 degrees;
the included angle between the second water inlet channel (12) and the water flow direction in the river channel is 60-75 degrees.
3. A bank spillway according to claim 2, wherein: a third water inlet channel (15) is arranged between the second water inlet channel (12) and the buffer pool (13);
the third water inlet channel (15) is perpendicular to the water flow direction in the river channel.
4. A bank spillway according to claim 3, wherein: an arc-shaped buffer section (16) is arranged between the second water inlet channel (12) and the third water inlet channel (15).
5. A bank spillway according to claim 1, wherein: the bottom surface of the flood discharge groove (14) is in a step shape;
the bottom surfaces of the flood discharge grooves (14) are sequentially lowered along the water flow direction.
6. A bank spillway according to claim 5, wherein: a guide channel (141) is arranged on the stepped bottom surface of the flood discharge groove (14);
the guide channels (141) are obliquely arranged, and the inclination directions of the adjacent guide channels (141) are opposite.
7. A bank spillway according to claim 5, wherein: a chamfer (142) is arranged on the stepped bottom surface of the flood discharge groove (14);
the axis of the chamfer (142) is perpendicular to the direction of water flow in the flood trough (14).
8. A bank spillway according to claim 5, wherein: the stepped bottom surface of the flood discharge groove (14) is obliquely arranged;
along the water flow direction in the flood discharge groove (14), the water outlet end of the stepped bottom surface of the flood discharge groove (14) is lower than the water inlet end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921885612.8U CN211421064U (en) | 2019-11-05 | 2019-11-05 | River bank spillway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921885612.8U CN211421064U (en) | 2019-11-05 | 2019-11-05 | River bank spillway |
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| Publication Number | Publication Date |
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| CN211421064U true CN211421064U (en) | 2020-09-04 |
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| CN201921885612.8U Active CN211421064U (en) | 2019-11-05 | 2019-11-05 | River bank spillway |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113106930A (en) * | 2021-03-15 | 2021-07-13 | 上海交通大学 | Zigzag type step dam and construction method thereof |
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2019
- 2019-11-05 CN CN201921885612.8U patent/CN211421064U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113106930A (en) * | 2021-03-15 | 2021-07-13 | 上海交通大学 | Zigzag type step dam and construction method thereof |
| CN113106930B (en) * | 2021-03-15 | 2022-04-26 | 上海交通大学 | Zigzag type step dam and construction method thereof |
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