CN206928256U - Overfall dam flip trajectory bucket facility - Google Patents

Overfall dam flip trajectory bucket facility Download PDF

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Publication number
CN206928256U
CN206928256U CN201720585193.0U CN201720585193U CN206928256U CN 206928256 U CN206928256 U CN 206928256U CN 201720585193 U CN201720585193 U CN 201720585193U CN 206928256 U CN206928256 U CN 206928256U
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China
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choose
dam
downstream
bank
low bank
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CN201720585193.0U
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Chinese (zh)
Inventor
蒲云娟
叶茂
吕海艳
黄武林
王川
魏鹏程
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PowerChina Chengdu Engineering Co Ltd
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PowerChina Chengdu Engineering Co Ltd
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Abstract

The utility model discloses a kind of overfall dam flip trajectory bucket facility, it is related to Hydraulic and Hydro-Power Engineering technical field, there is provided a kind of to reduce the overfall dam flip trajectory bucket facility that washes away of the current to underwater bed.Flood discharge dam flip trajectory bucket facility includes the dam body with water stream channel, the Ba Dun being connected with dam body is provided with water stream channel in upstream end, the energy-dissipating installation being connected with dam body is provided with downstream in water stream channel, the water stream channel of upstream is divided into multiple table holes by Ba Dun;What energy-dissipating installation included laterally being arranged alternately chooses the high bank of stream and chooses the low bank of stream, choose Liu Gaokan and dam pier face, choose the low bank of stream and table hole face, choose the downstream elevation for flowing high bank and choose angle and be all higher than choosing the downstream elevation for flow low bank and choose angle, choose and flow the downstream elevation of low bank and be higher than downstream river course peak level.The utility model is particularly suitable for use in the design and construction of the moderate overflow gravity dam of large discharge per unit, flood discharge head.

Description

Overfall dam flip trajectory bucket facility
Technical field
Hydraulic and Hydro-Power Engineering technical field is the utility model is related to, more particularly to it is a kind of suitable for large discharge per unit, flood discharge The overfall dam flip trajectory bucket facility of the moderate overflow gravity dam of head.
Background technology
In common engineering, the moderate overflow gravity dam of large discharge per unit, flood discharge head uses disspation through hydraudic jimp substantially, although Disspation through hydraudic jimp work is reliable, but it is present quantities is big, construction costs is high deficiency.If Dam Site area engineering geology bar The good basement rock exposure of part is obvious, basement rock lithology is good, using flip trajectory bucket, can more save quantities, reduce construction costs.
For the flip trajectory bucket of big single wide, middle head current, existing subject matter is:1st, the discharge per unit width of flood discharge Greatly, to cause downstream river course to wash away deeper;2nd, flood discharge head is moderate, causes to choose that bank outlet stream flow velocity is not high, and deflecting nappe is chosen Away from relatively near, downstream river course washes away seriously may be unfavorable to stablizing for the safety of engineering works and downstream river course bank slope.
Utility model content
The technical problems to be solved in the utility model is:It is excessive to washing away for underwater bed to provide a kind of current that can reduce Flow dam flip trajectory bucket facility.
Technical scheme for the use that solves the above problems is:Overfall dam flip trajectory bucket facility includes the dam with water stream channel Body, water stream channel is interior to be provided with the Ba Dun being connected with dam body in upstream end, is provided with water stream channel at downstream and dam body connects The water stream channel of upstream is divided into multiple table holes by the energy-dissipating installation connect, Ba Dun;What energy-dissipating installation included laterally being arranged alternately chooses Flow high bank and choose the low bank of stream, choose Liu Gaokan and dam pier face, choose the low bank of stream and table hole face, choose flow the downstream elevation of high bank with Choose angle to be all higher than choosing the downstream elevation for flowing low bank and choose angle, choose and flow the downstream elevation of low bank and be higher than downstream river course highest water Position.
It is further:Choose that to flow the angle of choosing of high bank be α, 35 ° of 40 ° of < α <;Choose that to flow the angle of choosing of low bank be β, 10 ° of < β < 15°。
It is further:Choose and flow width of the width of high bank more than Ba Dun, choose the overall width for flowing high bank and choose the low bank of stream The ratio between overall width is 0.6~1.0.
It is further:Choose that to flow the transverse cross-sectional shape of high bank be rectangle or trapezoidal.
The beneficial effects of the utility model are:What the 1st, energy-dissipating installation included laterally being arranged alternately the choose high bank of stream and to choose stream low Bank, current " can be torn ", there is larger diffusion in the vertical, make deflecting nappe enters the increase of water thickness, is advantageous to reduce current Underwater bed is washed away.
2nd, this part water body let out under each table hole middle part of overflow gravity dam is chosen away from relatively near, this part water that dam pier afterbody crosses Body is chosen away from farther out.Overflow gravity dam end at dam pier face downstream sets and chooses Liu Gaokan, and this part water body is chosen away from will Further increase, sets at the face downstream of table hole and chooses the low bank of stream, and this part water body is chosen away from reduction, then deflecting nappe is vertical Upward can is fully pulled open, and is further advantageous to reduction current and underwater bed is washed away.
3rd, the angle of choosing for choosing the high bank of stream is increased as far as possible, it is ensured that choose the water body flowed on high bank and choose height as far as possible, choose remote.It is low that stream will be chosen Choosing on the basis of water body of the angle on bank is ensured can smoothly be chosen for bank reduces as far as possible, can make deflecting nappe as far as possible in longitudinal direction On fully pull open and the base of dam of overflow gravity dam is not by water body scour.
4th, choose to flow high bank and choosing and flow the width ratio of low bank by adjustment and divide to improve the water of deflecting nappe proximally and distally Cloth, allow deflecting nappe fully to spread stretching in longitudinal direction, mitigate washing away for downstream river course.
Brief description of the drawings
Fig. 1 is overfall dam flip trajectory bucket facility side view;
Fig. 2 is overfall dam flip trajectory bucket facility top view;
In figure mark for:Dam body 1, water stream channel 2, dam pier 3, energy-dissipating installation 4, table hole 5, choose the high bank 6 of stream, choose the low bank of stream 7。
Embodiment
The utility model is further illustrated with reference to the accompanying drawings and detailed description.
In order to provide it is a kind of can reduce the overfall dam flip trajectory bucket facility that washes away of the current to underwater bed, such as Fig. 1 and Shown in Fig. 2:Overfall dam flip trajectory bucket facility includes the dam body 1 with water stream channel 2, is provided with water stream channel 2 in upstream end The dam pier 3 being connected with dam body 1, water stream channel 2 is interior to be provided with the energy-dissipating installation 4 being connected with dam body 1 at downstream, and dam pier 1 will be upper The water stream channel 2 of trip is divided into multiple table holes 5;What energy-dissipating installation 4 included laterally being arranged alternately chooses the high bank 6 of stream and chooses the low bank 7 of stream, The high bank 6 of stream and the face of dam pier 3 are chosen, chooses the low bank 7 of stream and the face of table hole 5, is chosen and flow the downstream elevation of high bank 6 and choose angle and be all higher than choosing Flow the downstream elevation of low bank 7 and choose angle, choose and flow the downstream elevation of low bank and be higher than downstream river course peak level.
What energy-dissipating installation included laterally being arranged alternately chooses the high bank 6 of stream and chooses the low bank 7 of stream, current " can be torn ", in longitudinal direction On have larger diffusion, make deflecting nappe enter water thickness increase, be advantageous to reduce current underwater bed is washed away.Overflow gravity This part water body let out under each middle part of table hole 5 in dam is chosen away from relatively closely, and this part water body that the afterbody of dam pier 3 crosses is chosen away from farther out.On dam Overflow gravity dam end at the face downstream of pier 3, which is set, chooses the high bank 6 of stream, and this part water body is chosen away from will further increase, Set at the face downstream of table hole 5 and choose the low bank 7 of stream, this part water body is chosen away from reduction, then deflecting nappe can in the vertical Fully pull open, be further advantageous to reduction current and underwater bed is washed away.
In order to further make deflecting nappe fully pull open in the vertical, the utility model, which tries one's best to increase, chooses the high bank 6 of stream Choose angle, and reduce as far as possible choose the low bank 7 of stream choose angle.Specific recommendation is as follows:Choose that to flow the angle of choosing of high bank 6 be α, 35 ° of 40 ° of < α <; Choose that to flow the angle of choosing of low bank 7 be β, 10 ° of 15 ° of < β <.The angle of choosing for choosing the high bank 6 of stream is increased as far as possible, it is ensured that choose the water flowed on high bank 6 Body is chosen height, chosen far as far as possible.Choosing on the basis of water body of the angle on bank is ensured can smoothly be chosen for the low bank 7 of stream will be chosen as far as possible to reduce, It can make that deflecting nappe fully pulls open in the vertical and the base of dam of overflow gravity dam is not by water body scour as far as possible.
Further, choose and flow width of the width of high bank 6 more than dam pier 3, choose the overall width for flowing high bank 6 and choose the low bank 7 of stream The ratio between overall width be 0.6~1.0.Chosen by adjustment flow high bank and choosing flow the width ratio of low bank improve deflecting nappe distal end with The water distribution of near-end, allow deflecting nappe fully to spread stretching in longitudinal direction, mitigate washing away for downstream river course.
Choose that to flow the transverse cross-sectional shape of high bank 6 can be rectangle or trapezoidal.
The utility model is primarily adapted for use in the design and construction of the moderate overflow gravity dam of large discharge per unit, flood discharge head In.

Claims (4)

1. overfall dam flip trajectory bucket facility, including the dam body (1) with water stream channel (2), water stream channel (2) is interior to be set in upstream end The Ba Dun (3) being connected with dam body (1) is equipped with, the energy-dissipating installation being connected with dam body (1) is provided with downstream in water stream channel (2) (4), the water stream channel (2) of upstream is divided into multiple table holes (5) by Ba Dun (3);It is characterized in that:Energy-dissipating installation (4) includes horizontal stroke Choose Liu Gaokan (6) to what is be arranged alternately and choose the low bank (7) of stream, choose Liu Gaokan (6) and Ba Dun (3) face, choose and flow low bank (7) and table Hole (5) face, chooses Liu Gaokan (6) downstream elevation and chooses angle and be all higher than choosing the downstream elevation for flow low bank (7) and choose angle, chooses The downstream elevation for flowing low bank (7) is higher than downstream river course peak level.
2. overfall dam flip trajectory bucket facility according to claim 1, it is characterised in that:The angle of choosing for choosing Liu Gaokan (6) is α, 35 ° of 40 ° of < α <;Choose that to flow the angle of choosing of low bank (7) be β, 10 ° of 15 ° of < β <.
3. overfall dam flip trajectory bucket facility according to claim 2, it is characterised in that:The width for choosing Liu Gaokan (6) is more than Ba Dun (3) width, choose Liu Gaokan (6) overall width and choose the ratio between overall width for flowing low bank (7) as 0.6~1.0.
4. overfall dam flip trajectory bucket facility according to claim 3, it is characterised in that:Choose Liu Gaokan (6) cross section shape Shape is rectangle or trapezoidal.
CN201720585193.0U 2017-05-24 2017-05-24 Overfall dam flip trajectory bucket facility Active CN206928256U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720585193.0U CN206928256U (en) 2017-05-24 2017-05-24 Overfall dam flip trajectory bucket facility

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720585193.0U CN206928256U (en) 2017-05-24 2017-05-24 Overfall dam flip trajectory bucket facility

Publications (1)

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CN206928256U true CN206928256U (en) 2018-01-26

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110172955A (en) * 2019-06-26 2019-08-27 河南省水利第一工程局 A kind of multi-angle is adjustable flip trajectory bucket device and its construction method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110172955A (en) * 2019-06-26 2019-08-27 河南省水利第一工程局 A kind of multi-angle is adjustable flip trajectory bucket device and its construction method
CN110172955B (en) * 2019-06-26 2020-12-08 河南省水利第一工程局 Construction method of multi-angle adjustable trajectory jet energy dissipation device

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