CN203755267U - High arch dam flood discharge deep hole outlet structure - Google Patents
High arch dam flood discharge deep hole outlet structure Download PDFInfo
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- CN203755267U CN203755267U CN201420134362.5U CN201420134362U CN203755267U CN 203755267 U CN203755267 U CN 203755267U CN 201420134362 U CN201420134362 U CN 201420134362U CN 203755267 U CN203755267 U CN 203755267U
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- deep hole
- gate pier
- arch dam
- sudden expansion
- expansion section
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 13
- 238000009792 diffusion process Methods 0.000 abstract description 9
- 230000021715 photosynthesis, light harvesting Effects 0.000 abstract 1
- 230000035755 proliferation Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 230000008602 contraction Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 230000000763 evoking effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000009304 pastoral farming Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The utility model relates to the field of water resource and hydropower engineering, in particular to a high arch dam flood discharge deep hole outlet structure which is capable of effectively controlling the transverse diffusion degree after nappe effluent and capable of effectively reducing water fins stimulated by the effluent nappe. The structure comprises an arch dam, a deep hole formed in the arch dam and used for guiding draining and a gate pier arranged at the position of a deep hole outlet. A sudden expansion section is arranged at the deep hole outlet, a gate pier side wall connected with the sudden expansion section is arranged at the downstream end of the sudden expansion section, the cross section of the gate pier side wall is identical with that of the sudden expansion section, and the gate pier side wall is arranged on the gate pier. The deep hole outlet structure combines advantages of two traditional technical schemes, ingeniously overcomes the shortcomings of the traditional scheme, and can well meet the requirement of the high arch dam surface and the deep hole nappe for air collision-free flood discharge and energy dissipation.
Description
Technical field
The utility model relates to Hydraulic and Hydro-Power Engineering field, especially relates to a kind of high arch dam flood-discharge deep hole export structure.
Background technology
Table, the aerial collisionless flood-discharge energy-dissipating of deep hole overflow mode are a kind of novel flood-discharge energy-dissipating modes that can effectively reduce high arch dam body flood discharge atomization intensity, its cardinal principle is by the horizontal proliferation of restriction table hole and deep hole overflow, thereby reaching table, deep hole overflow interts in the air, there is not midair collision, to reduce the object of the flood-discharge atomizing causing because of overflow midair collision.
For the deep-hole structures of employing table, the aerial collisionless flood-discharge energy-dissipating of deep hole overflow mode, the horizontal proliferation (avoid and show hole overflow generation grazing), fluid stable (unstable water wing is few) of restriction jet flow, to outlet abutment wall wash away little, water cushion pool downstream pool energy dissipating fully (flow velocity behind Er Dao dam, cushion pool downstream is less) be the major requirement to its structural style.
High arch dam flood-discharge deep hole has been generally presses short tube structure, and acting head is higher and go out flow velocity all higher (go out flow velocity and reached 30m/s～40m/s), and current high arch dam flood-discharge deep hole export structure pattern mainly contains:
(1) outlet gate pier diffusion structure build.The architectural feature of this build is, after deep hole outlet sudden expansion, along the symmetrical diffusion of runner direction both sides gate pier downstream, arranges (just larger toward the distance between the gate pier abutment wall of both sides, downstream).The major advantage of this three-dimensional-structure is to arrange because outlet gate pier is diffusion, jet flow horizontal proliferation, and overflow laterally enters water scope to be disperseed, and water cushion pool downstream pool base plate surge is less; Deep hole overflow choose apart from less, plunge pool is more abundant.The shortcoming of this three-dimensional-structure is, overflow horizontal proliferation, horizontal spacing too small (overflow between adjacent two deep holes laterally overlaps mutually sometimes) between adjacent two deep hole overflows, provide interspersed space cannot to table hole overflow, can not meet table, the aerial collisionless requirement of deep hole overflow.
(2) outlet gate pier contraction structure build.The architectural feature of this build is, after deep hole outlet sudden expansion, along runner direction both sides gate pier downstream symmetric shrinkage, arranges (just less toward the distance between the gate pier abutment wall of both sides, downstream).The major advantage of this three-dimensional-structure is to arrange because outlet gate pier is to shrink, jet flow transverse beam is narrow, horizontal spacing between adjacent deep hole overflow is larger, leaves the interspersed space of table hole overflow for also larger, can meet table, the aerial collisionless requirement of deep hole overflow.The major defect of three-dimensional-structure is: one, because outlet gate pier is, shrink to arrange greatlyr to jet flow disturbance, the water wing evoking is more, and overflow fluidised form is unstable; Two, the flow velocity of jet flow higher (30m/s～40m/s), washes away more seriously to gate pier inwall, may cause the problem such as cavitation, cavitation corrosion of high-velocity flow; Three, after deep hole overflow transverse contraction, overflow is longitudinally chosen apart from increasing, and overflow drop point has approached cushion pool end two Dao Ba positions, overflow does not also face the end and has just gone out cushion pool, the interior energy dissipating of cushion pool is insufficient, and behind two dams, road, flow velocity is higher, may cause washing away of downstream river course.
Therefore, be applied at present table, the technical bottleneck in the aerial collisionless flood-discharge energy-dissipating of deep hole overflow is exactly: export gate pier diffusion structure build because of the horizontal spacing between adjacent deep hole too small, interspersed space is provided cannot to table hole overflow, thereby can not meets table, the aerial collisionless requirement of deep hole overflow; Outlet gate pier is shrink to be arranged greatlyr to jet flow disturbance, and the water wing evoking is more, and overflow fluidised form is unstable.Such contradiction has limited the effect of table, the aerial collisionless flood-discharge energy-dissipating of deep hole overflow technology greatly, also there is no this area engineering staff and finds the way that solves this technical problem.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of overflow of can effectively controlling and goes out the high arch dam flood-discharge deep hole export structure that horizontal proliferation degree after stream can effectively reduce again the water wing that jet flow evokes.
The utility model solves the technical scheme that its technical problem adopts: high arch dam flood-discharge deep hole export structure, comprise arch dam, be arranged in arch dam deep hole for leading current off, be arranged at the gate pier at deep hole outlet position, the outlet of described deep hole is provided with sudden expansion section, the downstream of described sudden expansion section is provided with the gate pier abutment wall joining with sudden expansion section, described gate pier abutment wall is symmetrical parallel and arranges, and the cross section between gate pier abutment wall is identical with the cross section of sudden expansion section, described gate pier abutment wall is arranged on gate pier.
Further, described sudden expansion section is arranged on gate pier.
Further, comprise that described gate pier abutment wall is arranged at the below of described support crossbeam for supporting the support crossbeam of deep hole outlet arch gate.
The beneficial effects of the utility model are: the utility model combines the advantage separately in conventional solution, by the both sides gate pier Design of Side Wall after sudden expansion section, be both indiffusion, also non-shrinking being arranged in parallel, make between gate pier abutment wall cross section identical with sudden expansion section.Such improvement has overcome the problem of the overflow horizontal proliferation in outlet gate pier diffusion structure build, allows table, deep hole overflow separately all constrain in limited water flow space, greatly reduces the interference between table, deep hole overflow; From other aspect, it is more that such improvement has also overcome the water wing that outlet gate pier contraction structure build evokes, overflow fluidised form unsettled defect.The engineering practice of the utility model based on a large amount of, combine two kinds of traditional technical schemes advantage separately, avoided cleverly again the inherent defect of traditional scheme, also be convenient in actual applications implement, be particularly useful in the middle of the high arch dam engineering of application table, the aerial collisionless flood-discharge energy-dissipating of deep hole overflow technology.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that the utility model is applied to high arch dam.
Fig. 2 is the sectional view of the utility model deep hole export structure.
In figure, be labeled as: arch dam 1, deep hole 2, gate pier 3, support crossbeam 4, sudden expansion section 5, gate pier abutment wall 51.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is further illustrated.
High arch dam flood-discharge deep hole export structure as shown in Figure 1 and Figure 2, comprise arch dam 1, be arranged in arch dam 1 deep hole 2 for leading current off, be arranged at the gate pier 3 at deep hole 2 outlet positions, the outlet of described deep hole 2 is provided with sudden expansion section 5, the downstream of described sudden expansion section 5 is provided with the gate pier abutment wall 51 joining with sudden expansion section 5, described gate pier abutment wall 51 is symmetrical parallel and arranges, and the cross section between gate pier abutment wall 51 is identical with the cross section of sudden expansion section 5, described gate pier abutment wall 51 is arranged on gate pier 3.
Described table, the aerial collisionless flood-discharge energy-dissipating of deep hole overflow mode, refer in the flood discharge process of dam, flood discharge delivery port is set to respectively be positioned to the table hole and the deep hole that is arranged at below, described table hole of dam top, thereby realizes the flood discharge technology of the release floodwatering flow of upper and lower two levels.Concrete, the overflow of the current of discharging from table hole is just from the gap process between the overflow of below deep hole current, shows gap between the overflow of hole just for the discharge of deep hole overflow, thereby makes the overflow between table, deep hole non-interference.But the flood discharge key of such technology will be controlled the current scope of overflow in flowing exactly well, occur that the water wing of dispersing and evoking current of overflow all can cause the decline of flood discharge effect.Focal point of the present utility model is exactly to solve above-mentioned contradiction.
In actual applications, current flow to sudden expansion section 5 from deep hole 2, at current, arrive after sudden expansion section 5, because the cross section between gate pier abutment wall 51 is identical with the cross section of sudden expansion section 5, at current, flowing out gate pier abutment wall 51 forms after overflow, the horizontal proliferation of current is restricted, and overflow range of scatter can be less than outlet diffusion build.That is to say, because the cross section between gate pier abutment wall 51 is identical with the cross section of sudden expansion section 5, therefore exporting diffusion build, the horizontal restrain of gate pier abutment wall 51 overflows strengthens to some extent, the horizontal proliferation of deep hole overflow is restricted, horizontal spacing between deep hole overflow of the present utility model is large compared with exporting diffusion scheme, therefore can provide larger interspersed space for table hole overflow, meet table, the aerial collisionless requirement of deep hole overflow.Say from another point of view, it is small that the disturbance being subject to due to deep hole overflow exports gate pier contraction structure, and the water wing evoking is also less, and overflow fluidised form exports that to shrink build stable.
When practice of construction, in order to allow the setting of sudden expansion section 5 be more convenient for constructing, can be by described sudden expansion section 5 settings and gate pier 3.In addition, for comprising that described gate pier abutment wall 51 is arranged at the below of described support crossbeam 4 for supporting the support crossbeam 4 of deep hole 2 outlet arch gates.
To sum up, the practice of the utility model based on long-term, organically combine two traditional schemes, not only fully combine the advantage of traditional two schemes, also avoided cleverly the defect of traditional scheme, can adapt to preferably the requirement of high arch dam table, the aerial collisionless flood-discharge energy-dissipating of deep hole overflow mode simultaneously.
Claims (3)
1. high arch dam flood-discharge deep hole export structure, comprise arch dam (1), be arranged in arch dam (1) for leading the deep hole (2) of current off, be arranged at the gate pier (3) at deep hole (2) outlet position, it is characterized in that: the outlet of described deep hole (2) is provided with sudden expansion section (5), the downstream of described sudden expansion section (5) is provided with the gate pier abutment wall (51) joining with sudden expansion section (5), described gate pier abutment wall (51) is symmetrical parallel and arranges, and the cross section between gate pier abutment wall (51) is identical with the cross section of sudden expansion section (5), described gate pier abutment wall (51) is arranged on gate pier (3).
2. high arch dam flood-discharge deep hole export structure as claimed in claim 1, is characterized in that: described sudden expansion section (5) is arranged on gate pier (3).
3. high arch dam flood-discharge deep hole export structure as claimed in claim 1 or 2, is characterized in that: comprise that described gate pier abutment wall (51) is arranged at the below of described support crossbeam (4) for supporting the support crossbeam (4) of deep hole (2) outlet arch gate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420134362.5U CN203755267U (en) | 2014-03-24 | 2014-03-24 | High arch dam flood discharge deep hole outlet structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420134362.5U CN203755267U (en) | 2014-03-24 | 2014-03-24 | High arch dam flood discharge deep hole outlet structure |
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| Publication Number | Publication Date |
|---|---|
| CN203755267U true CN203755267U (en) | 2014-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420134362.5U Expired - Lifetime CN203755267U (en) | 2014-03-24 | 2014-03-24 | High arch dam flood discharge deep hole outlet structure |
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| CN (1) | CN203755267U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849135A (en) * | 2015-05-26 | 2015-08-19 | 中国电建集团中南勘测设计研究院有限公司 | Testing device for measuring hydrodynamic gap pressure of bottom plates of plunge pool |
| CN106836154A (en) * | 2017-04-05 | 2017-06-13 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of new build deep hole with reduction outlet stream horizontal proliferation function |
| CN110878581A (en) * | 2019-12-24 | 2020-03-13 | 湖北省水利水电规划勘测设计院 | Extension type drain hole capable of reducing lateral diffusion of water flow |
-
2014
- 2014-03-24 CN CN201420134362.5U patent/CN203755267U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849135A (en) * | 2015-05-26 | 2015-08-19 | 中国电建集团中南勘测设计研究院有限公司 | Testing device for measuring hydrodynamic gap pressure of bottom plates of plunge pool |
| CN106836154A (en) * | 2017-04-05 | 2017-06-13 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of new build deep hole with reduction outlet stream horizontal proliferation function |
| CN106836154B (en) * | 2017-04-05 | 2023-10-03 | 水利部交通运输部国家能源局南京水利科学研究院 | Novel deep hole with function of reducing outlet water flow lateral diffusion |
| CN110878581A (en) * | 2019-12-24 | 2020-03-13 | 湖北省水利水电规划勘测设计院 | Extension type drain hole capable of reducing lateral diffusion of water flow |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHINA POWER GROUP CHENGDU INVESTIGATION DESIGN + R Free format text: FORMER NAME: CHENGDU HYDROELECTRIC INVESTIGATION + DESIGN INSTITUTE OF SPC |
|
| CP01 | Change in the name or title of a patent holder |
Address after: The North Qingyang District of Chengdu City, Sichuan Province, No. 610072 Patentee after: POWERCHINA Chengdu Engineering Co.,Ltd. Address before: The North Qingyang District of Chengdu City, Sichuan Province, No. 610072 Patentee before: HYDROCHINA CHENGDU ENGINEERING Corp. |
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| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140806 |