CN205100175U - Structure for providing ecological flow of downstream river reach of hydraulic and hydroelectric engineering - Google Patents
Structure for providing ecological flow of downstream river reach of hydraulic and hydroelectric engineering Download PDFInfo
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- CN205100175U CN205100175U CN201520811098.9U CN201520811098U CN205100175U CN 205100175 U CN205100175 U CN 205100175U CN 201520811098 U CN201520811098 U CN 201520811098U CN 205100175 U CN205100175 U CN 205100175U
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- Prior art keywords
- cofferdam
- river reach
- diversion
- reaches
- diversion tunnel
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- 238000011144 upstream manufacturing Methods 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 5
- 230000007547 defect Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000018044 dehydration Effects 0.000 description 6
- 238000006297 dehydration reaction Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model discloses a structure that provides ecological flow of hydraulic and hydroelectric engineering low reaches river reach, including the engineering dam, the engineering dam divide into upper reaches river reach and low reaches river reach with the river, is provided with upper reaches cofferdam and low reaches cofferdam respectively in engineering dam upper reaches and low reaches, is equipped with the diversion tunnel between upper reaches river reach and the low reaches river reach, and the diversion entry of diversion tunnel arranges the upper reaches river reach in and places the upper reaches of upper reaches cofferdam in, and the diversion export is arranged the low reaches river reach in and is placed in the low reaches of low reaches cofferdam in, is equipped with the diversion channel between diversion tunnel and the low reaches cofferdam. The utility model can ensure the ecological flow required by the river reach between the downstream cofferdam and the diversion tunnel outlet, and avoid causing the dehydrated river reach; the structure has the advantages of small risk, simplicity, practicability, convenience, practicability and low cost, can not leave the defects of the permanent building, and is worthy of popularization.
Description
Technical field
The utility model relates to Hydraulic and Hydro-Power Engineering technical field, is specifically related to a kind of structure providing Hydraulic and Hydro-Power Engineering lower reache ecological flow.
Background technology
In recent years along with China's improving constantly Hydraulic and Hydro-Power Engineering environmental protection requirement, letting out ecological flow problem under reservoir engineering is the emphasis that environmental protection authorities pay close attention to.Rely on stage cofferdam method or Diversion Tunnel water conservancy diversion during Construction for Hydroelectric Project, dehydration section generally can not be caused to subtract dehydration.Also have a lot about Hydraulic and Hydro-Power Engineering retaining phase and run duration by the scheme of letting out ecological flow under Diversion Tunnel at present, when such as (1) buries the steel pipe that discharges water, the shutoff of (2) Diversion Tunnel gate underground below Diversion Tunnel base plate, gatage, (3) arrange hole and electric butterfly valve on water conservancy diversion outlet structure escape works steel-slag sand, or open regulating gate aperture etc. by import steel-slag sand local, the common feature of these schemes, exactly by letting out required flow under diversion tunnel, can effectively meet downstream ecology water demand.Find in engineering practice, limit by conditions such as section, engineering place landform, geology, part Hydraulic and Hydro-Power Engineering Diversion Tunnel outlet distance downstream cofferdam is far away, distance can reach hundreds of rice and even go up km, this just easily causes the section between downstream cofferdam to Diversion Tunnel outlet area to occur dehydrating phenomena, cause to this section aquatic ecological environment and have a strong impact on, but this problem is often out in the cold, must attract great attention.
Utility model content
The utility model aims to provide a kind of structure providing Hydraulic and Hydro-Power Engineering lower reache ecological flow, and between downstream cofferdam to the Diversion Tunnel may ignored to solve prior art exports, section takes off water problem, and it is convenient and easy that it has enforcement, the advantages such as science is reliable.
The utility model is achieved by following technical solution:
A kind of structure that Hydraulic and Hydro-Power Engineering lower reache ecological flow is provided, comprise engineering dam, river is divided into upper reach and lower reache by engineering dam, upstream cofferdam and downstream cofferdam is respectively arranged with at engineering dam upstream and downstream, diversion tunnel is provided with between upper reach and lower reache, the directed fluid inlet of diversion tunnel is placed in upper reach and is placed in the upstream of upstream cofferdam, diversion outlet is placed in lower reache and is placed in the downstream of downstream cofferdam, is provided with water-drawing channel between described diversion tunnel and downstream cofferdam.
The entrance elevation of described water-drawing channel is lower than the diversion tunnel Bottom Altitude at this place, and water-drawing channel entrance elevation is higher than outlet elevation.
The beneficial effects of the utility model are:
Compared with prior art, the structure of what the utility model provided provide Hydraulic and Hydro-Power Engineering lower reache ecological flow, the ecological flow needed for section between downstream cofferdam to diversion tunnel outlet can be ensured, avoid causing dehydration section, solve section between downstream cofferdam that current part engineering may ignore to diversion tunnel outlet and take off water problem; And this structure risk is little, simple, convenient and practical, with low cost, the effect arrived very much can be played, and lower defect can not be left over to permanent building self, be worthy to be popularized.
Accompanying drawing explanation
Fig. 1 is arrangement diagram of the present utility model;
In figure: 1-engineering dam, 2-upstream cofferdam, 3-downstream cofferdam, 4-directed fluid inlet, 5-diversion tunnel, 6-diversion outlet, 7-water-drawing channel, 8-upper reach, 9-lower reache.
Detailed description of the invention
Below in conjunction with accompanying drawing, the technical solution of the utility model is described further, but described in required protection domain is not limited to;
As shown in Figure 1, the structure of what the utility model provided provide Hydraulic and Hydro-Power Engineering lower reache ecological flow, comprise engineering dam 1, river is divided into upper reach 8 and lower reache 9 by engineering dam 1, upstream cofferdam 2 and downstream cofferdam 3 is respectively arranged with at engineering dam 1 upstream and downstream, diversion tunnel 5 is provided with between upper reach 8 and lower reache 9, the directed fluid inlet 4 of diversion tunnel 5 is placed in upper reach 8 and is placed in the upstream of upstream cofferdam 2, diversion outlet 6 is placed in lower reache 9 and is placed in the downstream of downstream cofferdam 3, water-drawing channel 7 is provided with between described diversion tunnel 5 and downstream cofferdam 3.
The entrance elevation of described water-drawing channel 7 is lower than diversion tunnel 5 Bottom Altitude at this place, and water-drawing channel 7 entrance elevation is higher than outlet elevation.
As shown in Figure 1, the technical solution of the utility model is mainly during construction diversion, or when still letting out ecological flow 5 times by diversion tunnel after directed fluid inlet 4 times lock retainings, by the water-drawing channel 7 built in advance, the water that diversion tunnel 5 is released is caused downstream cofferdam 3 place, flow into river course again, release to the dehydration section in lower reache 9 ecological flow, the conveyance capacity of water-drawing channel 7 should meet the minimum ecological flow requirement of dehydration required for section.The entrance location of water-drawing channel 7 should be determined by elevation computation, or be arranged in diversion outlet 6 place, or be arranged in the inner a certain position of diversion tunnel 5, but diversion tunnel 5 Bottom Altitude of the input elevation of drainage channel 7 lower than this place should be guaranteed, and make the input elevation of water-drawing channel 7 higher than outlet elevation, namely the gradient of water-drawing channel 7 is contrary with the gradient in river course.
Owing to have employed technique scheme, during construction period tunnel diversion, and after diversion tunnel 5 times lock retainings still by letting out the ecological flow needed for lower reache under Diversion Tunnel time, water-drawing channel 7 is utilized the ecological flow needed for lower reache 9 to be caused downstream cofferdam 3 place of diversion outlet 6 upstream, flow into river course again, thus ensure that the ecological flow between downstream cofferdam 3 to diversion outlet 6 needed for section, avoid causing dehydration section, solve this problem that current part engineering may be ignored.
Claims (2)
1. one kind provides the structure of Hydraulic and Hydro-Power Engineering lower reache ecological flow, comprise engineering dam (1), river is divided into upper reach (8) and lower reache (9) by engineering dam (1), upstream cofferdam (2) and downstream cofferdam (3) is respectively arranged with at engineering dam (1) upstream and downstream, diversion tunnel (5) is provided with between upper reach (8) and lower reache (9), the directed fluid inlet (4) of diversion tunnel (5) is placed in upper reach (8) and is placed in the upstream of upstream cofferdam (2), diversion outlet (6) is placed in lower reache (9) and is placed in the downstream of downstream cofferdam (3), it is characterized in that: between described diversion tunnel (5) and downstream cofferdam (3), be provided with water-drawing channel (7).
2. the structure that Hydraulic and Hydro-Power Engineering lower reache ecological flow is provided according to claim 1, it is characterized in that: the entrance elevation of described water-drawing channel (7) is lower than diversion tunnel (5) Bottom Altitude at this place, and water-drawing channel (7) entrance elevation is higher than outlet elevation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520811098.9U CN205100175U (en) | 2015-10-19 | 2015-10-19 | Structure for providing ecological flow of downstream river reach of hydraulic and hydroelectric engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520811098.9U CN205100175U (en) | 2015-10-19 | 2015-10-19 | Structure for providing ecological flow of downstream river reach of hydraulic and hydroelectric engineering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205100175U true CN205100175U (en) | 2016-03-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520811098.9U Active CN205100175U (en) | 2015-10-19 | 2015-10-19 | Structure for providing ecological flow of downstream river reach of hydraulic and hydroelectric engineering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205100175U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105200965A (en) * | 2015-10-19 | 2015-12-30 | 中国电建集团贵阳勘测设计研究院有限公司 | Structure for providing ecological flow of downstream river reach of hydraulic and hydroelectric engineering |
| CN112301962A (en) * | 2020-10-21 | 2021-02-02 | 长江勘测规划设计研究有限责任公司 | Method for improving flow capacity of large diversion project without affecting normal water supply |
-
2015
- 2015-10-19 CN CN201520811098.9U patent/CN205100175U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105200965A (en) * | 2015-10-19 | 2015-12-30 | 中国电建集团贵阳勘测设计研究院有限公司 | Structure for providing ecological flow of downstream river reach of hydraulic and hydroelectric engineering |
| CN112301962A (en) * | 2020-10-21 | 2021-02-02 | 长江勘测规划设计研究有限责任公司 | Method for improving flow capacity of large diversion project without affecting normal water supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |