CN103290804A - Method and structure for providing downstream ecological flow after gate locking of stream guidance water release structure - Google Patents
Method and structure for providing downstream ecological flow after gate locking of stream guidance water release structure Download PDFInfo
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- CN103290804A CN103290804A CN2013102208226A CN201310220822A CN103290804A CN 103290804 A CN103290804 A CN 103290804A CN 2013102208226 A CN2013102208226 A CN 2013102208226A CN 201310220822 A CN201310220822 A CN 201310220822A CN 103290804 A CN103290804 A CN 103290804A
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Abstract
The invention discloses a method for providing downstream ecological flow after gate locking of a stream guidance water release structure. The method is characterized in that before a gate of the stream guidance water release structure (1) is locked, water is stored in a foundation pit between a water retaining structure (2) and a downstream water retaining cofferdam (4), and at least one water passing notch (5) is formed in the top of the downstream water retaining cofferdam (4); after the gate of the stream guidance water release structure (1) is locked, the water passing notch (5) provides the ecological flow for the down stream. The invention further discloses a drainage structure based on the method. By means of the technical scheme, the method and the structure are small in technical risk, simple, easy to implement, convenient to use and practical, sufficiently use layout characteristics of hydraulic structures, are low in cost, can have good effects, cannot leave permanent defects for the hydraulic structures and are worth of being popularized.
Description
Technical field
The present invention relates to a kind of hydraulic structure water conservancy diversion sluicing technical scheme, particularly be used for providing method and the structure of downstream ecology flow under a kind of water conservancy diversion outlet structure escape works behind the lock.
Background technology
At present, according to National Environmental evaluation and water and soil conservation requirement, Hydraulic and Hydro-Power Engineering must guarantee downstream water supply during the lock retaining down.Hydroelectric project can be ground the design stage and generally be taked at water conservancy diversion outlet structure escape works import steel gate hole and electric butterfly valve to be set, or opens by import steel gate is local, and the regulating gate aperture is to reach the purpose of downstream ecology flow.In view of electric butterfly valve does not have the engineering experience of success, plate steel gate is opened under moving water condition and is made gate produce vibration easily, and technical risk is big, and therefore above technical scheme all is difficult to satisfy the downstream ecology traffic requirement.
Summary of the invention
The objective of the invention is to for overcoming the deficiencies in the prior art, provide a kind of for method and structure that the downstream ecology flow is provided behind the lock under the water conservancy diversion outlet structure escape works, make down and need not local starting gate during the lock retaining and just can keep downstream water supply, and this technical scheme has taken full advantage of the layout feature of hydraulic structure, not only implement convenient and easy, and science, reliable.
For realizing purpose of the present invention, the method of downstream ecology flow is provided behind the lock under a kind of water conservancy diversion outlet structure escape works of the present invention, wherein under the water conservancy diversion outlet structure escape works before the lock, foundation ditch retaining between water retaining structure and downstream water-retaining cofferdam, and at the top of downstream water-retaining cofferdam at least one is set and crosses the water breach; Behind lock under the water conservancy diversion outlet structure escape works, cross the water breach by this ecological flow is provided downstream.
The present invention also provides a kind of earial drainage structure that forms by aforesaid method, comprise water conservancy diversion outlet structure escape works, permanent water retaining structure, permanent outlet structure escape works and downstream water-retaining cofferdam, between permanent water retaining structure and downstream water-retaining cofferdam, be provided with foundation ditch, be provided with at least one at the top of downstream water-retaining cofferdam and cross the water breach.
Further, also being provided with at water-retaining cofferdam top, described downstream can be to the pumping equipment of the bath of the foundation ditch between described permanent water retaining structure and the downstream water-retaining cofferdam.
Further, described water breach excessively is the trapezoidal cross-section structure.
Owing to adopted technical scheme of the present invention, before lock under the water conservancy diversion outlet structure escape works, utilized pumping equipment to wash by water to the foundation ditch between permanent water retaining structure and the downstream water-retaining cofferdam.Behind lock under the water conservancy diversion outlet structure escape works, the drainage gallery that is from upstream to the downstream is blocked by gate, when needs supply water downstream, do not need again lift gate to discharge water, and only need utilize excavating equipment in the water-retaining cofferdam of downstream, to excavate the water breach, and providing the downstream ecology flow by crossing the water breach, the width of crossing the water breach can determine according to downstream ecology flow size, so just can control and pass through water breach output downstream, realize the adjusting of the water yield.Owing to avoided the startup repeatedly of gate to close, can reduce gate running cost, improve gate application life, guarantee the security and stability of engineering during building simultaneously.Retain water to permanent outlet structure escape works elevation when permanent water retaining structure, changing by permanent outlet structure escape works provides the downstream ecology flow.The technical solution of the present invention technical risk is little, and is simple, convenient and practical, taken full advantage of the hydraulic structure layout feature, with low cost, can play good effect, nor can self leave over down permanent defective to hydraulic structure, is worthy to be popularized.
Description of drawings
Fig. 1 is layout schematic diagram of the present invention;
Fig. 2 adopts pumping equipment to the foundation ditch schematic diagram of washing by water;
Fig. 3 is structural profile arrangement diagram of the present invention;
Fig. 4 was water breach floor map;
Fig. 5 was the construction schematic diagram of water breach.
Being labeled as in the accompanying drawing: 1-water conservancy diversion outlet structure escape works, the permanent outlet structure escape works of 2-, the permanent outlet structure escape works of 3-, 4-downstream water-retaining cofferdam, 5-crosses the water breach, 6-pumping equipment, 7-excavating equipment.
The specific embodiment
The present invention is further detailed explanation below in conjunction with drawings and Examples.
See Fig. 1, Fig. 2 earlier, Fig. 1 has showed layout of the present invention, Fig. 2 has showed section arrangement of the present invention, as can be seen from the figure, technical scheme of the present invention mainly is before 1 time lock of water conservancy diversion outlet structure escape works, utilizes pumping equipment 6 to wash by water to the foundation ditch between permanent water retaining structure 2 and the downstream water-retaining cofferdam 4.Fig. 3 has showed be provided with water breach 5 in downstream water-retaining cofferdam 4, crosses water breach 5 overcurrent elevations along with the time of letting out ecological flow down constantly descends, to guarantee the uniformity of downstream ecology flow.
Fig. 4 Fig. 5 has showed structural configuration and the construction schematic diagram of crossing water breach 5, crossing water breach 5 can not be too wide in order to avoid excavating equipment can't excavate construction, simultaneously, crossing water breach 5 can not be too narrow, in order to avoid the overcurrent flow velocity causes downstream water-retaining cofferdam 4 by erosion damage too greatly.
As can be seen from Figure 1, permanent outlet structure escape works 3 be arranged within the permanent water retaining structure 2 or outside, when permanent water retaining structure 2 be Rigid Dam, then forever outlet structure escape works 3 were generally sand washing bottom outlet, flood discharge mesopore, diversion tunnel or weir meter hole etc.; And permanent water retaining structure 2 is when be flexible dam, and then forever outlet structure escape works 3 are generally flood discharging tunnel, emptying tunnel, diversion tunnel or flood spillway etc.
During the invention process, behind 1 time lock of water conservancy diversion outlet structure escape works, upstream diversion passage is downstream intercepted, and adopts excavating equipment 7 to excavate at downstream water-retaining cofferdam 4 and forms water breach 5, when needs are supplied a certain amount of water downstream, adopt excavating equipment 7 constantly will cross water breach elevation and reduce.When permanent water retaining structure 2 was retained water to permanent outlet structure escape works 3 elevations, changing by permanent outlet structure escape works 3 earial drainages provided the downstream ecology flow.
More than be a concrete exemplary applications of the present invention, the present invention also has other embodiment, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop within the protection domain of the presently claimed invention.
Claims (4)
1. the method for downstream ecology flow is provided behind the lock under the water conservancy diversion outlet structure escape works, it is characterized in that: before the following lock of water conservancy diversion outlet structure escape works (1), foundation ditch retaining between water retaining structure (2) and downstream water-retaining cofferdam (4), and at the top of downstream water-retaining cofferdam (4) at least one is set and crosses water breach (5); Behind lock under the water conservancy diversion outlet structure escape works, cross water breach (5) by this ecological flow is provided downstream.
2. the earial drainage structure that forms of the method for claim 1, comprise water conservancy diversion outlet structure escape works (1), permanent water retaining structure (2), permanent outlet structure escape works (3) and downstream water-retaining cofferdam (4), between permanent water retaining structure (2) and downstream water-retaining cofferdam (4), be provided with foundation ditch, it is characterized in that: be provided with at least one at the top of downstream water-retaining cofferdam (4) and cross water breach (5).
3. earial drainage structure according to claim 2 is characterized in that: also being provided with at described downstream water-retaining cofferdam (4) top can be to the pumping equipment (6) of the bath of the foundation ditch between described permanent water retaining structure (2) and the downstream water-retaining cofferdam (4).
4. earial drainage structure according to claim 3 is characterized in that: the described water breach (5) of crossing is the trapezoidal cross-section structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310220822.6A CN103290804B (en) | 2013-06-05 | 2013-06-05 | Method and the structure of downstream ecology flow are provided after lock under water conservancy diversion outlet structure escape works |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310220822.6A CN103290804B (en) | 2013-06-05 | 2013-06-05 | Method and the structure of downstream ecology flow are provided after lock under water conservancy diversion outlet structure escape works |
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| CN103290804A true CN103290804A (en) | 2013-09-11 |
| CN103290804B CN103290804B (en) | 2016-01-20 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104120685A (en) * | 2014-07-16 | 2014-10-29 | 中国电建集团西北勘测设计研究院有限公司 | Foundation pit self-flow type water filling and draining method |
| 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 for lower reach of water resources and hydropower engineering |
| CN107386220A (en) * | 2017-09-07 | 2017-11-24 | 中国电建集团成都勘测设计研究院有限公司 | The dam structure of breach shunting two |
| CN111809638A (en) * | 2020-07-03 | 2020-10-23 | 湖北省水利水电规划勘测设计院 | Blasting weir-breaking flood-discharging method |
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| EP0509422B1 (en) * | 1991-04-13 | 1995-11-29 | APA ABWASSERTECHNIK GmbH | Apparatus for controlling the overflow and water level of hydraulic installations |
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| EP0509422B1 (en) * | 1991-04-13 | 1995-11-29 | APA ABWASSERTECHNIK GmbH | Apparatus for controlling the overflow and water level of hydraulic installations |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104120685A (en) * | 2014-07-16 | 2014-10-29 | 中国电建集团西北勘测设计研究院有限公司 | Foundation pit self-flow type water filling and draining method |
| CN104120685B (en) * | 2014-07-16 | 2016-04-20 | 中国电建集团西北勘测设计研究院有限公司 | A kind of foundation ditch gravity flow fills water discharge method |
| 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 for lower reach of water resources and hydropower engineering |
| CN107386220A (en) * | 2017-09-07 | 2017-11-24 | 中国电建集团成都勘测设计研究院有限公司 | The dam structure of breach shunting two |
| CN111809638A (en) * | 2020-07-03 | 2020-10-23 | 湖北省水利水电规划勘测设计院 | Blasting weir-breaking flood-discharging method |
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| Publication number | Publication date |
|---|---|
| CN103290804B (en) | 2016-01-20 |
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