EP2182120A1 - Überlaufstaudamm und Verfahren um die Wasserstandshöhe an einer Seite der Anlage zu erhalten - Google Patents

Überlaufstaudamm und Verfahren um die Wasserstandshöhe an einer Seite der Anlage zu erhalten Download PDF

Info

Publication number
EP2182120A1
EP2182120A1 EP09174474A EP09174474A EP2182120A1 EP 2182120 A1 EP2182120 A1 EP 2182120A1 EP 09174474 A EP09174474 A EP 09174474A EP 09174474 A EP09174474 A EP 09174474A EP 2182120 A1 EP2182120 A1 EP 2182120A1
Authority
EP
European Patent Office
Prior art keywords
dam
water level
overflow
water
flow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09174474A
Other languages
English (en)
French (fr)
Inventor
Remko Brouwer
Sander Christiaan Hendrik Nijhof
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ingenieursbureau Oranjewoud BV
Original Assignee
Ingenieursbureau Oranjewoud BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ingenieursbureau Oranjewoud BV filed Critical Ingenieursbureau Oranjewoud BV
Publication of EP2182120A1 publication Critical patent/EP2182120A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
    • E02B7/20—Movable barrages; Lock or dry-dock gates
    • E02B7/40—Swinging or turning gates
    • E02B7/44—Hinged-leaf gates
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
    • E02B7/16—Fixed weirs; Superstructures or flash-boards therefor
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
    • E02B8/06—Spillways; Devices for dissipation of energy, e.g. for reducing eddies also for lock or dry-dock gates

Definitions

  • the invention relates to an overflow dam for maintaining a first water level at a first side of the dam, said first water level being higher than the second water level at the second side of the dam, wherein water from the first side of the dam may flow over the dam to the second side of the dam.
  • an overflow dam is to be understood as any contracted waterway, such as a weir, a lock, a sluice or an abutment for a bridge over a river.
  • a sill in a hole of a dike burst is likewise to be understood as an overflow dam.
  • An overflow dam is generally known.
  • a disadvantage of the known dams is that the water flow pattern downstream from the dam is such that people or animals being in the direct hydraulic sphere of influence of the dam have a high risk of getting drown.
  • an overflow dam of the kind referred to in the introduction is characterized in that said dam comprises an element extending at the second side of the dam, said element having an upper surface which is at substantially, or approximately, the same height as said second water level, such, that said water flowing over said dam lands on said element.
  • said dam comprises attaching means for attaching said element to said second side of the overflow dam.
  • Said attaching means have the advantage that the element will remain at the dam in a fixed position with respect to the stream direction.
  • said dam is a hingeable dam
  • said attaching means comprise a hinge for hingeably attaching said element to said second side of the dam, such, that said element is hingeable around the longitudinal axis of said dam.
  • a hingeable dam is movable between a vertical position and a more horizontal position and because of the hingeable attachment of said element to said dam, said element will remain in a more or less horizontal position for every position of the dam, such, that the element affects the flow pattern most effectively.
  • said attaching means comprise guiding means for guidingly attaching said element to said second side of the dam, such, that said element is movable in a vertical direction for adapting to said second water level.
  • said element has a buoyancy, such, that in accordance with the pressure of said water flowing over said dam and landing onto said element and in accordance with said second water level, said upper surface of said element is maintained at approximately the same height as said second water level.
  • sealing means are provided between said element and said second side of said dam.
  • the sealing means seal a free space between the element and the dam, such, that limbs or the like of people or animals that are in the proximity of the dam, cannot get stuck between the dam and the element.
  • said slab prevents water from flowing through the element and the dam, thereby further reducing the hydraulic jump at the downstream side of the element.
  • said sealing means comprise a neoprene slab.
  • said element is shaped as a plate.
  • An element in the form of a plate has the advantage that is light compared to the size of its upper surface, such that the element will easily adapt to the height of the second water level.
  • the invention also relates to a method for maintaining a first water level at a first side of an overflow dam, said first water level being higher than a second water level at the second side of the dam, wherein water from the first side of the dam flows over the dam to the second side of the dam.
  • FIG 1 an overflow dam 1 according to the prior art is shown.
  • a first water level 2 is maintained, which first water level 2 is higher than a second water level 3 at the downstream side of the dam 1.
  • Downstream flowing water flows over the dam 1 to the downstream side of the dam 1 in a vertical direction, as is shown by flow lines 4.
  • the water hits the bottom 5 of the basin or the river bed, the water is deflected horizontally along the bottom 5 until the water is deflected upwards by the stagnant water 6. This upward deflection is stronger when a stream breaker 7 is used.
  • the water splits and flows both upstream 8 and downstream 9 of the stagnant water 6. As is shown by flow lines 4, this creates a circulating flow of water at the upstream side 8 of the stagnant water 6, which flow pattern is called a submerged hydraulic jump. A person or an animal ending up in this circulating flow cannot easily escape and may drown.
  • an overflow dam 1 in the form of a movable weir is shown.
  • a plate 10 extends at the downstream side of the dam 1, such, that the upper surface of the plate 10 is at approximately the same height as said second water level 3.
  • the water flowing over the dam 1 lands on the plate 10 and is deflected in the horizontal direction over the plate 10.
  • a circulating water flow is thus created at the downstream side 12 of the plate 10, which circulating flow is weaker than the circulating flow occurring at the dam of figure 1 .
  • This flow pattern is a normal hydraulic jump of a harmless kind, and any person or animal ending up there can easily or even automatically escape from the hydraulic jump to the water that is flowing away further upstream 13.
  • the plate 10 is preferably dimensioned such that substantially all the water flowing over the dam 1 will land on the plate 10.
  • plate 10 is hingeably connected to dam 1 by means of a hinge 14.
  • the dam 1 has the form of a hingeable weir, which is attached at the bottom of the weir by a hinge, and which is movable between a vertical position and a more horizontal position, because the plate will then remain in a substantially horizontal position even when the dam 1 is moved in either direction towards or from the bottom 5.
  • an overflow dam 1 is shown with a plateau 15 extending at the downstream side of the dam 1.
  • the upper surface of the plateau 15 is at approximately the same height as said second water level 3.
  • the water will flow in substantially the same manner as described above for the dam of figure 2 , as is shown by flow lines 4.
  • Such a plateau 15 can be conveniently used for dams that have a more or less constant second water level 3 at their downstream sides.
  • multiple plateaus 15 can be used depending on the geometrical structure of the dam 1.
  • said plateau 15 is a fixed construction.
  • an overflow dam 1 in the form of a hingeable weir is shown.
  • a plate 10 extends at the downstream side of the dam 1, such, that the upper surface of the plate 10 is at approximately the same height as said second water level 3.
  • the dam 1 comprises guiding cables or guiding rods 16 that are vertically mounted at both sides of the downstream side of dam 1, such, that the guiding rods 16 are separated from each other by a horizontal distance.
  • Plate 10 is hingeably attached to the guiding rods 16 by use of hinge 14, which is advantageous because dam 1 is a hingeable weir as described before.
  • Hinge 14 can be a rubber strip.
  • Plate 10 is freely movable in a vertical direction over the guiding rods 16, so that the height of plate 10 can be adapted to said second water level 3, in accordance with both the upstream water level 2 as the downstream water level 3. This is advantageous when said second water level 3 varies in time.
  • plate 10 has a buoyancy, such, that in accordance with the pressure of said water flowing over said dam 1 and landing onto the plate 10 and in accordance with said second water level 3, said upper surface of said plate 10 is maintained at approximately the same height as said second water level 3. In this manner the plate 10 will easily and automatically adapt to the second water level 3.
  • the buoyancy of the plate 10 can be easily adapted to requirements by choosing a suitable material and/or volume.
  • the density of said plate 10 is as low as possible, so that the upper surface of plate 10 will easily remain at the second water level 3.
  • said plate 10 is made of PE, and also preferably the plate has a hollow core.
  • a neoprene slab 17 is provided between the plate 10 and the dam 1 so that the free space between the plate 10 and dam 1 is sealed, such, that limbs or the like of a person or animal that is in the proximity of the dam 1, cannot get stuck between the dam 1 and the plate 10.
  • the guiding rods 16 can be provided in this slab 17.
  • Preferred embodiments eliminate the risk of drowning at weirs.
  • Preferred embodiments relate to a device for protecting a weir such that the risk of humans and/or animals being drowned upon falling into the water within the direct hydraulic range of influence of the weir is eliminated.
  • the term 'weir' as used herein is understood to mean all contracted waterways. Examples of weirs are: a dam, a lock, an abutment for a bridge across a river. Likewise, a threshold in a hole of a dike breach can be regarded as a weir.
  • Such a device is of importance to humans and animals that are exposed to the risk of drowning upon falling into the water within the range of influence of a weir.
  • Another object of preferred embodiments is to provide such a device which meets high reliability standards, which is inexpensive to acquire, easy to install, self-adjusting and which functions fully automatically.
  • a device which influences a so-called (submerged) hydraulic jump, also known as “surface eddy” or “roller” in the literature, caused by the transition from supercritical flow to sub-critical flow, such that it eliminates the risk of drowning for humans and/or animals that have fallen into the water
  • said device comprising: a flow element which is present, possibly floating, in the flow behind (downstream of) the weir; possible floating means, which give the flow element a degree of buoyancy corresponding to the hydraulic boundary conditions of the weir; a fastening construction, which keeps the flow element correctly positioned relative to the weir and the current hydraulic flow profile; means which prevent any injuries sustained by humans or animals as a result of getting trapped or other injuries sustained as a result of coming into contact with the flow element and/or the weir.
  • a floating plate is attached to an overflow-type dam, which plate forms an additional “step” as it were.
  • Said additional “step” is positioned approximately at the level of the downstream water level.
  • the water that flows over the dam first lands on said "step”, resulting in a supercritical flow in horizontal direction.
  • Said supercritical flow flows from the "step”, resulting in a hydraulic jump (surface eddy) of a harmless kind.
  • a device automatically adjusts itself to the varying water levels, both upstream and downstream, within the design criteria that need to be defined for each individual version.
  • a device according to the embodiment can be adapted to any weir dam by using the correct dimensions.
  • a device according to the embodiment can be used both on adjustable dam and on fixed dams.
  • a device is to that end provided with a fastening construction which fixes the flow element relative to the dam in the direction of flow but which provides the necessary freedom of movement in the other directions so as to enable the element to adjust itself automatically to the prevailing conditions.
  • the fastening construction is to that end built up of, for example, at least two guide cables or guide rods, which are fixed to the dam on either side thereof and over which one guide for each guide cable or guide rod, which guide forms part of the flow element, can freely move upwards or downwards.
  • a device can be adapted as regards the required buoyancy through a suitable selection of the materials and the volume of the element.
  • the buoyancy must correspond to the pressure of the falling water.
  • a device is provided with, for example, a neoprene slab between the flow element and the dam gate, which closes off the free space in such a manner that limbs or other body parts cannot get trapped between the flow element and the dam gate.
  • the guide bushes of the fastening construction can be incorporated in said slab.
  • the flow element consists of a fixed construction in the form of a platform.
  • the water level downstream of the dam must not vary too much.
  • one or more platforms may be used, depending on the geometric configuration of the dam.
  • Figure 1 is a longitudinal sectional view, which schematically shows the flow pattern behind a weir. This schematic view shows how a water layer flowing back can hold objects floating on the surface, including humans and animals, and shows the risk of drowning. The figure shows the submerged hydraulic jump and the outflow.
  • Figure 2 is a longitudinal sectional view, which shows the flow pattern behind a weir in which a flow element is present. As the figure shows, a surface eddy (hydraulic jump) of a harmless kind is formed. In the figure a supercritical flow over the flow element, the submerged hydraulic jump, and the outflow are shown.
  • a surface eddy hydroaulic jump
  • Figure 3 is a longitudinal sectional view, which shows the flow pattern behind a weir in which a fixed platform is installed. The figure also shows how a surface eddy of a harmless kind is formed. In the figure a supercritical flow over the flow element, the submerged hydraulic jump, and the outflow are shown.
  • Figure 4 is a top plan view of an embodiment in which the flow element is configured as a floating plate attached to the weir (in this case an adjustable dam) by means of two rods and a hinge mechanism.
  • the (existing) adjustable dam the rod for guiding the plate in vertical direction, the rubber fastening strip, and the flow element are shown.
  • Figure 5 is a longitudinal sectional view A-A of the embodiment shown in figure 4 .
  • the rod for guiding the plate in vertical direction, the rubber fastening strip, and the flow element are shown.
  • Preferred embodiments relate to a weir as known from the literature, and are characterised by a device which influences a so-called (submerged) hydraulic jump caused by the transition from supercritical flow to sub-critical flow, such that it eliminates the risk of drowning for humans and/or animals who have fallen into the water, said device comprising: a flow element which is present, possibly floating, in the flow behind (downstream of) the weir; possible floating means, which give the flow element a degree of buoyancy corresponding to the hydraulic boundary conditions of the weir; a fastening construction, which keeps the flow element correctly positioned relative to the weir and the current hydraulic flow profile; means which prevent any injuries sustained by humans or animals as a result of getting trapped or other injuries sustained as a result of coming into contact with the flow element and/or the weir.
  • the flow element forms an additional "step", as it were, which is disposed approximately at the level of the downstream water level, wherein the falling water that flows over the weir first is deflected in horizontal direction, such that said supercritical flow causes a harmless hydraulic jump.
  • the device is characterised by a flow element which automatically adjusts itself to the varying water levels, both upstream and downstream, within the design criteria.
  • the device is characterised in that the flow element can be adapted to any weir as regards its dimensions.
  • the device is characterised in that the device can be used with fixed dams as well as with adjustable dams, both of the overflow type.
  • the device is characterised in that there is no risk of humans and/or animals getting trapped or sustaining other injuries upon coming into contact with the flow element.
  • the device is characterised in that the flow profile consists of one or more platforms behind the weir.
  • the plate and/or the plateau can be adapted to overflow dams of different size by changing the size of the plate and/or the plateau. Also, it is clear that the plate and/or the plateau are applicable to both adjustable and fixed weirs.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Sewage (AREA)
  • Barrages (AREA)
EP09174474A 2008-10-31 2009-10-29 Überlaufstaudamm und Verfahren um die Wasserstandshöhe an einer Seite der Anlage zu erhalten Withdrawn EP2182120A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1036143A NL1036143C (nl) 2008-10-31 2008-10-31 Inrichting ter voorkoming van verdrinkingsgevaar bij overlaten.

Publications (1)

Publication Number Publication Date
EP2182120A1 true EP2182120A1 (de) 2010-05-05

Family

ID=40792749

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09174474A Withdrawn EP2182120A1 (de) 2008-10-31 2009-10-29 Überlaufstaudamm und Verfahren um die Wasserstandshöhe an einer Seite der Anlage zu erhalten

Country Status (2)

Country Link
EP (1) EP2182120A1 (de)
NL (1) NL1036143C (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104294801A (zh) * 2014-09-11 2015-01-21 四川大学 悬挂跌流式水垫塘消能系统
CN111809580A (zh) * 2020-07-31 2020-10-23 中国电建集团贵阳勘测设计研究院有限公司 一种泄洪洞闸门后掺气防空蚀结构
CN113047241A (zh) * 2021-03-23 2021-06-29 河海大学 一种具有预掺气结构的阶梯溢洪道及施工方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111691378B (zh) * 2020-07-02 2021-11-05 中国电建集团贵阳勘测设计研究院有限公司 一种减少径流式电站泄洪工作闸门频繁开启的方法及结构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB174329A (en) * 1921-12-15 1923-03-15 Techn Projectierungs U Baubuer Improved installation for weirs and the like
US1764047A (en) * 1927-03-07 1930-06-17 Lutz Alois Viktor Device for preventing the formation of gullies
JPS57155411A (en) * 1981-03-19 1982-09-25 Sumitomo Electric Ind Ltd Method for reducing energy of flowing water
JPS5817909A (ja) * 1981-07-24 1983-02-02 Mitsubishi Heavy Ind Ltd 水門扉からの落下水音低減装置
WO1999057377A1 (en) * 1998-05-05 1999-11-11 Kauppi Frederick J Hydraulic energy dissipating offset stepped spillway

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB174329A (en) * 1921-12-15 1923-03-15 Techn Projectierungs U Baubuer Improved installation for weirs and the like
US1764047A (en) * 1927-03-07 1930-06-17 Lutz Alois Viktor Device for preventing the formation of gullies
JPS57155411A (en) * 1981-03-19 1982-09-25 Sumitomo Electric Ind Ltd Method for reducing energy of flowing water
JPS5817909A (ja) * 1981-07-24 1983-02-02 Mitsubishi Heavy Ind Ltd 水門扉からの落下水音低減装置
WO1999057377A1 (en) * 1998-05-05 1999-11-11 Kauppi Frederick J Hydraulic energy dissipating offset stepped spillway

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104294801A (zh) * 2014-09-11 2015-01-21 四川大学 悬挂跌流式水垫塘消能系统
CN111809580A (zh) * 2020-07-31 2020-10-23 中国电建集团贵阳勘测设计研究院有限公司 一种泄洪洞闸门后掺气防空蚀结构
CN113047241A (zh) * 2021-03-23 2021-06-29 河海大学 一种具有预掺气结构的阶梯溢洪道及施工方法

Also Published As

Publication number Publication date
NL1036143C (nl) 2010-05-04

Similar Documents

Publication Publication Date Title
US4377352A (en) Self-actuating water containment barrier
EP2182120A1 (de) Überlaufstaudamm und Verfahren um die Wasserstandshöhe an einer Seite der Anlage zu erhalten
KR100912949B1 (ko) 수위에 따른 각도조절식 난간장치
US6588370B1 (en) Labyrinth weir and pool fishway
JP6072570B2 (ja) 透過型砂防堰堤
CN112900350A (zh) 潜伏式抑咸活动拍门结构
KR100487997B1 (ko) 생태복원형 수문식 자동보 시스템
KR20170104773A (ko) 교각기둥 보호장치
JP2015214873A (ja) 非常用防護装置
KR101302203B1 (ko) 하천의 수위조절이 가능한 친환경 가동식 수문장치
CA1293385C (en) Apparatus and method for quieting flowing waters
KR20170062658A (ko) 도르래를 이용한 홍수 방지장치
CN109837863A (zh) 一种河道防冲促淤装置及其安装方法
WO2004018787A1 (en) Apparatus for flood protection of manholes and access covers
GB2450875A (en) Flood prevention barrier incorporating a float member
WO2013024610A1 (ja) 避難用フロート
KR100530275B1 (ko) 교각의 세굴을 방지하기 위한 슬라이드 세굴방지대
KR200316360Y1 (ko) 생태계 보호를 위한 하천의 수중보 구조물
RU2808178C1 (ru) Устройство для мобильной защиты от паводков
KR200288844Y1 (ko) 수문의 충격방지장치
KR20190100805A (ko) 퇴적물의 통과 수로로 겸용되는 어도를 가춘 낙차공
KR102577773B1 (ko) 부력식 어도
KR102004364B1 (ko) 외측의 수위변화에 따라 개폐시점이 변하는 모멘트 자동수문을 이용한 해안가 수중어도
KR200364488Y1 (ko) 하천의 방류량 조절기구를 갖춘 제방축조물
CN110678608A (zh) 防洪装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

AX Request for extension of the european patent

Extension state: AL BA RS

17P Request for examination filed

Effective date: 20101021

17Q First examination report despatched

Effective date: 20101126

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20161124

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20160316