EP4116497A1 - Soulagement de barrage - Google Patents

Soulagement de barrage Download PDF

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Publication number
EP4116497A1
EP4116497A1 EP22180503.9A EP22180503A EP4116497A1 EP 4116497 A1 EP4116497 A1 EP 4116497A1 EP 22180503 A EP22180503 A EP 22180503A EP 4116497 A1 EP4116497 A1 EP 4116497A1
Authority
EP
European Patent Office
Prior art keywords
dam
wall
relief
main dam
main
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.)
Pending
Application number
EP22180503.9A
Other languages
German (de)
English (en)
Inventor
Zhengji Zhang
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.)
Individual
Original Assignee
Individual
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
Priority claimed from CH70127/21A external-priority patent/CH718431B1/de
Application filed by Individual filed Critical Individual
Publication of EP4116497A1 publication Critical patent/EP4116497A1/fr
Pending legal-status Critical Current

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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
    • E02B7/02—Fixed barrages
    • E02B7/04—Dams across valleys
    • E02B7/08—Wall dams
    • E02B7/10—Gravity dams, i.e. those in which the weight of the structure prevents overturning
    • 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
    • E02B7/02—Fixed barrages
    • 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
    • E02B7/02—Fixed barrages
    • E02B7/04—Dams across valleys
    • E02B7/08—Wall dams
    • 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
    • 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

Definitions

  • the invention relates to a method for relieving an existing or new dam wall by integrating it into a dam structure arrangement.
  • the invention further relates to a dam structure arrangement comprising a main dam and a relief wall.
  • the invention relates to a method for relieving a main dam wall of a dam structure arrangement.
  • Dam structures are also known as dams, retaining walls or dams and are often, but not only, part of the dam of a hydroelectric power station.
  • a dam can have different construction methods such as gravity dam, arch dam and pier dam. Such designs are known to those skilled in the art.
  • dam structures need to be renovated or even have to be replaced. A complete renovation often requires shutting down the power plant for months or even years. During this time it is not possible to produce electricity, which causes large operating losses. The emptying of the reservoirs and the resulting lack of capacity for water can cause further problems in water management in the area.
  • a new dam is built downstream as a replacement dam, with the old dam being flooded after the new dam is completed.
  • Other techniques for rehabilitating or constructing new dam structures are known to those skilled in the art.
  • the object of the invention is to provide a method for relieving existing dam structures or new dam structures, which belongs to the technical field mentioned at the outset, and which can be carried out particularly cost-effectively.
  • the method makes it possible to discharge the reservoir without emptying it.
  • a discharge wall is built downstream of the main dam, which has a lower height than the main dam, wherein a discharge lake is formed between the main dam and the discharge wall such that resulting hydrostatic pressure forces on the main dam are reduced.
  • a relieving wall is built downstream of the main dam, which is lower in height than the main dam.
  • a relief lake is then formed between the relief wall and the main dam.
  • the invention further relates to a dam structure comprising a main dam wall, the dam structure comprising a spillway wall downstream of the main dam wall having a lower height than the main dam wall has, wherein between the main dam and the relief wall a relief lake is formed such that resulting hydrostatic pressure forces are reduced to the main dam.
  • the relief lake is preferably designed in such a way that the level of the water in the relief lake is within a height between the low point of the main dam wall on the reservoir side and the level of the water in the reservoir. While the water in the reservoir exerts a pressure against the main dam, this pressure is at least partially compensated by a counter-pressure in the discharge lake, so that the main dam is subjected to a lower resultant pressure. This relieves the pressure on the main dam wall. Instead of refurbishment, a main dam wall in need of refurbishment can be relieved by this structural measure. Depending on the configuration of the main dam, a reinforcement of the main dam can also be achieved. If it is a gravity dam whose cross-section decreases towards the top, a weight force can act on the main dam with the discharge lake, which strengthens the main dam or presses it downwards.
  • the effects of the relief wall and the relief lake can be calculated as follows: A constant width B from bottom to top is assumed for both walls for a quantitative assessment of the relief of the main dam wall. The static pressures in each of the upper reservoir and lower relief lake increase linearly with the depth of the water.
  • the relief lake has a free surface. This achieves a particularly simple design, with which the manufacturing process in particular can be kept cost-effective.
  • the relief lake can also be closed - but care must be taken that no force-transmitting connection is formed between the relief wall and the main dam. These should be force-technically independent.
  • the height of the relief wall is preferably between 30% and 95% of the height of the main dam, in particular between 35% and 60%. In variants, the height can also be less than 30%.
  • a height of the relief wall is particularly preferably between 30% and 95% of the height of the main dam, measured from a lowest point in the terrain of the main dam, in particular from a lowest point in the terrain on the reservoir side of the main dam. In variants, the height can also be less than 30%.
  • the crown of the relief wall is preferably at least 5% of the height of the main dam below the crown of the main dam.
  • the above method is preferably used to relieve an existing main dam wall instead of renovating it. This can relieve an older, overloaded main dam wall, thus significantly increasing its service life. Depending on the condition of the main dam wall in need of rehabilitation, the main dam wall can only be partially renovated, whereby the main dam wall can also be additionally raised if necessary.
  • both the main dam and the relief wall are rebuilt.
  • the process is therefore also suitable for new construction projects where there was no main dam wall.
  • the main dam can be built more cost-effectively from the outset, since the load on the main dam during operation is lower.
  • more than one relief wall can also be built, in particular a cascade of relief walls can theoretically be provided, with each subsequent downstream wall having a lower height than the previous one. It is irrelevant whether the main dam or the spillway wall is designed as a gravity dam, as an arch dam or as a pillar dam - the process works with any type of main dam or spillway wall.
  • the main dam and the spillway wall preferably each include at least one reference point, with which a change in shape of the main dam and/or the spillway wall and a displacement of the main dam and/or the spillway wall relative to one another can be monitored or regularly checked.
  • the reference point can also be omitted.
  • the relief lake preferably comprises at least one intermediate floor.
  • a swimming pool or the like can thus be formed, for example.
  • the intermediate floor is preferably only firmly anchored on one side, for example in the main dam, so that neither tensile nor compressive forces act between the main dam and the relief wall.
  • the relief lake between the main dam and the relief wall can be used in many different ways.
  • the relief lake can be used as a leisure facility, in particular as a water sports facility, as a swimming pool and/or for fish farming or fishing.
  • the relief lake can also be used as a stilling basin.
  • Other applications are known to those skilled in the art.
  • the relief lake can also remain unused.
  • a gravity dam (1) is shown, which is in need of rehabilitation due to its long service life of decades to hundreds of years. Because the renovation requires the emptying of the reservoir (2) and the shutting down of the power plant for the production of electricity for months to years and will therefore cause large operating losses, after 2 a replacement dam (4) planned and built in certain cases.
  • the replacement dam wall (4) at the same level as the main dam wall (1) completely replaces the old dam wall (1), which mostly remains and is flooded later.
  • the dam (1) under monument protection there would be discussions.
  • the existing dam wall (1) which is in need of renovation and is referred to here as the main dam wall, is simultaneously strengthened and relieved through low construction costs.
  • a relief wall (5) of lower height is used according to 3 built.
  • the relief wall (5) is located down the valley (downstream) from the main dam (1).
  • the minimum distance between the relief wall (5) and the main dam (1) can be as small as you like (e.g. down to 0.1 m).
  • the maximum distance is generally unlimited, but essentially depends on the geographic location of the valley and the construction costs.
  • the space between the two dams (1, 5) is filled with water, creating a relief lake (6) with an open surface to the atmosphere.
  • the filling level of the relief lake (6) can be changed. In general, the level set remains constant. Temporal or continuous inflow and outflow from the spillway lake (6) in certain quantities are permitted for specific purpose.
  • the main dam (1), the spillway wall (5) and the spillway lake (6) form a dam arrangement (13, 14) with a spillway effect.
  • the main dam (1) can be a gravity dam, an arch dam and a wall with other designs.
  • the main dam (1) can be a new development.
  • the level of the discharge lake (6) determines the degree of discharge of the main dam (1) (see above).
  • the hydrostatic pressure forces (7) in the discharge lake (6) are set against the pressure forces (3) on the main dam wall (1) in the corresponding area. This reduces the overall compressive forces (8) in the main dam (1), see 4 . This is most effective, since with a dam wall (1) the greatest load is always in the lower part of the wall.
  • the water in the relief lake (6) also ensures that the gravity dam (1) under consideration is additionally strengthened by an additional mass of water (9) pressing the wall down ( figure 5 ). Both the strengthening and the relief of the main dam (1) depend on the level of the relief lake (6).
  • the reinforcement of a gravity dam (1) for example, is done by additional mass (9) of the water figure 5 . This also depends on the inclination of the outer wall of the dam (1).
  • the reinforcement and relief of the main dam wall (1) achieved by the relief wall (5) and the water-filled relief lake (6) only depend on the fill level of the relief lake (6). They are of the amount of water in the relief lake (6) and therefore independent of the distance between the two walls (1, 5).
  • the relief wall (5) can be built as close to the main dam (1) as you like, as long as the two walls are separated from the water in the relief lake (6).
  • the dam wall thickness can be kept small ( Figures 3 and 4 ). Because of the additionally small width of the valley ( 6 ) in the lower area of the valley, a lot of building materials (stones, concrete) can be saved overall.
  • the dam (1) can be built correspondingly thin if the relief wall (5) is also built.
  • the overall building materials decrease accordingly.
  • the construction of the relief wall (5) based on the latest technology also creates a feeling of increased security among the population.
  • the free surface relief lake (6) can be made into a recreational facility such as a free swimming pool. To ensure security, an intermediate floor (10) z. B. be laid out of plates ( 8 ).
  • the water is still to be drawn from the upper reservoir (2).
  • the old dam wall (1) which is in need of rehabilitation, the previous one remains received piping system.
  • the water in the lower relief lake (6) is typically not used for electricity production.
  • the importance of the relief lake (6) in connection with the relief wall (5) lies in the fact that a relief degree of e.g. 25% to 90% (see above) can be achieved.
  • a dam arrangement (13) consists of a main dam (1), a relief wall (5) and a relief lake (6) with an open surface, the main dam (1) often being an old wall and therefore in need of renovation.
  • the spillway wall (5) is installed at low height, any shape and thickness (wall thickness) downstream of the main dam wall (1), including dam wall, dam and dam.
  • the height of the relief wall (5) is preferably 30% to a maximum of 95% of the height of the main dam (1), both walls being measured from the same altitude (12) of the lowest point in the terrain of the main dam (1) ( 3 ).
  • the crest (upper edge) of the spillway wall is preferably at least 5% below the crest of the main dam wall (1) from the height of the main dam wall (1).
  • the discharge lake (6) preferably has a free surface, the free space between the main dam (1) and the discharge wall (5) being completely or partially filled with water.
  • the relief lake (6) is preferably used in whole or in part for special applications such as leisure facilities, swimming pools, water sports, fish farming and fishing, and as a water source for other experiments with specific objectives.
  • One or more intermediate floors (10) are preferably built in the relief lake (6).
  • Several reference points (11) are preferably attached to the main dam wall (1) and the relief wall (5) in a dam structure arrangement (14) in order to regularly check the deformation of and relative displacements between the two walls.
  • the spillway wall (5) and the spillway lake (6) are preferably also used when the main dam (1) is new or is being built.
  • a method for relieving existing dam walls is created in which emptying of the reservoir can be avoided and at the same time construction volume (stones and concrete) can be saved.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Barrages (AREA)
EP22180503.9A 2021-07-08 2022-06-22 Soulagement de barrage Pending EP4116497A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH0700292021 2021-07-08
CH70127/21A CH718431B1 (de) 2021-07-08 2021-08-02 Verfahren zur Entlastung einer Hauptstaumauer einer Staubauwerksanordnung.

Publications (1)

Publication Number Publication Date
EP4116497A1 true EP4116497A1 (fr) 2023-01-11

Family

ID=82214372

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22180503.9A Pending EP4116497A1 (fr) 2021-07-08 2022-06-22 Soulagement de barrage

Country Status (2)

Country Link
EP (1) EP4116497A1 (fr)
CN (1) CN114855709A (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US779703A (en) * 1903-09-15 1905-01-10 Emmet V R Gardner Filter-dam.
FR594913A (fr) * 1924-03-12 1925-09-23 Perfectionnements aux digues ou barrages

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101660301A (zh) * 2009-09-09 2010-03-03 中国瑞林工程技术有限公司 一种阶梯式尾矿库排洪方法
CN102192071A (zh) * 2010-03-16 2011-09-21 何振华 一种利用现有水库水利资源二次发电的装置
CN104234013B (zh) * 2014-08-29 2017-05-17 蔡燕春 一种水库大坝
FR3031992B1 (fr) * 2015-01-27 2017-02-24 Electricite De France Dispositif de retenue d'eau
CN205171469U (zh) * 2015-09-07 2016-04-20 四川省华地建设工程有限责任公司 泥石流拦挡坝防冲消能结构
CN108561670A (zh) * 2018-06-22 2018-09-21 中国电建集团贵阳勘测设计研究院有限公司 一种用于重力流输水***水锤防护***
CN109235362A (zh) * 2018-08-18 2019-01-18 叶兴 漫流汇流引冲自溃堤坝土工板非常分洪道
CN208803436U (zh) * 2018-09-13 2019-04-30 甘肃省科学院地质自然灾害防治研究所 自保护式泥石流拦挡坝
CN110258455B (zh) * 2019-05-25 2023-12-22 天津长瑞大通流体控制***有限公司 一种抵抗高水位的水坝***和方法
CN210917200U (zh) * 2019-08-05 2020-07-03 湖北省水利水电规划勘测设计院 一种堰塞湖永久整治结构
CN111206540A (zh) * 2020-02-28 2020-05-29 苏州金螳螂园林绿化景观有限公司 水体净化生态滤坝
CN112746597A (zh) * 2020-12-30 2021-05-04 贵阳市水利水电勘测设计研究院有限公司 一种高水位的水坝***

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US779703A (en) * 1903-09-15 1905-01-10 Emmet V R Gardner Filter-dam.
FR594913A (fr) * 1924-03-12 1925-09-23 Perfectionnements aux digues ou barrages

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CN114855709A (zh) 2022-08-05

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