CN108179722A - A kind of temperature density current of floating structure is blocked device - Google Patents
A kind of temperature density current of floating structure is blocked device Download PDFInfo
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- CN108179722A CN108179722A CN201810131732.2A CN201810131732A CN108179722A CN 108179722 A CN108179722 A CN 108179722A CN 201810131732 A CN201810131732 A CN 201810131732A CN 108179722 A CN108179722 A CN 108179722A
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- fixedly connected
- buoyancy tank
- blocked
- density current
- floating structure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B1/00—Equipment or apparatus for, or methods of, general hydraulic engineering, e.g. protection of constructions against ice-strains
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- Mechanical Engineering (AREA)
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Abstract
A kind of temperature density current the invention discloses floating structure is blocked device, including be fixed on hydro plant intake upstream two sides, line perpendicular to water (flow) direction two Sarasotas；It is fixedly connected between described two Sarasotas by main push-towing rope；The main push-towing rope is fixedly connected with more chain splicing tops；It is fixedly connected close to the chain splicing bottom end of hydro plant intake upstream two sides with floating ball, remaining every chain splicing bottom end is respectively fixedly connected with a buoyancy tank；Each floating ball, each buoyancy tank are connect with a longitudinal cable top；The longitudinal direction cable bottom end is fixedly connected with anchor system；All longitudinal cables laterally assist cable to be fixedly connected with more, form reticular structure；All longitudinal drag-lines are fixedly connected with curtain；Adjacent buoyancy tank, homogeneously connects at adjacent floating ball between adjacent buoyancy tank and floating ball.The present invention block device can underwater construction, and larger pressure can be born, adapt to water level significantly change.
Description
Technical field
The present invention relates to hydraulic and hydroelectric engineering field, particularly one kind can underwater construction, and larger stress can be born, can fitted
Should the temperature density current of the significantly floating structure of SEA LEVEL VARIATION block device.
Background technology
Density current refers to the fluid that is not much different, can mutually be mixed due to two or more proportion in gravitational field, because
Difference of specific gravity and and generate flowing.One kind in temperature density current category density current.In the big library of high dam, mostly there are water temperature delaminations to show
As with water temperature density current, i.e. high temperature water density is light, positioned at upper strata；Low temperature water density weight, positioned at lower floor..
It is adversely affected caused by dam downstream ecology environment at the end of spring and the beginning of summer low-temperature discharge to alleviate reservoir, it need to be in electricity
Factory's intake upstream sets device of blocking, and blocks underlying low temperature water, it is avoided to enter water intake of power plant mouth, surface layer high temperature is let out under reaching
The purpose of water.
For the big library of high dam, reservoir area waters is broad, and cross-sectional area is big.Correspondingly, the area for device of blocking is mostly tens of thousands of
Even up to a million square metres.On the other hand, after device of blocking is built, only the lighter water body in surface layer can enter dress at the top of device
The back side is put, subsequently into intake.Block in this way device tow sides water body weight can there were significant differences, lead to device of blocking
Bear huge hydrostatic pressure.Under the action of these two aspects, the pressure for device of blocking is up to several kPas, the pressure integrally born
Up to a few kiloton even tons up to ten thousand.
And the existing device of blocking that can bear so big pressure, such as dam, it is necessary to it is repaiied after in construction area, water body is emptied
It builds, and construction period is very long.For existing reservoir, its economic benefits of power generating can not only be seriously affected by reducing reservoir level, can also
The serious secondary disasters such as landslide, landslide are generated, are built costly.
On the other hand, up to hundreds of meters of section river width or even a few kms before Dam.Build block device when, thereon
The span of square main body stress suspension cable is suitable with section river width, belongs to large span suspended cable structure, and bearing load is huge.
For the big library of high dam, reservoir water level fluctuation is frequent, and range of stage can exceed that 50 meters within 1 year etc.Due to main body stress
Suspension cable is fixed on a certain elevation in two sides, it is impossible to SEA LEVEL VARIATION.When reservoir area low water level operation, close to two sides buoyancy tank and block
Device will be disengaged from the water surface, hang in the sky so that main body stress suspension cable load significantly rises, and stress raisers can be caused to show
As.Jeopardize structure safety of blocking.
The device of blocking of existing energy underwater construction, more structures are simpler, scale is smaller, are not only difficult to bear so huge
Water pressure, and be difficult to the normal operation under the conditions of the water level of such significantly change.
In view of the above-mentioned problems, effective solution is not yet proposed in the industry.
Invention content
The technical problems to be solved by the invention are, in view of the shortcomings of the prior art, it is different to provide a kind of temperature of floating structure
Density current is blocked device, can underwater construction, and larger pressure can be born, adapt to water level significantly change.
In order to solve the above technical problems, the technical solution adopted in the present invention is：A kind of temperature density current of floating structure
Block device, including be fixed on hydro plant intake upstream two sides, line perpendicular to water (flow) direction two Sarasotas；Described two ropes
It is fixedly connected between tower by main push-towing rope；The main push-towing rope is fixedly connected with more chain splicing tops；On the hydro plant intake
The chain splicing bottom end of trip two sides is fixedly connected with floating ball, remaining every chain splicing bottom end is respectively fixedly connected with a buoyancy tank；It is described
Each floating ball, each buoyancy tank are connect with a longitudinal cable top；The longitudinal direction cable bottom end is fixedly connected with anchor system；Institute
The longitudinal cable having laterally assists cable to be fixedly connected with more, forms reticular structure；All longitudinal drag-lines are and curtain
It is fixedly connected；Adjacent buoyancy tank, homogeneously connects at adjacent floating ball between adjacent buoyancy tank and floating ball.
Sleeve buoyancy tank is cased on described two Sarasotas.And the main push-towing rope both ends are respectively fixed with corresponding sleeve buoyancy tank and are connected
It connects.Buoyancy tank is located in Sarasota main body, can following water-level lifting.Buoyancy tank had not only made main push-towing rope both ends be fixed on Sarasota, but can make main push-towing rope with
Water level floats up and down.
The main push-towing rope is coated in protective layer, and the protective layer uses buoyant material.Main push-towing rope can be made to resist dead weight, float on water
Face.
The curtain uses high-strength geomembrane or high-strength geotextile.
The curtain top is fixedly connected with exaggerated, and the curtain bottom end is fixedly connected with the anchor system, for steady
Surely it blocks structural form.
Gravity retaining wall, and the maximum of the elevation of the gravity retaining wall and device of blocking are both provided on the outside of described two Sarasotas
Elevation of blocking is identical.Gravity retaining wall material is armored concrete.
Described two Sarasota tower top elevations are above reservoir and check flood control level, and gravity retaining wall, material is armored concrete.
Described two Sarasota bottoms are both provided with Sarasota basis, and two Sarasota bases are fixed by Sarasota pile foundation.Ensure
Stabilized structure.
The anchor system includes gravity anchor chain and earth anchor, and the longitudinal direction cable is fixed by the earth anchor with the earth to be connected
It connects；The curtain is fixedly connected with the gravity anchor chain.
Compared with prior art, the advantageous effect of present invention is that：The present invention block device can underwater construction, and
It can bear larger pressure, adapt to water level significantly change.
Description of the drawings
Facade layout drawing when Fig. 1 is low water level operation of the embodiment of the present invention；
Fig. 2 is facade layout drawing when high water level of the embodiment of the present invention is run；
Fig. 3 is the part A enlarged drawing of embodiment of the present invention Fig. 1, Fig. 2.
Specific embodiment
As shown in Figure 1-Figure 3, the present invention is mainly made of cable system, buoyancy tank system, system of blocking, anchor system.
Cable system includes Sarasota（Left bank Sarasota 10, right bank Sarasota 14）, main push-towing rope 1 and chain splicing 2.Sarasota is arranged in power station
Intake upstream two sides, main push-towing rope is by two sides Sarasota tensioning, and material is high-strength steel tow, protective layer made of outsourcing buoyant material,
Main push-towing rope can be made to resist dead weight, bubbled through the water column.Sliding sleeve buoyancy tank is fixed at main push-towing rope both ends（Left bank sliding sleeve buoyancy tank 11, right bank
Sliding sleeve buoyancy tank 15）, left bank sliding sleeve buoyancy tank 11, right bank sliding sleeve buoyancy tank 15 are respectively fitted over left bank Sarasota 10, right bank
On Sarasota 14, sleeve buoyancy tank can following water-level lifting.A series of chain splicings 2 are fixed on main push-towing rope.
Buoyancy tank system is composed in series by a series of lightweight floating balls 3 and buoyancy tank 4.The sum of buoyancy tank, lightweight floating ball and chain splicing number
It measures corresponding, is fixed at the top of each buoyancy tank or lightweight floating ball with a chain splicing.Since most avris curtain is in low water level operation
When can be detached from the water surface, and the regional water is shallower, the curtain stress of unit width is smaller, therefore longitudinal drag-line connection in the region is light
Matter floating ball, main stem deepwater regions, the curtain stress of unit width is larger, and during low water level operation buoyancy tank system without departing from water
Additional duty is caused main push-towing rope in face, therefore selects weight larger, the stronger buoyancy tank of buoyancy.
System of blocking includes longitudinal drag-line 6, exaggerated 5, gravity anchor chain 8, curtain 19 and barricade, is fixed at the top of longitudinal drag-line
Buoyancy tank or lightweight floating ball bottom, longitudinal drag-line bottom are fixed on anchor system, laterally auxiliary cable 7 are set between longitudinal zipper,
Ensure longitudinal drag-line joint stress, avoid stress concentration.Curtain is fixed on longitudinal drag-line, and material is the high-strength soil of low permeability
Work film or high-strength geotextile.Top is exaggerated, and bottom is equipped with gravity anchor chain, for stablizing structural form of blocking.Positioned at the bottom
Anchor system is underwater earth anchor or gravity anchor, for stay guy.Gravity retaining wall is built on both sides bank（Left bank barricade 9 and the right side
Bank barricade 16）, material is armored concrete, and barricade elevation and device maximum of blocking elevation of blocking are identical.
Left bank Sarasota checks flood control level with right bank Sarasota tower top elevation higher than reservoir, i.e. water level will not exceed tower top.Water
Face is in Sarasota column foot（Column foot refers to left bank Sarasota basis 12, right bank Sarasota basis 16）When changing between tower top, buoyancy tank system,
Main push-towing rope and left bank, the sliding sleeve buoyancy tank of right bank change with the water surface.When water level is less than Sarasota basis, sliding sleeve buoyancy tank stops
On the basis of staying in, no longer decline, part curtain exposes the surface at this time, lightweight floating ball be detained and bank, buoyancy tank system and main push-towing rope after
Continue with SEA LEVEL VARIATION.Left bank Sarasota basis 12, right bank Sarasota basis 16 respectively with left bank Sarasota pile foundation 13, right bank Sarasota pile foundation 18
It is fixedly connected.
Curtain is main component of blocking, and is first subject to water pressure, is then transferred to laterally auxiliary cable and longitudinal drag-line.
Longitudinal Cable forces are distributed to the earth anchor 21 of lower end and the buoyancy tank of upper end.Stress is reached the earth 20 by earth anchor 21；The stress of buoyancy tank
It is divided into both direction, vertical stress is born by buoyancy tank system natural buoyancy, and horizontal direction force reaches chain splicing, is passed by chain splicing
To main push-towing rope, thus the tractive force of caused main push-towing rope is born by two sides Sarasota and reaches the earth.
And load is directly transmitted to the earth then after water pressure is born by bank curtain wall.
Embodiment the present embodiment relies on Guizhou clear water river third stock market water at low temperature harnessing project.Third stock market
It is the second level in the step hydropower station of 15, Wushui River mainstream, there is many years regulation performance, reservoir operation scheme 475.00m is maximum
Height of dam 185.5m, generating system by piloting water water inlet floor elevation 408.00m.After reservoir filling, reservoir area shows apparent temperature
Lamination, bottom storehouse water temperature are only 9.6 DEG C, and the temperature that causes to sluice under spring and summer season is less than water temperature under natural environment, to downstream fish
Oviposition breeding have an adverse effect.It, need to be on powerplant intakes for fish can be made to have suitable water temperature condition in the egg-laying season
Device of blocking is built at trip about 250m and improves the temperature that sluices under third stock market.
It is analyzed through numerical simulation calculation, block device water blocking area 36797m2, total load head is born as 1296t, longitudinal drag-line
Design 34, material are steel strand wires, outsourcing flexible protective layer.Lateral preventer guy is set between longitudinal drag-line, material is high-strength enlightening
Nima rope, adjacent drag-line spacing are 10m.By each longitudinal drag-line from left bank to right bank number consecutively, and calculate to obtain each longitudinal drag-line
Lower end vertical tension, horizontal pull and buoyancy tank buoyancy.
Anchor system use underwater earth anchor, earth anchor bore diameter 130mm, anchor pole reinforcing bar HRB400, select 3 it is a diameter of
The spiral beam of 36mm.For earth anchor under the regional water of depth of water 60m ~ 100m（Left bank number 1 ~ 5,31 ~ 34 longitudinal direction of right bank number
The corresponding anchor system of drag-line）Using single hole stress, remaining underwater earth anchor uses holes coaction scheme.
Two sides Sarasota material be armored concrete, cross section be 14m × 14m square, crest level 480m, bottom elevation with
Ground is concordant.Two towers are respectively provided with concave shape sliding sleeve buoyancy tank, and material is steel, buoyancy 100t, and buoyancy tank inner wall is contacted with Sarasota
Place sets pulley, and respective slide slots are set on Sarasota.Main push-towing rope material is high-strength steel tow, and diameter 70cm, outer layer is protective layer, in protective layer
For steel wire.Chain splicing material and exaggerated material are steel strand wires, outsourcing flexible protective casing.
Sarasota both sides be Reinforced Concrete Retaining Walls, the high 480m of wall top.
It, can be by the temperature that sluices under fish egg-laying season spring in May from 16.5 DEG C after device of originally blocking is implemented through numerical simulation calculation
It improves to 18.5 DEG C.As it can be seen that the present embodiment block-water effect is good, there is preferable promotional value.
Claims (10)
- The device 1. a kind of temperature density current of floating structure is blocked, which is characterized in that including being fixed on hydro plant intake upstream two Bank, line perpendicular to water (flow) direction two Sarasotas；Pass through main push-towing rope between described two Sarasotas（1）It is fixedly connected；The main push-towing rope （1）With more chain splicings（2）Top is fixedly connected；Chain splicing close to hydro plant intake upstream two sides（2）Bottom end is with floating Ball（3）It is fixedly connected, remaining every chain splicing（2）Bottom end respectively with a buoyancy tank（4）It is fixedly connected；Each floating ball（3）, it is every A buoyancy tank（4）With a longitudinal cable（6）Top connects；The longitudinal direction cable（6）Bottom end is fixedly connected with anchor system；It is all Longitudinal cable（6）Cable is laterally assisted with more（7）It is fixedly connected, forms reticular structure；All longitudinal drag-lines（6） With curtain（19）It is fixedly connected；Adjacent buoyancy tank（4）, adjacent floating ball（3）, adjacent buoyancy tank（4）With floating ball（3）Between it is homogeneous It connects.
- The device 2. the temperature density current of floating structure according to claim 1 is blocked, which is characterized in that described two Sarasotas On be cased with sleeve buoyancy tank, and the main push-towing rope both ends are respectively fixedly connected with corresponding sleeve buoyancy tank.
- The device 3. the temperature density current of floating structure according to claim 1 is blocked, which is characterized in that the main push-towing rope（1） It is coated in protective layer.
- The device 4. the temperature density current of floating structure according to claim 3 is blocked, which is characterized in that the protective layer is adopted Use buoyant material.
- The device 5. the temperature density current of floating structure according to claim 1 is blocked, which is characterized in that the curtain（19） Using high-strength geomembrane or high-strength geotextile.
- The device 6. the temperature density current of floating structure according to claim 1 is blocked, which is characterized in that the curtain（19） Top with it is exaggerated（5）It is fixedly connected, the curtain（19）Bottom end is fixedly connected with the anchor system.
- The device 7. the temperature density current of floating structure according to claim 1 is blocked, which is characterized in that described two Sarasotas Outside is both provided with gravity retaining wall, and the elevation of the gravity retaining wall and the maximum for device of blocking elevation of blocking are identical.
- The device 8. the temperature density current of floating structure according to claim 1 is blocked, which is characterized in that described two Sarasotas Tower top elevation is above reservoir and checks flood control level.
- The device 9. the temperature density current of floating structure according to claim 1 is blocked, which is characterized in that described two Sarasotas Bottom is both provided with Sarasota basis, and two Sarasota bases are fixed by Sarasota pile foundation.
- The device 10. the temperature density current of the floating structure according to one of claim 1~9 is blocked, which is characterized in that described Anchor system includes gravity anchor chain（8）And earth anchor（21）, the longitudinal direction cable（6）Pass through the earth anchor（21）With the earth（20）Gu Fixed connection；The curtain（19）With the gravity anchor chain（8）It is fixedly connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810131732.2A CN108179722A (en) | 2018-02-09 | 2018-02-09 | A kind of temperature density current of floating structure is blocked device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810131732.2A CN108179722A (en) | 2018-02-09 | 2018-02-09 | A kind of temperature density current of floating structure is blocked device |
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| CN108179722A true CN108179722A (en) | 2018-06-19 |
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| CN201810131732.2A Pending CN108179722A (en) | 2018-02-09 | 2018-02-09 | A kind of temperature density current of floating structure is blocked device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110904917A (en) * | 2019-12-04 | 2020-03-24 | 中国电建集团中南勘测设计研究院有限公司 | Water flow blocking device |
| CN111705759A (en) * | 2020-07-08 | 2020-09-25 | 大连理工大学 | Device for large variation of reservoir water level, intercepting sewage, guaranteeing flood discharge and generating safety |
| CN112227320A (en) * | 2020-09-30 | 2021-01-15 | 上海市东方海事工程技术有限公司 | Liftable interception net system |
| CN113356143A (en) * | 2021-05-31 | 2021-09-07 | 上海仪耐新材料科技有限公司 | Net body lifting device applied to entrance and exit area |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112227320A (en) * | 2020-09-30 | 2021-01-15 | 上海市东方海事工程技术有限公司 | Liftable interception net system |
| CN113356143A (en) * | 2021-05-31 | 2021-09-07 | 上海仪耐新材料科技有限公司 | Net body lifting device applied to entrance and exit area |
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