CN105350491B - A kind of high altitude localities dam upstream face impermeable coating and its construction method - Google Patents
A kind of high altitude localities dam upstream face impermeable coating and its construction method Download PDFInfo
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- CN105350491B CN105350491B CN201510698871.XA CN201510698871A CN105350491B CN 105350491 B CN105350491 B CN 105350491B CN 201510698871 A CN201510698871 A CN 201510698871A CN 105350491 B CN105350491 B CN 105350491B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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Abstract
A kind of high altitude localities dam upstream face impermeable coating of the present invention and its construction method, it is characterised in that：It is high resiliency modified epoxy clay that the coating is used for seamless normal concrete surface, and thickness is 1mm or so；It is bottom, middle level and surface layer composition for structural joint, expansion joint, construction joint and other location of cracks impermeable coatings：Wherein described subbing is the low viscosity epoxy resin of 0.1~0.2mm of thickness or so, and the middle level is the toughness reinforcing cloth of thickness 0.5mm, and the investment precoat is the polyaspartate polyurea of the nano modification of 0.5~1.0mm of thickness.The present invention is a kind of economical and practical barrier coat material system, and with the adaptability preferably in the special adverse circumstances in high altitude localities while with good barrier performance, hydraulic engineering is on active service safely, and there play the role of to be particularly important.
Description
Technical field
The invention belongs to dam concrete surface anti-seepage paint field, one kind is specifically referred in high altitude localities particular surroundings
Under the conditions of, the concrete surface impermeable coating and its construction method used in dam upstream face brushing.
Background technology
China high altitude localities, such as Tibet, Xinjiang area are richly stored with hydroelectric resources, but its utilization rate is only
It is 0.45% or so, the short of electricity of solution Tibet engineering, water shortage problem, intend a large amount of moneys of input during Tibet Autonomous Region's medium-term and long-term plans
Gold carries out big-and-middle-sized key water power hydraulic engineering construction, and the hydroelectric development of this area is following emphasis of China.Because these are high
Altitude Regions hydraulic structure is in that low pressure, the temperature difference are big, irradiates under high special harsh climate environment, in work progress and
Easily cause the positions such as distress in concrete, construction joint, structural joint, interlayer seam not reach antiseepage requirement after construction and seepage occur and show
As causing totally unfavorable influence safely to hydraulic structure.
High altitude localities is dry, sunny, ultraviolet strong, day and night temperature and annual range of temperature are big, and temperature shock is frequently
Numerous, this causes that concrete for hydraulic structure easily produces crack, while these areas are in the geology calamities such as geology active region, earthquake, landslide
Evil takes place frequently so that the crack of concrete generation is more, and is generally seam living, and deformation is frequent, deflection is big.The water retaining structures such as dam
During operation, upstream storehouse water electrode easily penetrates into crack, adds temperature cataclysm frequently, causes the freeze thawing of crack area concrete frequently, accelerates
The generation of hydraulic structure freeze-thaw damage；For hydraulic reinforced concrete structure thing, the corrosion of reinforcing bar can be also accelerated due to seepage
Deng.And these diseases can form chain reaction and vicious circle with seepage, so that the durability of concrete for hydraulic structure is subject to tight
The influence of weight, causes the hydraulic structure life-span to be remarkably decreased, and causes totally unfavorable influence to engineering safety operation, or even have routed
The extreme security incident such as dam occurs.
Therefore, a kind of economical and practical barrier coat material system is invented, is had while with good barrier performance
Adaptability preferably in the special adverse circumstances in high altitude localities, hydraulic engineering is on active service safely, and there play the role of to be particularly important.
The content of the invention
The purpose of the present invention is directed to above-mentioned deficiency, there is provided one kind is adapted in the special harsh climate environment in high altitude localities
Under, i.e., hypobaric hypoxia, dry, irradiation strong, day and night temperature and annual range of temperature are big, and earthquake such as takes place frequently at the geological conditions,
The concrete surface impermeable coating that dam upstream face brushing is used, has preferably in height while with good barrier performance
Adaptability in the special adverse circumstances in Altitude Regions, hydraulic engineering is on active service safely has particularly important effect.
The present invention provide technical scheme be：
A kind of high altitude localities dam upstream face impermeable coating, it is characterized in that：The coating is used for seamless common coagulation
Native surface is high resiliency modified epoxy clay, and thickness is 1mm or so；For structural joint, expansion joint, construction joint and other split
Seam position impermeable coating is bottom, middle level and surface layer composition：Wherein described subbing is the low of 0.1~0.2mm of thickness or so
Viscosity epoxy, the middle level is the toughness reinforcing cloth of thickness 0.5mm, and the investment precoat changes for the nanometer of 0.5~1.0mm of thickness
The polyaspartate polyurea of property；
Described high resiliency modified epoxy clay, its composition is A, B two-component composition, and wherein component A is by weight
Percentage is 30~50% bisphenol A epoxide resin, 20~30% silicon powder, 10~20% diluent, and 3~5% receive
Rice elastic granule mixing composition；B component is diamine or polynary amine curing agent, and wherein component A is with the weight ratio of B component
10:3。
The nano-elastic particle is elastic caoutchouc of the average grain diameter less than 1000nm prepared using nano-level grinder.Institute
The subbing of location of cracks impermeable coating is stated for low viscosity epoxy resin, its viscosity is 500~1000mPas, surface drying time 1h
~2h, hardening time 0.5h~2h.The middle level toughness reinforcing cloth, is the one kind in carbon cloth, tire base fabric, nylon cloth.
A kind of construction method of high altitude localities dam upstream face impermeable coating, it is characterised in that：Comprise the following steps：
A. washing and drying treatment is carried out to dam concrete basal plane；
B. each 20cm is extended toward seam cross direction in location of cracks, brushing low viscosity epoxy resin simultaneously makes its thickness reach 0.1
~0.2mm；
C. before bottom low viscosity epoxy resin surface drying, one layer of toughness reinforcing cloth is pasted thereon；
D. in the nano-material modified polyaspartate polyurea of toughness reinforcing cloth external coating 2~3 times, thickness up to 0.5~
1mm；
E. on remaining normal concrete surface, brushing high resiliency modified epoxy clay brushes all areas beyond various cracks
Domain, and effective overlap joint of 5~10cm is carried out with above-mentioned crack printed regions.
High altitude localities is dry, sunny, ultraviolet strong, day and night temperature and annual range of temperature are big, and temperature shock is frequently
Numerous, this causes that concrete for hydraulic structure easily produces crack, while these areas are in the geology calamities such as geology active region, earthquake, landslide
Evil takes place frequently so that the crack of concrete generation is more, and is generally seam living, and deformation is frequent, deflection is big.The water retaining structures such as dam
During operation, upstream storehouse water electrode easily penetrates into crack, adds that there's a sudden fall in temperature frequently, causes the freeze thawing of crack area concrete frequently, accelerates
The generation of hydraulic structure freeze-thaw damage；For hydraulic reinforced concrete structure thing, the corrosion of reinforcing bar can be also accelerated due to seepage
Deng.And these diseases can form chain reaction and vicious circle with seepage, so that the durability of concrete for hydraulic structure is subject to tight
The influence of weight, causes the hydraulic structure life-span to be remarkably decreased, and causes totally unfavorable influence to engineering safety operation, or even have routed
The extreme security incident such as dam occurs.
The present invention is a kind of economical and practical barrier coat material system, while with good barrier performance have compared with
The good adaptability in the special adverse circumstances in high altitude localities, hydraulic engineering is on active service safely, and there play the role of to be particularly important.
Specific embodiment
With reference to embodiment, the invention will be further described.
A kind of high altitude localities dam upstream face impermeable coating of the present invention, it is characterized in that：The coating is used for nothing
The normal concrete surface of seam is high resiliency modified epoxy clay, and thickness is 1mm or so；For structural joint, expansion joint, apply
Work is stitched and other location of cracks impermeable coatings are bottom, middle level and surface layer composition：Wherein described subbing be thickness 0.1~
The low viscosity epoxy resin of 0.2mm or so, the middle level for thickness 0.5mm toughness reinforcing cloth, the investment precoat be thickness 0.5~
The polyaspartate polyurea of the nano modification of 1.0mm；
Described high resiliency modified epoxy clay, its composition is A, B two-component composition, and wherein component A is by weight
Percentage is 30~50% bisphenol A epoxide resin, 20~30% silicon powder, 10~20% diluent, and 3~5% receive
Rice elastic granule mixing composition；B component is diamine or polynary amine curing agent, and wherein component A is with the weight ratio of B component
10:3。
The nano-elastic particle is elastic caoutchouc of the average grain diameter less than 1000nm prepared using nano-level grinder.Institute
The subbing of location of cracks impermeable coating is stated for low viscosity epoxy resin, its viscosity is 500~1000mPas, surface drying time 1h
~2h, hardening time 0.5h~2h.The middle level toughness reinforcing cloth, is the one kind in carbon cloth, tire base fabric, nylon cloth.
A kind of construction method of high altitude localities dam upstream face impermeable coating, it is characterised in that：Comprise the following steps：
A. washing and drying treatment is carried out to dam concrete basal plane；
B. each 20cm is extended toward seam cross direction in location of cracks, brushing low viscosity epoxy resin simultaneously makes its thickness reach 0.1
~0.2mm；
C. before bottom low viscosity epoxy resin surface drying, one layer of toughness reinforcing cloth is pasted thereon；
D. in the nano-material modified polyaspartate polyurea of toughness reinforcing cloth external coating 2~3 times, thickness up to 0.5~
1mm；
E. on remaining normal concrete surface, brushing high resiliency modified epoxy clay brushes all areas beyond various cracks
Domain, and effective overlap joint of 5~10cm is carried out with above-mentioned crack printed regions.
Embodiment 1, the construction of Yarlung Zangbo River middle reaches power station upstream barrier coat
Material of the invention and technique are applied in the dam face seepage of Yarlung Zangbo River middle reaches some hydropower station upstream.The water
Power station is normal concrete gravity dam, engineering dam site height above sea level, dry, winter severe cold, and temperature difference per day is larger, and engineering is long-term
Construction, not carrying out the winter has a rest, and concreting there may be defect.To improve the impervious level of dam water retaining structure, design requirement
Barrier coat protection is carried out to the concrete in the range of the certain elevation in upstream before dam retaining.
Upstream barrier coat construction demonstration has been carried out using material of the invention and matching operation technique.For dam
Structural joint, expansion joint, construction joint and other location of cracks construction processings that upstream face is present, its method is：To dam concrete
Basal plane is polished, after washing and drying treatment, extend each 20cm toward seam cross direction in location of cracks first, batch scrapes low viscosity ring
Oxygen tree fat 0.2mm；One layer of fibre reinforced toughness reinforcing cloth is pasted before bottom low viscosity epoxy resin surface drying；It is last to be applied on toughness reinforcing cloth surface
Brush nano-material modified polyaspartate polyurea 2~3 times, 0.7~1.0mm of thickness.The construction at other positions of dam surface
Method is：Polishing cleaning concrete surface, after high resiliency modified epoxy clay is scratched after dry tack free, brushes beyond various cracks
All regions, and effective overlap joint of 5~10cm width is carried out with above-mentioned crack treatment region.
Site Detection finds：The vertical coat side of more than 4.0MPa water under high pressures can be resisted after barrier coat solidification to continue
10min impacts, and the breakages such as erosion, peeling and cracking does not occur；Can more than renitency 1.2MPa the impervious detection of hydrostatic pressing；Hurry up
It is quick-frozen that to melt coating after cycle detection shows 200 Frozen-thawed cycleds intact, it is Nian Jie with base concrete firmly, the loss of test specimen Dynamic Elastic Module
Less than 5%, massless loss.
The impervious coating demonstration construction of embodiment 2, Tibet Nyang Qu rivers upstream key water control project overflow side weir
Material of the invention and construction technology resist in Tibet Nyang Qu rivers upstream key water control project overflow side weir concrete antifreezing
Ooze during repairing is protected and carried out exemplary construction.The hinge has the comprehensive benefits such as flood control, tourism, work concurrently based on irrigating, generate electricity
Journey scale is big (II) type, and reservoir capacity is 1.55 hundred million m3, the m3 of utilizable capacity 0.83 hundred million, builds up rear effective irrigation area 450,000
Mu, power station installed capacity is 20,000 kW, and design average annual energy output is 0.61 hundred million degree.Engineering lock retaining hair under 1999
Electricity, dam is clay core wall rockfill dam, and crest elevation 4260m, winter severe cold, dam is on active service 15 years, and core wall rockfill dam operation is good
It is good, but flood-discharge tunnel, diversion tunnel concrete structure part freeze-thaw damage are more serious, in the urgent need to carrying out antiseepage and freeze proof repairing
Protection.
The concrete impervious antifreeze exemplary construction of downflow weir has been carried out using material of the invention and matching operation technique.It is right
In structural joint, expansion joint, construction joint and other location of cracks construction processings that dam upstream face is present, its method is：To dam
Concrete surface is polished, after washing and drying treatment, it is low in each 20cm scopes blade coating in crack both sides along fractuer direction first
Viscosity epoxy 0.2mm；One layer of fibre reinforced toughness reinforcing cloth is pasted before bottom low viscosity epoxy resin surface drying；Finally in toughness reinforcing cloth
The nano-material modified polyaspartate polyurea of external coating 2~3 times, 0.7~1.0mm of thickness.Other position concrete tables
The construction method in face is：Polishing cleaning concrete surface, after high resiliency modified epoxy clay is scratched after dry tack free, brushes various
All regions beyond crack, and effective overlap joint of 5~10cm width is carried out with above-mentioned crack treatment region.
Key water control project overflow side weir impervious coating in Tibet Nyang Qu rivers upstream is by the operation in flood season, each side detection
Result shows that it works well, and coating has no damaged, comes off, and serves and anti-well blends anti-impact effect.
Embodiment 3, the anti-seepage of channels coating test construction of Tibet Man La irrigated areas
Tibet Man La irrigated areas are located at Yarlung Zangbo River upstream Nianchu river valley, and irrigated area controls completely to draw mining under reservoir to year Chu
The soil that river mouth two sides in river can flow automatically with irrigation by pumping, master control area is up to 530,000 mu, 42.68 ten thousand mu of designed irrigation area.Fill
Area builds together and is provided with 11 canal systems, there is a large amount of channels and water lift building.Due to height above sea level residing for irrigated area, winter severe cold, part
There is different degrees of freeze injury and seepage in concrete canal, is serious harm to channel health operation.
Freeze proof and impervious protection test is carried out to channel using material of the invention and construction technology, while also to increasing canal
Road concrete surface intensity and reduced water roughness and had very big benefit.The protection test method on channel surface is：Deposited for channel
Structural joint and other location of cracks elder generation concrete surface polished, after washing and drying treatment, first along fractuer direction
In each 15cm scopes blade coating low viscosity epoxy resin 0.2mm in crack both sides；One layer of tire is pasted before bottom low viscosity epoxy resin surface drying
Base fabric；The last polyaspartate polyurea nano-material modified in tire scrim surfaces brushing 2~3 times, 0.7~1.0mm of thickness.
The construction method of channel other position concrete surfaces is：Polishing cleaning concrete surface, after scratching high resiliency after dry tack free
Modified epoxy clay, brushes all regions beyond various cracks, and carry out having for 5~10cm width with above-mentioned crack treatment region
Effect overlap joint.
By operation more than a year, freeze proof and impervious protection effect is carried out to channel using material of the invention and construction technology
Substantially, channel concrete has no freeze-thaw damage to fruit, and outward appearance is good；Structural joint closing is preferable, has no breakthrough；Other cracks are repaiied
Benefit reaches design requirement, with more than concrete surface adhesive strength 3.0MPa.
High altitude localities is dry, sunny, ultraviolet strong, day and night temperature and annual range of temperature are big, and temperature shock is frequently
Numerous, this causes that concrete for hydraulic structure easily produces crack, while these areas are in the geology calamities such as geology active region, earthquake, landslide
Evil takes place frequently so that the crack of concrete generation is more, and is generally seam living, and deformation is frequent, deflection is big.The water retaining structures such as dam
During operation, upstream storehouse water electrode easily penetrates into crack, adds that there's a sudden fall in temperature frequently, causes the freeze thawing of crack area concrete frequently, accelerates
The generation of hydraulic structure freeze-thaw damage；For hydraulic reinforced concrete structure thing, the corrosion of reinforcing bar can be also accelerated due to seepage
Deng.And these diseases can form chain reaction and vicious circle with seepage, so that the durability of concrete for hydraulic structure is subject to tight
The influence of weight, causes the hydraulic structure life-span to be remarkably decreased, and causes totally unfavorable influence to engineering safety operation, or even have routed
The extreme security incident such as dam occurs.
The present invention is a kind of economical and practical barrier coat material system, while with good barrier performance have compared with
The good adaptability in the special adverse circumstances in high altitude localities, hydraulic engineering is on active service safely, and there play the role of to be particularly important.
The detailed description of specific embodiments of the present invention is the foregoing is only, the present invention is not limited with this, it is all at this
Any modification, equivalent and improvement for being made in the mentality of designing of invention etc., should be included in protection scope of the present invention it
It is interior.
Claims (4)
1. a kind of high altitude localities dam upstream face impermeable coating, it is characterized in that：The coating is used for seamless normal concrete
Surface, is high resiliency modified epoxy clay, and thickness is 1mm or so；For structural joint, expansion joint, construction joint and other split
The impermeable coating at position is stitched, is made up of subbing, middle level and investment precoat：Wherein described subbing be thickness 0.1~
The low viscosity epoxy resin of 0.2mm or so, the middle level for thickness 0.5mm toughness reinforcing cloth, the investment precoat be thickness 0.5~
The polyaspartate polyurea of the nano modification of 1.0mm；
Described high resiliency modified epoxy clay, its composition is A, B two-component composition, and wherein component A is by weight percent
Number is 30~50% bisphenol A epoxide resin, 20~30% silicon powder, 10~20% diluent, 3~5% nanometer bullet
Property particle mixing composition；B component is that diamine or polynary amine curing agent, wherein component A and the weight ratio of B component are 10:3.
2. a kind of high altitude localities dam upstream face impermeable coating according to claim 1, it is characterised in that：The nanometer
Elastic granule is elastic caoutchouc of the average grain diameter less than 1000nm prepared using nano-level grinder.
3. a kind of high altitude localities dam upstream face impermeable coating according to claim 1, it is characterised in that：The crack
The subbing of position impermeable coating be low viscosity epoxy resin, its viscosity be 500~1000mPas, surface drying time 1h~2h,
Hardening time 0.5h~2h.
4. a kind of high altitude localities dam upstream face impermeable coating according to claim 1, it is characterised in that：The middle level
Toughness reinforcing cloth is the one kind in carbon cloth, tire base fabric, nylon cloth.
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Families Citing this family (4)
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| CN106759113A (en) * | 2016-12-14 | 2017-05-31 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of construction method of high-velocity flow building impact-resisting wear-resisting protective coating |
| CN109763503B (en) * | 2019-01-29 | 2020-07-31 | 长沙理工大学 | Supporting structure for seepage-proofing reinforcement of soft rock slope and reinforcement method thereof |
| CN110256649B (en) * | 2019-06-27 | 2021-09-17 | 青岛爱尔家佳新材料股份有限公司 | Polyaspartate polyurea composite material and preparation method thereof |
| CN112854489B (en) * | 2021-03-19 | 2022-03-18 | 北京中水科海利工程技术有限公司 | Dam concrete surface integral impervious layer and forming method thereof |
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| JP2006314960A (en) * | 2005-05-16 | 2006-11-24 | Nippon Paint Co Ltd | Automobile coating film repairing method |
| CN203742001U (en) * | 2014-02-12 | 2014-07-30 | 广州市鲁班建筑工程技术有限公司 | Waterproof and reinforcing structure based on high-toughness and high-strength epoxy resin |
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Address after: 430010 Huangpu street, Hubei, No. 23, No. Co-patentee after: Huaneng Group Technology Innovation Center Patentee after: Changjiang Academy of Sciences, Changjiang Water Conservancy Committee Co-patentee after: Huaneng Tibet Brahmaputra Hydropower Development Investment Limited Address before: 430010 Huangpu street, Hubei, No. 23, No. Co-patentee before: Huaneng Group Technology Innovation Center Patentee before: Changjiang Academy of Sciences, Changjiang Water Conservancy Committee Co-patentee before: HUANENG TIBET POWER GENERATION CO., LTD. |
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