CN104120743A - Concrete pile protection method used in marine environment - Google Patents
Concrete pile protection method used in marine environment Download PDFInfo
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- CN104120743A CN104120743A CN201410217590.3A CN201410217590A CN104120743A CN 104120743 A CN104120743 A CN 104120743A CN 201410217590 A CN201410217590 A CN 201410217590A CN 104120743 A CN104120743 A CN 104120743A
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Abstract
The invention discloses a concrete pile protection method used in the marine environment. According to the method, firstly the surface of a concrete pile is polished, and then the surface of the pile is coated with an epoxy primer layer and an epoxy intermediate paint layer. The paint coating layer is wrapped with corrosion prevention tape after being cured and is further wrapped and fastened by a prefabricated armor, and the upper end and the lower end of the paint coating layer which is wrapped and fastened by the armor and the flange connection position are filled with in-water curing epoxy adhesives, and the airtightness of a whole protective system is improved. The concrete pile protection method is simple in structure, convenient to construct and remarkable in preservative effect, achieves long-acting protection of the concrete pile and guarantees that the service life of concrete engineering can be equal to or even be longer than the service life required by the design. By the adoption of the concrete pile protection method, it is guaranteed that the service life can reach over 20 years to 30 years, if the armor is destroyed by external force, the armor can be replaced quickly without destroying the whole system, and construction is very convenient in the later maintenance process.
Description
Technical field
The present invention relates to concrete pile means of defence in a kind of marine environment, specifically the coated means of defence of a kind of marine environment mesotidal range district He Langjian district concrete pile, belongs to antiseptic concrete field of engineering technology.
Background technology
Along with developing rapidly of Chinese large-sized Oversea bridge and other harbour engineering construction, the etching problem of the reinforced concrete pile in marine environment more and more comes into one's own.Particularly under the adverse circumstances in He Langjian district, seawater Tidal zone, make concrete pile corrosion protection problem be subject to very large challenge, the ocean concrete engineering that is positioned at He Langjian district, Tidal zone, ocean not only relates to alternation of wetting and drying problem, also have sputter, the water flow mud-sand of wave to wash away, the problem such as marine organisms corrode, foreign matter collision, the aging speed of concrete pile is accelerated, inner reinforcing bar is caused to corrosion, affect the application life of marine structure.Under this environment, the salinity of high concentration, chemical ion, oxygen, the temperature difference and due to the mechanical failure that is subject to marine float thing and causes, make He Langjian district, marine environment mesotidal range district become the most impaired and the fastest region of corrosion rate of concrete pile.In China, many concrete piles in marine environment have been used many years, and corrosion and impaired quite serious, needs running maintenance, never has good way and thoroughly solves this difficult problem, has caused huge economic loss.
At present, the conventional means of defence of concrete pile member in this type of marine environment is mainly contained to modes such as adding concrete corrosion resistant agent, impregnating with silane processing, polyurea coating protection, coated prefabricated armor protection and the protection of moisturecuring painting layer.But all there is a comparatively serious total defect in above-mentioned the whole bag of tricks in concrete pile protection process, be that concrete corrosion resistant agent can only play certain protective action to concrete corrosion, and to water flow mud-sand wash away and the erosion of marine growth does not have protective action.
Concrete, in the process of processing at impregnating with silane, because of the impact of the factors such as silane consumption, coating process, environment temperature, concrete surface humidity, the length of penetration of silane and tack are reduced, and silane is aging fast, cannot reach lasting, desirable protection effect; In addition, impregnating with silane has very high requirement to concrete water content, only when concrete reaches quite high degree of drying, and the effect that dipping has just had, this is the condition can not meet in a lot of marine environment; And after silane infiltration concrete surface layer, it scolds water effect that concrete water content is reduced, and has facilitated CO
2to the diffusion of inside concrete, deepened the carbonation depth of concrete substrate.
Although polyurea coating is pollution-free, the feature such as there is rapid curing, excellent physicochemical property, excellent heat stability, abrasion resistance be good, but because polyurea materials reaction speed is fast, can not in basic unit, well permeate, easily peel off and lose its protective action, use polyurea materials expensive as protective materials price comparison completely, this has limited the application of polyurea materials to a certain extent simultaneously.
Although coated prefabricated armor protection can to seawater silt wash away and the shock of foreign matter plays effective protection, but due to clad structure and be wrapped by and have unavoidably certain gap between matrix, this will cause chlorion to be penetrated into armor and basal body interface by these gaps, thereby concrete pile is caused to corrosion.
Although moisturecuring painting layer protection system can effectively protect concrete substrate top layer, the toughness of coating and ornamental better, aging speed is slow, and the adhesive power of coating and concrete substrate is low, and coating is easy to come off and causes anticorrosion inefficacy; In addition this method complex technical process, the application cycle is long, and the engineering in Lang Jian district and Tidal zone environment is difficult to construct; And the durability of painting layer in marine environment is low, within general 5～10 years, will thoroughly keep in repair, its maintenance cost is even taller than application first.
Summary of the invention
Long-lasting protection problem for the marine environment mesotidal range district He Langjian district concrete pile existing in above-mentioned prior art, the invention provides concrete pile means of defence in a kind of marine environment, for the concrete pile in He Langjian district, marine environment Tidal zone, provide a kind of simple in structure, easy construction, the significant protection system of antiseptic effect, thereby realize the long-lasting protection to concrete pile, meet or exceed designing requirement the application life of assurance concrete work.
To achieve these goals, in this marine environment, concrete pile means of defence comprises the following steps:
Step 1, first polishes to concrete pile surface, cleans out the floating ash in surface and insecure attachment, and the depression that effects on surface exists is filled and led up, and guarantees concrete pile surfacing; Then concrete pile surface is dried to processing;
Step 2, to the concrete pile external coating epoxy primer layer of handling well, after solidifying priming paint, enamelled coating in the middle of application epoxy, in the middle of epoxy, enamelled coating minute twice are carried out application;
Step 3, after enamelled coating surface drying in the middle of epoxy, adopts the mode of spiral winding to form anti-corrosion belt winding layer anti-corrosion belt;
Step 4, measures good position accurately, adopts press device by crooked coated being close on the anti-corrosion belt winding layer having wound of the prefabricated whole shape armor with toughness, forms armor deck;
Step 5, armor two ends have the flange being used for fixing of having reserved, and by the position alignment of the flange upper bolt hole of armor, after coated fastening getting well, by bolt, are undertaken fastening;
Step 6, the end, two ends up and down of armor deck and flange connect gap fill water in cured epoxy adhesive.
Further, the anti-corrosion belt that in described step 3, anti-corrosion belt winding layer adopts is that synthetic fiber cloth is flooded and formed in the solvent that is mixed with inertia oiliness ore deposit ester, filler, corrosion inhibiter, anticorrisive agent, then forms the anti-corrosion belt with sandwich construction coated with diaphragm seal.
Further, the anti-corrosion belt that in described step 3, anti-corrosion belt winding layer adopts be by the solvent coating that is mixed with inertia oiliness ore deposit ester, filler, corrosion inhibiter, anticorrisive agent on the two sides of described synthetic fiber cloth, then coated with diaphragm seal, form the anti-corrosion belt with sandwich construction.
Further, the width of the anti-corrosion belt that in described step 3, anti-corrosion belt winding layer adopts is 200～600mm, thickness is 1～2mm, when being wound around, described anti-corrosion belt winding layer adopts the scrap (bridge) that meets 50～60% width, during winding, pin tightly top, make it be close to concrete pile surface, every winding one volume flattens lap-joint along spiral winding direction, avoids adhesive tape to put oversizely; In the process being wound around, remain certain pulling force, make all whole circles of at least complete winding one of the top of concrete pile and bottom.
Further, in described step 2, the application thickness of epoxy primer layer is 30～60 μ m, and the application thickness of twice epoxy intermediate coat layer is 180～250 μ m, and per pass thickness is 90～125 μ m.
Further, in described step 4 and step 5, the armor material of armor deck is polyethylene, polyvinyl chloride or polypropylene.
Further, in described step 5 the order of bolton for to carry out successively fastening to centre from the two ends of described armor deck.
Further, in described step 4 and step 5, the length of armor deck is determined according to the drop height between the low tide of protected area and high water mark, the lower end of armor deck reaches the following 500～1000mm of low tide, the upper end of an armor deck above 500～1000mm that reaches a climax; Armor Laminate construction thickness is 1.6～3.0mm.
Compared with prior art; in this marine environment, concrete pile means of defence provides a kind of simple in structure, easy construction, the significant clad type protection system of antiseptic effect structure for the concrete pile in He Langjian district, marine environment Tidal zone; on the basis of painting layer, carry out carrying out again the coated protection of armor after anti-corrosion belt winding; fully integrate the advantage of utilizing two kinds of technology; the long-effective protection of realization to maritime concrete; thereby realize the long-lasting protection to concrete pile, meet or exceed designing requirement the application life of assurance concrete work.
In this marine environment, the concrete beneficial effect of concrete pile means of defence is as follows:
1, in the present invention, concrete pile surface, through the transition processing of grinding process and intermediate coat, can guarantee that the winding of anti-corrosion belt and stake fit tightly;
2, the present invention adopts epoxy primer to carry out a surface-closed processing, thereby can effectively prevent that corrosive medium is penetrated into armor the inside stake is caused to corrosion;
3, the armor material that the present invention selects has good toughness, the destruction that can effectively avoid the collision of external force to cause armor;
4, the two ends up and down of armor of the present invention and flange connections all filled can be in water cured epoxy adhesive, can effectively prevent the intrusion of seawater, thereby improve the barrier propterty of whole system;
5, armor of the present invention is fastened on armor by fender pile by special pressure equipment, and compactness is between the two fine, has guaranteed that whole protection system can be securely fixed in a position that needs protection.
Adopt concrete pile means of defence in this marine environment, protection at least can guarantee more than 20～30 years in the life-span, and if armor after being subject to outside destroy, can carry out quick-replaceable for armor, and need not destroy whole system, in the maintenance and repair in later stage, construct very convenient.
The specific embodiment
Below in conjunction with specific embodiment, the present invention will be further described.
In this marine environment, the concrete steps of concrete pile means of defence are:
Step 1, first polishes to concrete pile surface, cleans out the floating ash in surface and insecure attachment, and the depression that effects on surface exists is filled and led up, and guarantees concrete pile surfacing; Then concrete pile surface is dried to processing;
Step 2, to the concrete pile external coating epoxy primer layer of handling well, after solidifying priming paint, enamelled coating in the middle of application epoxy, in the middle of epoxy, enamelled coating minute twice are carried out application; Epoxy primer layer plays the effect of a dead air space, further the space on closed concrete stake surface; In the middle of epoxy, enamelled coating minute twice application can be strengthened the effect of epoxy primer layer, plays the effect of excessive layer simultaneously between anti-corrosion belt winding layer and epoxy primer layer, and anti-corrosion belt winding layer can be fitted tightly more with skin of paint, guarantees protection effect.
Step 3, after enamelled coating surface drying in the middle of epoxy, adopts the mode of spiral winding to form anti-corrosion belt winding layer anti-corrosion belt;
Step 4, measures good position accurately, adopts press device by crooked coated being close on the anti-corrosion belt winding layer having wound of the prefabricated whole shape armor with toughness, forms armor deck; Can be better and concrete pile laminating, monolithic devices armor carries out bending and is coated after fastening and only exists a flange in conjunction with gap, has effectively reduced the passage that corrosive medium enters, and has significantly improved protection effect.
Step 5, armor two ends have the flange being used for fixing of having reserved, and by the position alignment of the flange upper bolt hole of armor, after coated fastening getting well, by bolt, are undertaken fastening;
Step 6, the end, two ends up and down of armor deck and flange connect gap fill water in cured epoxy adhesive.In water, cured epoxy adhesive in a humid environment, can rapid curing; In water, can there is good sealing performance; There is excellent ageing-resistant decay resistance.
Further, the anti-corrosion belt that in described step 3, anti-corrosion belt winding layer adopts is that synthetic fiber cloth is flooded and formed in the solvent that is mixed with inertia oiliness ore deposit ester, filler, corrosion inhibiter, anticorrisive agent, then forms the anti-corrosion belt with sandwich construction coated with diaphragm seal.There is good ageing-resistant, decay resistance.
Further, the anti-corrosion belt that in described step 3, anti-corrosion belt winding layer adopts be by the solvent coating that is mixed with inertia oiliness ore deposit ester, filler, corrosion inhibiter, anticorrisive agent on the two sides of described synthetic fiber cloth, then coated with diaphragm seal, form the anti-corrosion belt with sandwich construction.Employing can be played good ageing-resistant, decay resistance equally at the above-mentioned mixed solvent of synthetic fiber cloth coated on both sides.
Further, the width of the anti-corrosion belt that in described step 3, anti-corrosion belt winding layer adopts is 200～600mm, thickness is 1～2mm, when being wound around, described anti-corrosion belt winding layer adopts the scrap (bridge) that meets 50～60% width, during winding, pin tightly top, make it be close to concrete pile surface, every winding one volume flattens lap-joint along spiral winding direction, avoids adhesive tape to put oversizely; In the process being wound around, remain certain pulling force, make all whole circles of at least complete winding one of the top of concrete pile and bottom.Adopt the canoe of above-mentioned scrap (bridge) can play the double-deck effect being wound around, and can guarantee that anti-corrosion belt winding layer 4 is closely fitted on concrete pile.
Further, in described step 2, the application thickness of epoxy primer layer is 30～60 μ m, and the application thickness of twice epoxy intermediate coat layer is 180～250 μ m, and per pass thickness is 90～125 μ m.Reach best sealing protection effect.
Further, in described step 4 and step 5, the armor material of armor deck is polyethylene, polyvinyl chloride or polypropylene, can meet bending and be coated on the feasibility on concrete pile.
Further, in described step 5, the order of bolton is fastening for carrying out successively to centre from the two ends of described armor deck, has guaranteed the fastening effect of armor deck.
Further, in described step 4 and step 5, the length of armor deck is determined according to the drop height between the low tide of protected area and high water mark, the lower end of armor deck reaches the following 500～1000mm of low tide, the upper end of an armor deck above 500～1000mm that reaches a climax; Armor Laminate construction thickness is 1.6～3.0mm.The protection effect of armor deck is effectively ensured, the significant prolongation protection life-span.
Adopt concrete pile means of defence in this marine environment, the protection life-span of concrete pile at least can guarantee more than 20～30 years, if armor is after being subject to outside destroy, can carry out quick-replaceable for armor, and need not destroy whole system, in the maintenance and repair in later stage, construct very convenient.
Claims (8)
1. a concrete pile means of defence in marine environment, is characterized in that, the concrete steps of described means of defence are:
Step 1, first polishes to concrete pile surface, cleans out the floating ash in surface and insecure attachment, and the depression that effects on surface exists is filled and led up, and guarantees concrete pile surfacing; Then concrete pile surface is dried to processing;
Step 2, to the concrete pile external coating epoxy primer layer of handling well, after solidifying priming paint, enamelled coating in the middle of application epoxy, in the middle of epoxy, enamelled coating minute twice are carried out application;
Step 3, after enamelled coating surface drying in the middle of epoxy, adopts the mode of spiral winding to form anti-corrosion belt winding layer anti-corrosion belt;
Step 4, measures good position accurately, adopts press device by crooked coated being close on the anti-corrosion belt winding layer having wound of the prefabricated whole shape armor with toughness, forms armor deck;
Step 5, armor two ends have the flange being used for fixing of having reserved, and by the position alignment of the flange upper bolt hole of armor, after coated fastening getting well, by bolt, are undertaken fastening;
Step 6, the end, two ends up and down of armor deck and flange connect gap fill water in cured epoxy adhesive.
2. concrete pile means of defence in a kind of marine environment according to claim 1, it is characterized in that, the anti-corrosion belt that in described step 3, anti-corrosion belt winding layer adopts is that described synthetic fiber cloth is flooded and formed in the solvent that is mixed with inertia oiliness ore deposit ester, filler, corrosion inhibiter, anticorrisive agent, then forms the anti-corrosion belt with sandwich construction coated with diaphragm seal.
3. concrete pile means of defence in a kind of marine environment according to claim 1, it is characterized in that, the anti-corrosion belt that in described step 3, anti-corrosion belt winding layer adopts be by the solvent coating that is mixed with inertia oiliness ore deposit ester, filler, corrosion inhibiter, anticorrisive agent on the two sides of described synthetic fiber cloth, then coated with diaphragm seal, form the anti-corrosion belt with sandwich construction.
4. according to concrete pile means of defence in a kind of marine environment described in claim 1,2 or 3, it is characterized in that, the width of the anti-corrosion belt that in described step 3, anti-corrosion belt winding layer adopts is 200～600mm, thickness is 1～2mm, when described anti-corrosion belt winding layer is wound around, adopt the scrap (bridge) that meets 50～60% width, during winding, pin tightly top, make it be close to concrete pile surface, every winding one volume flattens lap-joint along spiral winding direction, avoids adhesive tape to put oversizely; In the process being wound around, remain certain pulling force, make all whole circles of at least complete winding one of the top of concrete pile and bottom.
5. concrete pile means of defence in a kind of marine environment according to claim 1, it is characterized in that, in described step 2, the application thickness of epoxy primer layer is 30～60 μ m, and the application thickness of twice epoxy intermediate coat layer is 180～250 μ m, and per pass thickness is 90～125 μ m.
6. concrete pile means of defence in a kind of marine environment according to claim 1, is characterized in that, in described step 4 and step 5, the armor material of armor deck is polyethylene, polyvinyl chloride or polypropylene.
7. concrete pile means of defence in a kind of marine environment according to claim 1, is characterized in that, in described step 5, the order of bolton is for to carry out successively fastening from the two ends of described armor deck to centre.
8. according to concrete pile means of defence in a kind of marine environment described in claim 1 or 6, it is characterized in that, in described step 4 and step 5, the length of armor deck is determined according to the drop height between the low tide of protected area and high water mark, the lower end of armor deck reaches the following 500～1000mm of low tide, the upper end of an armor deck above 500～1000mm that reaches a climax; Armor Laminate construction thickness is 1.6～3.0mm.
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| CN105423066A (en) * | 2015-12-08 | 2016-03-23 | 中国石油天然气集团公司 | Anti-corrosion repairing method for flange on ocean oil platform |
| CN106366619A (en) * | 2016-08-26 | 2017-02-01 | 新疆森泰电力科技有限公司 | Anti-corrosion wind-proof protecting armour and machining process thereof |
| CN106592782A (en) * | 2016-11-22 | 2017-04-26 | 刘礼潮 | Water and corrosion preventing treatment method for building |
| CN107152021A (en) * | 2017-06-06 | 2017-09-12 | 中国石油天然气集团公司 | A kind of U-tube stake armor installation tool |
| CN107386337A (en) * | 2017-06-07 | 2017-11-24 | 国家电网公司 | Concrete foundation anticorrosion structure and its application |
| CN107724439A (en) * | 2017-10-19 | 2018-02-23 | 深圳安盾海洋新材料有限公司 | A kind of method of the antifouling armor of extra large work facility, heavy antisepsis cladding |
| CN109356205A (en) * | 2018-09-15 | 2019-02-19 | 深圳市蛇口招商港湾工程有限公司 | Application that sulphoaluminate cement base material is constructed in ocean engineering, structure, template |
| CN109797873A (en) * | 2019-01-21 | 2019-05-24 | 上海岐海防腐工程技术有限公司 | A kind of Tidal zone concrete component is wrapped means of defence |
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| CN105423066B (en) * | 2015-12-08 | 2017-11-21 | 中国石油天然气集团公司 | A kind of method that flange on offshore platform carries out anti-corrosion reparation |
| CN106366619A (en) * | 2016-08-26 | 2017-02-01 | 新疆森泰电力科技有限公司 | Anti-corrosion wind-proof protecting armour and machining process thereof |
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| CN107152021A (en) * | 2017-06-06 | 2017-09-12 | 中国石油天然气集团公司 | A kind of U-tube stake armor installation tool |
| CN107152021B (en) * | 2017-06-06 | 2023-03-28 | 中国石油天然气集团公司 | U-shaped pipe pile armour mounting tool |
| CN107386337A (en) * | 2017-06-07 | 2017-11-24 | 国家电网公司 | Concrete foundation anticorrosion structure and its application |
| CN107724439A (en) * | 2017-10-19 | 2018-02-23 | 深圳安盾海洋新材料有限公司 | A kind of method of the antifouling armor of extra large work facility, heavy antisepsis cladding |
| CN109356205A (en) * | 2018-09-15 | 2019-02-19 | 深圳市蛇口招商港湾工程有限公司 | Application that sulphoaluminate cement base material is constructed in ocean engineering, structure, template |
| CN109797873A (en) * | 2019-01-21 | 2019-05-24 | 上海岐海防腐工程技术有限公司 | A kind of Tidal zone concrete component is wrapped means of defence |
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Application publication date: 20141029 |