CN115928713A - Marine environment steel pipe pile integrated anti-corrosion sleeve and preparation method thereof - Google Patents
Marine environment steel pipe pile integrated anti-corrosion sleeve and preparation method thereof Download PDFInfo
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- CN115928713A CN115928713A CN202211585597.1A CN202211585597A CN115928713A CN 115928713 A CN115928713 A CN 115928713A CN 202211585597 A CN202211585597 A CN 202211585597A CN 115928713 A CN115928713 A CN 115928713A
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Abstract
The invention discloses an integrated corrosion-resistant sleeve for a steel pipe pile in a marine environment, which comprises corrosion-resistant paste, a corrosion-resistant belt, an EVA (ethylene vinyl acetate) buffer plate, an EVA adhesive tape and a glass fiber reinforced plastic armor; the anti-corrosion paste is sprayed on one surface of the anti-corrosion belt; the other side of the corrosion-resistant belt is attached to one side of the EVA buffer board, and the corrosion-resistant belt is connected with the EVA buffer board in an industrial sewing mode; the EVA buffer board is adhered to one surface of the glass fiber reinforced plastic armor by an EVA adhesive tape. The invention provides a novel simple corrosion prevention method for the marine steel pipe pile, which not only reduces a large amount of construction time and improves the working efficiency, but also saves a large amount of construction cost.
Description
Technical Field
The invention relates to the technical field of anticorrosive materials, in particular to an integrated anticorrosive sleeve for a steel pipe pile in a marine environment and a preparation method of the integrated anticorrosive sleeve.
Background
China is provided with a large number of facilities such as ports, wharfs and offshore wind power facilities. Taking wind power as an example, offshore wind power is used as clean energy, and the development is rapid in China due to the advantages of being close to power load, stable in power generation, free of land resource occupation and the like. In recent years, offshore wind power integration installed capacity continues to increase. According to data, the accumulated loading amount of offshore wind power in China in 2021 year is 2639 ten thousand kilowatts, and the equivalent increase is 193.2%.
The steel pipe pile of the offshore wind power is a foundation support of the wind power facility, and the corrosion and protection conditions of the steel pipe pile directly determine the durability and safety of the offshore wind power facility. The corrosion is an irreversible process, the thickness of the steel pipe pile is reduced by 1mm, and the structural strength is reduced by 5-10%. In the investigation on corrosion facilities of a plurality of steel pipe pile foundation structures in China, the problem that the steel pipe pile structures are corroded in a spray splashing area and a tidal range area is very common and serious, and the normal use and the safe operation of the facilities are directly influenced because the local corrosion is very serious in some cases within 3 years.
At present, the anti-corrosion method for the steel pipe pile in the splashing area and the tidal range area in the marine environment is mainly protected by heavy anti-corrosion coating, and coating anti-corrosion products are tried to be used during anti-corrosion maintenance of some wharf steel pipe piles or offshore wind power steel pipe piles.
(1) Heavy-duty anticorrosive paint
The marine corrosion prevention has high requirements on the coating, generally requires the protection period to be at least more than ten years, and belongs to the field of heavy corrosion prevention. Heavy-duty anticorrosive coatings are those which can be applied in a relatively severe corrosive environment compared with conventional anticorrosive coatings and have a longer protection period than conventional anticorrosive coatings. According to the difference of the material quality and corrosion mechanism of an anti-corrosion object, the marine heavy anti-corrosion coating can be divided into marine steel pipe pile anti-corrosion coating and non-steel pipe pile anti-corrosion coating. The marine steel pipe pile anticorrosive paint mainly comprises marine paint, container paint, anticorrosive paint for large facilities such as offshore bridges, wharf steel facilities, oil pipelines, offshore platforms, coastal and offshore wind power towers and the like. Generally, the coating is suitable for an ocean atmosphere region of an ocean structure, and can also be applied to a spray splash region and an ocean tide range region, the total thickness of the coating film generally exceeds 200 mu m, but the ideal anti-corrosion effect cannot be achieved in the spray splash region.
Taking the corrosion investigation condition of the steel pipe pile in the marine environment as an example, in a spray splashing area, a coating protection system adopted at present has a series of problems, long-acting corrosion prevention cannot be realized, maintenance is needed every 2-3 years, and the maintenance cost is very high. The coating in the area is very easy to damage under the influence of physical, chemical and biological effects such as seawater scouring, alternation of wetting and drying, marine organism adhesion and the like and field construction. The coating is when marine construction, and is higher to surface treatment and the requirement of humidity, temperature, salinity, therefore the protective effect is relatively poor, and the repeated maintenance also can greatly increased construction cost and personnel safety problem.
(2) Coated corrosion-resistant product
The corrosion prevention method using petrolatum coating as a corrosion prevention layer has a long history, and the method has been used for onshore piping and underground buried pipelines long before abroad. Petrolatum has good properties of adhesion, water insolubility, water repellency, non-volatility, electrical insulation, and the like. The anticorrosion material is prepared by adding corrosion inhibitor into petrolatum, adjusting to obtain product, and separating into paste, non-woven fabric strip impregnated with petrolatum, and semisolid state petrolatum filler.
The traditional petrolatum coating anticorrosion construction method comprises the following operation steps: firstly, a construction platform is built, then the surface of steel is treated, anti-corrosion paste is smeared, an anti-corrosion belt is wound, a baffle plate is installed, and an anti-corrosion protective cover and a fastening bolt are covered on the anti-corrosion protective cover and the fastening bolt after the anti-corrosion belt is wound. The inner side of the protective cover is stuck with a buffer material with the thickness of 0.5-1.5 cm. The protective cover must be treated at the end part, the gap between the protective cover and the upper steel pipe pile is sealed by curing epoxy resin in hands, and the lower part is fixed by a clamp to prevent the whole protective system from sliding off.
The marine environment is relatively complex, and offshore construction can face the following problems:
(1) The offshore construction and maintenance cost is high. Offshore construction is different from land construction, and is inconvenient. Marine corrosion protection operation requires ship auxiliary construction and personnel and equipment transportation, and is limited by construction conditions and requires installation of a special construction platform or diving operation, which all generate higher cost.
(2) The effective operation time on the sea is short. Wind power plants are generally far away from the shore, the time for taking a ship back and forth is about 2-5 hours, in addition, the marine climate change is measured in a changeable manner, the construction is influenced by the sudden change of wind and clouds in the afternoon all the time in a clear air morning, and the time for effective anticorrosion operation every day is short.
As mentioned above, the heavy anti-corrosion coating cannot solve the long-acting anti-corrosion purpose of the steel pipe pile in the splashing area and the tidal range area, the traditional coated anti-corrosion product has multiple working procedures during offshore construction, long operation time and high construction cost, the window period of the marine environment construction cannot meet the requirements of the existing product, the large problems exist, and new process improvement is urgently needed.
Therefore, providing an integrated coating anti-corrosion technology to effectively protect the steel pipe pile in the marine environment is a technical problem that needs to be solved urgently by the technical personnel in the field.
Disclosure of Invention
In view of the above, the invention provides an integrated anti-corrosion sleeve for a steel pipe pile in a marine environment and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
an integrated anticorrosion sleeve for a steel pipe pile in an ocean environment comprises anticorrosion paste, an anticorrosion belt, an EVA (ethylene vinyl acetate) buffer plate, an EVA adhesive tape and a glass fiber reinforced plastic armor;
wherein the anti-corrosion paste is sprayed on one surface of the anti-corrosion belt; the other side of the corrosion-resistant belt is attached to one side of the EVA buffer board, and the corrosion-resistant belt is connected with the EVA buffer board in an industrial sewing manner; the EVA buffer board is adhered to one surface of the glass fiber reinforced plastic armor by an EVA adhesive tape.
The integrated coating anti-corrosion technology (short for IT) provided by the invention is a unified whole formed by combining five protective layers which are closely connected, namely an anti-corrosion paste, an anti-corrosion belt, an EVA buffer board, an EVA adhesive tape and a glass fiber reinforced plastic armor. The anti-corrosion paste and the anti-corrosion belt can effectively prevent corrosive media from corroding the steel pipe pile, and can be constructed with water. The EVA buffer board and the EVA adhesive tape are soft and elastic, can enable the anti-corrosion paste and the anti-corrosion tape to be tightly attached to the surface of the steel pipe pile under the pressurization of external force, and can play a certain buffering role in impacting the glass fiber reinforced plastic armor by the external force. The glass fiber reinforced plastic armor has smooth and attractive surface and good impact resistance and ageing resistance.
Furthermore, a plurality of integrated corrosion-resistant sleeves of the marine environment steel pipe piles are adhered or sewn together to form a semicircular or fan-shaped structure in a unified shape when the corrosion-resistant paste, the corrosion-resistant belt, the EVA buffer plate, the EVA adhesive tape and the glass fiber reinforced plastic armor are processed and manufactured;
and a plurality of marine environment steel pipe piles are combined to form a cylindrical sleeve which wraps the marine environment steel pipe piles.
The glass fiber reinforced plastic armor is characterized by further comprising an ear-type clamping plate, wherein the ear-type clamping plate is bonded with the edge of the R corner of the glass fiber reinforced plastic armor through an EVA (ethylene vinyl acetate) adhesive tape; and a plurality of integrated corrosion-resistant sleeves of the marine environment steel pipe piles are connected through seawater corrosion-resistant bolts.
The integrated cladding anticorrosion technology (IT) is processed into two semicircular (or multi-fan type) structures during manufacturing, the edge of the R corner of each semicircular (or multi-fan type) structure is uniquely provided with an ear type clamping plate, the sealing performance is improved when the two semicircular (or multi-fan type) structures are folded and fastened conveniently, and the glass fiber reinforced plastic armor is transported to a construction site and is directly installed.
The invention also provides a preparation method of the marine environment steel pipe pile integrated anticorrosive sleeve, which comprises the following steps:
(1) Bonding the ear-type clamping plate with the R corner edge of the glass fiber reinforced plastic armor through the EVA adhesive tape, then bonding the corrosion-resistant belt with the EVA buffer plate, sewing by using an industrial sewing machine, bonding the sewn EVA buffer plate with the glass fiber reinforced plastic armor through the EVA adhesive tape, and spraying corrosion-resistant paste on the surface of the bonded corrosion-resistant belt;
(2) Removing rust layers on the surfaces of the steel pipe piles, and installing a plurality of processed integrated glass fiber reinforced plastic armour on the steel pipe piles, connecting and fixing to form the integrated marine environment steel pipe pile anticorrosion sleeve as claimed in any one of claims 1 to 3.
Furthermore, the glass fiber reinforced plastic armor and the ear-type clamping plate are formed by vertically and horizontally arranging and pasting unsaturated polyester resin and glass fiber materials.
Furthermore, the anti-corrosion paste is evenly sprayed on the surface of the anti-corrosion belt, and the thickness of the formed film is 200-260 mu m.
Furthermore, the anticorrosion paste is a gel anticorrosion material which is prepared by adding a composite antirust agent, a corrosion inhibitor, a thickening agent, a lubricant, a filler and the like into mineral grease serving as a raw material and can be well adhered to the surface of the steel pipe pile to be protected. The anti-corrosion paste contains a plurality of anti-rust and rust conversion components, and has good anti-corrosion performance in a humid environment. The rust converting agent in the anti-corrosion paste can react with rust to form an iron complex on the surface of steel, can convert a rust layer with the thickness of about 80 mu m into a stable compound, has the dual functions of rust removal and rust prevention, can reduce the requirement of surface treatment before construction, saves manpower and material resources, and reduces the cost.
TABLE 1 index of corrosion-resistant paste performance and detection method
Further, performance requirements of the corrosion resistant tape
The corrosion-proof belt is a belt-shaped corrosion-proof material made of composite fiber impregnated with a special corrosion-proof material. The corrosion-resistant material contained in the corrosion-resistant belt has components and performance similar to those of the corrosion-resistant paste, and can enhance the sealing performance and improve the overall strength and flexibility besides the corrosion-resistant effect. The carrier material of the corrosion-resistant belt is a composite fiber material, and the fibers of the corrosion-resistant belt are arranged into a three-dimensional structure by a method of forming a net by composite fiber filaments and consolidating the composite fiber filaments, and the corrosion-resistant belt is directly prepared by spinning and needling the consolidated composite fiber.
TABLE 2 index of corrosion prevention zone performance and detection method
Furthermore, the EVA buffer board is a board which is formed by using EVA rubber particles as a main raw material, adding auxiliary materials such as foaming agent and other additives through high-temperature foaming and compression molding. The EVA buffer board is generally installed in the interior of the glass fiber reinforced plastic armor in advance, and is a material with the functions of sealing and buffering external impact.
Furthermore, the EVA adhesive tape is manufactured by coating solvent type (or hot melt type) pressure-sensitive adhesive on two surfaces of EVA foam which is taken as a base material and then compounding release paper. Has sealing and shock absorbing effects. Has excellent sealing property, compression deformation resistance, flame retardancy, wetting property and the like.
Furthermore, the performance requirements of glass fiber reinforced plastic armor
The glass fiber reinforced plastic armor is a regular or irregular hard protective layer made of unsaturated polyester waterproof resin, glass composite fiber, high polymer material and the like.
TABLE 3 Performance index and detection method of glass fiber reinforced plastic armor
| Item | Index (I) | Detection method |
| Barkel hardness, hba | ≥35 | GB/T3854 |
| Flexural Strength, MPa | ≥100 | GB/T1449 |
| Content of resin (mass content)% | ≥48 | GB/T2577 |
| Water absorption percentage% | ≤0.5 | GB/T1462 |
| Tensile strength, MPa | ≥50 | GB/T1477 |
| Impact strength/(KJ/m) 2 ) | ≥150 | GB/T1451 |
The invention also provides a construction method of the marine environment steel pipe pile integrated anticorrosion sleeve, which comprises the following steps:
(1) installing a steel wire rope in a steel pipe pile area to be constructed, and then connecting the hanging basket with the steel wire rope through a chain block or an electric block to form a construction platform; (2) marine organisms, bubbling paint, rust blocks and the like attached to the surface of the steel pipe pile are removed completely by using a high-pressure water gun or an electric rust removal tool, and the St2 rust removal standard is required to be met. (3) After the surface is cleaned, a constructor firstly aligns and presses two processed semicircular (or multi-fan-shaped) integrated technical glass fiber reinforced plastic armors on the surface of the steel pipe pile, and the ear-type clamping plates are embedded into the other semicircular (or fan-shaped) glass fiber reinforced plastic armors and then are fastened together through seawater corrosion resistant bolts. (4) The clamping type hoop is installed on the lowest surface of the integrated glass fiber reinforced plastic armor, so that the glass fiber reinforced plastic armor is prevented from sliding downwards.
The invention has the beneficial effects that: the integrated anticorrosion technology (IT) provided by the invention provides a novel anticorrosion method and a simple installation method for anticorrosion of a splash zone and a tidal range zone of an ocean steel pipe pile. The invention processes the anti-corrosion paste, the anti-corrosion belt, the EVA buffer board, the EVA adhesive tape and the glass fiber reinforced plastic armor (including the ear-type clamping plate) into a unified whole according to the shape of a construction area in advance during factory manufacture. Six construction processes of the traditional coating type anticorrosion technology are reduced to two construction processes, so that the service life of offshore wind power is prolonged, 50% of construction time is shortened, the working efficiency is improved, more than 50% of construction cost is saved correspondingly, the value of the enterprise assets such as offshore wind power, port and wharfs is increased, and the enterprise corrosion protection and driving protection are realized.
Drawings
FIG. 1 is a schematic view of an integrated anti-corrosion sleeve structure of a semicircular marine environment steel pipe pile provided by the invention;
FIG. 2 is a schematic view of an integrated corrosion-resistant sleeve structure of a fan-shaped marine environment steel pipe pile provided by the invention
The structures shown by the reference numbers in the drawings are as follows: 1-anticorrosion paste, 2-anticorrosion belt, 3-EVA buffer board, 4-EVA adhesive tape, 5-ear type snap-gauge board, and 6-glass fiber reinforced plastic armor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
An integrated anticorrosion sleeve for a steel pipe pile in an ocean environment comprises anticorrosion paste, an anticorrosion belt, an EVA (ethylene vinyl acetate) buffer plate, an EVA adhesive tape and a glass fiber reinforced plastic armor;
wherein, the anti-corrosion paste is sprayed on one surface of the anti-corrosion belt; the other side of the corrosion-resistant belt is attached to one side of the EVA buffer board, and the corrosion-resistant belt is connected with the EVA buffer board in an industrial sewing mode; the EVA buffer board is adhered to one surface of the glass fiber reinforced plastic armor by an EVA adhesive tape.
In one embodiment, a plurality of integrated corrosion-resistant sleeves of the steel pipe pile in the marine environment are adhered or sewn together to form a semicircular or fan-shaped structure in a unified shape when the corrosion-resistant paste, the corrosion-resistant belt, the EVA buffer plate, the EVA adhesive tape and the glass fiber reinforced plastic armor are processed and manufactured;
a plurality of marine environment steel pipe pile integrated corrosion-resistant sleeves are combined to form a cylindrical wrapped marine environment steel pipe pile.
In another embodiment, the ear-type clamp plate is further included, and the ear-type clamp plate is bonded with the edge of the R corner of the glass fiber reinforced plastic armor through an EVA (ethylene vinyl acetate) adhesive tape; and the plurality of marine environment steel pipe pile integrated corrosion-resistant sleeves are connected through seawater corrosion-resistant bolts.
The preparation method of the integrated anti-corrosion sleeve of the steel pipe pile in the marine environment comprises the following steps:
(1) The ear-type clamp plate is adhered to the edge of the R corner of a semicircular (or fan-shaped) glass fiber reinforced plastic armor through an EVA (ethylene vinyl acetate) adhesive tape, then an anti-corrosion belt is attached to the EVA buffer plate, an industrial sewing machine is adopted for sewing, the sewn EVA buffer plate is adhered to the semicircular glass fiber reinforced plastic armor through the EVA adhesive tape, and then anti-corrosion paste is sprayed on the surface of the adhered anti-corrosion belt to form a film with the thickness of 200-260 mu m. (ii) a The glass fiber reinforced plastic armor and the ear-type clamping plate are both formed by vertically and horizontally staggered arrangement of unsaturated polyester resin and glass fiber materials and pasting;
(2) Removing rust layers on the surfaces of the steel pipe piles, and installing and connecting and fixing two processed semicircular (or multiple fan-shaped) integrated glass fiber reinforced plastic armour on the steel pipe piles to form the marine environment steel pipe pile integrated anticorrosion sleeve according to any one of claims 1 to 3.
EXAMPLE 2 construction method
2.1 build up construction work platform
(1) And designing and building auxiliary facilities or using tools according to the construction site conditions and the construction positions to create construction conditions. A common construction platform comprises hanging basket construction or floating barrel construction and ship auxiliary cooperation.
(2) The hanging point of the hanging basket is fixed on a structure which is cantilevered out of the top of the structure in the hanging basket construction, and the hanging basket is lifted through a simple lifting machine and a steel wire rope arranged on each hanging basket so as to meet the construction requirement.
2.2 surface treatment of Steel pipe pile
(1) Removing rust blocks, coatings with weak adhesion, marine organisms and the like on the surface of the steel pipe pile by adopting high-pressure water or an electric tool;
(2) The rust removal grade at least reaches St2 grade specified in GB/T8923.1-2011 and GB/T8923.2-2008. After treatment, the protrusions 10mm higher than the main steel pipe pile should not be formed.
2.3 installation integrated anticorrosion technology
And installing an integrated anti-corrosion glass fiber reinforced plastic armor within 6 hours after the surface of the steel pipe pile is cleaned. The lower end of the armor is closely connected to the hoop and is arranged from bottom to top. The flange joint should adopt the seawater corrosion resistant bolt fastening, and the bolt pitch-row should not be greater than 200mm.
2.4 mounting support clamp
And marking the position of the fixed support hoop at the lowest protection line of the steel pipe pile. The support clamp is arranged on the periphery of the protected steel pipe pile, 6-8 positions are uniformly selected for welding after the support clamp is connected and fixed by bolts, and the length of each welding line is larger than 1cm.
TABLE 4 comparison of IT integration anticorrosion technology with traditional coating anticorrosion technology
Remarking: the offshore wind power steel pipe pile with the diameter of 7 meters is used for anticorrosion repair, and the coating height is 7 meters.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (6)
1. An integrated anticorrosion sleeve for a steel pipe pile in an ocean environment is characterized by comprising anticorrosion paste, an anticorrosion belt, an EVA (ethylene vinyl acetate) buffer plate, an EVA adhesive tape and a glass fiber reinforced plastic armor;
wherein the corrosion-resistant paste is sprayed on one surface of the corrosion-resistant belt; the other side of the corrosion-resistant belt is attached to one side of the EVA buffer board, and the corrosion-resistant belt is connected with the EVA buffer board in an industrial sewing manner; the EVA buffer board is adhered to one surface of the glass fiber reinforced plastic armor by an EVA adhesive tape.
2. The marine environment steel pipe pile integrated corrosion prevention sleeve as claimed in claim 1, wherein a plurality of marine environment steel pipe pile integrated corrosion prevention sleeves are provided, and the corrosion prevention paste, the corrosion prevention tape, the EVA buffer plate, the EVA adhesive tape and the glass fiber reinforced plastic armor are adhered or sewn together to form a semicircular shape or a fan shape with a uniform shape during processing and manufacturing;
and a plurality of marine environment steel pipe piles are combined to form a cylindrical sleeve which wraps the marine environment steel pipe piles.
3. The marine environment steel pipe pile integrated anticorrosion sleeve as claimed in claim 1, further comprising an ear type clamping plate, wherein the ear type clamping plate is bonded with an R-corner edge of the glass fiber reinforced plastic armor through an EVA adhesive tape; and a plurality of integrated corrosion-resistant sleeves of the marine environment steel pipe piles are connected through seawater corrosion-resistant bolts.
4. A preparation method of an integrated anti-corrosion sleeve for a steel pipe pile in a marine environment is characterized by comprising the following steps:
(1) Bonding the ear-type clamping plate with the R corner edge of the glass fiber reinforced plastic armor through the EVA adhesive tape, then bonding the corrosion-resistant belt with the EVA buffer plate, sewing by using an industrial sewing machine, bonding the sewn EVA buffer plate with the glass fiber reinforced plastic armor through the EVA adhesive tape, and spraying corrosion-resistant paste on the surface of the bonded corrosion-resistant belt;
(2) Removing rust layers on the surfaces of the steel pipe piles, and installing a plurality of processed integrated glass fiber reinforced plastic armour on the steel pipe piles, connecting and fixing to form the integrated marine environment steel pipe pile anticorrosion sleeve as claimed in any one of claims 1 to 3.
5. The method for preparing the integrated anti-corrosion sleeve for the steel pipe pile in the marine environment according to claim 4, wherein the glass fiber reinforced plastic armor and the ear type clamping plates are formed by criss-cross arrangement and pasting of unsaturated polyester resin and glass fiber materials.
6. The method for preparing the integrated corrosion-resistant sleeve for the steel pipe pile in the marine environment according to claim 4, wherein the corrosion-resistant paste is uniformly sprayed on the surface of the corrosion-resistant belt, and the thickness of the formed film is 200-260 μm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211585597.1A CN115928713A (en) | 2022-12-09 | 2022-12-09 | Marine environment steel pipe pile integrated anti-corrosion sleeve and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211585597.1A CN115928713A (en) | 2022-12-09 | 2022-12-09 | Marine environment steel pipe pile integrated anti-corrosion sleeve and preparation method thereof |
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