TW201326518A - Method and apparatus for forming an anti-corrosion coating - Google Patents

Abstract

The present invention relates generally to a method for forming an anti-corrosion coating, in particular relates to a method for forming an anti-corrosion coating of piers as structural supports for wharf, in circumference around the pier installation of a cofferdam to isolate the sea water, then remove water from the cofferdam and to form a dry construction space, which can work inside to clean the pier surface, coat anti-corrosion materials on pier surface by using dry processes. This invention method provides the anti-corrosion coating on the surface of a pier having better adhesion and corrosion resistance, and can effectively inhibit pier from rust. The invention also discloses a kind of cofferdam construction for processing an anti-corrosion coating.

Description

Anti-corrosion coating construction method and device thereof

The invention relates to an anti-corrosion coating construction method, in particular to an anti-corrosion coating construction method for a steel pipe pile, which is provided with a cofferdam barrel around the surrounding steel pipe pile to isolate seawater, and then removes the seawater in the cofferdam barrel to form a The dry construction space can be used to remove the dirt on the surface of the steel pipe pile by dry method, and the anti-corrosion paint is applied on the surface of the steel pipe pile. The anti-corrosion paint film has better adhesion and corrosion resistance to the surface of the steel pipe pile, and can effectively inhibit the steel pipe. Corrosion of the pile and extension of the service life of the steel pipe pile.

The general port terminal platform extends into the sea surface and is supported by steel pipe piles deep in the sea water. The surface of the steel pipe pile under the water surface is subject to seawater erosion, especially the surface of the steel pipe pile within the height of the intertidal zone is more susceptible to erosion and erosion. Steel pipe piles endanger the safety of the dock platform. Therefore, the steel pipe piles of the dock platform must be regularly treated to prevent seawater erosion to ensure the structural safety of the dock platform. In addition, the pier platform at the riverside or the lake will also need to carry out anti-corrosion treatment of steel pipe piles. Similar situations may also occur in piers of bridges across the sea.

Regarding the existing steel pipe pile anti-corrosion engineering method, two conventional methods are disclosed in the patent specification of the Taiwan invention patent I329695 announced on September 1, 2010:

1. The waterproof waterstop is wrapped around the surface of the steel pipe pile. The waterstop is usually composed of an oil-containing cloth and a plastic film to isolate the surface of the steel pipe pile and seawater for corrosion prevention. This method is simple in material construction and easy to construct. However, the disadvantage is that the oil-containing cloth and the plastic film are not resistant to the waves and impacts, and the anti-corrosion has a short effective period, and the anti-corrosion effect must be re-constructed frequently;

2. The water-resistant epoxy resin anti-corrosive material is applied to the surface of the steel pipe pile. The construction method is to use a two-liquid water-resistant epoxy resin anti-corrosion material. After the constructor kneads the epoxy resin anti-corrosion material in his hands, Quickly sneak into the water to apply to the surface of the steel pipe pile by hand. Although the epoxy resin anti-corrosion material can effectively block the erosion of seawater, the disadvantage is that the wet anti-corrosion coating construction is difficult, especially due to the coating by hand coating. Uneven, some surfaces are easily peeled off, so the anti-corrosion effect is unstable, and the anti-corrosion effect must be re-constructed frequently.

At the same time, in order to solve the shortcomings of the above-mentioned steel pipe pile anti-corrosion engineering method, the above-mentioned Taiwan invention patent discloses a cofferdam anti-corrosion coating construction method for a steel pipe pile of a wharf platform, which is slightly: a steel pipe pile is surrounded by a cofferdam, and then a pumping pump is used. The seawater in the bucket is separated from the seawater to form a dry working space. The dry coating method is applied to the surface of the steel pipe pile evenly by the dry coating method. The hard and strong paint film can fully exert the anti-corrosion paint for the steel pipe pile. The adhesion and corrosion resistance of the surface.

With regard to the above-mentioned cofferdam anti-corrosion coating construction method, the invention patent also discloses a combined anti-corrosion coating cofferdam barrel, which is composed of two or more metal templates, wherein the lower end of the metal template is placed between the steel pipe pile and the steel pipe pile. The water-proof leakage elastic film also has an elastic film for preventing water leakage and leakage between the metal templates, and the elastic film is pressed when the metal template is fixed by the screw lock to form a water-tight and leak-proof cofferdam device. The metal formwork's cofferdam can resist the impact of the waves and effectively isolate the seawater, thus providing a safe dry working space for painting.

Although the patented technology can provide a safe dry working space for painting projects, the patented technology still faces many new problems, as explained below:

1. Since the cofferdam is composed of two or more metal stencils, the structure of the metal stencil must be resistant to the pressure of seawater and therefore must have sufficient mechanical strength. Therefore, the metal stencil must be made of thick metal sheet and its heavy metal sheet. The metal formwork is very heavy and not easy to move. Therefore, it is always necessary to use heavy machinery such as cranes to assist in assembling the cofferdams and increase construction costs.

2. Since the cofferdam is composed of a whole piece of metal formwork, its structure must be designed in accordance with the size of the steel pipe pile. Therefore, the shape and size of the metal formwork cannot be changed, and the volume and weight are both large and heavy, and it is very difficult to carry. The problem.

3. Especially because the entire metal formwork is affected by the impact of the waves, the metal formwork during the assembly of the cofferdam is affected by the wave fluctuations. The waves will cause the metal formwork to sway, and the swaying metal formwork Engineers who assemble in the water pose a hazard and have construction safety issues.

To sum up, the cost and safety problems faced by the existing cofferdam anti-corrosion coating construction method must not only pay higher assembly cost of the cofferdam, but also the diving personnel who assemble the cofferdam under water. High risk, therefore, it is necessary to propose a new steel pipe pile anti-corrosion coating construction method, and the structure of the cofferdam barrel must also be redesigned.

The main object of the present invention is to disclose an anti-corrosion coating construction method for a steel pipe pile, which uses a hollow cofferdam frame to surround the steel pipe pile to form a skeleton structure of the cofferdam barrel, and is sleeved on the cofferdam frame by using a waterproof rubber sleeve. A cofferdam is formed on the periphery to remove the surface of the corroded steel pipe pile after removing the water inside the cofferdam, and then the water-resistant anti-corrosive resin material is applied to the surface of the steel pipe pile, and finally the cofferdam is disassembled. Among them, the skeleton structure of the cofferdam is composed of a hollow cofferdam frame, and the hollow cofferdam frame not only requires less material but also lighter, and is easier to handle and construct, and the hollow frame is also easier. It will not be disturbed by sea water fluctuations and construction is safer.

Another object of the present invention is to disclose a cofferdam device for anti-corrosion coating of steel pipe piles, which is a cofferdam frame in which a plurality of cofferdam unit frames surround a steel pipe pile to form a hollow skeleton structure of a cofferdam barrel, wherein An appropriate distance is set between the cofferdam frame and the steel pipe pile, and the bottom port diameter is gradually reduced to the surface of the steel pipe pile, and a waterproof rubber sleeve is sleeved around the cofferdam frame, and the bottom end of the waterproof rubber sleeve is continuously wound with the waterproof tape to the steel pipe. The pile surface, the frame structure of the cofferdam barrel and the waterproof rubber sleeve are assembled into a cofferdam barrel.

Another object of the present invention is to disclose a waterproof rubber sleeve for assembling a bib bucket, which is a waterproof adhesive tape, and has a pair of waterproof zipper members on both sides of the waterproof adhesive tape, and a waterproof zipper member is used to connect the waterproof adhesive tape to form a hollow circle. The barrel-shaped waterproof rubber sleeve is used to surround the cofferdam frame structure of the cofferdam barrel to form a cofferdam barrel. The waterproof zipper as a joint design can quickly combine the waterproof rubber sleeves, thereby effectively improving the working efficiency of assembling the cofferdam barrel.

Another object of the present invention is to disclose a sealing and water stopping method between a bottom end of a cofferdam and a steel pipe pile, which is continuously wound around the bottom end surface of the waterproof rubber sleeve with a waterproof tape and extended to the surface of the steel pipe pile below, directly The waterproof tape is used as an extension of the waterproof rubber sleeve, which can deal with the difference between the bottom end of the cofferdam barrel and the surface of the steel pipe pile, simplify the sealing and water stopping construction, and effectively improve the working efficiency of the underwater engineering.

The invention mainly relates to an anti-corrosion coating construction method for a steel pipe pile, in particular to an anti-corrosion coating construction method for forming a dry construction space by using a cofferdam barrel to isolate seawater around the steel pile, as shown in Fig. 1, the anti-corrosion coating of the invention The construction steps of the construction example mainly include:

a. forming a cofferdam frame on the circumference of the steel pipe pile;

b. arranging a waterproof rubber sleeve on the periphery of the cofferdam frame to form a cofferdam;

c. remove the water inside the cofferdam;

d. remove the surface of the steel pipe pile;

e. applying a water-resistant anti-corrosive resin material to the surface of the steel pipe pile; and

f. Remove the cofferdam.

The following are the detailed construction steps for the anti-corrosion coating of steel pipe piles:

a. Forming a cofferdam frame on the circumference of the steel pipe pile

The cofferdam frame of the present invention is composed of a hollow metal frame, and the cofferdam frame is hollowed out, and the seawater around the steel pipe pile can easily flow on the cofferdam frame, so the fluctuation of the seawater only produces the cofferdam frame. a slight effect; there is a certain distance between the inner side of the cofferdam frame and the steel pipe pile, during which an anti-corrosion coating construction space can be formed, and the lower port of the cofferdam frame is radially reduced to the surface of the steel pipe pile, and the cofferdam frame is The lower end is locked on the surface of the steel pipe pile to fix the cofferdam frame on the steel pipe pile; in addition, the upper end of the cofferdam frame can also be provided with a plurality of fixed rods fixed on the surface of the steel pipe pile to assist the stability thereof, and can reduce the shaking of the upper end of the cofferdam frame.

b. Set a waterproof rubber sleeve on the periphery of the cofferdam frame to form a cofferdam

The waterproof tape is used to surround the periphery of the cofferdam frame, and the waterproof zipper is connected to the joint end of the waterproof tape. The waterproof tape forms an impervious cofferdam outside the frame of the cofferdam, and the cofferdam barrel can block the surrounding seawater. At the same time, a waterproof tape is wrapped around the lower end of the waterproof rubber sleeve, and the downward extension is continuously wound onto the surface of the steel pipe pile, so that the lower end of the cofferdam barrel and the steel pipe pile are tightly closed, and the seawater is blocked through the lower end of the cofferdam barrel and the steel pipe pile. The gap between them penetrates into the cofferdam.

c. Remove the water inside the barrel

The pumping water is used to remove the seawater in the cofferdam. Since the waterproof tape of the cofferdam barrel blocks the surrounding seawater, a dry working environment can be formed between the cofferdam and the steel pipe pile, in addition to facilitating careful inspection of the corrosion of the steel pipe pile. It is also conducive to the subsequent work of removing the corrosion of the steel pipe pile surface.

d. Remove the surface of the steel pipe pile

The surface of the steel pipe pile is corroded by the impact of the waves and the attachment of aquatic organisms for a long time. Before the anti-corrosion coating construction, the corrosion of the surface of the steel pipe pile must be removed, which is limited by the environment around the surface of the steel pipe pile. The tool for corrosion of the surface of the steel pipe pile always avoids the danger of using the electric tool to avoid leakage. However, the tool of the dry construction environment of the present invention can be selected without limitation, except that the surface of the steel pipe pile can be removed by using a wet water knife to use water. Dry construction methods such as knives, power tools, hand tools, or sand blasting remove rust, dirt, oil, or other contaminants from the surface of the steel pipe pile.

e. Applying water-resistant anti-corrosive resin material to the surface of steel pipe piles

The corrosion of the surface of the steel pipe pile is removed and coated with a water-resistant anti-corrosive coating. The anti-corrosion coating forms a protective film on the surface of the steel pipe pile to prevent further corrosion. The anti-corrosive coating mainly contains a resin material with anti-corrosion properties, and the anti-corrosive resin material It is selected from the group consisting of solvent-free epoxy resin coatings, solvent-free epoxy resin paints, elastic polyurethane resins, water-hardened epoxy resin coatings or water-hardened epoxy resin composites.

f. Disassemble the cofferdam

The anti-corrosive resin material on the surface of the steel pipe pile can be used to dismantle the cofferdam after the protective film is formed. First, the waterproof rubber sleeve of the cofferdam is removed, and the cofferdam barrel is removed after the waterproof rubber sleeve is removed, and the hollow cofferdam frame is received. The impact of the fluctuating seawater is small, so the sway of the cofferdam frame is also small, which can increase the safety of dismantling the cofferdam.

The anti-corrosion coating construction method of the steel pipe pile of the invention adopts the cofferdam frame and the waterproof rubber sleeve to form the cofferdam barrel to isolate the seawater around the steel pile, in addition to forming a dry construction space, the fine anti-corrosion coating can be carried out, As a skeleton of the cofferdam, the cofferdam frame is not subject to the fluctuation of seawater and produces a strong swing. It is more stable and safer than the conventional method in combination or disassembly.

The cofferdam of the invention is applied to the anti-corrosion coating project of the steel pipe pile in the water, the water around the cofferdam is isolated, and an anti-corrosion coating construction space is formed between the inner side of the cofferdam and the steel pipe pile, including: The 堰 frame, which is surrounded by the steel pipe pile and has a hollow skeleton structure, forms an anti-corrosion coating construction space with the steel pipe pile, wherein the mouth of the lower end of the cofferdam frame is radially reduced to the surface of the steel pipe pile; and a waterproof rubber sleeve, The sleeve is sleeved on the periphery of the cofferdam frame, and extends downwardly to cover the surface of the steel pipe pile at the lower end of the cofferdam frame.

The structure of the cofferdam barrel of the present invention is formed by using a waterproof rubber sleeve to cover the metal frame to form a cofferdam barrel. The steel pipe pile anti-corrosion coating construction method used in the prior art uses a steel plate structure cofferdam barrel to isolate seawater, in combination or disassembly. When the steel plate of the bucket is impacted by the seawater, the area of the steel plate is very large, so that the seawater fluctuates and the violent oscillation occurs, which is dangerous to the safety of the engineering personnel. Therefore, the present invention is formed by using a waterproof rubber sleeve to cover the hollow metal frame. The separate structure design of the cofferdam can significantly improve the safety of construction.

As for the cofferdam frame, as shown in FIG. 2, it is composed of two hollow metal frame bodies 21, and the mouth of the lower end 22 of the metal frame body 21 is radially reduced to the surface of the steel pipe pile, and the two metal frame bodies 21 are The side is respectively provided with a hinge connecting member 23 and a side connecting member 24, and the end portion of the lower end 22 of the metal frame is provided with a lower end connecting member 25, wherein the hinge connecting member 23 can first connect the two metal frame 21 into a temporary cofferdam frame. In addition, in order to increase the buoyancy of the water frame, in order to increase the buoyancy of the cofferdam frame, the metal frame at the upper end can be made of a metal pipe of a larger diameter and filled with a foaming material, or connected with other buoyancy devices such as a float ball; The 堰 frame can also be formed by a plurality of unit metal frame bodies. However, how to use the different unit metal frame to form the cofferdam frame design is a mature technology of metal parts, and all the frameworks can be assembled. Used in the present invention.

When the cofferdam frame is combined, as shown in FIG. 3, the steel pipe pile 32 supporting the dock platform 31 is deep into the water, and the cofferdam frame 33 is to be hung from the dock platform 31 to the steel pipe pile 32 in the water, and is closed around the steel pipe pile 32. The side joint member 34 of the dam frame 33 is locked with the side joint member 34 by the screw lock 341, the lower end joint member 35 of the dam frame 33 surrounds the steel pipe pile, and the dam frame 33 is fixed to the steel pipe pile 32. In the cofferdam frame locking method, in addition to the screw lock member, other quick snap lock methods such as a C-type fixing clip or a quick clamp can be used; if necessary, an elasticity can be added between the steel pipe pile and the lower end connecting member 35. The cushioning member can protect the surface of the steel pipe pile in addition to the water stop; compared with the conventional steel plate structure, the force-receiving area of the hollow cofferdam frame used in the invention is obviously much smaller than that of the conventional steel plate structure, so that it is relatively free from seawater fluctuations. Affect its stability.

Regarding the waterproof rubber sleeve, as shown in FIG. 4, the waterproof rubber sleeve is wrapped around the cofferdam frame 41, wherein the waterproof rubber sleeve is composed of one or a plurality of waterproof adhesive tapes 42, and the upper end of the cofferdam frame is provided with a plurality of hooks 43 The upper end of the waterproof tape is provided with a corresponding hanging ring (unmarked). When the waterproof rubber sleeve is covered, the waterproof tape surrounds the outer frame of the cofferdam and the hanging ring at the upper end of the waterproof tape is placed on the hook 43 of the frame to make the waterproof glue. The sleeve is naturally suspended, and the method is particularly convenient for the large-sized cofferdam. The waterproof tape is provided with a pair of waterproof zippers 44 on both sides. After the waterproof tape 42 surrounds the periphery of the cofferdam frame 41, the waterproof zipper is connected with the waterproof tape 42. A stern barrel, wherein the tightness between the stern barrel and the steel pipe pile is wrapped around the surface of the waterproof rubber sleeve 42 by a waterproof tape 45, and extended to the surface of the steel pipe pile under the waterproof rubber.

The waterproof rubber sleeve of the invention can adopt the PVC mesh cloth composed of the polyvinyl chloride mask and the polyester fiber fabric as the waterproof adhesive cloth, and has the characteristics of waterproof, abrasion resistance, high strength, impact resistance and cold resistance, and the waterproof rubber sleeve is adopted. PVC mesh cloth has been widely used for inflatable cushions or rubber boats, because inflatable cushions or rubber boats must also have waterproof, high strength, anti-wear and other characteristics, of course, regardless of single or double-sided PVC mesh cloth, or other Non-PVC type mesh cloths are suitable for the present invention as long as they have waterproof, high strength, abrasion resistance and the like.

Regarding the assembly example of the cofferdam of the present invention, as shown in FIG. 5, a sill frame 52 is placed around the steel pipe pile 51, and a waterproof rubber sleeve 53 is coated on the periphery of the dam frame 52, and the waterproof rubber sleeve 53 is made of a waterproof zipper 54. The joint forms a cofferdam, the cofferdam can isolate the seawater, and the seawater in the cofferdam is removed to form a dry construction space between the cofferdam and the steel pipe pile; in addition, a plurality of fixed rods can be added to the upper end of the cofferdam frame The fixing rod 55 is fixed on the surface of the steel pipe pile, and the fixing rod 55 can reduce the shaking of the upper end of the cofferdam frame to assist the stability of the cofferdam barrel. At the same time, the upper end of the upward fixing rod 55 is fixed upward at the top of the steel pipe pile 51 or upwardly against the pier. At the bottom of the platform, it is possible to avoid the problem that the cofferdam is lifted up by the buoyancy of the seawater.

twenty one. . . Cofferdam frame

twenty two. . . Bottom of the cofferdam frame

twenty three. . . Hinged link member

twenty four. . . Side joint member

25. . . Lower end connecting member

31. . . Terminal platform

32. . . Steel pipe pile

33. . . Cofferdam frame

34. . . Side joint member

341. . . Screw lock

35. . . Lower end connecting member

351. . . Screw lock

41. . . Cofferdam frame

42. . . Waterproof tape

43. . . Hook

44. . . Waterproof zipper

45. . . Waterproof tape

51. . . Steel pipe pile

52. . . Cofferdam frame

53. . . Waterproof rubber sleeve

54. . . Waterproof zipper

55. . . Fixed rod

Figure 1 illustrates the main construction steps of the anti-corrosion coating construction method of the present invention.

Figure 2 illustrates an example of a cofferdam frame of the present invention.

Figure 3 illustrates the assembly of the cofferdam frame of the present invention around a steel pipe pile below the dock platform.

FIG. 4 illustrates a waterproof rubber sleeve and a bottom end waterproof tape of the cofferdam barrel frame of the present invention.

Figure 5 illustrates that the dam barrel of the present invention is secured around a steel pipe pile.

Claims (17)

An anti-corrosion coating construction method comprises the following steps: a: forming a cofferdam frame on the circumference of the steel pipe pile; b arranging a waterproof rubber sleeve on the periphery of the cofferdam frame to form a cofferdam; c removing water inside the cofferdam; d Remove the surface of the steel pipe pile; e Apply a water-resistant anti-corrosive resin material to the surface of the steel pipe pile; and f Disassemble the cofferdam. For example, in the anti-corrosion coating construction method of claim 1, the construction space of the anti-corrosion coating is formed between the inner side of the cofferdam and the steel pipe pile, and the diameter of the lower end of the cofferdam frame is reduced to be close to the surface of the steel pipe pile. For example, in the anti-corrosion coating construction method of claim 1, wherein the cofferdam frame is formed by a plurality of unit frames. For example, in the anti-corrosion coating construction method of claim 1, wherein the waterproof rubber sleeve is composed of one or a plurality of waterproof adhesive tapes, and the waterproof adhesive tape is provided with a pair of waterproof zippers on both sides, and the waterproof adhesive tape surrounds the periphery of the cofferdam frame. Waterproof zipper is connected by waterproof zipper. For example, in the anti-corrosion coating construction method of claim 1, the adhesion between the cofferdam and the steel pipe pile is wound with a waterproof tape on the surface of the waterproof rubber sleeve, and extended to the surface of the steel pipe pile under the waterproof rubber. For example, in the anti-corrosion coating construction method of claim 1, in which the surface of the steel pipe pile is removed, the surface of the steel pipe pile is rust, dirt and grease by using a water jet, sand blasting, electric grinding tool, pneumatic grinding tool or manual grinding tool. Or other impurities are removed. For example, the anti-corrosion coating construction method of the first application of the patent scope, wherein the anti-corrosion coating of the steel pipe pile uses a wet waterjet treatment method to remove the surface of the steel pipe pile. For example, in the anti-corrosion coating construction method of claim 1, the anti-corrosion coating of the steel pipe pile uses a dry blasting method to remove the surface of the steel pipe pile. For example, in the anti-corrosion coating construction method of claim 1, wherein the anti-corrosive resin material is selected from the group consisting of a solventless epoxy resin coating, a solventless epoxy resin paint, an elastic polyurethane resin, and a water hardening ring. Anti-corrosive coatings such as oxy-resin coatings or hardened epoxy resin composites in water. The utility model relates to a cofferdam barrel, which is applied to the anti-corrosion coating project of the steel pipe pile in the water, the water surrounding the cofferdam barrel is isolated, and an anti-corrosion coating construction space is formed between the inner side of the cofferdam barrel and the steel pipe pile, including: a cofferdam frame The steel pipe pile is surrounded by a hollow skeleton structure, and an anti-corrosion coating construction space is formed between the steel pipe pile, wherein the bottom end of the cofferdam frame is radially reduced to a surface close to the steel pipe pile; and a waterproof rubber sleeve is set. The outer surface of the cofferdam frame and the lower end of the cofferdam frame extend downward to cover the surface of the steel pipe pile. For example, the cofferdam barrel of claim 10, wherein the cofferdam frame is formed by a plurality of unit frames. For example, the cofferdam barrel of claim 10, wherein the cofferdam frame is formed by two symmetrical metal frames. For example, in the cofferdam of claim 10, the lower end of the cofferdam frame is provided with a lower end connecting member, and the cofferdam frame is fixed on the steel pipe pile by a screw lock or other quick snap locking method. For example, in the cofferdam barrel of claim 10, the upper end of the cofferdam frame is provided with a plurality of fixing rods, and the upper end of the fixing rod is fixed at the top of the steel pipe pile or the bottom of the dock platform. For example, in the cofferdam barrel of claim 10, the upper end of the cofferdam frame is provided with a plurality of hooks, and the upper end of the waterproof tape is provided with a corresponding hanging loop. For example, in the cofferdam barrel of claim 10, wherein the waterproof rubber sleeve is composed of one or a plurality of waterproof tapes, the waterproof tape is provided with a pair of waterproof zippers on both sides, and the waterproof tape surrounds the periphery of the cofferdam frame, and is waterproofed. The zipper is connected to a waterproof tape. For example, in the cofferdam barrel of claim 10, the water stop at the lower end of the cofferdam is wrapped with a waterproof tape to the surface of the waterproof rubber sleeve, and extended to the surface of the steel pipe pile under the waterproof rubber.