KR20110014377A - Polycarbonate form for lining anti-corroding moltal on marine steel pile - Google Patents

Abstract

PURPOSE: A polycarbonate form for applying mortar for preventing a steel pipe pile from becoming corroded is provided to enable thinner and more uniform coated part to be formed to prevent the corrosion of the steel pipe pile, to minimize the separation or the cracking due to the deformation or the movement of the steel pipe pile and to enable an installation work to be easily performed. CONSTITUTION: A polycarbonate form(100) for applying mortar for preventing a steel pipe pile from becoming corroded comprises a body(110), a horizontal sealing portion(120), a coupling portion(130), a water discharge portion(140), a corrosion-preventing mortar injecting portion(150) and an air intake/exhaust portion(160). The body is formed from polycarbonate. The horizontal sealing portion comprises a gap member and a horizontal watertight member. The gap member forms a gap between the body and a steel pipe pile(11). The horizontal watertight member seals the body to the steel pipe pile. The coupling portion comprises a vertical watertight member and a reinforcing member.

Description

POLYCARBONATE FORM FOR LINING ANTI-CORRODING MOLTAL ON MARINE STEEL PILE}

The present invention relates to a polycarbonate formwork for marine steel pipe pile anti-corrosion mortar coating for preventing corrosion of the marine steel pipe pile portion is repeated in the sea water due to the difference between tidal water.

There are various offshore structures such as port structures, offshore bridges, transportation facilities, offshore docks or offshore parks. These offshore structures are generally equipped with columns to support the structure. As described above, the pillars installed to support the offshore structure may use concrete structures but use piles made of steel pipes in consideration of ease of construction and lifespan.

In the case of using the steel pipe pile, the marine steel pipe structure 10 as shown in Figure 1 is installed so that the steel pipe pile 11 is fixed to the bottom of the seabed to support the structure of the upper portion. In this case, the offshore structure is divided into depths in the direction of the sea in terms of corrosion, the sea portion, the splash portion, the tidal portion, the seawater portion, and the undersea portion.

The natural corrosion rate of each part is about 0.128mm per year for the sea atmospheric part, about 0.272mm per year for the small area, about 0.083mm per year for the tidal area, about 0.090mm per year for the seawater, and about 0.090mm per year for the seabed It was found to corrode about 0.075 mm. That is, the droplets with sufficient oxygen supply are particularly corrosive, and among them, the corrosion rate is known to be the highest at the upper portion of the high water level (H.W.L). Therefore, it can be seen that a method for preventing corrosion applied to the upper part of the tidal belt is very important.

In this case, the steel pipe pile (11) should be applied to the anticorrosive structure of the splash portion of the steel pipe pile (11) in order to prevent corrosion by sea water. As an anticorrosion technique applied to the marine steel pipe pile 11, an electric anticorrosion technique and a painting and dress anticorrosion technique are known. Painting and dressing techniques are applied to more than tidal areas, which are submerged by seawater (A), and it is common to apply electric type techniques to the central part (B) and the submarine soil part.

Painting and dressing techniques are known as coating, inorganic lining, and organic lining. Among them, mortar lining technology is most widely applied, but there are technical problems, and thus, petrolatum method, which is a kind of coating method and organic lining method, has advantages in convenience and economic efficiency.

However, the coating and organic lining method has a problem that the adhesion performance due to the water film is degraded due to the use of the organic material, the rust transfer. In addition, since the material to be applied is made of the use of VOC material thinner and anhydrous alcohol and petrochemical products, not only pollution and environmental problems but also work hazards in use.

In order to solve such a problem, the technique which improved the mortar lining method again in recent years is developed. To summarize the mortar lining method, formwork is installed outside the steel pipe and about 10 ~ 15cm apart, and the cement mortar or concrete is poured between the steel pipe and the formwork to form a sheath, and the formwork is removed or left as it is. . In this case, the formwork is mainly used FRP (Fiber-glass Reinforced Plastic).

In the case of such a mortar lining method, the water film can be removed by water, and the main material is inorganic and does not use VOC (Volatile Organic Compounds). You can prevent it.

However, as a disadvantage, since the coating thickness is heavy, the construction is more difficult in an environment in which external factors such as blue work due to the heavy weight. In addition, when the deformation of the steel material is generated, since it is separated from the steel pipe pile, durability is weak, and maintenance is difficult. In addition, there is a problem that dry shrinkage occurs in the curing process to cause cracks. In this case, the method of leaving steel formwork is applied to prevent cracking, but since the steel formwork is also exposed to splash bands, the corresponding method should be applied additionally. On the other hand, although a formwork made of FRP material is used, the film having a uniform thickness cannot be formed because the bending rigidity is weak.

The CRUS method is known as another technology of the lining method, which welds steel bars on the outer surface of steel pipes and reinforces them, and installs formwork to cast non-shrink mortar between the formwork and the steel pipes. This process can overcome the disadvantages of the previous mortar lining, but has the disadvantages of difficulty in workability and lack of economics.

Thus, in the case of lining using concrete, the passivation film is formed on the surface of the steel by the alkali property of mortar, and the thickness of the mortar is due to weathering of mortar due to salt permeation, neutralization, impact of driftwood, etc. Considering the back should be 10-15cm. Due to this, there are disadvantages in that construction is difficult and disadvantageous in terms of economics.

Therefore, there is a continuous demand for the development of a method that can be sufficiently supported for the construction and maintenance, while also having sufficient durability for the method of the steel pipe pile, and can fully support the economics.

The present invention is made by recognizing at least any one of the needs or problems arising in the construction for forming a mortar coating for preventing corrosion in the steel pipe pile of the conventional offshore structure as described above.

One object of the present invention is to compensate for the physical and chemical instability of the polycarbonate material to be able to form a thinner and more homogeneous mortar coating for corrosion protection of marine steel pipe piles.

Another object of the present invention is to allow the mortar coating for corrosion prevention to be applied more thinly so that the peeling or cracking can be suppressed to the maximum when the steel pipe pile behaves by deformation or wave.

Another object of the present invention is to enable the formwork for forming a mortar coating for corrosion protection of the steel pipe pile to be made lighter so that the installation can be made easier.

Still another object of the present invention is to form a form even after forming a coating for preventing corrosion of the steel pipe pile to minimize the damage caused by external impacts such as ships or floats, a separate construction for the form of the formwork This is not required.

Another object of the present invention is to enable the formation of a thinner mortar coating, and to minimize the constraints of reducing the thickness of the mortar coating due to the flow of mortar.

Another object of the present invention is to form a thinner mortar coating to enable an anticorrosive structure while minimizing the use of expensive mortar.

The polycarbonate formwork for marine steel pipe pile anti-corrosion mortar coating according to an embodiment for realizing at least one of the above problems may include the following features.

Basically, the present invention is based on being configured to make the mortar coating for corrosion prevention of offshore steel pipe piles thinner and more homogeneous by supplementing physical and chemical instability problems of polycarbonate materials.

Polycarbonate formwork for marine steel pipe pile anti-corrosion mortar coating according to an embodiment of the present invention is made of a polycarbonate flat structure, the outer surface is coated with a protective film made of a neutral material or an acrylic material, the two ends facing each other Formwork body provided with a coupling end is bent; A vertical watertight member provided on a surface where each coupling end is in contact with each other; A reinforcing member provided on the other side of the coupling end facing the vertical watertight member; A gap member coupled to the upper and lower sides of the form body based on a state in which the form body is wound on the steel pipe pile so that a narrow constant gap is formed between the inner surface of the form body and the outer surface of the steel pipe pile; A horizontal watertight member coupled to the upper and lower ends of the formwork body adjacent to the pole electrode member; It may be configured to include; a domestic water discharge portion, corrosion prevention mortar injection portion and the air intake and exhaust portion provided in the form body.

In this case, the protective film coated on the form body is formed of an acrylic primary film on the outer surface in contact with seawater and the inner surface in contact with the anti-corrosive mortar, the inner surface of the polyethylene resin (PET: Polyethylen Terephthalate), The secondary membrane may be formed by bonding a sheet made of polypropylene resin (PP: Polypropylene) or vinyl.

And, the gap member is a gap holding portion coupled along the upper, lower side of the formwork body; An auxiliary horizontal watertight portion may be further provided extending from the gap holding portion in a direction in contact with the steel pipe pile.

On the other hand, the coupling end of the formwork body, the vertical watertight member and the reinforcing member is formed with a fastening hole connected to each other, the fastening hole of the coupling end is larger than the fastening hole formed in the vertical watertight member and the reinforcing member, the fastening member is It may be configured not to be in contact with the fastening hole of the engaging end.

In addition, the outer end of the vertical watertight member and the reinforcing member is configured to protrude more than the outer end of the coupling end of the form body, the outer end of the coupling end is further provided with a shock absorbing member for blocking the shock transmitted to the coupling end from the outside May be

In addition, the reinforcing member may be made of a flat plate structure or an angle structure. In addition, the form body may be further provided with a reinforcing band in the outer lower end region in contact with the sea water.

In addition, the water discharge portion, the anti-corrosion mortar injection portion and the air intake and exhaust portion is connected to the hole formed in the formwork body from the inside, the connecting member is coupled to the coupling member is configured, between the hole formed in the formwork body and the connection member The sealing member may be configured to be inserted.

On the other hand, the vertical watertight member and the reinforcing member may be joined to the coupling end of the formwork by a joining member made of an elastic material. In this case, the joining member to which the reinforcing member is joined may be formed to a thickness capable of blocking external impact.

As described above, according to the present invention, the physical and chemical instability problems of the polycarbonate material can be compensated for, and the mortar coating for preventing corrosion of the marine steel pipe pile can be formed in a thinner and homogeneous state.

In addition, according to the present invention, it is possible to apply the mortar coating for the corrosion prevention thinner to be able to suppress the occurrence of peeling or cracking at the time of the behavior due to deformation or wave of the steel pipe pile.

In addition, according to the present invention, the formwork for forming a corrosion-resistant mortar coating of the steel pipe pile can be made lightweight, so that the installation can be made easier.

In addition, according to the present invention, even after forming the mortar coating for corrosion protection of the steel pipe pile formwork can be maintained to minimize the damage caused by the external impact caused by the ship or float.

In addition, according to the present invention, it is possible to prevent a separate construction for the form of the formwork for the existing formwork.

In addition, according to the present invention, it is possible to form a thinner mortar coating, and due to the fluidity of the mortar, it is possible to minimize the constraints on reducing the thickness of the mortar coating.

In addition, according to the present invention, since the mortar coating is made thinner, the use of expensive mortar can be reduced as much as possible, thereby increasing the economic efficiency.

In order to help the understanding of the features of the present invention as described above, it will be described in detail with respect to the polycarbonate form for coating the marine steel pipe pile anti-corrosive mortar according to the embodiment of the present invention.

Hereinafter, exemplary embodiments will be described based on embodiments best suited for understanding the technical characteristics of the present invention, and the technical features of the present invention are not limited by the illustrated embodiments, It is to be understood that the present invention may be implemented as illustrated embodiments. Accordingly, the present invention may be modified in various ways within the technical scope of the present invention through the embodiments described below, and such modified embodiments fall within the technical scope of the present invention.

In order to facilitate understanding of the embodiments to be described below, in the reference numerals shown in the accompanying drawings, among the constituent elements which perform the same function in each embodiment, the related constituent elements are indicated by the same or an extension line number.

Embodiments related to the present invention are basically based on being configured to compensate for the physical and chemical instability of the polycarbonate material to form a thinner and more homogeneous coating for preventing corrosion of the marine steel pipe pile.

2 shows a polycarbonate formwork 100 for corrosion protection of mortar coating corrosion resistant steel pipe according to an embodiment of the present invention.

The polycarbonate formwork for corrosion protection mortar coating of the marine steel pipe pile according to an embodiment 100 is formed so that the corrosion protection mortar for corrosion protection of the steel pipe pile (11) to a thickness of about 10mm or less and as uniform as possible. The body 110 is made of polycarbonate.

Physical properties of the non-metallic material reconstituted with the polycarbonate and other conventional formwork constituting the formwork body 110 according to an embodiment of the present invention are shown in the following table.

Resin Type importance Flexural strength
(kgf / cm ² ) % Elongation Impact strength
(kgf / cm ² ) combustibility acryl 1.17-1.20 840 2.0 1.6 Self-extinguishing PVC 1.25-2.30 700 40.0 2.2 Self-extinguishing FRP 1.35-2.30 700 0.5 13.5 Self-extinguishing Polycarbonate 1.20 950 90.0 75.0 Flammability

As shown in the above table, the polycarbonate can be seen that the strength, specific gravity, and temperature are excellent when compared with other formwork materials, and in particular, the impact strength is excellent.

That is, when the formwork is made of polycarbonate, it may be possible to coat the anti-corrosion mortar thinly and homogeneously for the anticorrosion on the droplet of the steel pipe pile (11). In other words, the anti-corrosion mortar must be injected at a significant pressure to be injected between the narrow gaps between the steel pipe pile 11 and the polycarbonate formwork 100, and the larger the droplet area of the coated steel pipe pile 11 is, Great pressure should be applied

In this case, the form made of FRP is difficult to form a thin and homogeneous film of less than 10mm due to the phenomenon that the lower region is swollen by pressure during injection of the corrosion-resistant mortar, the polycarbonate formwork 100 is like a steel formwork Due to the high flexural rigidity, a thin, homogeneous film of less than 10 mm in total can be formed.

On the other hand, since the polycarbonate formwork 100 is not required for another formwork for the formwork unlike the steel formwork and the impact strength is also equivalent to the steel formwork, the polycarbonate formwork is maintained in the state installed in the steel pipe pile 11 to prevent corrosion It is possible to protect the coating.

However, since the polycarbonate is a physically or chemically unstable material, it is a material that is difficult to handle, but may be configured as a formwork easy to install while maintaining the advantages of the polycarbonate as in the embodiments described below.

2 and 3, the polycarbonate formwork 100 according to one embodiment of the present invention is installed to surround the steel pile 11 is configured to be injected mortar for corrosion protection. In this case, the polycarbonate formwork 100 is simply wrapped around the steel pile 11 so that the installation can be made more easily, so that the end is fastened so that the installation can be made.

For example, the polycarbonate formwork 100 may have a formwork body of which the formwork body 110 is made of polycarbonate. In addition, a protective film may be coated on the planar region of the form body 110 to prevent the form body 110 made of polycarbonate from being damaged by alkali or acidic material.

In this case, the protective film coated on the outer surface of the form body 110 may be made of a neutral material or an acrylic material.

For example, when the form body 110 is installed to surround the steel pipe pile 11, the outer surface in contact with the sea water and the inner surface in contact with the anti-corrosion mortar injected into the polycarbonate formwork 100 An acrylic primary film is formed. In addition, a sheet made of polyethylene resin (PET: Polyethylen Terephthalate), polypropylene resin (PP: Polypropylene) or vinyl is bonded to the inner surface of the form body 110 in contact with the anti-corrosion mortar using an acrylic adhesive. To form a secondary film.

As shown in FIG. 1, while the polycarbonate formwork 100 is provided with a steel pipe pile 11, a narrow constant gap is formed between an inner surface of the form body 110 and an outer surface of the steel pipe pile 11. In order to seal, horizontal sealing parts 120 may be formed at both ends of the form body 110.

As shown in FIGS. 4A and 4B, the horizontal sealing part 120 includes a gap member 122, the form body 110, and the steel pipe for forming a predetermined gap between the form body 110 and the steel pipe pile 11. It may include a horizontal watertight member 121 for sealing between the pile (11).

That is, in order to form a constant gap between the formwork body 110 and the steel pipe pile 11, the gap member 122 has upper and lower side surfaces based on a state in which the formwork body 110 is wound on the steel pipe pile 11. Combined along. In this case, the gap member 122 may be formed such that a gap between the formwork body 110 and the steel pipe pile 11 is about 1-10 mm. In this case, the thickness of the gap member 122 may be selected so that the coating is formed to a thickness of about 5 mm or more, depending on the fluidity or required thickness of the anti-corrosion mortar to be injected.

On the other hand, the gap member 122 may be configured such that the coupling is made in the state fitted to the upper and lower side (that is, the edge of the end) of the die body (110). In this case, the gap member 122 may be configured as a buffer member having a small strain rate so that the shock is prevented from being transmitted to the upper and lower side surfaces of the form body 110. On the contrary, the gap member 122 may be formed of a member having high strength and hardness, and a buffer member may be inserted between the gap member 122 and the upper and lower ends of the form body 110.

As shown in FIG. 4A, the gap member 122 may be provided such that the auxiliary horizontal watertight portion 122b extends in the inward direction (the direction in contact with the steel pipe pile) from the gap holding portion 122a. On the other hand, as shown in Figure 4b, the gap member 122 may be configured to be simply fitted to the upper, lower ends of the form body 110.

In this case, when the auxiliary horizontal watertight portion 122b is in close contact with the outer surface of the steel pipe pile 11, a hole (not shown) may be further formed therein so that compression deformation may occur and sealing may be performed.

On the other hand, the horizontal watertight member 121 is provided at the upper and lower ends of the form body 110 adjacent to the gap member 122, the form body 110 and the steel pipe pile by the gap member 122 ( 11) The gap formed between them is sealed to block the outside. In this case, the horizontal watertight member 121 may be configured to have a stretch force of about 30-80%.

Through the above configuration, the gap formed between the formwork body 110 and the steel pipe pile 11 is substantially formed by the gap member 122, and the gap formed between the formwork body 110 and the steel pipe pile 11 is formed. The seal is made by the horizontal watertight member 121.

As shown in Figure 3, the formwork body 110 is provided at both ends is provided with a coupling portion 130 to form a watertight structure in the vertical direction to be configured to be coupled in a state surrounding the steel pipe pile (11) Can be.

As an example of the configuration of the coupling portion 130, both ends of the formwork body 110 facing each other may be bent to form a coupling end 111 having a flange-like structure. In this case, the coupling end 111 may be configured to be fixed by the fastening member 136 in contact with each other. For example, the coupling end 111 may be provided with a fastening hole 111a, and may be configured to be provided to the coupling force by a fastening member 136 formed of a bolt 136a and a nut 136b. Alternatively, a coupling force may be provided to the fastening member 136 of a generally known clamping structure.

In this case, as shown in Figures 5a to 5c, one surface of the coupling end portion 111 is provided with a vertical watertight member 132 on each surface where the two coupling end portions 111 are in contact with each other watertight structure Can be configured to be made.

In this case, a reinforcing member 131 may be further provided on the other surface of the coupling end 111 to face the vertical watertight member 132 with the coupling end 111 therebetween. The reinforcing member 131 may be made of a flat plate structure, or may be made of an angle structure. The reinforcing member 131 is made by the coupling unit 136 when the two coupling end portions 111 of the formwork body 110 are in contact with each other, the coupling force of the entire coupling end portion 111 can be made as uniform as possible. To provide reinforcement.

On the other hand, as shown in Figure 5b, the coupling end 111 of the formwork body 110 and the vertical watertight member 132 and the reinforcing member 131 fastening connected to each other so that the fastening member 136 can be fitted Holes 111a, 132a, and 131a may be formed.

In this case, the fastening hole 111a of the coupling end 111 may have a larger diameter than the fastening holes 132a and 131a formed in the vertical watertight member 132 and the reinforcing member 131. As such, when the coupling hole 111a of the coupling end 111 is large, the coupling member 136 is inserted into the coupling end 111 through the coupling member 136 even after the coupling is performed or the coupling of the coupling end 111 is performed. Since the external impact force is not transmitted to the fastening hole 111a of the coupling end 111, it is possible to prevent damage to the form body 110.

In other words, the fastening member 136 is supported so as not to flow by the holes 131a and 132a of the vertical watertight member 132 together with each reinforcing member 131 or the reinforcing member 131. It is not in contact with the fastening hole 111a.

On the other hand, the vertical watertight member 132 and the reinforcing member adjacent to the side of the coupling end 111 so that the side (that is, the edge region) of the coupling end 111 of the form body 111 is not exposed to external impact force. An end (outer end) of 131 may be configured to protrude more than a side (outer end) of the engaging end 111 of the form body 110.

On the other hand, the outer end of the coupling end 111 may be further provided with a buffer member 135 for blocking the shock transmitted to the coupling end 111 from the outside. In this case, the shock absorbing member 135 may be formed by combining or bonding a packing made of an elastic member, or may be made by applying a caulking member.

On the other hand, the end (outer end) of the vertical watertight member 132 and the reinforcing member 131 is configured to protrude more than the side (outer end) of the coupling end 111 of the form body 110, In the state may be configured to further include a buffer member 135 on the outer end of the coupling end 111.

The vertical watertight member 132 and the reinforcing member 131 may be joined to the coupling end 111 by the joining members 133 and 134, respectively. In this case, the joining members 133 and 134 may be configured to minimize external shock to the coupling end 111 by applying a member made of an elastic material. In particular, the joining member 134 for joining the reinforcing member 131 may be configured to have a sufficient thickness so that the impact force can be prevented as much as possible because the transfer of the external impact can be made more easily.

On the other hand, the boundary of the coupling portion 130 forming a sealing structure in the vertical direction and the horizontal sealing portion 120, that is, the corner portion of the polycarbonate formwork 110, as shown in Figure 6a, the horizontal sealing portion 120 It may be configured to be disposed in the entire upper and lower end region, the coupling portion 130 may be disposed between the horizontal sealing portion 120.

On the contrary, as shown in FIG. 6B, the corner portion of the polycarbonate formwork 110 is configured such that the coupling portion 130 is disposed at both horizontal ends of the form body 110, and between the coupling portions 130. The horizontal seal 120 may be arranged in the.

2 and 3, after the polycarbonate formwork 100 is installed in the steel pipe pile (11), the form body 110 in the gap formed between the formwork body 110 and the steel pipe pile (11) In order to discharge the existing sea water is provided with a domestic water discharge unit 140.

In addition, the form body 110 is provided with a corrosion preventing mortar injection unit 150 for injecting the corrosion preventing mortar into the gap formed between the form body 110 and the steel pipe pile (11).

In addition, the form body 110 is pumped and discharged by a pump to discharge the seawater through the internal water discharge unit 140, and to lower the air pressure between the gap to facilitate the injection of corrosion-resistant mortar In order to discharge the air is provided with an air intake and exhaust 160 is connected.

In this case, the internal water discharge unit 140 is provided at a position adjacent to the gap member 120 provided below, and the air intake and exhaust unit 160 is provided at a position adjacent to the gap member 120 provided at the upper portion. . In addition, the anti-corrosion mortar injection unit 150 may be provided in the lower region of the form body 110 to minimize the generation of voids. On the other hand, when there is an area where voids or less filling is present in the upper region of the form body 110, an additional corrosion-resistant mortar injection portion in the upper region of the form body 110 to facilitate the injection of the corrosion-resistant mortar 150 may be further provided.

As illustrated in FIGS. 7A and 7B, the water discharge part 140, the anti-corrosion mortar injection part 150, and the air intake and exhaust part 160 may be connected to a hole 110a formed in the form body 110. 141, 151, and 161 may be fitted in the inward direction, and the coupling members 142, 152, and 162 may be coupled to the connection members 141, 151, and 161.

In this case, the sealing member 143, 153, 163 is provided between the connecting member (141, 151, 161) and the hole (110a) of the formwork body 110 to form a sealing structure to the outside through the connecting member (141, 151, 161) or the fastening member (142, 152, 162) The impact can be prevented from being transmitted to the area of the hole 110a of the form body 110.

On the other hand, as shown in Figure 1, due to the size of the steel pipe pile 11, the amount of anti-corrosion mortar filled in the carbonate formwork 100, or when the coating area is large, the formwork body 110 by pressure A reinforcing band 17 may be further provided in the lower region of the form body 110 to suppress the swelling of the lower region.

Corrosion-resistant mortar injected into the polycarbonate formwork 100, when applied to a thickness of 1 to 10mm, than self-rusting, chlorine removal, elasticity, watertightness, adhesiveness or It may be made of a material having the same or improved strength characteristics.

For example, the corrosion preventing mortar may be formed by mixing the powder part and the liquid part. The powder part may include white cement, silica fume, slag powder, silica powder, lignin sulfonates, carbon fibers and fibers, etc., and may be formed by mixing two or more of these materials. The liquid portion may include an acrylic ester copolymer, a styrene and butadiene emulsion copolymer, an isoic acid solution, or the like, and may be formed by mixing two or more of these materials.

The white cement is a material having strength expression and alkalinity (self-rusting) by hydration, silica fume is a material for water tightness and high strength, slag powder is a material having long-term strength and alkalinity. In addition, silica powder is a substance for improving carbon fiber dispersion and strength, and lignin acid sulfonic acid salt is a substance for improving chlorine removal and fluidity (workability), and carbon fibers and fibers are elastic and crack resistant (watertight). It is a substance for.

About 30 to 50 parts by weight of white cement, about 4 to 7 parts by weight of silica fume, about 20 to 35 parts by weight of slag powder, about 5 to 20 parts by weight of silica powder, about 0.1 to 0.2 parts by weight of lignin sulfonates And, the carbon fiber and the fibers may be comprised of about 0.8 to 1.9 parts by weight.

Meanwhile, acrylic ester copolymers and styrene and butadiene emulsion copolymers are materials for watertightness, elasticity and adhesion, and asoic acid solution is for chlorine removal.

On the other hand, it may be injected into the polycarbonate formwork 100 according to an embodiment of the present invention by using a coating composition comprising a carbon fiber disclosed in Korea Patent Application No. 2006-0052709 with corrosion protection mortar.

Polycarbonate formwork 100 is configured as described above is to be installed as follows to inject a corrosion-resistant mortar in the inner gap.

The polycarbonate formwork 100 is wound around the droplet of the steel pipe pile 11 to prevent corrosion, and the fastening member 136 is fastened to the coupling portion 130 to install the polycarbonate formwork 100.

Then, the seawater filled between the steel pipe pile 11 and the polycarbonate formwork 100 is discharged. At this time, the air pressure is injected into the air through the air intake and exhaust unit 160 to discharge the seawater filled therein through the domestic water discharge unit 150.

Next, the anti-corrosion mortar is injected through the anti-corrosion mortar injecting unit 150 by blocking the water discharge unit 140. In this case, the internal air may be discharged through the air intake and exhaust unit 160 to facilitate the application of the corrosion preventing mortar.

On the other hand, if there is a region lacking the filling of the anti-corrosive mortar in the upper region, by injecting the anti-corrosive mortar through the anti-corrosive mortar injection portion 150 provided on the upper portion to ensure that the corrosion-resistant mortar completely filled the steel pipe An anticorrosion coating is formed on the droplets of the pile 11.

On the other hand, the polycarbonate formwork 100 may be left in a state installed for the coating in order to prevent damage to the corrosion protection coating due to external impact.

The polycarbonate formwork for anti-corrosion mortar coating for marine steel pipe piles according to the present invention is not limited to the embodiments of the polycarbonate formwork for anticorrosive mortar coating for marine steel pipe piles described above. All or some of the embodiments may be selectively combined to enable modifications.

1 is a view schematically showing the structure of a conventional offshore steel pipe structure.

Figure 2 is a view showing a state in which the polycarbonate formwork for corrosion protection mortar coating polycarbonate form the steel pipe pile according to an embodiment of the present invention.

Figure 3 is a view showing a state unfolded before installation of the polycarbonate formwork for corrosion protection of the marine pipe pile corrosion prevention mortar according to an embodiment of the present invention.

4A is a view showing the structure of the cross section taken along the line A-A of the polycarbonate formwork shown in FIG.

4B is a cross-sectional view of a polycarbonate formwork according to another embodiment.

Figure 5a is a view showing the structure of the cross-section cut along the line B-B of the polycarbonate formwork shown in FIG.

FIG. 5B is an enlarged cross-sectional view of the “C” region of the polycarbonate formwork shown in FIG. 5A.

5C is a partial cross-sectional view showing a state in which the coupling portion of the polycarbonate formwork shown in FIG. 5A is coupled by a fastening member.

Figure 6a is a partial front view showing a state in which the coupling portion of the polycarbonate formwork is coupled by a fastening member according to an embodiment of the present invention.

Figure 6b is a partial front view showing a state in which the coupling portion of the polycarbonate formwork is coupled by the fastening member according to another embodiment of the present invention.

7A is a partial cross-sectional view schematically illustrating a state in which a water discharge part, an anti-corrosion mortar injecting part, and an air intake and exhaust part provided in the polycarbonate formwork according to the exemplary embodiment of the present invention are separated.

FIG. 7B is a partial cross-sectional view schematically illustrating a state in which the water discharge part, the corrosion preventing mortar injecting part, and the air intake and exhaust part shown in FIG. 7A are combined.

* Description of the main parts of the drawings *

100 ... polycarbonate formwork 110 ... formwork body

111 ... engaging end 111a, 131a, 132a ... fastening hole

120 ... horizontal seals 121 ... horizontal watertight members

122,123 ... clearance member 122a ... auxiliary horizontal watertight section

130 ... coupling 131 ... reinforcement

132 ... vertical watertight members 133,134 ... joint members

135 ... buffer member 136 ... fastening member

140 ... Domestic outlet 150 ... Anti-corrosion mortar injection

160 ... air intake and exhaust 141,151,161 ... connecting member

142,152,162 ... fastening member 143,153,163 ... sealing member

Claims (10)

A form body having a flat plate structure made of polycarbonate, coated with a protective film made of a neutral material or an acrylic material, and having a coupling end formed at two ends facing each other; A vertical watertight member provided on a surface where the respective coupling ends are in contact with each other; A reinforcing member provided on the other side of the coupling end facing the vertical watertight member; A gap member coupled to the upper and lower sides of the form body based on a state in which the form body is wound around the steel pipe pile so that a narrow constant gap is formed between the inner surface of the form body and the outer surface of the steel pipe pile; A horizontal watertight member coupled to the upper and lower ends of the form body adjacent to the pole member; Water resistant pipe, corrosion prevention mortar injection portion and the air intake and exhaust portion provided in the form body; marine steel pipe piles anti-corrosion mortar coating polycarbonate form comprising a. The method of claim 1, wherein the protective film is coated on the form body is an acrylic primary film is formed on the outer surface in contact with the sea water and the inner surface in contact with the anti-corrosion mortar, the inner surface of the polyethylene resin (PET) using an acrylic adhesive : Polycarbonate form for application of anti-corrosion mortar for marine steel pipe piles, characterized in that the secondary membrane is bonded by a sheet made of polyethylen terephthalate), polypropylene resin (PP: Polypropylene) or vinyl. According to claim 1, wherein the gap member is a gap holding portion coupled along the upper, lower side of the formwork body; An auxiliary horizontal watertight portion is formed to extend in the direction in contact with the steel pipe pile from the gap holding portion is characterized in that the polycarbonate form for coating of anti-corrosion mortar for marine steel pipe piles. The coupling end of the form body and the vertical watertight member and the reinforcing member are formed with fastening holes connected to each other, and the fastening hole of the coupling end is greater than the fastening hole formed in the vertical watertight member and the reinforcing member. Formed to a large diameter, the fastening member is configured so that the fastening member is not in contact with the fastening hole of the coupling end of the marine steel pipe pile anti-corrosion mortar coating polycarbonate formwork. According to claim 1, wherein the outer end of the vertical watertight member and the reinforcing member is configured to protrude more than the outer end of the coupling end of the form body, the outer end of the coupling end to block the shock transmitted to the coupling end from the outside Polycarbonate formwork for marine steel pipe pile anti-corrosion mortar coating, characterized in that the buffer member for further provided. The method of claim 1, wherein the reinforcing member is made of a flat plate structure or an angle structure, characterized in that the polycarbonate form for application of anti-corrosion mortar coating marine steel pipe piles. The method of claim 1, wherein the form body is a polycarbonate form for coating of anti-corrosive mortar for marine steel pipe piles, characterized in that the reinforcing band is further provided in the outer lower end region in contact with the sea water. The method of claim 1, wherein the water discharge portion, the anti-corrosion mortar injection portion and the air intake and exhaust portion is connected to the hole formed in the form body, the connecting member is fitted in the inside, the coupling member is configured to be coupled to the connecting body, A polycarbonate formwork for marine steel pipe pile anti-corrosion mortar coating, characterized in that the sealing member is inserted between the formed hole and the connecting member. The method of claim 1, wherein the vertical watertight member and the reinforcing member is bonded to the joint end of the formwork by a joining member made of an elastic material, marine steel pipe pile anti-corrosion mortar coating polycarbonate formwork. 10. The method of claim 9, wherein the joining member to join the reinforcing member is a polycarbonate formwork for corrosion protection mortar coating of marine steel pipe piles, characterized in that made of a thickness capable of blocking the external impact.

Images