JPH0733681B2 - Anticorrosion construction method and anticorrosion panel for harbor structure - Google Patents

Description

TECHNICAL FIELD The present invention relates to a construction method for preventing corrosion of a port structure such as a jetty and a flexible panel used therefor.

[Prior Art] It is known that the tide area, splash area and subsea area of a port structure such as a steel pipe support of a jetty or a steel sheet pile used for landfill is intensively corroded by the action of a macro battery.

In order to prevent this corrosion, in the past, Japanese Patent Laid-Open No. 63-294972
No. 130827 and No. 130827, the surface of the structure is subjected to a surface treatment by a sandblast method or a water jet method, and then a lining agent such as an underwater curing type epoxy resin is applied on the surface for anticorrosion treatment. Further, since the spray type coating means cannot be used in the undersea portion of the structure, the diver is manually coating the epoxy resin in which the curing agent is added to the main component instead of the diver.

[Problems to be solved by the invention] However, in the conventional anticorrosion construction method, since the thickness of the lining agent needs to be at least 3 mm or more from the viewpoint of permeation of seawater and durability, the lining agent may be repeatedly overlaid in the sea. It has to be applied, which is troublesome and the cost of the epoxy resin is high.

On the other hand, it is widely practiced to cover the corrosion-protected area of a structure with a corrosion-resistant FRP cover, but in this case, it is necessary to mold a cover according to the shape of each structure, and multiple panels The seams of each panel must be securely sealed after being glued to the structure.

The present invention has been made in view of such circumstances, and a first object thereof is to provide an anticorrosion construction method for a harbor structure capable of significantly reducing the overcoating of the lining agent and reducing the labor and cost thereof. It is in. A second object of the present invention is to provide an anticorrosion panel that does not require special sealing means, bolts, etc. and has increased adhesion.

[Means for Solving the Problem] In order to achieve the first object, in the anticorrosion construction method of the present invention, the anticorrosion area of the harbor structure is subjected to an undercoating treatment, and an underwater curing type lining agent is applied to the surface. Then, a non-corrosive soft panel having a plurality of holes and a non-woven fabric attached to the inner surface is pressed and attached until the lining agent protrudes from the holes.

Further, in order to achieve the second object, the anticorrosion panel of the present invention is composed of a soft panel having holes at predetermined positions and a non-woven fabric attached to the inner surface of the soft panel.

[Operation] According to the configuration of claim (1), when each soft panel is pressed onto the lining agent applied to the harbor structure, the panel strongly adheres to the lining agent via the nonwoven fabric, and
The pressing force causes the lining agent to enter the joints and holes of each panel for sealing. Since the flexible panel has flexibility, it can follow the structure even if the surface of the structure is not completely flat, and the thickness of the lining agent can be reduced by the amount of the panel.

Further, when the anticorrosion panel of claim (2) is pressed onto the layer of the lining agent, a part of the lining agent enters into each hole and is cured, so that the adhesion of the flexible panel is improved.

[Embodiment] FIG. 1 and FIG. 3 are respectively an assembled perspective view and a sectional view after the construction of the anticorrosion construction method according to the present invention, and FIG. 2 is an enlarged sectional view of the anticorrosion panel.

In the anticorrosion area of the harbor structure 1, scribes and rust on the surface are removed by the sand blast method or the water jet method, and the underwater curing type lining agent 2 is applied after the surface treatment. The lining agent 2 itself is the same as the conventional product in which the curing agent is added to the main component of the epoxy resin, but the coating thickness is 1.5 mm or less, that is, half or less of the conventional thickness. In this embodiment, a commercially available AC Marine Coat (trade name) is used as the lining agent 2, which can be easily applied by a diver with a hand or a roller.

Next, the soft panel 3 having corrosion resistance is sequentially pressed and attached to the surface of the lining agent 2. This soft panel 3 is made of FRP, but is superior in flexibility and bending workability to general FRP, and has a nylon non-woven fabric 4 attached to its surface with an adhesive. In this embodiment, a continuous molded FRP ultra-soft sheet having a non-woven fabric 4 having a thickness of about 0.5 mm attached in advance is cut into a length of about 30 cm and a thickness of about 0.8 mm to obtain a large number of soft panels 3. There is. Moreover, each soft panel 3 is provided with a plurality of holes 5, 5.

Therefore, when the soft panel 3 is strongly pressed onto the lining agent 2, the inner concave-convex surface 5 (Fig. 2) improves the adhesion, and the holes 5 and 5 of the panel and the joint 6 between the panels enhance the lining agent. 2 is extruded. Therefore, each hole
The lining agent 2 hardened in 5, 5 plays a role of fixing the soft panel 3 on the lining agent 2, and the lining agent 2 hardened in the joint 6 performs a sealing action, so that a bolt or a seal is not necessary.

Further, since the soft panel 3 has flexibility, it is possible to sufficiently deal with a slight unevenness on the surface of the structure 1, and by providing the non-woven fabric 4 on the inner surface, the adhesive force with the lining agent 2 is strengthened. Become. The size and the number of the holes 5, 5 of the flexible panel 3 are set so that a part of the lining agent 2 protrudes when the panel 3 is pressed against the lining agent 2.

[Effects of the Invention] As described in detail above, according to the anticorrosion construction method of claim (1), since the soft panel is attached in a pressed state on the lining agent applied to the structure, the lining agent is repeatedly overlaid. The need for painting is eliminated and the labor is saved. Further, since the soft panel is attached to the lining agent via the non-woven fabric, it does not come off, and the joints and holes between the soft panels are filled with the lining agent, so that there is an effect that sealing is performed at the same time.

Further, when the anticorrosion panel according to claim (2) is used, the lining agent penetrates into each hole by a pressing force and is cured, so that the adhesive force between the panel and the lining agent is improved.

[Brief description of drawings]

FIG. 1 is an assembled perspective view showing the anticorrosion construction method of the present invention, and FIG.
The figure is an enlarged sectional view of the anticorrosion panel, and FIG. 3 is a sectional view after anticorrosion construction. 1 ... Harbor structure, 2 ... Lining agent, 3 ... Soft panel, 4 ... Nonwoven fabric, 5 ... Panel hole, 6 ... Seam between panels

Claims (2)

[Claims] 1. A lining agent for an anticorrosion soft panel having a plurality of holes in which an underwater hardening type lining agent is applied to the surface of a harbor structure to be protected from corrosion and a non-woven fabric is attached to the inner surface. Corrosion-proof construction method for harbor structures, which is characterized by pressing and sticking until it protrudes from the hole. 2. A flexible panel having holes at predetermined locations,
The anticorrosion panel used in the anticorrosion construction method according to claim 1, comprising a non-woven fabric attached to the inner surface of the soft panel.