JPH0130969B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of rust-proofing a joint portion of a bridge. Bridges are usually painted after construction is completed, but because they are exposed to wind, rain, and sunlight, their rust prevention effects are not as effective. For this reason, periodic inspections are performed on joints where rust is particularly severe. In this inspection, the bolts of the joints are removed and the internal rust is examined, and if the rust liquid flowing out of the bolt holes is severe, the joints and bolts are replaced. Bridge painting does not extend to the joints or the inner surfaces of the bridge base material, so if a bridge is exposed to the wind and rain for a long period of time, rust will inevitably form. As a countermeasure to this problem, some companies apply zikritchi paint to the inner surfaces of each joint and base material, but rainwater still infiltrates through the gaps between bolts and holes and the joints of joints. On the other hand, there are also circumstances in which it is better for the inner surfaces of joints and bolt holes to have some degree of rust. This is because rust increases friction and prevents bolts from loosening. Therefore, it can be said that it is desirable to prevent rainwater from entering from the outside and suppress the occurrence of rust to a certain limit while allowing some rust to occur within the joint.

The present invention has been made to solve these problems, and its key point is to cover the joint portion of the bridge with a peelable member in advance, and then apply a coating on this. Embodiments will be described in detail below with reference to the accompanying drawings.

Figure 1 is an enlarged view of the joint part of a bridge. After the bridge base materials 1, 1 are butted together, they are clamped from both sides by joints 2, 2, and a large number of bolts 3, 3...
It is firmly pressed and fixed. FIG. 2 shows this cross-sectional view, in which the joint 2, bolt 3, and part of the base material 1 are covered with a peelable member 4, and a coating 5 is applied thereon. Peelable member 4
Strippable paints, sheets or molded panels are used. Peelable paint is paint that can be applied with a paint sprayer or brush, and then easily removed by hand after drying, and is commercially available under the trade name ``Kuripaku''. If sheets or molded panels are used, they should be removable. Since the peelable member 4 covers the gap between the bolt 3 and the bolt hole and the joint surface between the joint 2 and the base material 1, it is possible to prevent rainwater from entering. Furthermore, if a peelable paint is used, the paint can be simply peeled off during periodic inspections, eliminating the need for polishing the painted surface. Once the inspection is complete, cover it again with a peelable material. In addition, for bridges that have already been painted, it is sufficient to apply a peelable member on top of the bridge without taking the trouble of applying paint.

As described above, according to the rust prevention method of the present invention, the intrusion of rainwater can be prevented and the occurrence of rust in the joint portion can be suppressed as much as possible, so that the durability of the joint and bolt can be improved. In addition, there are great benefits such as a reduction in the number of repair works required. Note that the present invention can be applied not only to bridges but also to structures of the same type.

[Brief explanation of drawings]

FIG. 1 is an enlarged perspective view of a bridge joint portion, and FIG. 2 is a cross-sectional view of the same portion subjected to rust prevention treatment. 1...Bridge base material, 2...Joint, 3...Bolt,
4... Peelable member, 5... Painted surface.

Claims (1)

[Scope of Claims] 1. A method for preventing rust at a joint part of a bridge, etc., which comprises coating the joint part of the bridge, etc. with a peelable material, and then painting the entire bridge. 2. The rust prevention method according to claim 1, wherein the peelable member is a peelable paint. 3. The rust prevention method according to claim 1, wherein the peelable member is a sheet. 4. The rust prevention method according to claim 1, wherein the peelable member is a removable molded panel.