JPH0340923Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a protective cover used when carrying out corrosion-proof construction on steel pipe piles installed in ports, etc.

"Conventional Technology" With the development of the marine civil engineering industry, corrosion of steel pipe piles, which are the basic material for civil engineering, has become a problem. Among these, the splash zone (tidal area/splash area) is the area where the damage is the most severe and requires reinforcement of corrosion resistance and impact resistance, but repair work there also includes underwater work. Therefore, it can easily become troublesome.

Conventionally, construction work to protect this type of steel pipe pile has been carried out by, for example, attaching half-split cylindrical corrosion-resistant panels (GRC panels, etc.) at an appropriate distance from the outside of the steel pipe pile. A construction method is used in which the steel pipe piles are tied together with a band, and a filler such as mortar is filled between the steel pipe piles and the corrosion protection panel and solidified.

``Problems that the invention seeks to solve'' However, the band-tied protective cover used in conventional construction methods has the following problems. That is, with this method, firstly, the half-split cylindrical corrosion-resistant panels must be tied together with a band while facing each other, which tends to be a laborious task. Second, various cable ties must be prepared to match the size of the protective cover that covers the outer periphery of the steel pipe pile, which tends to increase costs. Third, since the end surfaces of the panels are joined by butting each other, it is difficult to seal the joints.

``Purpose of the invention'' The present invention was made to solve the problems of the conventional technology. It simplifies the process of connecting panels together, makes it possible to reliably seal the joints, and reduces costs. Aims to provide corrosion-resistant protective cover for steel pipe piles.

"Structure of the invention" The invention has a structure in which arc-shaped panels are connected by bolts in an overlapping state in the circumferential direction,
The present invention is characterized in that an insert for bolt fastening is buried in one lap part of the panel, and a bolt hole is formed in the other lap part.

"Embodiment" An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. In the figure, reference numeral 1 is a steel pipe pile, which is constructed so that at least a portion thereof is located below the water surface. Further, reference numeral 2 denotes a tray for preventing the filling material (for example, mortar, etc.) from flowing out, and this tray is designed to be integrally attached to the outer periphery of the portion of the steel pipe pile 1 that is not corroded. Reference numeral 3 indicates a protective cover according to the present invention.

This protective cover 3 has a basic structure in which two semicircular arc-shaped panels 4 are connected to each other by bolts 5 in an overlapping state in the circumferential direction. The panel 4 is formed of GRC made of alkali-resistant glass fiber and cement, and a thick part 6 is provided on the inner periphery of one side edge, which is the lap part. is a female thread 7a on the inner surface of which the bolt 5 is screwed;
A plurality of inserts 7 (four in the illustrated example) are embedded along the length of the thick portion 6. The insert 7 is attached to the panel 4 so that the bolt 5 can be screwed into the panel 4 from outside.
It is open on the outer periphery. On the other hand, on the other side edge of the panel 4, which is the other lap part, a bolt hole 8 for inserting a bolt 5 is formed corresponding to the buried position of the insert 7.
Further, the bolt holes 8 are formed as elongated holes that are elongated in the circumferential direction, so that displacement of the panel 4 in the circumferential direction can be absorbed.

As shown by the two-dot chain line in FIG. 1, if a gasket 9 is attached to one of the overlapping surfaces of the panels 4 (i.e., the mutually opposing surfaces of the wrap portions), the gasket 9 can be attached at the joint between the panels. This is desirable because it improves the sealing effect.

As shown in FIG. 2, in order to construct the protective cover 3 around the outer periphery of the steel pipe pile 1, both edges of the two arcuate panels 4 should be aligned so that the side edges where the inserts 7 are buried are on the side of the steel pipe pile 1. They may be overlapped so that they come together, and the bolt 5 may be passed through the bolt hole 8 and screwed into the insert 7.

This construction is a simple task of overlapping the arc-shaped panels 4 and inserting and fixing bolts into the overlapped portions, and does not require any special techniques or materials (such as cable ties, etc.) during construction. Therefore, it is possible to reduce costs. Furthermore, since the overlapping portions of the panels 4 are tightened with the bolts 5, this joint portion can be reliably sealed.

Note that, as in this embodiment, the panel 4 is
When made of GRC, it has good adhesion to the filler 10 such as mortar that is injected later, but
It may be made of FRP.

"Effects of the Invention" As explained above, according to the present invention, the following excellent effects can be achieved.

(1) The protective cover can be assembled by simply inserting and tightening bolts into the overlapped portions of the panels with the panels overlapped, and the joints can be reliably sealed on-site. Work efficiency can be improved.

(2) Since no special technology or equipment is required to assemble the protective cover, costs can be reduced.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is a perspective view, FIG. 2 is a cross-sectional view,
FIG. 3 is an enlarged sectional view of the chain line circle portion in FIG. 2, and FIG. 4 is a front view of the bolted portion. DESCRIPTION OF SYMBOLS 1... Steel pipe pile, 3... Protective cover, 4... Arc-shaped panel, 5... Bolt, 6... Thick part, 7a...
...Female thread, 7...Insert, 8...Bolt hole,
9... Patsukin.

Claims (1)

[Scope of utility model registration request] In a protective cover for forming a mortar injection space between a steel pipe pile installed in a port or the like, the protective cover is composed of a plurality of arc-shaped panels connected by bolts in an overlapping state in the circumferential direction, Further, an insert having a female thread into which the bolt is screwed is embedded in one lap part of the arcuate panel, and a bolt hole is formed in the other lap part. Steel pipe pile corrosion protection cover.