JPH0342112Y2 - - Google Patents

Description

[Detailed explanation of the idea]

(Technical Field) The present invention relates to a corrosion-resistant structure for steel sheet piles constructed as sheet piles for quay wall protection. (Background technology) Steel sheet piles are generally constructed as sheet piles for seawall protection, but these steel sheet piles are susceptible to corrosion when exposed to seawater, especially in the area between high tide and low tide called the splash zone. Corrosion tends to occur in areas exposed to seawater splashes due to repeated contact with seawater and oxygen in the air, and it is therefore necessary to perform anti-corrosion treatment on these areas. Therefore, the present applicant filed Japanese Patent Application No. 58-66229
(No. 192135), we provided information on corrosion protection of steel sheet piles. In other words, patent application No. 58-66229
In the above, a mounting tool with protruding bolts is fixed to the surface of the steel sheet pile installed on the quay, and the cover plate is attached to the surface of the steel sheet pile so that the corrosion-resistant material is clamped between the steel sheet pile and the cover plate. The cover plate is attached to the steel sheet pile by passing bolts through the holes in the cover plate and tightening the nuts, and with the corrosion-resistant material protected by the cover plate, the steel sheet pile is protected from corrosion by the corrosion-resistant material. That's what I do. The problem in this case is that the steel sheet piles installed on the quay are not installed in the correct orientation. In other words, steel sheet piles are used by connecting a large number of steel sheet piles from side to side with the connecting pieces provided at both side ends fitting together, but due to misalignment of the fitting between these connecting pieces, It is difficult to connect the steel sheet piles so that they are parallel to each other, so in actual construction, as shown in Figure 1, the ends (the left end in Figure 1)
The steel sheet piles 1 located at , for example, are tilted slightly to the left in advance, and as the steel sheet piles 1 are successively connected, the steel sheet piles 1 are tilted, for example, to the right due to misalignment of the fitting of the connecting pieces. Then, a substantially trapezoidal deformed steel sheet pile 10 is installed, and here the steel sheet pile 1 is again inclined slightly to the left and the steel sheet piles 1 are connected one after another.In this way, the steel sheet pile 1 is attached to the quay wall 11. The installation will be carried out. Then, the cover plate is attached to the front side of the steel sheet pile in correspondence with each steel sheet pile, and with the side edges of the adjacent cover plates overlapped, the bolts fixed to the steel sheet pile are passed through the holes in both cover plates. However, since each steel sheet pile is tilted, each cover plate is attached to the steel sheet pile in an inclined state, and as a result, the through holes in adjacent cover plates are vertically misaligned. However, since the through holes at the side ends of adjacent cover plates do not match, it becomes impossible to pass bolts through both through holes of the adjacent cover plates, and as a result, it is impossible to install the cover plates. It's something you'll become accustomed to. (Purpose of the invention) The present invention has been made in view of the above points, and provides a corrosion-resistant structure for steel sheet piles that allows cover plates and connecting cover plates to be installed without any problem even if the steel sheet piles are tilted. The purpose is to (Disclosure of the invention) However, the corrosion-resistant structure of steel sheet piles according to the invention is as follows:
A plurality of upper and lower bolts 2, 2 are installed on the surface of the steel sheet pile 1.
Fixtures 3 protruding from... are fixed at multiple locations on the left and right, and elongated holes 5 in the vertical direction are provided on both sides of the cover plate 4.
5... are bored in the upper and lower portions, and the connecting cover plate 6
A plurality of upper and lower mounting holes 7, 7... are drilled on both sides of the
The cover plates 4 are placed on the surface of the steel sheet pile 1 in such a state that the cover plates 4 and the connecting cover plates 6 are arranged alternately, and the corrosion-resistant material 8 is clamped between the steel sheet piles 1, the cover plates 4, and the connecting cover plates 6. and the connecting cover plate 6, overlap the side ends of the cover plate 4 and the connecting cover plate 6, and pass the bolt 2 through the elongated hole 5 of the cover plate 4 and the mounting hole 7 of the connecting cover plate 6, and then tighten the bolt. 2 and a nut 9 is fastened to the cover plate 4.
The above object is achieved by the elongated hole 5 provided in the hole 5, and the present invention will be explained in detail below with reference to examples. The cover plate 4 and the connecting cover plate 6 are preferably made of glass fiber-reinforced thermoplastic resin, and among glass fiber-reinforced thermoplastic resins, glass fiber-reinforced vinyl chloride resin (FRV) is most preferably used. FRV has excellent chemical resistance,
It has good durability against corrosive liquids such as seawater, and because it has glass fibers in both sides, it is impact-resistant and hard to break, so there is no need to worry about it breaking even in low-temperature environments. Here, it is possible to use glass fiber reinforced thermosetting resin (FRP) as the cover plate 4 and the connecting cover plate, but as shown in the following table, the strength of FRP is not much different from that of FRV. Moreover, FRP has a higher specific gravity than FRV, is heavier, and has poor workability.
The workability of molding FRP is poor and it is expensive;
In addition, it is virtually impossible to perform secondary processing on FRP, making it impossible to cut or drill holes on site, making it difficult to accurately install protective covers depending on the site conditions, and making repairs impossible. It is preferable to use FRV because it has various disadvantages.

[Table] The cover plate 4 is formed to have a cross-sectional shape that follows the surface shape of the steel sheet pile 1 constructed for the purpose of revetment of the quay wall, and the steel sheet pile 1 is constructed so as to form a substantially U-shaped cross section. If the cover plate 4 has a U-shaped cross section, the flange pieces 1 are formed from both ends of the cover plate 4 as shown in FIG.
2, 12 are extended, and each flange piece 12 has vertically long elongated holes 5, 5... bored in a plurality of upper and lower locations. Further, in the center of the cover plate 4, fixing holes 13 are bored at about three positions above and below. Further, the connecting cover plate 6 is formed by extending connecting pieces 15, 15 from both sides of the bent portion 14, as shown in FIG. Round mounting holes 7 are drilled at a plurality of locations on the top and bottom to ensure that the mounting holes 7 are fixed. Next, a description will be given of construction performed for corrosion protection of the steel sheet piles 1 already installed for the protection of a quay wall using the cover plate 4 and the connecting cover plate 6 formed as described above. The steel sheet pile 1 has connection pieces 16, 16 at both ends.
A plurality of them are connected by connecting pieces 16, 16 and are arranged in parallel on the side of the quay wall 11 as shown in Fig. 6a. Foreign matter 19 such as marine organisms and rust adhering to the surface of the steel sheet pile 1 as shown in FIG. Next, a fixture 3 with bolts 2 protruding from the recessed portion 20 of the steel sheet pile 1 is fixed. As shown in FIG. 5, this fixture 3 is constructed by attaching bolts 2 to the front side of a vertically elongated metal flat bar 17 at the same intervals as the mounting holes 7 of the connecting cover plate 6 by welding or the like. It is formed by providing a welding hole 18 in the part, and after passing each bolt 2 through the mounting hole 7 from the back side of the connecting cover plate 6 and aligning the connecting cover plate 6 and the fixture 3, the connecting cover is removed. Arrange the fixtures 3, 3 on the back side of each connecting piece 15, 15 of the plate 6, and in this state, attach the fixtures 3, 3 together with the connecting cover plate 6 to the concave portion 20 of the steel sheet pile 1. Then, the upper and lower ends of the fixtures 3, 3 are welded to the steel sheet pile 1 while the fixtures 3, 3 are positioned using the connecting cover plate 6.
Temporarily fasten. After the connecting cover plate 6 is removed, the fixture 3 is fixed by spot welding the inner peripheral edge of the welding hole 18. In this case, it is difficult to weld the side ends of the fixture 3 because the steel sheet pile 1 protrudes further to the front side than the fixture 3, so welding holes 18 are formed in the fixture 3 as described above. This allows welding work to be carried out from the front. Thereafter, the fixtures 3 are fixed in the recessed portions 20 of the steel sheet pile 1 in the same manner as shown in FIG. 6b. Next, cover plate 4
Cover the convex portion 21 of the steel sheet pile 1, pass each long hole 5 on both sides of the cover plate 4 through the bolt 2 of the fixture 3, and adjust the position of the cover plate 4 so that the bolt 2 is in the vertical center of the long hole 5. In this state, marks are made on the surface of the steel sheet pile 1 through the fixing hole 13 of the cover plate 4. After removing the cover plate 4, the mounting bolts 22 are fixed by welding or the like at the marked positions as shown in FIG. 6c. With the preparations completed in this manner, a sheet-like or putty-like anti-corrosion material 8 is pasted on the inner surface of the cover plate 4 and the inner surface of the connecting cover plate 6. It is preferable to use a material containing petrolatum as a main component as the corrosion-preventing material 7. Petrolatum is a type of petrolatum separated from crude oil by vacuum distillation, and is a white or brown translucent jelly-like substance whose main components are paraffinic and olefinic hydrocarbons with 16 to 32 carbon atoms, and the specific gravity is 0.82-0.88, melting point is around 40°C. This petrolatum has the property of not evaporating or hardening semi-permanently, and when pasted on a metal surface, it forms a semi-permanent corrosion-resistant layer that maintains viscosity at all times. There is no deterioration due to ozone, and by completely isolating the steel sheet pile 1 from seawater and oxygen in the air with this anti-corrosion layer, the physical causes of corrosion can be completely eliminated.
Then, a rust inhibitor, tannin, inert silica, etc. are added to this petrolatum, and a non-woven fabric is impregnated with this to form a sheet or tape, or it is solidified into a putty to form the anti-corrosion material 8. The above tannin is a mixture of phenolic compounds, and when this tannin comes into contact with iron, it forms a hard, dense film called tannin ferrate on the iron surface, which has the property of inhibiting the progress of rust. After that, the cover plate 4 is placed over the convex portion 21 of the steel sheet pile 1 again, the mounting bolts 22 are passed through the fixing holes 13, the bolts 2 of the fixture 3 are passed through the long holes 5 on both sides, and the nuts 23 are inserted into the mounting bolts 22. The cover plate 4 is temporarily fixed to the steel sheet pile 1 by screwing and tightening, and the cover plate 4 is temporarily fixed in the same manner at each convex portion 21. After that, the connecting cover plate 6 is placed in the concave portion 20 of the steel sheet pile 1, and each bolt 2 of the fixture 3 is passed through each mounting hole 7 on both sides of the connecting cover plate 6, and the flange piece 12 of the cover plate 4 is inserted. Layer the connecting piece 15 of the connecting cover plate 6 on the surface and tighten the nuts 9 on each bolt 2 to tighten the bolts and nuts 2, 9.
By this means, the cover plate 4 and the connecting cover plate 6 are permanently fixed. Here, when the steel sheet pile 1 is installed at an angle as shown in FIG. There is no problem because the fixtures 3 are fixed to the steel sheet pile 1 with the bolts 2 aligned with the attachment holes 7 of the connection cover plate 4, but since the steel sheet pile 1 is tilted, there is no problem. As a result, the bolts 2, 2 passing through the elongated holes 5 on both sides of the cover plate 4 are vertically displaced. Even if the bolts 2 are displaced vertically in this way, the elongated holes 5 are long in the vertical direction, so this vertical displacement is tolerated, and the cover plate 4 can be attached with the bolts 2 without any problem. Through the construction described above, a corrosion-resistant structure is completed in which the surface of the steel sheet pile 1 is covered with a corrosion-resistant material 8, and the corrosion-resistant material 8 is further protected by the cover plate 4 and the connecting cover plate 6, as shown in Fig. 2. It is something that will be done. The upper ends of the cover plate 4 and the connecting cover plate 6 are sealed by filling them with an underwater curable epoxy resin 25 as shown in FIG. In addition, in the above embodiment, it is preferable to use bolts 2 and mounting bolts 22 whose male threads are made of FRP, and in this case,
Since the male threaded portion of FRP is not corroded by seawater, it is possible to prevent the nuts 9 and 23 from rusting and making reinstallation impossible. FIGS. 8, 9, and 10 show other embodiments of the present invention. In other words, in the case of the steel sheet pile 1 shown in Fig. 2, a Z-shaped cross section was used, but in the case of the case shown in Fig. 8, a steel sheet pile 1 formed with a U-shaped cross section was used. This is what I did. In this case, since the connecting pieces 16 at both ends of the steel sheet pile 1 swell and protrude in the recessed portions 20, the bent portions 26 in which the connecting pieces 16 are accommodated are attached to the cover plate 4, as shown in FIG. It is formed. In addition, as in the case of FIG.
It is not necessary to form the connecting cover plate 4, and the connecting cover plate 6 may be formed into a flat plate shape as shown in FIG. The cover plate 4 and the connecting cover plate 6 can be attached to the steel sheet pile 1 by the same operation as described above. (Effects of the invention) As mentioned above, with the present invention, it is possible to protect the steel sheet piles from corrosion by using the corrosion-resistant material that is clamped between the steel sheet piles, the cover plates, and the connecting cover plates. The cover plate is attached to the steel sheet pile by drilling vertically long elongated holes on both sides of the cover plate and passing the bolts through these elongated holes. Even if there is a vertical misalignment, the vertical misalignment is allowed by the vertical length of the elongated hole, and the cover plate can be installed by passing bolts through the elongated hole of the cover plate without any problem. .

[Brief explanation of the drawing]

Figure 1 is a schematic diagram showing the construction status of steel sheet piles, Figure 2
The figure is a plan sectional view of one embodiment of the present invention, Figures 3a and b
4A and 4B are front views and plane sectional views of the connecting cover plate used in the above, and FIGS. 5A and 5B are front views of the fixture used in the same. and a partially enlarged view, Figures 6a, b, and c are schematic plan sectional views showing the order of construction of the same as above, and Figures 7a,
b is a side view showing the construction state of the above, FIG. 8 is a plan sectional view of another embodiment, FIGS. 9 a and b are a front view and plan sectional view of the cover plate used in the above, and FIGS. b
These are a front view and a plan sectional view of a connecting cover plate used in the same as above. 1...Steel sheet pile, 2...Bolt, 3...Mounting tool,
4...Cover plate, 5...Elongated hole, 6...Connection cover plate, 7...Mounting hole, 8...Corrosion resistant material, 9...Nut.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Fixtures with multiple bolts protruding from the top and bottom on the surface of the steel sheet pile are fixed at multiple locations on the left and right, and elongated holes that are long in the vertical direction are formed on both sides of the cover plate. At the same time, a plurality of upper and lower mounting holes are drilled on both sides of the connecting cover plate, and the cover plates and the connecting cover plates are arranged alternately to prevent corrosion between the steel sheet pile, the cover plate, and the connecting cover plate. Layer the cover plate and the connecting cover plate on the surface of the steel sheet pile with the material being clamped, overlap the side edges of the cover plate and the connecting cover plate, and connect the elongated hole of the cover plate with the mounting hole of the connecting cover plate. A corrosion-resistant structure of steel sheet piles, which is made by passing the above-mentioned bolts through the bolts and fastening nuts to the bolts. (2) The corrosion-resistant steel sheet pile structure according to claim 1, wherein the cover plate and the connecting cover plate are made of glass fiber-reinforced thermoplastic resin. (3) The corrosion-resistant structure for steel sheet piles according to claim 2, wherein the glass fiber reinforced thermoplastic resin is glass fiber reinforced vinyl chloride resin. (4) The corrosion-resistant structure of steel sheet piles according to claim 1, 2, or 3 of the utility model registration claim, characterized in that the main component of the corrosion-resistant material is petrolatum.