JPS5944461B2 - Seal structure between corrosion-resistant cover and joints in steel pipe sheet piles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seal structure between a corrosion-resistant cover and a joint in a steel pipe sheet pile.

In recent years, various anti-corrosion works have been carried out to prevent corrosion of underwater structures due to tides and wave spray, and steel pipe sheet piles, which are made by driving a large number of steel pipes into the seabed and installing them in series, are no exception.

As shown in Fig. 1, the steel pipe sheet piles are steel pipes for sheet piles 1, 1...
A large number of them are arranged in a row and connected to each other by joints 2, 2, etc. to prevent earth and sand 3 on the land side from flowing out to the sea side 4.

(Fig. 2) In addition to the shape shown in Fig. 2, the fitting 2 has a pipe T.
There are various types such as type, pipe type, and angle type.

Generally, these structures can be protected from corrosion by covering the tidal and splash zones with corrosion-resistant covers.

However, while it is sufficient to cover the cylindrical anti-corrosion covers one by one for the steel pipe supports of port structures, in the case of steel pipe sheet piles as shown in Figure 1, the joints become a nuisance.

Therefore, one possibility is to cut out the joint 2 along the length covered by the corrosion-resistant cover 5 as shown in Fig. 3, cover the cover 5, and then connect the upper parts of the steel pipes 1 to each other as necessary. It is.

However, when a steel pipe with a portion of the joint 2 cut out is actually driven into the seabed, the upper surfaces of each joint usually do not align as shown in FIG. 4.

Even when driving steel pipes, it is difficult to position them all vertically, and the inclination of the steel pipe further exacerbates the misalignment of the joint.

In addition to this, the top surface of the cut joint is also not completely flat.

Therefore, a gap is created between the corrosion-proof cover placed on the joint and the joint, and seawater enters the earth and sand through this gap, and the earth and sand flow out to the sea side.

Also, if the top surface of the joint is not flat, it will affect the stability of the cover.

Since the soil pressure and water pressure during seawall construction are extremely high, a sufficient sealing effect cannot be obtained by using a normal backing.

The present invention was made in view of these circumstances, and
It is an object of the present invention to provide a seal structure that is durable and performs a perfect sealing action.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 5 is an enlarged view of the lower end of the corrosion-resistant cover 5 and the joint 20, and FIG. 6 is a cross-sectional view taken along the line ■-■.

As can be seen from the figure, an elastic material 6 such as rubber is placed on the joint 2, and a U-shaped member 7 is placed over this to ensure a flat surface.

As shown in FIG. 7, the upper side edge of the U-shaped member 7 is
, 1 is preferably slightly curved to fit the outer surface of the parts.

Furthermore, from the viewpoint of molding and corrosion resistance, F, R, and P are used as the materials in this embodiment.

If the deformation or misalignment of the upper surface of the joint 2 is not significant, the elastic member 6 may be omitted.

Corrosion-proof covers 5, 5 for each steel pipe are placed on the U-shaped member 7 via a sealing member 8 such as sponge or rubber.

Since the corrosion-resistant cover 5 is filled with mortar, cement, etc. and solidified, the sealing member 8 is compressed and completely seals between the cover 5 and the joint.

As described above, according to the seal structure of the present invention, the lower end of the corrosion-resistant cover and the joint can be easily and completely sealed.

[Brief explanation of the drawing]

Figure 1 is a front view of the steel pipe sheet pile, Figure 2 is its plan view, and Figure 3 is the front view of the steel pipe sheet pile.
The figure is a front view of the steel pipe sheet pile with the joint partially cut out, Figure 4 is an enlarged view showing the fitting part of the joint, Figure 5 is an enlarged view of the seal structure of the present invention, and Figure 6 is Figure 5 VI-VI. A cross-sectional view along the line,
FIG. 7 is a perspective view of the U-shaped member. 1...Steel pipe for sheet pile, 2...Joint, 3...Earth and sand, 4
... sea, 5 ... corrosion-resistant cover, 6 ... elastic member, 7
... U-shaped member, 8... Seal member.

Claims (1)

[Scope of Claims] 1. A U-shaped member is placed over a joint that connects continuous sheet pile steel pipes to each other, a sealing member is attached to the upper surface of the member, and a corrosion-resistant overcoat is inserted into each of the steel pipes. A sealing structure between a corrosion-resistant cover and a joint in a steel pipe sheet pile, characterized in that the lower end of the cover is placed on a sealing member, and the sealing member is brought into pressure contact with the weight of the cover and internal filler. 2. The seal structure according to claim 1, wherein the upper side edges of the U-shaped member are curved to fit the outer surfaces of the steel pipes on both sides. 3. The seal structure according to claim 2, wherein the U-shaped members are F, R, and P.