JP2001073357A - Coffering structure and constructing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coffering structure capable of conducting sufficient cutoff even when sheet piles are arrayed in a row or even when the sheet piles are deflected by water pressure or the like, while being capable of construction in a short period at a low cost, and its constructing method. SOLUTION: The coffering structure is constituted, in such a manner that mounting plates 6, 6 are opposed mutually and fixed to a pair of two sheet piles 5, 5 in a plurality of the sheet piles 5 respectively, while a cutoff member composed of a flexible material such as a rubber is stretched between these mounting plates 6, 6. In the constructing method, a plurality of the sheet piles are built to a ground in a row, combining these mutual joint sections, grouting is executed to separately combined joint sections, and the mounting plates are made opposed mutually and fixed to a pair of the two sheet piles respectively, while the cutoff member is stretched between these mounting plates.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutoff structure constructed around a structure in marine or river works, and a method of constructing the structure.

[0002]

2. Description of the Related Art As a conventional shutoff structure, for example, a structure shown in FIGS. The deadline structure is
Around a structure 1, a plurality of steel pipe-shaped steel sheet piles 2 are arranged in two rows of two large and small plane U-shapes that are held at a fixed interval from each other, and a sand 3 or the like is interposed between them. It is something that is packed. Reference numerals 4 ... are connecting steel rods horizontally suspended between the upper end portions of the steel sheet piles 2 ....

The steel sheet piles 2 are connected by connecting these joints 2a, 2a, and are grouted by filling concrete into the joints 2a, 2a to provide waterproofing. Processing.

[0004]

However, although the conventional shutoff structure has a high water-blocking property, a plurality of steel sheet piles 2...
Are arranged in two rows, and sand 3 and the like must be packed between them, so that the construction cost is high and the construction takes time.

On the other hand, if the steel sheet piles are arranged in a single row, the construction cost is low and the construction time can be shortened. However, the steel sheet piles 2... There is a drawback that water leaks easily due to cracks in the filled concrete.

According to the present invention, it is possible to perform perfect water stoppage even when the sheet piles are arranged in a row and when the sheet piles are bent due to water pressure or the like, and to construct the sheet piles at low cost in a short time. It is an object of the present invention to provide a cut-off structure and a method for constructing the same.

[0007]

According to a first aspect of the present invention, there is provided a cut-off structure comprising a pair of sheet piles, of which a pair of sheet piles is opposed to a pair of sheet piles. In addition to being fixed, a water blocking member 7 made of a flexible material such as rubber is stretched between the mounting plates 6 and 6.

[0008] In the shut-off structure according to the second aspect, the mounting plates 6, 6, 6 ', 6' have joint portions 5b, 5b, 16b, 1 '.
6b, which is fixed to the dry work side at the boundary.

According to a third aspect of the present invention, the pair of sheet piles 5 and 5 are arranged adjacent to each other.

According to a fourth aspect of the present invention, in the shutoff structure, two pairs of sheet piles 16 are arranged alternately.

The shut-off structure according to claim 5 employs a steel pipe-shaped steel sheet pile 5 as the sheet pile.

The shutoff structure according to claim 6 employs a U-shaped steel sheet pile 16 as the sheet pile.

According to a seventh aspect of the present invention, there is provided a method for constructing a cut-off structure, wherein a plurality of sheet piles are laid in the ground in a row while these joints are connected to each other, and grouting is performed on each connected joint. After that, the attachment plates are fixed to the two sheet piles facing each other so as to face each other, and a water blocking member is stretched between them.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A shutoff structure according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 3, the shutoff structure A is formed of two steel sheet piles 5, 5 which are adjacently arranged in a pair among a plurality of steel sheet piles 5. The mounting plates 6 and 6 are fixed to face each other, and the mounting plates 6 and 6 are fixed to each other.
It has a structure in which a water blocking member 7 made of a flexible material such as rubber is stretched therebetween, and is arranged in a U-shape around a building 8 to be built. In addition, 9 has shown the coastline.

The sheet pile 5 is of a steel pipe type in which the sheet pile main body 5a is a steel pipe, and joints 5b, 5b of a flat circular shape are arranged on the peripheral wall of the sheet pile main body 5a.

The mounting plate 6, as shown in FIG.
From the position (a) in the figure, the water level H. W.
It is made of steel having a length that can be disposed over a position (b) higher than L, and bolt holes 10 as shown in FIG. .

The fixing positions of the mounting plates 6 and 6 to the steel sheet piles 5 and 5 are on the outer peripheral wall of the sheet pile main body 5a and on the dry work side with the joints 5b and 5b, in other words, with the joints 5b and 5b. The outer edge is welded by penetration welding or the like with their inner edges facing each other.

The water stopping member 7 is made of a flexible material such as rubber which can bend following the bending of the steel sheet pile 5 due to water pressure or the like, and has a central portion protruding in a semicircular shape. And the same length as the mounting plate 6. 11 are bolt holes arranged at required intervals on both side edges.

Reference numeral 12 denotes a steel binding plate having the same length as the mounting plate 6, which includes bolt holes 11 of the water stopping member 7.
Are arranged in rows at positions opposite to. That is, the attachment plate 6 and the water stopping member 7 are brought into close contact with each other by tightening the side edges of the water stopping member 7 with the bolts 14 and the nuts 15 between the binding plate 12 and the mounting plate 6.

The construction of the shutoff structure A is made of steel sheet piles 5.
While connecting these joints 5b, 5b,
It is laid on the ground G so as to have a flat U-shape, grouting is performed by filling concrete into the joined joints 5b, 5b, and then, two pairs of steel sheet piles 5, 5 adjacent to each other are formed. The fixing plates 6 and 6 are fixed to the respective parts.

The attachment plates 6 and 6 are fixed with their inner edges facing each other and two adjacent steel sheet piles 5 and 5 are attached.
The outer edges are welded to the peripheral walls of the sheet pile main bodies 5a, 5a by, for example, penetration welding or the like, and thereafter, the water stop member 7 is screwed and stretched between them with bolts 14 and nuts 15.

The lower ends of the mounting plates 6, 6 and the water blocking member 7 are buried in the replacement concrete cast on the ground G after these are mounted.

Accordingly, even if the steel sheet pile 5 is bent or deformed with time due to water pressure or the like and cracks occur in the concrete of the joints 5b, 5b, water leakage can be stopped. .

Next, a shutoff structure B according to another embodiment
Will be described with reference to FIG. This cutoff structure B
Is a plurality of steel sheet piles 16 connected in one row,
Two pairs of steel sheet piles 16, 16 arranged alternately
With fixing plates 6 ', 6' facing each other and a water blocking member 7 'made of a flexible material such as rubber stretched between the mounting plates 6', 6 '. It is.

The steel sheet pile 16 is U-shaped in which the sheet pile main body 16a is a steel plate, and joint portions 16b, 16b are arranged on both side edges of the sheet pile main body 16a.

The fixing positions of the mounting plates 6 ', 6' to the steel sheet piles 16, 16 are located on the outer peripheral wall of the sheet pile body 16a.
On the dry work side bordered by b and 16b, in other words, on the construction side bordered by the joints 16b and 16b, the outer edges are welded by penetration welding or the like with their inner edges facing each other. .

The present invention is not limited to the above-described embodiment, but can be modified as follows. In the above description, a steel pipe type and a U type steel sheet pile have been described as examples, but the present invention is not limited thereto, and a Z type, a linear type, or an H type may be used. Further, it is considered that the present invention can be applied to not only steel sheet piles but also wooden sheet piles, concrete sheet piles and the like.

Further, not only the mounting plate and the water stopping member may be provided on all the sheet piles, but also if necessary, the mounting plate and the water stopping member may be provided on some of the sheet piles.

[0029]

According to the shut-off structure according to the first to sixth aspects, the mounting plates are fixed to the pair of sheet piles of the plurality of sheet piles so as to face each other, and the mounting plates are fixed to each other. Since a water-stopping member made of a flexible material such as rubber is stretched between them, it is possible to stop water leakage from the joint portion.

Further, the water-stopping member also bends according to the sheet pile,
Even when the sheet pile is bent, it is possible to perform perfect water stoppage.

In addition to the above-mentioned common effects obtained by the inventions of claims 1 to 6, the following effects can be obtained by the inventions of the respective claims.

According to the shut-off structure according to the fourth and sixth aspects, the mounting plates are fixed to the two pairs of sheet piles arranged alternately so as to face each other, and the water is stopped between them. Since the members may be provided, the cost can be reduced with a simpler configuration.

[0033] According to the construction method of the shut-off structure according to the seventh aspect, a plurality of sheet piles are erected on the ground in a row while joining these joint portions, and grout is attached to each joined joint portion. After that, the mounting plate is fixed to the pair of sheet piles facing each other, and the waterproofing member is stretched between them, so that it can be built in a short time and at low cost. Can be.

[Brief description of the drawings]

FIG. 1 is a plan view of a shutoff structure as one embodiment according to the present invention.

FIG. 2 is a sectional view taken along the line II.

FIG. 3 is an enlarged plan view of a portion indicated by an encircling line II.

FIG. 4 is a plan view showing only a pair of a mounting plate and a water blocking member in a further enlarged manner.

FIG. 5 is an enlarged plan view of a shutoff structure according to another embodiment of the present invention.

FIG. 6 is a plan view of a conventional shutoff structure.

FIG. 7 is a cross-sectional view taken along the line III-III.

[Explanation of symbols]

 Steel sheet piles 5a, 16a sheet piles 5a, 16a sheet pile body 5b, 16b joint part 6 mounting plate 7 water-stopping member G ground

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masahiro Shinobu No. 2, Sanbancho, Chiyoda-ku, Tokyo Tobishima Construction Co., Ltd. (72) Inventor Yuzo Suzumura No. 2, Sanbancho, Chiyoda-ku, Tokyo Tobishima Construction Co., Ltd. (72) Inventor Soichiro Shimizu 3-23-7 Shinjuku, Shinjuku-ku, Shinjuku-ku, Tokyo Tokyo Fabric Industry Co., Ltd. (72) Inventor Yoshiyuki Tanigawa 2-2-2 Matsuzakicho, Abeno-ku, Osaka-shi, Osaka Prefecture Okumura Gumi Co., Ltd. F term (reference) 2D018 BA15 2D049 EA03 FB01 FB03 FB05 FB12 FB14 FC02 FC03 FD04 FD08

Claims (7)

[Claims] In a shut-off structure in which a plurality of sheet piles are connected in a row via these joints, a mounting plate is respectively attached to two paired sheet piles of the plurality of sheet piles. A shutoff structure characterized by being fixed so as to face each other, and having a water blocking member made of a flexible material such as rubber stretched between their mounting plates. 2. The shutoff structure according to claim 1, wherein the mounting plate is fixed to the dry work side with the joint portion as a boundary. 3. The shutoff structure according to claim 1, wherein the pair of sheet piles are arranged adjacent to each other. 4. The shutoff structure according to claim 1, wherein two pairs of sheet piles are arranged alternately. 5. The shut-off structure according to claim 1, wherein the sheet pile is a steel pipe-shaped sheet pile. 6. The sheet pile according to claim 1, wherein the sheet pile is a U-shaped steel sheet pile.
5. The shutoff structure according to 2 or 4. 7. A plurality of sheet piles are erected on the ground in a row while joining these joints together, grouting is performed on each joined joint, and then the two sheet piles forming a pair. Wherein a mounting plate is fixed to each other so as to face each other, and a water blocking member is stretched between the mounting plates.