JP2008069566A - Movable impervious wall - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To propose a structure of a wall material of making both incompatible in buoyancy and strength, in a movable impervious wall arranged in the top end vicinity of a bank and preventing overflow water by vertically moving by the buoyancy. <P>SOLUTION: The wall material 1 is arranged in the bank so as to vertically move by the buoyancy in response to a variation in a water level, and is characterized by being formed by being fluid-tightly sealed, by combining a plurality hollow members 2 and 3 formed, for example, in a square pipe shape, in a plate shape. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a bank protection such as a dike, an embankment, and a waterway, and more particularly to a technique for preventing overflow at the time of water increase.

Patent Document 1 and Patent Document 2 describe a technique of installing a movable impermeable wall that moves up and down according to the water level in the vicinity of the top of a revetment such as a dike formed on a coast or a riverbank. These movable impermeable walls are installed so that one or more plate-like wall materials with buoyancy can be slid according to the water level. When the water level rises, The wall material protrudes upward from the top of the revetment to prevent overflow.
JP-A-10-298952 JP 2001-81751 A

  None of the above patent documents mentions the internal structure of the wall material that forms the impermeable wall, but it is actually a difficult problem to determine the structure of the wall material in the movable impermeable wall by buoyancy. It is. In other words, since the wall material moves up and down by buoyancy, it is essential to float on water (or seawater), but it must have strength to withstand the load caused by the water level that has increased beyond the revetment. It must be able to balance the functions that can be said.

  Therefore, the present invention proposes a wall material structure that achieves both buoyancy and strength for the movable impermeable wall.

  According to the present invention, in a movable impermeable wall formed by installing a wall material on a revetment so as to move up and down by buoyancy according to fluctuations in water level, the wall material forms a plurality of light metal hollow members in a plate shape. It is formed by combining and liquid-tight sealing. In addition, the wall material is formed by combining a plurality of plastic hollow members in a plate shape and liquid-tightly sealing. Alternatively, the wall material is formed by combining a plurality of light metal hollow members and plastic hollow members in a plate shape and liquid-tightly sealing.

  According to the movable water-impervious wall of the present invention, a plurality of hollow members are combined in a plate shape to form a wall material. Therefore, the side wall of each hollow member divides the interior of the wall material vertically and horizontally to form a bearing wall. Such a wall material structure can be obtained. Therefore, it is possible to obtain buoyancy that floats in water with a hollow structure, and it is possible to obtain a much higher strength than a simple whole box-shaped hollow structure or a wall material made of foam, thereby achieving both buoyancy and strength. .

FIG. 1 shows three types of wall material structures in the movable water-impervious wall according to the present invention. In the figure, arrow X indicates the plate thickness direction, and arrow Y indicates the vertical direction when it is installed on the embankment.
The wall material 1 of each example shown in FIG. 1 is formed by combining square pipe-shaped hollow members 2 and 3 into a plurality of plates, and the ends thereof are liquid-tightly sealed using welding or the like so that at least water cannot easily enter. Is formed. Of course, it is possible to achieve higher liquid-tight sealing and air-tight sealing by using packing or a sealant. Such liquid-tight sealing may be applied to each of the hollow members 2 and 3 or may be applied collectively at the time of assembly.

The hollow members 2 and 3 can be made of light metal such as aluminum or aluminum alloy, titanium or titanium alloy, or plastic, and the whole can be made of light metal or plastic, but the first row is made of light metal, It may be hybrid, for example, the second row is made of plastic.
In FIG. 1A, a square pipe-shaped hollow member 2 is used, and a large number of the hollow members 2 are stacked in the vertical direction Y sideways to form one row 4. And, such a row 4 is arranged in two rows in the plate thickness direction X. A plurality of rows 4, that is, a large number of hollow members 2 arranged in a matrix, are fixed so as not to collapse by being surrounded by a band material 5 made of metal or FRP (fiber reinforced plastic). . The number of columns to be arranged can be three or more in consideration of the amount of water.

  The wall material 1 thus formed floats in water with a bulk specific gravity of 0.9 ≧ ρ ≧ 0.1, while the side wall 2a of each hollow member 2 partitions the interior of the wall material 1 vertically and horizontally and has a strength. Work to make up the wall. That is, in the wall material 1, a large number of small rooms partitioned by the side walls 2a are formed, and the walls of the small rooms act as load-bearing walls, so that they are resistant to shearing force. Therefore, it is possible to obtain buoyancy that floats in water with a hollow structure, and to obtain much higher strength than a simple whole box-shaped hollow structure without the side wall 2a or a wall material made of foam.

  FIG. 1 (B) is an example in which the rectangular pipe-shaped hollow members 2 are used. The rows 4 are stacked in the vertical direction Y with the hollow members 2 being horizontally disposed, and the hollow members 2 are vertically disposed horizontally. The rows 6 arranged in the direction (see arrow Z in FIG. 3) are alternately arranged in the plate thickness direction X. In other words, the row 4 and the row 6 are configured so that the directions of the hollow members 2 are orthogonal to each other. Also with this structure, since the inside of the wall material 1 is partitioned into a large number of small rooms by the side walls 2a, the wall material 1 having high strength that floats on water can be obtained.

  FIG. 1C shows a square pipe-shaped first hollow member 2 similar to the above examples, and a square pipe-shaped second hollow member 3 having a smaller cross-sectional area than the first hollow member 2. It is an example used. The wall material 1 of this example has a first portion 7 in which two rows 3 of the first hollow members 2 stacked side by side in the plate thickness direction X are arranged side by side, and the second hollow member 3 is placed sideways. A second portion 9 in which four stacked rows 8 are arranged in the plate thickness direction X is provided above and below. The second hollow member 3 is ¼ of the cross-sectional area of the first hollow member 2, and two rows of the second hollow member 3 correspond to one row of the first hollow member 2.

  In the case of this example, a first portion 7 in which the first hollow members 2 are arranged in a matrix and a second portion 9 in which the second hollow members 3 are arranged in a matrix are vertically (vertically) Arranged in the direction Y), a coarse / dense structure is formed in which the first portion 7 is rough and the second portion 9 is dense. In the second portion 9, there are more load bearing walls due to the side walls 3 a of the second hollow member 3, so that the strength can be increased as compared with the first portion 7. That is, it is possible to obtain a double structure in which buoyancy is given by the coarser first part 7 and strength is given by the denser second part 9.

  The square-shaped hollow members 2 and 3 as described above are easy to combine vertically and horizontally (in the form of a matrix), and thus are suitable for forming the plate-like wall material 1. However, as shown in an example in FIG. 2, other hollow member shapes are possible. 2A is an example of a wall material 1 in which a hollow member 10 having a triangular cross section is combined, and FIG. 2B is an example of a wall material 1 in which a hollow member 11 having a round pipe shape is combined. FIG. 2C shows an example of a wall material 1 in which hollow members 12 having a hexagonal cross section are combined. In the example of FIGS. 2B and 2C, the arrangement of the hollow members 11 and 12 in the plate thickness direction X is changed from the case of FIG. 1 and is arranged in a honeycomb shape. It is also possible to arrange like this.

  3 and 4 show an example of construction on a dike. First, in the levee T where a movable impermeable wall is provided, a hole 20 is drilled at a position where a column 20 for supporting the wall material 1 so as to be movable up and down, and a corrosion-resistant anchor bolt 21 is attached to a polymer cement or an epoxy resin adhesive. And fix. Next, a column 20 having an H-shaped cross section such as H-shaped steel that sandwiches and supports the side edge of the wall material 1 is fixed to the fixed anchor bolt 21 with a nut 22 (FIG. 5). The column 20 is assumed to have been subjected to a corrosion-resistant material or rust prevention treatment, and a lower end stopper 23 for preventing the wall material 1 from falling off is formed by welding or the like at the lower end thereof. Further, a spacer 24 for hiding the head of the anchor bolt 21 and the nut 22 for fixing the column 20 so as not to be an obstacle when the wall material 1 slides is provided on the fixed wall portion 25 of the column 20. (Figure 5).

When the column 20 is fixed, a new base concrete 26 is placed. Since the base concrete 26 is post-placed after the support column 20 is fixed, it is possible to save labor and costs such as unevenness correction.
A guide roller 30, which is shown in detail in FIGS. 5 to 7, is attached to the fixed column 20 so as to contact the side end surface of the wall material 1. By providing this guide roller 30, the wall material 1 can slide smoothly. The guide roller 30 has a U-shaped bearing member 32 fixed to the groove bottom wall portion 27 of the support column 20 having an H-shaped section with bolts and nuts 31, and the shaft 34 of the roller 33 is pivoted on the bearing member 32. It is composed by supporting. When the guide roller 30 abuts on the side end surface of the wall material 1 and rotates, the wall material 1 can smoothly slide along the column 20.

After the columns 20 are erected at predetermined intervals, the wall material 1 is inserted between the columns 20. Then, an upper end stopper 28 for preventing the wall material 1 from coming off is formed on the upper end of the column 20 after the wall material 1 is inserted by welding or the like.
With the above construction method, a movable impermeable wall formed by installing the wall material 1 on the levee T so that both side edges can be slidably supported by the support column 20 and can be moved up and down by buoyancy according to fluctuations in water level. Created.

  Although the above construction example is a construction example for a revetment of a reinforced concrete embankment, in the case of a Tomori embankment, it is as shown in FIG. That is, first, a concrete base CB is newly installed at a predetermined portion of the levee, and a concrete wall for attaching the column 20 is newly installed. The column 20 is fixed to the concrete base CB with the anchor bolts and nuts as described above, and then the wall material 1 is installed by performing the same construction as described above. The back side of the new concrete wall should be filled with buried soil.

Sectional drawing which shows the structural example of the wall material which concerns on this invention. Schematic which illustrated the hollow member used for the wall material which concerns on this invention. The principal part front view which showed the construction example of the movable water-impervious wall which concerns on this invention. The principal part sectional drawing seen from the side explaining the fixed part of the support | pillar in the construction example of FIG. The partial expanded sectional view seen from the upper side explaining the guide roller provided in the support | pillar in the construction example of FIG. The partial expanded sectional view seen from the front explaining the guide roller provided in the support | pillar in the construction example of FIG. The partial enlarged view seen from the side explaining the guide roller provided in the support | pillar in the construction example of FIG. Schematic which showed the other construction example of the movable water-impervious wall which concerns on this invention.

Explanation of symbols

1 Wall material 2, 3, 10, 11, 12 Hollow member 5 Band material (go material)
20 props

Claims (6)

In a movable impermeable wall that has wall materials installed on the revetment so that it moves up and down by buoyancy in response to fluctuations in the water level,
The movable water-impervious wall, wherein the wall member is formed by combining a plurality of light metal hollow members in a plate shape and liquid-tightly sealing. In a movable impermeable wall that has wall materials installed on the revetment so that it moves up and down by buoyancy in response to fluctuations in the water level,
The movable water-impervious wall, wherein the wall member is formed by combining a plurality of plastic hollow members in a plate shape and liquid-tightly sealing. In a movable impermeable wall that has wall materials installed on the revetment so that it moves up and down by buoyancy in response to fluctuations in the water level,
The movable water-impervious wall, wherein the wall member is formed by combining a plurality of light metal hollow members and plastic hollow members in a plate shape and liquid-tightly sealing. Using the hollow member in the shape of a square pipe,
The movable water-impervious wall according to any one of claims 1 to 3, wherein two or more rows of the hollow members stacked side by side are arranged in the thickness direction. Using the hollow member in the shape of a square pipe,
The row formed by stacking the hollow members horizontally and the row formed by arranging the hollow members vertically are alternately arranged in the plate thickness direction. The movable impermeable wall as described in the item. Using the first hollow member in the shape of a square pipe and the second hollow member in the shape of a square pipe having a smaller cross-sectional area than the first hollow member,
A portion in which two or more rows of the first hollow members are stacked side by side in the plate thickness direction and two or more rows in which the second hollow members are stacked side by side in the plate thickness direction are arranged. The movable water-impervious wall according to any one of claims 1 to 3, wherein the movable water-impervious wall according to any one of claims 1 to 3 has a dense structure having upper and lower portions arranged side by side.

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