JP6253252B2 - Wall for temporary cut-off - Google Patents

Description

  The present invention relates to a temporary cutoff wall.

  When constructing a structure in water, temporary cut-off is performed, but conventionally, a construction using a steel sheet pile or a steel pipe sheet pile has been known (see Patent Document 1). For example, in a sluice reinforcement work, as shown in FIG. 5, the steel sheet pile 3 cannot be installed on the floor slab 2, so the sandbags 1 are stacked on the floor slab 2 to form a temporary cutoff wall. It is supposed to be. The sandbags 1 are stacked with a gradient on the surface so that more sandbags 1 are arranged on the lower side.

Japanese Patent Laid-Open No. 7-18668

  By the way, in the conventional temporary cutoff wall as shown in FIG. 5, since the sandbags 1 are only piled up and are not fixed to each other, there is a problem that the sandbags 1 may be washed away under the influence of water flow. there were. On the other hand, in order to prevent the sandbag 1 from flowing out, there are cases where a plurality of sandbags 1, 1... Are tied and connected with a rope, but the connecting work with the rope must be performed in flowing water. There was a problem that it took time and effort.

  From such a viewpoint, it is an object of the present invention to provide a temporary fastening wall capable of preventing sandbag outflow with easy construction.

The present invention for solving such a problem is a temporary closing wall for temporary closing, a sandbag laminate formed by arranging a plurality of sandbags filled with a filling material in a bag body on the water bottom, and A cover that covers the underwater side of the sandbag laminate, and an anchor material that extends from the cover to the sandbag laminate. The sandbag laminate includes a plurality of sandbag layers formed by arranging the sandbags in a horizontal direction. The anchor material is constructed by layering, and the anchor material is laid on the sandbag layer covered by the cover to which the anchor material is fixed, and is sandwiched between the sandbag layers adjacent to each other vertically In addition, the cover is a temporary cut-off wall that is made of a perforated plate or a net-like material .

According to such a configuration, since the anchor material is sandwiched between the sandbags and a frictional force is generated between the anchor material, the anchor material can be prevented from coming out and the cover is fixed by the anchor material. Therefore, since the cover can fix the sandbag laminate from the underwater side and integrate the temporary cutoff wall, it is possible to prevent the sandbag from flowing out due to the water flow. Furthermore, the temporary cut-off wall can be formed simply by repeating the step of installing the sandbag and then the step of installing the cover and the anchor material, so that the construction is easy. Moreover, since it becomes difficult to receive the resistance of water at the time of installation, construction becomes easy.

The invention according to claim 2 is a temporary closing wall for temporary closing, wherein the sandbag laminate is formed by arranging a plurality of sandbags in which a filling material is packed in a bag body on a water bottom, and the sandbag laminate A cover that covers the underwater side, an anchor material that extends from the cover to the sandbag laminate side, and a transverse material that connects adjacent anchor materials, and the sandbag laminate horizontally extends the sandbag. The sandbag layer is constructed by laminating a plurality of sandbag layers formed side by side, and the anchor material is laid on the sandbag layer covered by the cover to which the anchor material is fixed, and the sandbag layers adjacent to each other vertically The wall for temporary closing characterized by being pinched | interposed between each other.

According to the configuration like this, the anchor member is a frictional force between the sandbags is sandwiched sandbags occurs, it is possible to prevent the anchor material get out, the cover is fixed by an anchor member. Therefore, since the cover can fix the sandbag laminate from the underwater side and integrate the temporary cutoff wall, it is possible to prevent the sandbag from flowing out due to the water flow. Furthermore, the temporary cut-off wall can be formed simply by repeating the step of installing the sandbag and then the step of installing the cover and the anchor material, so that the construction is easy. Further, it becomes more difficult for the anchor material to come out of the sandbag laminate, and the temporary cutoff wall becomes stronger.

  ADVANTAGE OF THE INVENTION According to this invention, the temporary cutoff wall which can prevent the outflow of a sandbag can be formed by easy construction.

It is the principal part perspective view which showed the wall for temporary cutoffs concerning embodiment of this invention. It is the disassembled perspective view which showed the joining state of the cover and anchor material of the wall for temporary fastening which concerns on embodiment of this invention. It is the top view which showed the state of the temporary cutoff of the sluice reinforcement construction, and the wall for temporary cutoff. It is the side view which showed the wall for temporary cutoffs concerning embodiment of this invention. It is the top view which showed the conventional wall for temporary cutoff.

  Hereinafter, a temporary cutoff wall according to an embodiment of the present invention will be described with reference to the accompanying drawings. As shown in FIG. 3, the temporary cutoff wall 10 according to the present embodiment is constructed on the existing floor slab 2 where the steel sheet pile 3 cannot be driven and its adjacent region in the reinforcement work of the existing sluice. In addition, on the outer side of the floor slab 2, the steel sheet pile 3 is driven and the temporary cutoff is performed. In this embodiment, the temporary cutoff wall 10 is formed on both sides of the structure 4 constructed in the dry area, and the temporary cutoff wall 10 and the structure 4 are used for temporary cutoff.

  As shown in FIG. 1, the temporary cutoff wall 10 includes a sandbag laminate 11, a cover 20, and an anchor material 30. The sandbag laminate 11 is formed by arranging a plurality of sandbags 1. The sandbag 1 is formed by filling a filling material such as earth and sand in a bag body. The filling material is not limited to earth and sand, and may be other than earth and sand such as artificial materials. The sandbag 1 has, for example, a quadrangular prism shape or a cylindrical shape with chamfered corners. The sandbag laminate 11 is configured by arranging a plurality of sandbags 1, 1... Horizontally and vertically. In the present embodiment, the sandbag laminate 11 is constructed by laminating a plurality of layers (four in this embodiment) of sandbag layers 11 a formed by arranging the sandbags 1 in the horizontal direction. 4, as the sandbag layers 11a, 11a,... Become higher, the number of sandbags 1 arranged in the wall thickness direction (left and right direction in FIG. 4) decreases one by one and the wall thickness dimension becomes smaller. ing. The upper sandbag layer 11a is disposed on the center side in the wall thickness direction with respect to the lower sandbag layer 11a in a state offset by half the thickness of the sandbag 1.

  In addition, as shown in FIG. 3, the steel sheet pile 3 is arrange | positioned in the water stop width direction center of the temporary cutoff wall 10 in the outer side rather than the floor slab 2, but the large sandbag 1 is the place where the steel sheet pile 3 is arrange | positioned. When straddling (first and third stages), small sandbags 1a, 1a,... Are appropriately stacked to sandwich the steel sheet pile 3.

  As shown in FIG. 1, the cover 20 is a member that covers the underwater side of the sandbag laminate 11 (see FIG. 4), and is made of a perforated plate such as a punching metal. A net-like material (mesh-like material) such as expanded metal may be used. The cover 20 has a height slightly higher than that of the sandbag 1 and is provided for each sandbag laminate 11. The cover 20 is installed at the same height as the lower end of the sandbag 1, and the upper end of the cover 20 protrudes above the upper end of the sandbag 1. The cover 20 covers the two underwater surfaces of the sandbag laminate 11 (the outer surface of the dry area), and the protruding corners are chamfered, and the cover 20 is disposed obliquely.

  On the back surface of the cover 20 (the surface facing the sandbag laminate 11), an angle member 21 having an L-shaped cross section is provided as a reinforcing horizontal member. The angle member 21 serves to reinforce the cover 20 and to fix the anchor member 30. The angle member 21 extends in the horizontal direction and is welded to the back surface of the cover 20. The angle member 21 is attached to a height position corresponding to the upper end of the sandbag 1 corresponding to the anchor material 30 laid on the sandbag 1. As shown in FIG. 2, the angle member 21 is formed with a long hole 22 serving as a bolt hole for fixing the anchor member 30. The long hole 22 is formed long in the longitudinal direction of the anchor material 30, and the installation position of the anchor material 30 can be adjusted.

  As shown in FIG. 1, the anchor material 30 is a member that extends from the cover 20 toward the sandbag laminate 11 and is sandwiched between the upper and lower sandbags 1 and 1. The anchor material 30 is made of a metal plate such as flat steel and is bolted to the angle material 21 on the back surface of the cover 20. One anchor material 30 is arranged for each sandbag 1. The number of anchor members 30 may be changed as appropriate. Bolt holes 31 (shown only on the base end side that is the cover 20 side) are formed at both ends of the anchor material 30, respectively. The anchor member 30 has a base end portion placed on the upper surface of the angle member 21, and a bolt hole 31 (see FIG. 2) on the proximal end side of the anchor member 30 and a long hole 22 (see FIG. 2) of the angle member 21. The anchor member 30 is fixed to the cover 20 by inserting the bolt B and tightening with the nut N. The cover 20 has a length that is approximately 1.5 times the length of one side of the sandbag 1. The length of the anchor material 30 is not limited to the above length, and can be appropriately changed according to the speed of the water flow and the size of the cover 20.

  A transverse joint member 32 that connects adjacent anchor members 30 is connected to the distal end side (inner side) of the anchor member 30. The transverse joint member 32 is made of the same flat steel as the anchor member 30. The transverse member 32 is disposed so as to be parallel to the cover 20. Bolt holes (not shown) are respectively formed at the intersections of the transverse member 32 with the anchor member 30, and a plurality of anchor members 30, 30... Are bolted to the transverse member 32.

  As shown in FIG. 4, the upper sandbag layer 11 a and the cover 20 are placed on the anchor material 30 and the transverse joint material 32. Since the upper sandbag layer 11 a is arranged offset to the inside, the cover 20 is also arranged offset to the inside like the sandbag 1. The anchor material 30a placed on the uppermost sandbag layer 11a has a length that is approximately twice the length of one side of the sandbag 1, and its tip is bent downward. The distal end portion of the anchor material 30a is bent at a right angle and is locked to the side surface of the sandbag 1 on the dry area side. In addition, in the part where the steel sheet pile 3 is located in the wall thickness direction center part of the sandbag laminated body 11, the upper end of the steel sheet pile 3 is the same height as the upper end of the uppermost soil layer 11a, and the anchor The material 30 a passes over the steel sheet pile 3 and is locked to the side surface of the sandbag 1 on the dry area side. When the upper end of the steel sheet pile 3 is higher than the upper end of the uppermost soil layer 11a, the end of the anchor material 30a may be welded to the steel sheet pile 3.

  As shown in FIG. 3, the upper and lower covers 20, 20 are not interfered with each other by the portion located at the end portion (upper and lower end portions in FIG. 3) in the direction perpendicular to the wall thickness direction of the temporary cutoff wall 10 (the cover). The upper cover 20 is offset inward by about 20 thicknesses).

  According to the temporary cutoff wall 10 having such a configuration, since the cover 20 covers the sandbag laminate 11, the outflow of the sandbag 1 due to the water flow can be prevented. In particular, the anchor material 30 is sandwiched between the upper and lower sandbag layers 11a, 11a, and a frictional force is generated between the anchor material 30 and the sandbag 1, so that the anchor material 30 can be prevented from coming out. As a result, the cover 20 can be fixed to the sandbag laminate 11 via the anchor material 30, and the cover 20 can fix the sandbag laminate 11 from the underwater side and integrate the temporary cut-off wall 10. Can be surely prevented.

  Furthermore, since the distal end portion of the anchor member 30 is connected by the transverse member 32, the entire length direction of the transverse member 32 opposes the extraction of the anchor member 30. Therefore, the anchor material 30 is more difficult to come out of the sandbag laminate 11, and the temporary cutoff wall 10 is strengthened.

  On the other hand, the temporary cut-off wall 10 having the above-described configuration only repeats the step of arranging the sandbags 1 to form the sandbag layer 11a, and then the step of installing the cover 20 and the anchor material 30 along the sandbag layer 11a. Since it can be formed by, construction is easy. At this time, it is preferable that the cover 20, the anchor member 30, and the cross joint member 32 are easily joined on the ground and then immersed and installed. Here, since the cover 20 is composed of a perforated plate, it becomes difficult to receive resistance due to the water flow at the time of submerged installation, and the construction is further facilitated.

  Since the anchor material 30 is configured by a metal plate and is bolted to the angle material 21 provided on the cover 20, the anchor material 30 can be easily attached to the cover 20. Further, the cover 20 is reinforced by an angle member 21.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not the meaning limited to the said embodiment, A design change is possible suitably in the range which does not deviate from the meaning of this invention. For example, in the said embodiment, although the anchor material 30 is formed with the flat steel, it is not limited to this. For example, a flat plate with irregularities formed on the surface may be used. The irregularities are preferably formed in a direction perpendicular to the longitudinal direction of the anchor material. According to such a configuration, the anchor material 30 becomes more difficult to pull out.

1 Sandbag 10 Temporary Wall 11 Sandbag Laminate 11a Sandbag 20 Cover 21 Angle Material (Reinforced Horizontal Material)
30 Anchor material 32 Transverse material

Claims (2)

A temporary cutoff wall for performing a temporary cutoff,
A sandbag laminate formed by arranging a plurality of sandbags filled with filling material in a bag body on the bottom of the water, a cover that covers the underwater side of the sandbag laminate, and an anchor material that extends from the cover to the sandbag laminate side. With
The sandbag laminate is constructed by laminating a plurality of sandbag layers formed by arranging the sandbags in a horizontal direction,
The anchor material is laid on the sandbag layer covered by the cover to which the anchor material is fixed, and is sandwiched between the sandbag layers adjacent to each other vertically,
The cover is made of a perforated plate or a net-like material. A temporary cutoff wall for performing a temporary cutoff,
A sandbag laminate formed by arranging a plurality of sandbags filled with a filling material in a bag body on the bottom of the water, a cover covering the underwater side of the sandbag laminate, an anchor material extending from the cover to the sandbag laminate side, It is equipped with a transverse material that connects adjacent anchor materials,
The sandbag laminate is constructed by laminating a plurality of sandbag layers formed by arranging the sandbags in a horizontal direction,
The anchor material is laid on the sandbag layer covered by the cover to which the anchor material is fixed, and is sandwiched between the sandbag layers adjacent to each other in the vertical direction. wall.

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