JP2015151669A - Reinforcement soil wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcement soil wall for constructing a reinforcement soil wall by laying sandbags with little gaps or concavity and convexity on the face of the piled sandbags to prevent deterioration of the sandbags due to accumulated foreign matters while achieving satisfactory visual quality of reinforcement soil wall face.SOLUTION: A square cylindrical sandbag is formed by filling a filler in a container bag with a partition piece which extends side faces being interposed by corners inside of the square cylindrical sandbag. Square cylindrical sandbags are placed in a row or plural rows in closed contact with each other on the ground; and a reinforcement soil wall is constructed by piling the square cylindrical sandbags in several steps.

Description

  The present invention provides a reinforced earth wall formed by filling a large flexible container bag (hereinafter abbreviated as “container bag”) with a filling material such as earth and sand to form a sandbag, and laying it on the ground. About.

  The temporary construction and disaster recovery works for roads and rivers are carried out by the laminating method using large weather-resistant sandbags, and earth retaining structures such as steep banking are used as permanent structures. Geotextile (net-like reinforcing material) is laid on the ground, and the structure is reinforced by a geotextile that increases the strength by interacting with the soil piled on it.

As a weathering sandbag used in the laminating method or a banking material for geotextiles, a circular tubular bag or a bottomed cylindrical container bag is used (for example, see Patent Documents 1 and 2).
In addition, when the earth retaining structure is constructed by geotextiles, wall materials are installed at the end of the slope side of the embankment so that the slopes close to vertical can be stored neatly, and these are surrounded by geotextiles. Reinforcing the embankment is performed (see, for example, Patent Documents 3 and 4).

JP 2010-203114 A JP 2004-84183 A JP 2005-315011 A JP 2012-219521 A

  Sandbags formed by packing sand and sand into circular tubular or cylindrical container bags have a cylindrical shape with an expanded outer periphery, and when these are spread in rows on the ground, they are recessed to the back between the sandbag and sandbag. There is a step. Even in the current container bag formed in a square shape, when the earth and sand are filled, the peripheral surface swells into a cylindrical shape.

When a reinforced soil wall is constructed by stacking cylindrical sandbags as a temporary structure, it looks bad if the soil wall surface is uneven, and if there are steps on the soil wall surface, foreign matter accumulates. It is easy to get caught and damage the sandbag surface.
Temporary structures are temporarily installed only until the start of the construction work, but it takes several years for the construction work to start, and installation of temporary structures often takes a long time. In the meantime, it is preferable that the appearance of the temporary structure is well-viewed so as not to adversely affect the surrounding landscape. Moreover, it is preferable to provide in the shape where a foreign material does not accumulate easily so that the laid sandbag may not deteriorate.

In addition, when the earth retaining structure is configured for geotextile work, if a cylindrical sandbag is used as the embankment material, a step is formed on the slope between the sandbag and the sandbag, which makes the appearance worse.
When storing the slope of the earth retaining structure vertically, install a wall material at the end of the slope as described above so that the step between the sandbags and the outer peripheral surface that bulges outside the sandbag is not exposed. It is necessary to cover the surface of the sandbag or to fill the stepped portion with mortar to finish the outer peripheral surface of the adjacent sandbag to a smooth surface.

  In view of such problems of the prior art, the present invention is configured so that a step or unevenness between adjacent sandbags formed on the surface of a sandbag row spread as small as possible when a sandbag is spread to form a reinforced soil wall. It is an object to prevent the sandbag from being deteriorated due to the accumulation of foreign substances and to improve the appearance of the surface of the reinforced soil wall.

As described above, even if a sandbag is formed using a rectangular container bag instead of a cylindrical one, in the present situation, when the sand is filled, the peripheral surface of the body of the container bag swells into a cylinder or barrel shape. Thus, when sandbags are laid down, there will be a step between adjacent sandbags.
Therefore, in the present invention, a sandbag is formed using a container bag configured to be held in a square shape even when the inside is filled with a filling material, and this is spread on the ground to form a step in the sandbag row. Reinforced soil walls with small and uneven surfaces and a substantially smooth surface were constructed.

  That is, the reinforced earth wall of the present invention is formed by packing the filling material in the container bag in which the partition pieces straddling the side surfaces on both sides of the corner portion are respectively attached to the inside of the four corner portions of the quadrangular tubular body. The rectangular sandbags are spread in one or a plurality of rows on the ground, and the square sandbags are spread on the ground and stacked in a plurality of stages.

According to this, inside the four corners of the body part of the container bag, the partition pieces are arranged so as to straddle the corners horizontally, and both ends of the partition pieces are fixed to the side surfaces of the body parts on both sides of the corner parts. Therefore, when the container bag is filled with the filling material, even if the outward pressure of the filling material is applied to the peripheral side surface of the trunk portion, the side surfaces on both sides of the corner portion do not spread outward. The part is held at a substantially right angle, and the body side surface is prevented from deforming so that it swells outward, and the contents fill the space of a substantially right triangle in plan view inside the corner divided by the partition pieces. As a result, the container bag is held in a square shape.
Therefore, filling the container bag with a filling material to form a square sandbag, laying it in one or more rows on the ground, and further stacking the square sandbag on it, the adjacent sandbag and sandbag A reinforced soil wall having no steps and a smooth surface can be formed.
The reinforced soil wall with the above structure is installed with the adjacent sandbags in close contact with each other, so there is no step or unevenness on the surface, and even if the step or unevenness appears, the appearance is very small. The flat surfaces intersecting at right angles such as stacked square blocks are emphasized, and it is difficult to deposit or catch foreign objects between the sandbags and the sandbags deteriorate with the accumulation of foreign objects. Can be prevented.

The reinforced earth wall of the present invention lays a geotextile on the ground, and on both sides of the corners on the inside of the four corners of the rectangular tubular body on the geotextile and inside the front end thereof. The square sandbags formed by stuffing the filling material into the container bags to which the partition pieces straddling the side of each are attached are laid in one or more rows, and the soil is piled up on the ground behind the laid square sandbags, After the surface is spread and pressed, the front end side of the geotextile is folded back to the back of the square sandbag, wound from the front to the top of the square sandbag, and the end folded back to the upper surface of the embankment. Fixed to form a first reinforced earth wall on the ground,
Next, a geotextile is laid on the upper surface of the first reinforced earth wall, and the square sandbags are laid in one or more rows on the geotextile and at a position inside the front end portion, and the laid-out square sandbags. The soil is piled on the first reinforcing soil wall at the rear, and the surface is spread and rolled, and then folded back to the square sandbag covering the front end side of the geotextile, from the front to the upper surface of the square sandbag. The second reinforcing earth wall is formed on the first reinforcing earth wall by fixing the end part that is wound over and folded back to the upper surface of the embankment.

According to this, the wall surface of the reinforced soil wall on which the geotextile is wound has no step or unevenness between the sandbag and the sandbag, and becomes a smooth surface that intersects the ground almost perpendicularly. By laminating the reinforced earth walls, it is possible to form a soil retaining structure whose wall surface portion is substantially vertical.
Since there are no steps or irregularities on the wall of the reinforced soil wall, when the slope of the retaining structure is stored vertically, a wall material covering the steps or irregularities can be installed at the edge of the slope, or mortar can be applied to the step. There is no need to fill it with a smooth surface. Of course, in order to reinforce along the slope, a wall surface material may be installed on the wall surface of the reinforced soil wall, or mortar may be filled and hardened along the wall surface.

  In the reinforced earth wall having the above-described configuration, a container bag having a configuration in which a plurality of strip-shaped partition pieces are fixedly spaced from each other from the upper end to the lower end of the corner portion can be used.

According to this, inside the four corners of the body portion of the container bag, a plurality of partition pieces are attached at appropriate intervals from the upper end to the lower end of the corner portion. Even when soil and sand containing lumps are packed, the sand and sand can smoothly enter the space inside the corner through the gap between the upper and lower partition pieces, and can be packed into the four corners of the trunk without any problems. . When the earth and sand are fully filled, there is no gap in the space inside the corner of the container bag, and the corner is not crushed or curved, and the container bag is held in a square shape.
In this case, the arrangement interval (S) of the partition pieces from the upper end to the lower end of the corner portion is set so that the contents smoothly enter the entire space inside the corner portion partitioned by the partition pieces. It is preferable that the width is approximately the same as the short width (W) (S≈W) (see FIG. 7).

The container bag constituting the square sandbag can be formed using a sheet and a belt woven with synthetic fibers such as polypropylene, polyethylene, and polyethylene terephthalate. Appropriate means such as sewing, heat fusion, and adhesion can also be used for fastening the sheets constituting the trunk and bottom of the container bag and fastening the suspension belt to the trunk. When the reinforced earth wall of the present invention is configured as a temporary structure, the suspension belt is provided inside the trunk of the container bag so that the fastening portion of the suspension belt of the container bag is not deteriorated by receiving ultraviolet rays. It is preferable that it is fixed.
In addition, when the present invention is applied and the weatherproof large sandbag stacking method is implemented for emergency temporary work or disaster recovery work on roads and rivers, sandbags formed by filling container bags with packing materials are generally It has performance that satisfies the strength, deformation characteristics, durability, drainage and water permeability, etc. stipulated in "Design and Construction Manual for Weatherproof Large Soil Laminating Method" published by the Civil Engineering Research Center. It is preferable.

  According to the reinforced soil wall of the present invention, the adjacent sandbags are installed with the entire side surfaces in close contact with each other, so there are no steps or irregularities on the surface, even if the steps or irregularities are exposed, Appearance is emphasized by the plane that intersects at right angles, such as stacked square blocks, and it is difficult for foreign matter to accumulate or catch between the sandbag and the sandbag deteriorates as the foreign material accumulates. This can be effectively prevented.

It is an external view of the sandbag which comprises the reinforced earth wall of this invention. It is an external view of the container bag of one Embodiment which forms the sandbag of FIG. It is a cross-sectional view of the container bag of FIG. It is the figure which expanded and showed the structure of the corner | angular part of the trunk | drum of the container bag of FIG. (A), (B) is a figure for demonstrating the process of manufacturing the container bag of FIG. It is an external view of the container bag of the other form which forms the sandbag of FIG. It is a figure for demonstrating the process of manufacturing the container bag of FIG. It is the figure which showed an example of the reinforced earth wall of this invention. (A)-(F) is a figure for demonstrating the process of comprising a reinforced earth wall by geotextile construction.

Preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a square sandbag constituting the reinforced soil wall of the present invention, and this square sandbag SB is formed by filling the square container bag 1 shown in FIG. In this state, the outer peripheral surface is held in a square in plan view with the container bag 1 filled with earth and sand.

  As shown in FIG. 2, the container bag 1 is formed in a cylindrical shape on the inner peripheral edge of the upper opening of the trunk portion 2 by stitching the bottom portion 3 together and closing the lower portion of the rectangular barrel portion 2 whose upper and lower sides are opened in a square in plan view. Are formed by integrally stitching the partitioning piece 5 and the suspension belt 6 bent in a ring shape inside the four corners 21 of the trunk portion 2. In the figure, reference numeral 8 is a binding tape provided integrally on the outer surface of the insertion portion 4.

Specifically, as shown in FIG. 2 and FIG. 3, the four corner portions 21 of the body portion 2 are respectively provided with vertically long partition pieces 5 extending from the vicinity of the upper end of the corner portion 21 to the vicinity of the lower end thereof. 21 is arranged so as to straddle between both side surfaces 22 and 22 adjacent to each other, and both end portions 51 and 51 are sewn and attached to the inner surfaces of the side surfaces 22 and 22, and the corner at the position where the partition piece 5 is attached. The inner portion of the portion 21 is provided in a shape partitioned into a space of a substantially right-angled triangle in plan view by both side surfaces 22 and 22 sandwiching the corner portion 21 and the partition piece 5.
The suspension belt 6 is folded in half at the four corners 21 of the body 2, and both ends thereof are inserted inside the side surfaces 22, 22 on both sides of the corner 21, and from the lower part of the body 2. It is sewn to the inner surfaces of the side surfaces 22, 22 extending over the upper part, and is integrally attached to the inside of the corner portion 21.

  The partition piece 5 has both ends 51, 51 having an appropriate connection width, and as shown in FIG. 4, equidistant from the corner portion 21 of the body portion 2 to the side surfaces 22, 22 on both sides thereof. The both end portions 51, 51 are overlapped and sewn on the inner surfaces of the side surfaces 22, 22 at the opened position.

As shown in FIG. 4, the suspension belt 6 has both end portions inserted inside the corner portion 21 overlapped inside the both end portions 51, 51 of the partition piece 5, and the corner portion 21 together with the partition piece 5. Are sewn on the inner surfaces of the side surfaces 22 and 22.
The four suspension belts 6 attached to the inside of the four corner portions 21 of the trunk portion 2 are two suspension belts 6 and 6 attached to the adjacent corner portions 21 and 21 respectively. The other two suspension belts 6 and 6 are connected to each other by connection suspension belts 7 and 7, respectively, and both connection suspension belts 7 and 7 are suspended by a crane to transfer the square sandbag SB. It is provided so that it can do (refer FIG. 1).

  For example, as shown in FIG. 5 (A), the partition piece 5 and the suspension belt 6 are attached to the corners 21 at both end portions 51 of the partition piece 5 on the suspension belt 6 folded in a ring shape. 51 is sewn together, and as shown in FIG. 5B, the partition piece 5 and the suspension belt 6 are arranged so as to straddle the corner portion 21, and are superimposed on the inner surfaces of the side surfaces 22 and 22. In this state, the suspension belt 6 together with each partition piece 5 can be sewn to both side surfaces 22 and 22.

6 and 7 show another form of the container bag 1, in which a plurality of horizontally long partition pieces 5 are attached inside the four corners 21 of the trunk portion 2 instead of the vertically long partition pieces 5. Is.
Specifically, the illustrated container bag 1 has corner portions 21 inside the four corner portions 21 of the body portion 2 at equal intervals from the upper end to the lower end of the corner portions 21 and with the longitudinal direction being horizontally horizontal. Three strip-shaped partitioning pieces 5 arranged so as to straddle between both side surfaces 22 and 22 adjacent to each other are attached by sewing both end portions 51 and 51 to the inner surfaces of the side surfaces 22 and 22, respectively. In addition, the inner portion of the corner portion 21 at the position where each partition piece 5 is attached is provided in a shape partitioned into a space of a substantially right-angled triangle in plan view by both side surfaces 22 and 22 sandwiching the corner portion 21 and the partition piece 5. is there. The suspension belt 6 is integrally attached to the inside of each of the four corner portions 21 and the two suspension belts 6 and 6 are connected by the connection suspension belt 7 in the same manner as in the above embodiment.

As shown in FIG. 7, the three partition pieces 5 attached from the upper end to the lower end of the corner portion 21 have an upper and lower arrangement interval (S) equal to the length of the short width (W) of the partition piece 5. They are set so as to be substantially the same (S≈W).
For example, as shown in FIG. 7, the partition piece 5 and the suspension belt 6 are attached to each corner 21 by three pieces arranged in parallel at equal intervals on the suspension belt 6 folded in a ring shape. In a state where both end portions 51, 51 of the partition piece 5 are sewn together, and the partition pieces 5 and the suspension belt 6 are arranged so as to straddle the corner portions 21, and are superposed on the inner surfaces of the side surfaces 22, 22. The suspension belt 6 together with each partition piece 5 can be sewn to both side surfaces 22 and 22.

  The square sandbag SB shown in FIG. 1 is filled with earth and sand from the upper opening of the charging portion 4 of the container bag 1 configured as described above into the trunk portion 2 and filled up to the upper end of the trunk portion 2. Then, it can be formed by closing the opening portion 4 by narrowing the opening portion 4 and closing the inside of the body portion 2 by binding the binding tape 8 wound around the outer periphery of the insertion portion 4 narrowed narrowly.

When the earth and sand are packed in the container bag 1, the pressure of the earth and sand is applied outwardly to the peripheral side surface of the trunk portion 2, but the partition piece arranged so as to straddle the corner portion 21 inside the four corner portions 21 of the trunk portion 2. 5 is attached, the side surfaces 22 and 22 on both sides of the corner portion 21 do not expand, and the contents are filled into a space in a substantially right triangle in plan view partitioned by the partition piece 5 inside the corner portion 21. The sandbag SB is held in a square shape.
As in the container bag 1 shown in FIG. 6, if a plurality of partition pieces 5 are attached to the inside of each corner portion 21 from the upper end to the lower end with appropriate intervals, the earth and sand including large and small chunks can be obtained. When filling the container bag 1, the earth and sand can smoothly enter the space inside the corner 21 through the gap between the upper and lower partition pieces 5 and 5, and can be packed into the four corners 21 of the trunk 2 without any problems. Is possible. When the container bag 1 is fully filled with earth and sand, there is no gap in the space inside the corner portion 21, and the corner portion 21 is not crushed or curved.
Further, since the suspension belt 6 is attached to the inside of the corner portion 21 of the trunk portion 2, even if the square sandbag SB is installed outdoors for a long period of time, the attachment portion of the suspension belt 6 is directly irradiated with ultraviolet rays. Therefore, it is possible to prevent the attachment portion from being deteriorated by receiving ultraviolet rays, and to safely transfer the square sandbag SB by suspending the suspension belt 6 or the connection suspension belt 7 with a crane.

FIG. 8 shows a reinforced soil wall constituted by using a square sandbag SB, which is spread on one or a plurality of rows of square sandbags SB on a flat ground G. The mold sandbag SB is spread and the square sandbag SB is stacked in a plurality of stages.
The reinforced soil wall configured in this way has a stepped appearance and an uneven appearance on the surface of the spread square sandbags SB row, and the wall surface portion intersects the ground G substantially perpendicularly.

Moreover, FIG. 9 has shown the process of comprising a reinforced earth wall by geostyle work.
As shown in the figure, first, a geotextile geo is laid on the ground G (FIG. (A)), and a square sandbag SB is laid on the geotextile geo in one or more rows (FIG. (B)). . At this time, the square sandbag SB is installed at a position inside the front end of the geotextile geo.
Next, the soil is piled up on the ground G behind the spread square sandbag SB ((C) in the figure). When the surface of the embankment is spread and pressed, the front end side of the geotextile geo is folded back to the back of the square sandbag SB and wound from the front to the top of the square sandbag SB, and the end folded back Is fixed to the upper surface of the embankment ((D) in the same figure), and further, the soil is heaped thereon. The surface is spread and leveled to form a first reinforced soil wall (FIG. (E)).
Then, the geotextile geo is laid on the upper surface of the first reinforced soil wall, and the square sandbags SB are laid in one or a plurality of rows on the geotextile geo and on the inner side of the front end (FIG. (F)). ) After that, in the same manner as described above, the soil is piled up on the first reinforcing soil wall behind the spread square sandbag SB, the surface is spread and rolled, and the front end of the geotextile geo is spread. Fold back to the back of the mold sandbag and wrap around the square sandbag SB from the front to the top, and fix the end folded back to the top of the embankment. A reinforced earth wall can be formed, and similarly, the third and fourth reinforced earth walls can be stacked to form a reinforced earth wall at an appropriate height.
According to this, the wall surface of the side of the reinforced soil wall on which the geotextile is wound has no step or unevenness between the square sandbag SB and the square sandbag SB, and becomes a smooth surface that intersects the ground substantially perpendicularly. Therefore, by laminating the reinforced soil wall while winding the geotextile geo, it is possible to configure an earth retaining structure having a substantially vertical wall surface.

  Note that the illustrated reinforced earth wall, square sandbag, and container bag are examples of embodiments of the present invention, and the present invention is not limited to these, and can be configured in other appropriate forms. .

DESCRIPTION OF SYMBOLS 1 Container bag, 2 trunk | drum, 21 corner | angular part, 22 side surface, 3 bottom part, 4 input part, 5 partition piece, 6 suspension belt, 7 connection suspension belt, 8 binding tape, SB square sandbag, G ground, geo geotextile

Claims (3)

  A square sandbag formed by stuffing a filling material into a flexible container bag with partition pieces straddling the sides on both sides of the corner inside the four corners of the square cylindrical body, on the ground A reinforced soil wall having a configuration in which the square sandbags are stacked on one or more rows. A geotextile is laid on the ground, and on this geotextile, on the inner side of the front end, partition pieces are attached to the sides of both sides of the corners inside the four corners of the square cylindrical body. After laying the square sandbags formed by packing the filling material into a flexible container bag in one or more rows, placing the soil on the ground behind the spread square sandbags, spreading the surface, rolling and compacting Fold back to the back of the square sandbag covering the front end side of the geotextile and wrap it from the front surface to the top surface of the square sandbag and fix the back end to the top surface of the embankment to fix the first on the ground. Forming a reinforced earth wall,
Next, a geotextile is laid on the upper surface of the first reinforced earth wall, and the square sandbags are laid in one or more rows on the geotextile and at a position inside the front end portion, and the laid-out square sandbags. The soil is piled on the first reinforcing soil wall at the rear, and the surface is spread and rolled, and then folded back to the square sandbag covering the front end side of the geotextile, from the front to the upper surface of the square sandbag. A reinforced soil wall having a configuration in which a second reinforced soil wall is formed on the first reinforced soil wall by fixing an end portion that is wound over and folded back to the upper surface of the embankment. The reinforcement earth wall according to claim 1 or 2 using a flexible container bag of the composition where a plurality of strip-like partition pieces were fixed at intervals from the upper end to the lower end of the corner.

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