Sandbags and their manufacturing methods, sandbag structures and their construction methods

Abstract

To provide a sandbag capable of reducing gaps between neighboring sandbags and having excellent strength.SOLUTION: A sandbag comprises: an outer bag body 2 having a rectangular cylindrical body portion 4; an inner bag body 3 placed inside the outer bag body 2 and containing granular material inside; and a corner side space 14 provided between a corner 12 of the outer bag body 2 and the inner bag body 3 and filled with a solidifiable filler 41. By filling the corner side space 14 of the corner 12 of the outer bag body 2 with the solidifiable filler 41, gaps between neighboring sandbags 1 can be reduced, and strength of the sandbag 1 is improved by the solidified solidifiable filler 41. In addition, by providing a spacer 43 between the body portion 4 of the outer bag body 2 and the body portion 21 of the inner bag body 3 in the corner side space 14, the corner 12 can be more securely held and the corner side space 14 can be secured.SELECTED DRAWING: Figure 17

Description

[Technical Field]

[0001] The present invention relates to a sandbag and a method for manufacturing the same, as well as a sandbag structure and a method for constructing the same. [Background technology]

[0002] Conventionally, this type of sandbag structure has been constructed as a stacked sandbag structure in which multiple sandbags are lined up and stacked, with multiple rows of sandbag groups each consisting of a large number of sandbags lined up in a row, and with a lower group of sandbags and an upper group of sandbags placed above them, the sandbags that make up the lower group of sandbags and the sandbags that make up the upper group of sandbags are tied together horizontally, alternating up and down, with tie belts (for example, Patent Document 1).

[0003] In the sandbag structure, the strength of the whole structure is increased by connecting and integrating multiple sandbags, but because the sandbags are filled with pebbles, gravel, or other filler material, if the sandbags are exposed and an impact is applied to each individual sandbag, the bag is susceptible to damage such as rupture. Also, because the sandbags are cylindrical, when the sandbags are stacked, gaps occur between the lined up sandbags, and in order to ensure strength, it is necessary to fill these gaps with a filler material or the like.

[0004] In contrast to this, there is a reinforced earth wall (for example, Patent Document 2) constructed by laying square sandbags, which are formed by filling container bags with filling material and each of which has a partition piece attached to the inside of the four corners of a square cylindrical body, on the ground in one or more rows, and then laying the square sandbags on top of them and stacking them in multiple layers.

[0005] In the case of the square sandbag, when the container bag is filled with filler material, even if outward pressure from the filler material is applied to the peripheral side of the body, the sides on both sides of the corners do not expand outward, and the corners are maintained at approximately right angles, preventing the peripheral side of the body from deforming and bulging outward.Furthermore, the container bag is maintained in its square shape by filling the space inside the corner, which is approximately a right-angled triangle in plan view and is separated by a partition piece.

[0006] Therefore, in a sandbag structure using the above-mentioned square sandbags, gaps between the sandbags are reduced and the structure is highly stable, but simply stacking the sandbags can result in a lack of overall strength.

[0007] Furthermore, at sites where riverbanks have been damaged by heavy rain or other factors, sandbags are stacked on top of each other to form a retaining wall, and the backsides are backfilled to make emergency repairs to the bank, and sandbags are used as temporary structures. However, because the bag body that forms the surface of the sandbag is vulnerable to impacts, cloth formwork (e.g., Patent Document 3) is sometimes used to protect the surface.

[0008] When the fabric formwork is used for the sandbag structure or the reinforced earth wall, construction involves stacking the sandbags, then surveying the site, creating an unfolded drawing, and then sewing the fabric formwork to fit the drawing. This means that it takes about two weeks to deliver the fabric formwork to the site, and then it takes another three to four days to stretch the fabric formwork in front of the sandbags and inject mortar, which means that the construction time required to complete the temporary or permanent construction is long. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-75463 [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-151669 [Patent Document 3] Patent No. 6539003 Summary of the Invention [Problem to be solved by the invention]

[0010] Therefore, the present invention aims to provide sandbags that can reduce the gaps between adjacent sandbags and have excellent strength, as well as a manufacturing method thereof, and also aims to provide a sandbag structure that can shorten the construction period and a construction method thereof. [Means for solving the problem]

[0011] The invention according to claim 1 is Open top with four side panels Square cylindrical Outer bag torso and a bottom portion that closes the lower portion of the outer bag body. an outer pouch body; and a container placed inside the outer pouch body. Inner bag body The inner bag contains granular material and is filled with a solidifying filler. Corner side filling space and central filling space and The outer pouch is provided with partition walls on the inside of the four corners of the outer pouch body, each partition wall spanning the side surfaces on both sides of the corner, and both widthwise end edges of the partition walls are attached to the inner surfaces of the side surfaces on both sides of the corner by stitching, the space between adjacent stitching parts in one of the side surfaces is the side surface center, the space between the stitching part and the corner in one of the side surfaces is the side surface corner side, the inside part of the corner is the corner side filling space partitioned by the side surface corner side on both sides sandwiching the corner and the partition walls, the part of the outer pouch surrounded by the four side surface centers and the four partition walls is a storage section for storing the inner pouch, the center side filling space is provided between the inner pouch body and the side surface centers of the inner pouch stored in the storage section, and a gap is formed between the lower edge of the partition wall and the bottom. It is characterized by:

[0012] The invention according to claim 2 is as follows: The corner side Filled into the filling space The aforementioned The hardening filler has hardened Corner side Filler solidification section and a central filler solidified portion formed by solidifying the solidifiable filler filled in the central filling space, and the central filler solidified portion and the corner-side filler solidified portions on the left and right sides of the central filler solidified portion are continuous with each other. It is characterized by:

[0013] Also, claims 3 The invention relates to the above Corner side In the filling space, A flat rectangular plate with a long vertical length. Spacers are provided. One vertical edge of the spacer is in contact with the inner surface of the corner, and the other vertical edge of the spacer is in contact with the center in the width direction of the outer surface of the partition wall. It is characterized by:

[0014] Also, claims 4 The invention according to the present invention is as follows: 3 In the method for manufacturing a sandbag according to any one of the preceding claims, after the granular material is placed in the inner bag body, the inner bag body is placed in the outer bag body, and Corner side filling space and the central filling space The solidifying filler is filled into the cavity.

[0015] Also, claims 5 The invention according to claim 2 is characterized in that a plurality of the sandbags are arranged in a line.

[0016] Also, claims 6 The invention according to claim 5 In the construction method of the sandbag structure described above, after arranging the plurality of sandbags, Corner side filling space and the central filling space The solidifying filler is filled into the cavity. [Effects of the Invention]

[0017] According to the configuration of claim 1, the corners of the outer bag body side filling space and central filling space By filling the sandbags with a hardening filler, the gaps between adjacent sandbags can be reduced and the hardened filler increases the strength of the sandbags. In this case, when the corner filling space is filled with the solidifiable filler, the solidifiable filler passes through the gap at the bottom and is filled into the center filling space. Even if outward pressure is applied from the bag to the side of the outer bag and the partition, the partition prevents the side of both corners from expanding outward, and the corners are maintained at approximately right angles. 。

[0018] According to the configuration of claim 2, Corner side Filler solidification section and central filler solidification section This increases the strength of the sandbag.

[0019] Claim 3 According to the configuration of By spacer The corners are securely held, ensuring a filling space.

[0020] Claim 4 According to the configuration of (1), when the granular material is directly placed in the outer bag, even if the filling space inside the outer bag is partitioned, the granular material is likely to enter the filling space when placed from the top opening. However, since the granular material is not placed directly in the outer bag, but the inner bag containing the granular material is placed in the outer bag, the corners are easily opened. side Filling space can be secured.

[0021] Claim 5 According to the configuration, by using sandbags having excellent strength, a sandbag structure having excellent strength can be obtained.

[0022] Claim 6 According to this configuration, the sandbag structure can be constructed in a short construction period. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a cross-sectional view of a sandbag structure showing a first embodiment of the present invention. [Figure 2] FIG. [Figure 3] FIG. [Figure 4]FIG. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] FIG. 10 is a cross-sectional view showing the anchor in the same manner as above, in an attached state. [Figure 10] This is an oblique view of the sandbag as seen from diagonally behind. [Figure 11] FIG. 10 is a plan view of a sandbag with a spacer attached, with a portion of the sandbag in cross section. [Figure 12] FIG. 10 is a vertical cross-sectional view of the main part of the sandbag. [Figure 13] FIG. 10 is an explanatory perspective view of a sandbag structure showing a second embodiment of the present invention. [Figure 14] FIG. 10 is an explanatory perspective view of the sandbag structure during construction. [Figure 15] FIG. 10 is a plan view of an outer pouch body in which a spacer for a central side portion is arranged, showing a third embodiment of the present invention. [Figure 16] 16A and 16B show a fourth embodiment of the present invention, in which FIG. 16A is a plan view of an outer pouch body in which spacers for corner portions are arranged, and FIG. 16B is a plan view of the spacers for corner portions. [Figure 17] FIG. 10 is a plan view of an outer pouch body in which spacers for the center of the side surfaces and spacers for the corner portions are arranged, showing a fifth embodiment of the present invention. [Figure 18] FIG. 10 is a side view of a sandbag structure showing a sixth embodiment of the present invention. [Figure 19] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0024] Preferred embodiments of the present invention will be described with reference to the accompanying drawings. Note that the embodiments described below do not limit the content of the present invention as defined in the claims. Furthermore, not all of the configurations described below are necessarily essential requirements of the present invention. [Example]

[0025] 1 to 12 show a first embodiment of the present invention. As shown in the figures, sandbags 1 are piled on a slope 102 of a river 101 to construct a revetment 103 as a sandbag structure, and the example shows how the slope 102 collapses and is then restored as an emergency measure. The sandbag structure can also be used for purposes other than the slope 102 of the river 101, such as retaining walls on slopes other than rivers.

[0026] Sandbag 1 comprises an outer bag body 2 and an inner bag body 3 that is placed inside this outer bag body 2. These outer bag body 2 and inner bag body 3 can be made from synthetic fibers such as PP (polypropylene), PE (polyethylene), PET (polyethylene terephthalate) in sheet or net form, or from a flexible sheet made by laminating PVC resin or the like on both sides of a synthetic fiber sheet, and examples of colors include black, beige, white, green, brown, and gray.

[0027] The outer bag body 2 is a rectangular cylindrical body with an open top. Outer pouch body The container has a body 4 and a bottom 5 that closes the bottom of the body 4. The body 4 is made up of four identically shaped containers. pieces The sandbag 1 is constructed by connecting adjacent vertical edges 7, 7 of the side sections 6, 6, 6, 6 with vertical seams 8. The peripheral edge of the bottom section 5 is attached to the lower edges of the side sections 6, 6, 6, 6 with horizontal seams 9, and the lower part of the body section 4 is closed by the bottom section 5, while the upper part of the body section 4 is open. Furthermore, by using a water-permeable body section 4 and / or bottom 5, some of the water in the filled settable filler 41 is dehydrated to the outside, causing the settable filler 41 to harden relatively quickly, and the settable filler 41 makes the sandbag 1 resistant to impact, abrasion, and punctures.

[0028] A partition 11 is provided inside the outer bag body 2, and the vertically elongated partition 11 is arranged inside each of the four corners 12, 12, 12, 12 of the body portion 4, from the upper end to the vicinity of the lower end of the corner 12, so as to straddle the inner surfaces of adjacent side portions 6, 6 across the corner 12, and each of its end edge portions 11F, 11F is attached to the inner surfaces of the side portions 6, 6 by stitching portions 13.

[0029] The inner side of the corner 12 at the position where the partition wall 11 is attached is the corner side of a substantially right-angled triangle in plan view formed by the both side surfaces 6, 6 sandwiching the corner 12 and the partition wall 11. filling It is formed into a shape partitioned by a space 14. By providing the partition 11 in this manner, even if outward pressure is applied from the inner bag body 3 to the side center portion 6S and the partition 11, the side corner portions 6K, 6K on both sides of the corner 12 do not expand outward, and the corner 12 is maintained at a substantially right angle.

[0030] Furthermore, the space between adjacent sewn portions 13, 13 on one side surface portion 6 is a side surface center portion 6S, and the width of this side surface center portion 6S is W1. Furthermore, the space between the sewn portion 13 and the corner portion 12 on one side surface portion 6 is a side surface corner portion 6K, and the width of this side surface corner portion 6K is W.

[0031] Furthermore, a gap 15 is formed between the lower edge 11S of the partition 11 and the bottom 5, allowing the solidifiable filler 41 to flow into the surrounding gaps through this gap 15. The upper edge of the partition 11 is located at the upper edge of the body 21 of the inner bag body 3, but the upper edge of the partition 11 may be located below the upper edge of the body 21 of the inner bag body 3, as shown in Figure 4.

[0032] The area surrounded by the four side center portions 6S and the four partition walls 11 is a storage section 16 that stores the inner pouch 3, and as shown in Fig. 2, the storage section 16 has a substantially octagonal shape. The perimeter L of the storage section 16 is four times the width W1 plus four times the width of the partition walls 11.

[0033] As shown in FIGS. 5 to 7, the inner bag body 3 is a cylindrical bag with an open top. Inner bag body It has a body 21 and a bottom 22 that closes the lower part of the body 21, and the peripheral edge of the bottom 22 is attached to the lower edge of the body 21 by horizontal stitching 23. The body 21 may have a shape other than a cylindrical shape, such as an elliptical cylindrical shape, without corners 12.

[0034] A cylindrical insertion port 24 is sewn and attached to the inner peripheral edge of the upper opening of the body 21. Furthermore, a rope material 25 is provided on the outer surface of the insertion port 24 to tie and close the insertion port 24. The base end 25K of the rope material 25 is attached to the insertion port 24 by sewing or the like, and the two tip ends of the rope material 25 are free ends.

[0035] String-like suspension belts 26, 27 are attached by sewing or the like around the torso portion 21. Specifically, the belt-like suspension belts 26, 27 have belt bottom portions 26T, 27T arranged crosswise on the underside of the bottom portion 22, belt side portions 26S, 26S, 27S, 27S extending vertically upward from both sides of the belt bottom portions 26T, 27T along the outer surface of the torso portion 21, and suspension portions 28, 28 connecting the upper ends of adjacent belt side portions 26S, 26S, 27S, 27S above the torso portion 21. The belt side portions 26S, 26S, 27S, 27S are attached at positions spaced approximately 90 degrees apart in the circumferential direction on the upper side of the torso portion 21.

[0036] The outer bag body 2 is provided with a partition hanging tape 31 as a connecting means at the upper part of the inner surface at the center in the width direction of the partition 11. This partition hanging tape 31 is made by folding a single rope material and attaching the folded part to the partition 11 by a sewing part 31H, with both ends 31T, 31T of the rope material facing upward. Then, by tying the hanging belts 26, 27 with the partition hanging tape 31, the center in the width direction of the partition 11 is connected to the hanging belts 26, 27.

[0037] The base ends of the horizontal waist binding tapes 32 are connected to both widthwise sides of one of the four side surface portions 6. In this example, the base ends of the waist binding tapes 32 are connected by the vertical seams 8, so that the tips 32S of the waist binding tapes 32 on both sides can be directed toward the center of the one side surface portion 6. Note that because only the base ends of the waist binding tapes 32 are attached to the waist portion 4, they hang down before tying, but in Figure 3 and other figures they are shown sideways for the sake of explanation.

[0038] In addition, two waist tying tapes 32 are provided on both sides of the width of the side portion 6, one on top and one on bottom, and the upper waist tying tape 32 is provided between the height center of the waist portion 4 and the upper edge, closer to the height center, and the lower waist tying tape 32 is provided between the height center of the waist portion 4 and the bottom portion 5, closer to the height center.

[0039] In addition, the end of the head binding tape 33 is attached to the upper outer surface at the center in the width direction of each side surface portion 6 by a stitched portion 33H.

[0040] Loop portions 34W are formed above the corners 12 of the body 4 of the outer pouch 2 by attaching both ends of the main body guard tape 34 by the vertical seams 8. The loop portions 34W provided at the top of the four corners of the body 4 can be hung on a support member (not shown) such as a hook whose height is fixed, thereby keeping the top opening of the body 4 open, and in this state the inner pouch 3 can be inserted into the outer pouch 2. Note that the tapes 31, 32, 33, and 34 are made of string-like materials.

[0041] In addition, the corner portion side of the corner portion 12 of the body portion 4 filling The space 14 can be filled with a hardening filler 41 such as mortar, concrete, lightweight mortar, foam mortar, cement improver, etc. The hardening filler 41 is a filler that hardens over time after being filled.

[0042] Granular material 42 such as earth and sand is filled inside the inner bag 3, and local soil can be used for the earth and sand. Furthermore, it is preferable that the solidifying filler 41 has a larger specific gravity than the granular material 42 that serves as the filler for the inner bag after solidification. If the specific gravity of the solidified filler portion 51 is larger than that of the granular material 42, the weight of the sandbag 1 can be made heavier than if the entire sandbag 1 were filled with granular material 42.

[0043] As an example, in the outer pouch 2, if the width W1 of the side center portion 6S is 350 mm, the width of the partition 11 is 565 mm, and the width of the side corner portion 6K is 400 mm, the circumferential length L is 3660 mm, and the diameter of the body portion 21 of the inner pouch 3 housed in the outer pouch 2 is 1100 mm and the circumferential length of the body portion 21 is approximately 3456 mm, which is shorter than the circumferential length L. Furthermore, the distance between the opposing partitions 11, 11 is smaller than the diameter of the body portion 21, and the diameter of the body portion 21 is smaller than the distance between the opposing side portions 6, 6. In this example, the circumferential length L is approximately 1.06 (3660 / 3456) times the circumferential length of the body portion 21.

[0044] As another example, in the outer pouch 2, when the width W1 of the side central portion 6S is 550 mm, the width of the partition 11 is 565 mm, and the width of the side corner portion 6K is 400 mm, the circumferential length L of the storage section 16 is 4460 mm, the diameter of the body portion 21 of the inner pouch 3 to be placed in the outer pouch 2 is 1300 mm, and the circumferential length of the body portion 21 is approximately 4084 mm, which is shorter than the circumferential length L. In this example, the circumferential length L is approximately 1.09 (4460 / 4084) times the circumferential length of the body portion 21.

[0045] By making the circumferential length of the body 21 of the inner bag 3 shorter than the circumferential length L of the storage section 16 of the outer bag 2 as described above, when the inner bag 3 filled with the granular material 42 is placed in the storage section 16 of the outer bag 2, a central filling space 17 (see FIG. 2) is formed between the inner bag 3 and the central side portion 6S. and Figure 17 ) can be provided. filling When the space 14 is filled with the settable filler 41, the settable filler 41 passes through the lower gap 15 and is filled into the central filling space 17. Note that Figures 8 and 10 illustrate the case where the circumferential length L and the circumferential length of the body portion 21 are approximately equal.

[0046] Next, an example of a method for constructing a revetment 103 using sandbags 1 each having the outer bag body 2 and the inner bag body 3 will be described.

[0047] Before stacking the sandbags 1, the inner bag body 3 is filled with granular material 42, and the inlet 24 is closed by tightening it with a rope (not shown) or the like. After this, the inner bag body 3 is lifted using the two hanging parts 28, 28, and placed inside the empty outer bag body 2. Then, as the inner bag fixing process, the partition wall hanging tape 31 provided on the partition wall 11 is tied to the hanging parts 28 to fix the outer bag body 2 to the inner bag body 3, and further, the tip sides of the opposing head binding tapes 33, 33 are tied at the top of the inner bag body 3 to connect them.

[0048] When the inner bag 3 is filled with granular material 42, the weight of the granular material 42 causes the body 21 of the inner bag 3 to deform, expanding from top to bottom (FIG. 12), forming a bulging portion 21B with a maximum diameter near the bottom 22. At this time, since a gap 15 is formed between the lower edge 11S of the partition 11 and the bottom 5, the bulging portion 21B easily expands without being restricted by the partition 11. Note that, for ease of understanding, a gap is shown between the partition 11 and the body 21 in FIG. 12, but in reality, the partition 11 and the body 21 are in contact. Furthermore, as the body 21 contacts the partition 11, the distance between the partitions 11, 11 located diagonally opposite each other also increases from top to bottom.

[0049] Furthermore, when backfilling the back side of the sandbag 1 with a revetment construction 103 or the like, the tips of the body binding tapes 32, 32 on both sides are connected with a knot 32M, as shown in Figure 10, so that the side corner portions 6K, 6K, 6K, 6K of the left and right corner portions 12, 12 on the back side can be folded so as to align with the back side of the body portion 21 of the inner bag body 3.

[0050] Furthermore, spacers 43 can be used to prevent deformation of corners 12 during filling operations such as filling with filler 41. For example, as shown in Fig. 11, corner spacers 43 are placed between corners 12 and the outer surface of inner pouch 3. These spacers 43 are made of synthetic fibers such as PP (polypropylene), PE (polyethylene), and PET (polyethylene terephthalate), or natural materials such as paper, and are in the form of a net, plate, or sheet, and have shape retention.

[0051] In this example, the spacer 43 is a flat plate made of a hollow rectangular plate or the like that is long in the vertical direction, with one vertical edge 43T of the spacer 43 abutting against the inner surface of the corner 12 and the other vertical edge 43T of the spacer 43 abutting against the widthwise center of the outer surface of the partition 11, and the spacer 43 is disposed diagonally across the body 21. The lower edge of the spacer 43 rests on the bottom 5, and the upper edge 43U of the spacer 43 can be positioned below the upper edge of the body 4, and in this example, the upper edge 43U is located toward the heightwise center of the body 4.

[0052] In this way, one vertical edge 43T of the spacer 43 is an abutment portion that abuts against the inner surface of the corner 12, and the other vertical edge 43T of the spacer 43 is an abutment portion that abuts against the widthwise center of the outer surface of the partition wall 11, and these abutment portions maintain the gap between the corner 12 and the widthwise center of the outer surface of the partition wall 11. In this way, the spacer 43 is a gap maintaining material that maintains the gap.

[0053] Therefore, the corner side filling When the space 14 is filled with the filler 41 and the upper surface of the filler 41 is above the upper edge 43U of the spacer 43, the corner side filling The height of the filler 41 on both sides of the spacer 43 in the space 14 is the same. The spacer 43 is embedded in the filler 41.

[0054] When installing the sandbags 1, they are lined up side by side so that the corners 12, 12 are located on the left and right sides of the front side of the revetment work 103, and the backfill material 104 is poured into the gap between the back side of the sandbags 1 and the slope 102 to backfill, while the sandbags 1 are stacked one on top of the other. Furthermore, to match the gradient of the slope 102, the upper sandbag 1 is stacked behind the lower sandbag 1, and in Figure 1, the upper sandbag 1 is shifted by approximately half the front-to-back width of the sandbag 1. By constructing the revetment work 103 in this way, the slope 102 can be stabilized and protected even before the hardening filler 41 is filled in, and it can function as a temporary structure in case of emergency restoration.

[0055] After this, to fill the solidifying filler 41 into the left and right corners 12, 12 on the front side, a foothold is secured, and the filling is carried out from the lower level up to the upper level, and a pump truck, hopper, chute, etc. are used for this filling.

[0056] If sandbags 1 are piled up and backfilled, and the hardening filler 41 is a cement-based filler such as mortar, the curing period will be about 1 to 2 days, and the temporary revetment work 103 can be constructed in a short period of time.

[0057] Furthermore, as a modified example of the construction of the revetment work 103, after the inner bag fixing process, before stacking sandbags 1 in front of the slope 102 where the work is to be installed, solidifying filler 41 can be filled into the left and right corners 12, 12 on the front side of the revetment work 103, and after the solidifying filler 41 has been cured, the sandbags 1 can be stacked.

[0058] In this case, since the filling and curing of the hardening filler 41 is carried out on the ground 105 before piling up, it takes time to complete piling up the sandbags 1, but since the filling work of the filler 41 can be carried out on the ground 105, the work is facilitated and adjacent sandbags 1, 1 on the left and right can be piled up without gaps. That is, the sandbags 1, 1 are lined up on the ground 105 in advance, and the corners 12, 12 of adjacent sandbags 1, 1 are piled up with no gaps. filling By filling the spaces 14, 14 with the hardening filler 41, it is possible to almost eliminate gaps between the adjacent corners 12, 12, and by arranging the sandbags 1, 1 side by side in the same way as arranging them on the ground 105, the adjacent sandbags 1, 1 can be piled up without any gaps.

[0059] In this way, if the left and right sandbags 1, 1 are temporarily placed on the ground 105 so that there are no gaps between the solidified filler parts 51, 51 of the adjacent corners 12, 12, and then the left and right sandbags 1, 1 are lined up side by side on the slope 102 where they are installed, just like on the ground 105, the adjacent sandbags 1, 1 on the left and right can be lined up without any gaps.

[0060] Furthermore, the corner sides of all four corners 12, 12, 12, 12 fillingThe space 14 may be filled with the solidifying filler 41. In this case, after piling up the piles on the front side of the slope 102, the filler 41 may be filled in the left and right corners 12, 12 on the rear side. filling It is preferable to fill the space 14 with the hardening filler 41. In this way, any one of the four side portions 6, 6, 6, 6 may be disposed on the front side of the revetment work 103, which makes construction easier.

[0061] As shown in FIG. 12, the body 21 of the inner bag body 3 is deformed into a shape that expands from top to bottom, and the partition walls 11, 11 on the diagonal line are deformed into a shape that widens the gap from top to bottom. filling By filling the space 14 with a solidifying filler 41 and forming a filler solidification section 51, the inner bag body 3 is prevented from slipping out of the outer bag body 2, and the bulging section 21B supports part of the load of the outer bag body 2, so that when lifted, the entire weight of the inner bag body 3 is not applied to the partition hanging tape 31.

[0062] Even when the inner bag body 3 filled with granular material 42 is placed in the outer bag body 2 provided with the partition wall 11, the side surfaces 6, 6 on both sides of the corner part 12 do not spread outward due to the partition wall 11, and the corner part 12 is held at a substantially right angle.

[0063] Furthermore, when the circumferential length L1 of the body 21 of the inner bag body 3 is less than the circumferential length L of the storage section 16 of the outer bag body 2, when the body 21 of the inner bag body 3 is in contact with the inner surface of the partition 11, the body 21 can reduce the force applied to the partition 11 from the granular material 42, and therefore the corner 12 can be maintained at approximately a right angle more than when only the outer bag body 2 with the partition 11 is used without using the inner bag body 3.

[0064] In addition, the sandbag 1 has a filler solidification section 51 formed by filling the area around the inner bag body 3 with a solidifying filler 41, so that when the solidifying filler 41 hardens, the unity between the outer bag body 2 and the inner bag body 3 filled with granular material 42 becomes stronger.

[0065] In addition, in the revetment work 103 constructed in this manner, the outer bag body 2 with the partition walls 11 has a square shape on the left and right sides of the front with few gaps due to the solidified filler part 51, and the provision of the solidified filler part 51 makes it resistant to external damage factors such as collisions with boulders, driftwood, etc., and it is also resistant to suction by running water. Furthermore, since it is heavier and more solid than ordinary large weather-resistant sandbags, it is an excellent durable structure.

[0066] If the revetment work 103 is temporary, it is removed by lifting it up using the lifting part 28 of the sandbag 1 with a crane or backhoe, etc. However, if a long period of time has passed, the lifting part 28 may deteriorate and its strength may decrease. Therefore, if the revetment work is to be installed for a long period of time, a dedicated inner bag body 3 should be used or the corner side filling It is also possible to install anchors 52 using reinforcing bars or the like on the upper surface of solidified filler portion 51 where filler 41 filled in space 14 has solidified, and use anchors 52 to lift up the space.

[0067] As shown in Figure 9, the anchor 52 has a main body 53 made of reinforcing bar or the like formed into an inverted U shape, and embedded portions 54, 54 with both ends of the main body 53 bent outward, and these embedded portions 54, 54 are embedded and fixed in the filling material solidification portion 51.

[0068] Regarding disposal after removal, since the filler solidification portion 51 can be easily separated from the outer bag body 2 and the inner bag body 3, the filler solidification portion 51 and the granular material 42 can be reused, while the outer bag body 2 and the inner bag body 3 can be disposed of as industrial waste.

[0069] In this way, the granular material 42 is not placed directly in the outer bag 2, but is placed in the inner bag 3 and used, and the corner side filling This novel construction allows the space 14 to be directly filled with a hardening filler 41 such as mortar, and the entire sandbag 1 can be suspended using suspension belts 26, 27 even after filling.

[0070] In this embodiment, the following applies to claim 1: The top is open and has four side sections 6, 6, 6, 6. Square cylindrical Outer bag Torso 4 and a bottom portion 5 that closes the lower portion of the body portion 4. An outer bag body 2 and a bag placed inside the outer bag body 2, The inner bag body portion 21The inner bag 3 containing the granular material 42 and the solidifying filler 41 are filled in. Corner side Filling space 14 and central filling space 17 and The outer pouch body 2 is provided with partitions 11 on the inside of the four corners of the body 4, straddling the side surface portions 6, 6 on both sides of the corners 12, and both widthwise edge portions of the partitions 11 are attached to the inner surfaces of the side surface portions 6, 6 on both sides of the corners 12 by stitching portions 13, 13. In one side surface portion 6, the space between adjacent stitching portions 13, 13 is a side surface central portion 6S, and in one side surface portion 6, the space between the stitching portion 13 and the corner 12 is a side surface corner portion 6K. The inner portions of the corners 12 are A corner-side filling space 14 is partitioned by the side corners 6K, 6K on both sides of the corner 12 and the partition wall 11, and the area surrounded by the four side center portions 6S, 6S, 6S, 6S of the outer bag body 2 and the four partition walls 11, 11, 11, 11 is a storage section 16 for storing the inner bag body 3, and a center-side filling space 17 is provided between the body portion 21 of the inner bag body 3 stored in the storage section 16 and the side center portion 6S, and a gap 15 is formed between the lower edge 11S of the partition wall 11 and the bottom 5. From the corner side of the corner 12 of the outer bag body 2 filling space 14 and central filling space 17 By filling the sandbags 1 with a hardening filler 41, the gaps between the adjacent sandbags 1, 1 can be reduced, and the hardened filler 41 improves the strength of the sandbags. In this case, when the corner filling space 14 is filled with the settable filler 41, the settable filler 41 passes through the gap 15 at the bottom and is filled into the center filling space 17.

[0071] In this embodiment, corresponding to claim 2, Corner side The solidifying filler 41 filled in the filling space 14 has solidified. Corner side Filler solidification section 51 and a central filler solidified portion 51A formed by solidifying the solidifiable filler 41 filled in the central filling space 17, and the central filler solidified portion 51A and the left and right corner side filler solidified portions 51, 51 of the central filler solidified portion 51A are continuous. Therefore, the strength of the sandbag 1 is improved by the solidified filler portion 51.

[0072] Also, In this way, in this embodiment, claims 1 In response to , interval The corner side is a filled space surrounded by the wall 11 and the side surfaces 6, 6 on both sides of the corner 12. filling Since the space 14 is provided, even if outward pressure is applied from the inner bag body 3 to the side surface part 6 of the outer bag body 2 and the partition wall 11, the partition wall 11 prevents the side surface parts 6, 6 on both sides of the corner part 12 from expanding outward, and the corner part 12 is maintained at a substantially right angle.

[0073] In this way, in this embodiment, claims 3 In response to Corner side The filling space 14 includes: A flat rectangular plate with a long vertical length. Spacer 43 is provided. One vertical edge 43T of the spacer 43 is in contact with the inner surface of the corner 12, and the other vertical edge 43T of the spacer 43 is in contact with the center of the width direction of the outer surface of the partition wall 11. Therefore, the corner 12 is securely held, and the corner side filling A space 14 can be secured.

[0074] In this way, in this embodiment, claims 4 Corresponding to the above, claims 1 to 3 In the method for manufacturing the sandbag 1 according to any one of the above, after the granular material 42 is put into the inner bag body 3, the inner bag body 3 is placed into the outer bag body 2, and the corner side which is the filling space is filled. filling space 14 and central filling space 17Therefore, when the granular material 42 is directly placed in the outer bag body 2, the corners of the outer bag body 2 are filled with the solidifying filler 41. filling Even if the space 14 is partitioned, when the granular material 42 is put in from the upper opening, the corner side filling The granular material 42 is easily introduced into the space 14. However, the granular material 42 is not directly introduced into the outer bag body 2, but the inner bag body 3 containing the granular material 42 is introduced into the outer bag body 2. Therefore, the corner side filling A space 14 can be secured.

[0075] In this way, in this embodiment, claims 5 In response to this, the sandbag 1 according to claim 2 is used and multiple sandbags 1 are lined up, so that by using the sandbags 1 with excellent strength, a revetment work 103 that is a sandbag structure with excellent strength can be obtained.

[0076] In this way, in this embodiment, claims 6 In accordance with the above, in the construction method of the sandbag structure according to claim 6, after arranging the plurality of sandbags 1, the corner side which is the filling space is filling space 14 and central filling space 17 Since the hardening filler 41 is filled in the sandbag structure, the bank protection work 103, which is a sandbag structure, can be constructed in a short construction period.

[0077] As an effect of the embodiment, by using a body 4 and / or bottom 5 that is water-permeable, some of the moisture in the filled solidifiable filler 41 is dehydrated to the outside, so that the solidifiable filler 41 solidifies relatively quickly, and the filler solidification portion 51 becomes resistant to impact, abrasion, and punctures.

[0078] In addition, since the outer bag body 2 has a partition hanging tape 31 as a connecting means for connecting the outer bag body 2 to the inner bag body 3, by tying the hanging belts 26, 27 with the partition hanging tape 31, the center of the width of the partition 11 is connected to the hanging belts 26, 27, so there is no need to provide a hanging belt on the outer bag body 2.

[0079] By making the circumferential length L1 of the body 21 of the inner bag 3 shorter than the circumferential length L of the storage section 16 of the outer bag 2, a central filling space 17 (Fig. 2) can be provided between the inner bag 3 and the side central section 6S when the inner bag 3 filled with granular material 42 is placed in the storage section 16 of the outer bag 2. As described above, the circumferential length L was approximately 1.06 or approximately 1.09 times the circumferential length of the body 21 in the experiments, but by making the circumferential length L of the storage section 16 1.05 to 1.1 times the circumferential length of the body 21, the central filling space 17 (Fig. 2) can be provided.

[0080] And the corner side filling When the space 14 is filled with the solidifiable filler 41, the solidifiable filler 41 passes through the gap 15 at the bottom and is filled into the central filling space 17. center Filler solidification section 51A This solidified filler is formed. 51A is on the left and right Corner side The solidified filler portions 51, 51 are integrally continuous. filling When the spaces 14, 14 are filled with the solidifying filler 41, a continuous central filler solidifying portion is formed on the inner surface of the side surface portion 6 between the adjacent corner portions 12, 12. 51A This improves the strength of the side surface portion 6.

[0081] Also, the corner side filling Since the space 14 is filled with the solidifying filler 41, no gaps are formed between the outer bag body 2 and the inner bag body 3. Furthermore, the four corners filling The corners are provided with spaces 14, but are filled with solidifying filler 41 depending on the conditions of use in the soil structure. filling The number of spaces 14 can be selected.

[0082] In addition, the corners that are filled with space filling After filling the space 14 with the hardening filler 41, the plurality of sandbags 1 are lined up in the left-right direction and piled up. Therefore, the adjacent corners 12, 12 of the left and right sandbags 1, 1 are stacked on the ground 105 in advance. Corner sideIf the filling material solidification parts 51, 51 are temporarily assembled so that there are no gaps, and the left and right sandbags 1, 1 are lined up side by side on the slope 102 where they are to be installed, the sandbags 1, 1 adjacent to each other on the left and right in the revetment work 103 which is a sandbag structure can be lined up without any gaps.

[0083] When the inner bag body 3 is placed inside the partition wall 11 in the outer bag body 2, the lower part of the inner bag body 3 expands due to the weight of the granular material 42, and the granular material 42 flows from the gap 15 to the corner side. filling A bulging portion 21B is formed that bulges into the space 14, and the body 21 of the inner bag body 3, which expands from top to bottom, is prevented from slipping out by the solidified filler portions 51, 51, and supports part of the load of the outer bag body 2, thereby reducing the load applied to the partition hanging tape 31.

[0084] When backfilling the back side of the sandbag 1, as shown in Figure 10, the tips of the body binding tapes 32, 32 on both sides are connected with a knot 32M, which allows the corners 12, 12 on both sides that form the back side to be folded so that they fit along the back side of the body 21 of the inner bag body 3, so that the side portion 6 on the back side does not get in the way of backfilling.

[0085] In addition, one vertical edge 43T of the spacer 43 is in contact with the inner surface of the corner 12, and the other vertical edge 43T of the spacer 43 is in contact with the widthwise center of the outer surface of the partition 11, and the spacer 43 is disposed on the diagonal of the body 21, so that the shape of the corner 12 can be reliably maintained. filling It is also possible to install anchors 52 using rebar or the like on the upper surface of solidified filler portion 51 where filler 41 filled in space 14 has solidified, and then use anchor 52 as a lifting means to lift sandbag 1. Anchor 52 is a lifting device connecting means that can be engaged and detached with a hook (not shown) of a lifting device such as a lifting rope, and by connecting the hook to anchor 52 and connecting the lifting rope to heavy machinery, sandbag 1 can be lifted by the heavy machinery. [Example]

[0086] 13 and 14 show a second embodiment of the present invention, in which the same parts as those in the first embodiment are given the same reference numerals and their explanations will be omitted. The figures show an example in which, in a stack of sandbags 1 for a revetment construction 103 or the like, filler solidification sections 51 are provided at least at the front left and right corners 12, 12, and the filling locations of the solidifiable filler 41 are set depending on the position of the sandbags 1.

[0087] The hardenable filler 41 can be applied after the sandbags 1 have been piled up, or can be placed on the ground 105 before they are piled up. As in the first embodiment, the hardenable filler 41 can be filled after all the layers of sandbags 1 have been piled up, or it can be filled for each layer, or it can be filled for multiple layers, or the hardenable filler 41 can be filled into multiple sandbags 1 while lining them up side by side and stacking them up.

[0088] In the lower tier, multiple sandbags 1 (four bags) are lined up on the left and right, and in the second tier above this lower tier, three sandbags 1 are lined up on the left and right, one less than in the lower tier, and in the upper tier, two sandbags 1,1 are lined up on the left and right, one less than in the lower tier.In addition, the sandbags 1 are lined up on the left and right tiers, and specifically, the sandbags 1 on the upper tier are lined up with a left-right offset, and more specifically, the sandbags 1 on the upper tier are lined up with a left-right offset by half the left-right dimension of the sandbags 1 on the lower tier.

[0089] In all stages, the corners 12, 12 of the front left and right corners of the sandbag 1 filling The space 14 is filled with solidifiable filler 41 to provide filler solidification sections 51, 51. The filler solidification section 51 is provided in the rear left corner 12 of the sandbag 1 at the left end of the lower tier. In addition, the filler solidification section 51 is provided in the rear right corner 12 of the sandbag 1 at the right end of the lower tier. For ease of understanding, the filler solidification sections 51, 51 are hatched.

[0090] Similarly to the first tier, the sandbag 1 in the second tier, which is the middle tier, has a filler solidification section 51 provided at the rear left corner 12 of the leftmost sandbag 1 in the lower tier. Also, a filler solidification section 51 is provided at the rear right corner 12 of the rightmost sandbag 1 in the lower tier.

[0091] The top sandbag 1 that is not overlapped with the upper sandbag 1 has all corners 12 fillingThe space 14 may be filled with the solidifying filler 41 to provide solidified filler portions 51 at the four corners.

[0092] The corners 12 where the filler solidification portions 51 are not provided are crushed by the backfill material 104 between them and the slope 102. Alternatively, the corners 12 may be made to conform to the body portion 21 of the inner bag body 3 by the binding tape 32.

[0093] Adjacent corners filling When the spaces 14, 14 are filled with the solidifiable filler 41, a continuous central solidified filler portion is formed on the inner surface of the side surface portion 6 between the adjacent corner portions 12, 12.

[0094] In this way, the present embodiment provides the same functions and effects as the first embodiment.

[0095] In addition, as in this example, when stacking the upper sandbags 1 on top of the lower sandbags 1 on the front side of the slope 102 by shifting them backward, the corner side hidden under the upper sandbags 1 filling The space 14 can be constructed without filling with the filler 41. In addition, the corner side where the filler 41 is not filled filling The side corners 6K, 6K that form the space 14 may be crushed by the backfill material 104 without using the body binding tape 32. [Example]

[0096] 15 shows a third embodiment of the present invention, in which the same parts as those in the above-mentioned embodiments are given the same reference numerals and their explanations are omitted. This embodiment shows a modified example of the spacer.

[0097] As shown in the figure, the spacer 44 for the side center portion 6S is a flat plate such as a hollow structural plate that is placed on the inner surface of the side center portion 6S in correspondence with the side center portion 6S, and the vertical edges 44T, 44T are located at the positions of adjacent sewn portions 13, 13. The lower edge of the spacer 44 is placed on the bottom portion 5, and the upper edge 44U of the spacer 43 can be located below the upper edge position of the body portion 4; in this example, the upper edge 53U is located at the upper edge of the body portion 4.

[0098] In this way, this embodiment provides the same functions and effects as the above-described embodiments.

[0099] In addition, in this embodiment, by attaching a spacer 44 such as a hollow structural plate to the inner surface of the central side portion 6S, the central side portion 6S is prevented from bending inward, and a central filling space 17 is created between the spacer 44 and the body portion 21 of the inner bag body 3 because the circumferential length L of the storage section 16 is longer than the circumferential length of the body portion 21 of the inner bag body 3. [Example]

[0100] 16 shows a fourth embodiment of the present invention, in which the same parts as those in the above-mentioned embodiments are given the same reference numerals and their explanations are omitted. This embodiment shows a modified example of the spacer.

[0101] As shown in the figure, the spacer 45 on the corner 12 side has a corner 46 and flat side plate portions 47, 47 corresponding to the corner 12 and the central portions 6S, 6S of the side surfaces on both sides of the corner 12, the lower edge of the spacer 45 rests on the bottom portion 5, and the upper edge 45U of the spacer 45 can be set lower than the upper edge position of the body portion 4, and in this example, the upper edge 45U is located at the upper edge of the body portion 4. In other words, the height of the spacer 45 is equal to the height of the body portion 4.

[0102] In this way, one vertical edge 43T of the spacer 45 is an abutment portion that abuts against the inner surface of the corner 12, and the other vertical edge 43T of the spacer 43 is an abutment portion that abuts against the widthwise center of the outer surface of the partition wall 11, and these abutment portions maintain the gap between the corner 12 and the widthwise center of the outer surface of the partition wall 11. In this way, the spacer 43 is a gap maintaining material that maintains the gap.

[0103] As an example, the spacer 45 can be formed from a hollow structure plate or the like, and the corner portion 46 can be formed by bending a flat hollow structure plate or the like, and the side plate portions 47, 47 can be formed on both sides of the corner portion 46, and the spacer 45 can be attached to the corner side. filling From the upper opening of the space 14 to the corner side fillingThe side panels 47 are inserted into the space 14, and the corners 46 are aligned with the corners 12. The side panels 47 are aligned along the inner surfaces of the side corners 6K. The vertical edges 45T at the widthwise ends of the side panels 47 are positioned at the vertical seams 8, which are the connecting points between the partition wall 11 and the side panels 6. filling A spacer 45 may be disposed within the space 14 .

[0104] In this manner, the spacer 45 is an abutment portion that abuts against the inner surface of the corner portion 12, and the vertical edge 45T of the spacer 45 is an abutment portion that abuts against the connecting portion between the partition wall 11 and the side surface portion 6.

[0105] In this way, this embodiment provides the same functions and effects as the above-described embodiments.

[0106] In addition, in this embodiment, the spacer 45 has a corner 46 and flat side plate portions 47, 47 corresponding to the corner 12 and the side central portions 6S, 6S on both sides of this corner 12, so that the shape of the side corner portions 6K, 6K on both sides of the corner 12 can be maintained, and gaps can be prevented from occurring between the left and right side portions 6, 6 of adjacent sandbags 1, 1.

[0107] Although not shown, if the spacer 44 is disposed between the left and right spacers 45, 45, the thickness of the central filling space 17 can be ensured. [Example]

[0108] 17 shows a fifth embodiment of the present invention, in which the same parts as those in the above-mentioned embodiments are given the same reference numerals and their explanations are omitted. This embodiment shows a modified example of the spacer.

[0109] As shown in the figure, this is an example in which the spacers 43, 44, and 43 are combined. Although not shown, spacers 45, 44, and 45 may also be used in combination.

[0110] In this way, this embodiment provides the same functions and effects as the above-described embodiments.

[0111] In addition, in this embodiment, since the central portion 6S of the side surface is maintained in shape by the spacer 44, a central filling material solidified portion 51A of a predetermined thickness can be formed between the central portion 6S of the side surface and the body portion 21 of the inner bag body 3.

[0112] Also ,left Right corner side filling Inside space 14,14 of Since the solidified filling portions 51, 51 and the central solidified filling portion 51A are provided continuously on the front surface of the sandbag 1, the sandbag has great strength against loads from the front. [Example]

[0113] 18 and 19 show a sixth embodiment of the present invention, in which the same parts as those in the above-described embodiments are assigned the same reference numerals and will be described in detail without repeating the description. As shown in the figures, a sandbag protective structure 61 (hereinafter referred to as the protective structure 61) as a sandbag structure includes a stack 62 in which a plurality of sandbags 1, 1A are lined up in the left-right and front-rear directions and stacked, rope material 63 as binding material for binding the plurality of sandbags 1, 1A of this stack 62 together in each layer, and a net 64 covering the outer surface of the stack 62.

[0114] The sandbag 1A is larger in left-right and front-to-back dimensions than the sandbag 1. Specifically, the width W1 of the sewn portions 13, 13 of the sandbag 1A is 550 mm, and the front-to-back width and left-to-right width of the body 4 are larger than those of the sandbag 1.

[0115] As shown in Figures 1, 2, and 5, in this example, sandbags are stacked in three tiers, with the first tier (bottom tier) having six sandbags 1A lined up on the left and right and two sandbags 1A lined up in the front and back to form a first sandbag layer 71. The front side faces the mountain. The second tier (middle tier) above the first sandbag layer 71 has six sandbags 1 lined up on the left and right and two sandbags 1 lined up in the front and back to form a second sandbag layer 72. The third tier (top tier) above this second sandbag layer 72 has five sandbags 1 lined up on the left and right and two sandbags 1 lined up in the front and back to form a third sandbag layer 73.

[0116] In the longitudinal direction (left-right direction) of the protective structure 61, the third sandbag layer 73 has one less sandbag 1 than the second sandbag layer 72. Furthermore, because the sandbags 1, 1A are different in size, the second sandbag layer 72 is formed shorter in the left-right direction than the first sandbag layer 71, forming a step on the left and right of the sandbag layers 71, 72, and the second sandbag layer 72 is formed shorter in the front-to-back direction than the first sandbag layer 71, forming a step on the front and back of the sandbag layers 71, 72.

[0117] In addition, sandbags 1 and 1A have all corners filling It is preferable to fill the space 14 with solidifying filler 41, which increases the strength of the sandbags 1, 1A as they are surrounded on all sides by solidified filler parts 51 and central solidified filler part 51A, and further allows adjacent sandbags 1, 1 to be lined up without gaps between them.

[0118] The sandbags 1, 1A of each tier are bound together by the rope material 63 which serves as a binding material for each tier. The rope material 63 is made of synthetic resin and has flexibility.

[0119] In this way, this embodiment provides the same functions and effects as the above-described embodiments.

[0120] Furthermore, sandbags 1, 1A surrounded on all sides by solidified filler portions 51 and a central solidified filler portion 51A are used, and adjacent sandbags 1, 1, 1, 1A are also arranged without gaps in the front and rear, so that a sandbag protective structure 61 with excellent strength can be obtained.

[0121] Furthermore, the sandbag 1A is formed larger in left-right and front-to-back dimensions than the sandbag 1, and the smaller upper sandbag 1 is stacked on top of the lower sandbag 1A, so the sandbags 1 and 1A can be stacked stably.

[0122] In addition, the corners of the front side of the sandbags 1, 1A at the front of the protective structure 61 that receives impact force such as falling rocks fillingBy filling the space 14 with solidifiable filler 41 to provide a filler solidification section 51, preferably a filler solidification section 51A, and connecting the left and right filler solidification sections 51 with this filler solidification section 51A, a protective structure 61 that is resistant to impact forces can be constructed.

[0123] The present invention is not limited to the present embodiment, and various modifications are possible within the scope of the present invention. For example, in the embodiment, the filling of the hardening filler is performed on the ground before piling up, and after piling up. However, in one sandbag, the filling of the hardening filler is performed on at least one corner side. filling After filling the space with a hardening filler and stacking it, Adjacent to each other At least one remaining corner side filling The space may be filled with a hardening filler. Furthermore, various connecting means, such as connecting metal fittings, other than knotting strings, may be used. Furthermore, the spacers shown in Examples 1 to 4 may be appropriately combined and used in sandbags. Holes may be provided in the spacers to reduce weight. Furthermore, the outer bag body may be a rectangular or square shape in plan view, and the inner bag body may be an oval or other shape in plan view. Although the sandbag protective structure shown in the Examples has sandbags stacked in three layers, sandbags may be stacked in one, two, or four or more layers. Furthermore, the sling connecting means is not limited to the anchors 52 used in the Examples, and various other means, such as eye bolts, may be used. Furthermore, the height of the spacers may be appropriately selected. [Explanation of symbols]

[0124] 1 sandbag 2 outer bag 3 Inner bag 4. Torso (Outer bag body) 6 Side part 6S side center part 6K Side corner 11 Bulkhead 12 Corner 13 Sewing section 14 Corner side filling Space (filling space) 15 Gap 17 Center side filling space (filling space) 21 Torso (Inner bag body) 41 Solidifying filler 42 Particulate matter 43 Spacer 43T vertical edge 51 Corner side Filler solidification section 51A Central filler solidification section 61 Sandbag protective structure (sandbag structure) 103 Revetment works (sandbag structures)

Claims

1. An outer pouch body having a rectangular cylindrical outer pouch body body with an open top having four side portions and a bottom portion that closes the bottom of the outer pouch body body; an inner bag placed inside the outer bag and having granular material inside a body of the inner bag; a corner-side filling space and a center-side filling space to be filled with a solidifying filler; the outer pouch has partitions provided at the insides of four corners of the body of the outer pouch, each partition spanning the side surfaces on both sides of the corner, and both widthwise end edges of the partitions are attached to the inner surfaces of the side surfaces on both sides of the corner by stitching, In one of the side surface portions, a portion between adjacent sewn portions is a side surface center portion, and in one of the side surface portions, a portion between the sewn portion and the corner portion is a side surface corner portion, an inner portion of the corner portion is a corner-side filling space partitioned by the side corner portions on both sides of the corner portion and the partition wall; a portion surrounded by the four side center portions of the outer pouch and the four partition walls is a storage portion for storing the inner pouch, the central filling space is provided between the inner bag body body and the side central portion of the inner bag body accommodated in the accommodation section, A sandbag characterized in that a gap is formed between the lower edge of the partition and the bottom.

2. A corner-side filler solidified portion in which the solidifiable filler filled in the corner-side filling space has solidified; a central filling material solidification portion in which the solidifiable filler filled in the central filling space is solidified, 2. The sandbag according to claim 1, wherein the central solidified filler portion is continuous with the corner-side solidified filler portions on either side of the central solidified filler portion.

3. A sandbag as described in claim 2, characterized in that a flat spacer with a vertically elongated rectangular shape is provided in the corner side filling space, one vertical edge of this spacer abutting against the inner surface of the corner and the other vertical edge of the spacer abutting against the widthwise center of the outer surface of the partition wall.

4. A method for manufacturing a sandbag as described in any one of claims 1 to 3, characterized in that after the granular material is placed in the inner bag body, the inner bag body is placed inside the outer bag body, and the corner side filling space and the central side filling space are filled with the solidifying filler.

5. A sandbag structure comprising a plurality of sandbags according to claim 2 arranged side by side.

6. 6. A method for constructing a sandbag structure according to claim 5, characterized in that after arranging a plurality of the sandbags, the corner filling spaces and the central filling space are filled with the solidifiable filler.

Images