JP2019082065A - Sandbag protection structure - Google Patents

Abstract

To provide a sandbag protection structure excellent in shock absorption effect.SOLUTION: The present invention comprises a stack body in which a plurality of sandbags 2 are arranged side by side and in the front-rear direction and stacked, a rope material 21 for binding a plurality of sandbags 2 arranged in the left-right direction and the front-rear direction, and a net body 5 covering the outer surface of the stack body. Further, since the net body 5 comprises a central net body 31 continuously provided on the front surface 1A, rear surface 1B, upper surface 1J and lower surface 1K of the stack body, by covering the front surface 1A, rear surface 1B, upper surface 1J, and lower surface 1K with the central net body 31, the sandbags 2 of a plurality of stages can be integrated, and the shock absorbing effect can be improved.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sandbag protection structure using a plurality of sandbags.

  It is known that sandbags are conventionally used to reinforce rivers and landslides, and a plurality of sandbags are stacked.

  In addition, in the protection structure that protects from falling rocks, fallen soil and snow, and avalanches, sandbags and other granular materials are filled in the cloth bag, and shock absorbing bags that absorb kinetic energy of collision objects such as falling rocks are used. A shock absorber bag is stacked and provided in advance (for example, Patent Document 1), or a used PET bottle is stored in a bag for sandbags to form a shock absorber block, and a plurality of the shock absorber blocks are locked There are some which arrange a plurality in multi-tiered state on the roof of a falling stone lining work (e.g., Patent Document 2).

  The above-mentioned prior art absorbs a part of the impact force applied to the structure such as the support fence and the rock fall lining, and it is considered about the protection structure which mainly absorbs the impact force such as the fall of the sandbag. It was not. On the other hand, as in the conventional case, a structure in which a plurality of soils are stacked to reinforce rivers and landslides is suitable for temporary construction but only sandbags are stacked, so even if it is used in a protective structure, it will The part which received the impact force collapses, and there is a surface inferior to an impact absorption effect.

  On the other hand, although it is different from the protective structure, in the construction of the sabo dam, the sabo dam which arranges a plurality of sandbags in the left and right direction with intervals in front and back and piles up and down and places concrete between the sandbags in front and back There is a construction method (for example, Patent Document 3).

  In the above sabo dams, sandbags can be integrated with concrete, but sandbags are used instead of molds, and since concrete is cast, construction becomes large, and it is temporarily used for protective structures such as falling rocks. However, it is not suitable for temporary installation, and there is a problem that it is inferior to shock absorption effect.

  On the other hand, even if a structure in which a plurality of sandbags are stacked for reinforcement is used in a protective structure such as a falling stone, the sandbags in the part subjected to the impact are broken because the sandbags are not integrated. It is expected to be inferior to the absorption capacity, and also repair of the damaged part will be complicated.

  Also, in the conventional stack structure, two or more sandbags of the same shape are used, and the upper sandbag is stacked by one less than the lower sandbag, so the upper sandbag is two minutes longer than the lower sandbag. The position is lowered by one, which makes the front of the stacked structure have a gentle slope.

  For this reason, when the conventional stacked structure is used for a protective structure such as a rock fall, the rock falling from a mountain may fly up along the inclined front surface and may jump over the protective structure.

JP, 2014-70390, A Japanese Patent Laid-Open No. 2002-88720 Japanese Patent Application Laid-Open No. 10-266168

  Then, an object of the present invention is to provide a sandbag protection structure excellent in shock absorption effect using sandbags in view of the above-mentioned problem.

  In order to achieve the above object, the invention according to claim 1 is a binding in which a stacked body in which a plurality of sandbags are arranged in the left and right direction and in the front and back direction and stacked, and a plurality of sandbags arranged in the left and right direction And a net body covering an outer surface of the stacker.

  The invention according to claim 2 is characterized in that the net body comprises a main net body provided continuously on the front surface, rear surface, upper surface and lower surface of the stacker.

  The invention according to claim 3 is characterized in that the net body includes left and right net bodies provided on left and right sides of the stacker, and the left and right net bodies are respectively connected to the main net body. Do.

  The invention according to claim 4 is characterized in that a space filling material narrower than the front and rear width of the sandbag is provided between the front and rear sandbags.

  The invention according to claim 5 is characterized in that the steps of the upper and lower sandbags have a smaller front surface than the rear surface.

  The invention according to claim 6 is characterized in that the spacer is a synthetic resin foam.

  The invention according to claim 7 is characterized in that a load distribution surface is provided on the outside of the net body at the front of the stacker.

  According to the configuration of claim 1, by covering the plurality of soil bags integrated in each step with the binding material with the net body, the shock absorbing effect is excellent.

  According to the configuration of claim 2, by covering the front surface, the rear surface, the upper surface and the lower surface with the main net body, the sandbags of a plurality of stages can be integrated, and the shock absorbing effect can be further improved.

  According to the third aspect of the present invention, since the entire surface of the stack body is covered and integrated by the net body, impact force such as falling rock can be absorbed by a wide range of sandbags.

  According to the structure of Claim 4, the level | step difference dimension of the sandbag of the upper and lower stages can be adjusted with the front-back dimension of a space-filling material.

  According to the configuration of claim 5, it is possible to prevent the falling of the falling rock and the like, and stop the falling rock and the like at the front.

  According to the configuration of claim 6, the shock absorbing effect is improved by the synthetic resin foam.

  According to the structure of Claim 7, an impact force can be disperse | distributed by a load distribution surface, and an impact can be absorbed by several sandbags.

It is a side view of the protection structure which shows Example 1 of this invention. It is a front view same as the above. It is a side view of a stacker same as the above. It is a schematic perspective view of the protection structure which a part of a net body omitted illustration same as the above. It is a schematic perspective view of a protective structure same as the above, and the same. It is a side view of the bag body of the same as the above, the same, sandbag. It is a top view of a sandbag same as the above. It is a bottom view same as the above. It is a development of a main net body same as the above. It is a front view of a left and right net body same as the above. FIG. 10 is a front view of the connection receiving portion of the binding material. The same as above, is an explanatory view of the binding material, and FIG. 12 (A) shows a state in which the diameter of the connection receiving portion is expanded before the diameter of the connection receiving portion is expanded. FIG. 10 is an enlarged explanatory view of a connection receiving portion in the connection state. FIG. 14 is an explanatory view for explaining the work of packing the dimensions of the net, and FIG. 14 (A) shows the work before the work and FIG. 14 (B) shows the work after the work. It is explanatory drawing which shows the repair method of a net | network same as the above. It is a side view of the protection structure which shows Example 2 of this invention. It is a front view of a load distribution side same as the above. It is an enlarged front view of the end of a load distribution side same as the above. It is a side view of the protection structure which shows Example 3 of this invention. It is a front view of the load distribution side which notched the part same as the above. FIG. 21 is an enlarged cross-sectional view taken along line AA of FIG. FIG. 21 is an enlarged sectional view taken along the line B-B in FIG. It is an expanded sectional view of the principal part of a load distribution side same as the above. It is a side view of the protection structure which shows Example 4 of this invention. It is an expanded view of the main net body which shows Example 5 of this invention.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. Moreover, not all of the configurations described below are necessarily essential requirements of the present invention.

  1 to 15 show Embodiment 1 of the present invention. As shown in the same figure, the sandbag protection structure 1 (hereinafter referred to as the protection structure 1) comprises a stacker 3 in which a plurality of sandbags 2 are arranged side by side and in the front and back direction and a plurality of sandbags of the stacker 3 2 is provided with a rope material 21 which is a binding material for tying 2 at each stage, and a net body 5 which covers the outer surface of the stack 3.

  The sandbag 2 is formed by filling a sandbag bag 6 made of cloth with particulate matter such as local soil. As shown in FIGS. 6 to 8 etc., the bag 6 has a bottomed cylindrical shape and has a lid 7 for closing the upper opening, and the straps 8, 9 are sewn around the bag 6 It is attached by wearing.

  Specifically, the band-like suspension bands 8 and 9 are bottom surfaces 8T and 9T arranged to intersect at the bottom surface 6T of the bag 6 and side surfaces of the bag 6 upward from both sides of the bottoms 8T and 9T. It has side portions 8S, 8S, 9S, 9S vertically installed along the portion 6S, and hanging portions 10, 10 connecting the upper ends of the side portions 8S, 9S, 8S, 9S adjacent to each other above the bag body 6 . In addition, the cloth of the bag body 6 for sandbags is preferably excellent in durability, and made of polypropylene, polyester, polyamide, polyethylene or the like is used.

  As shown in FIG. 1, FIG. 2 and FIG. 4, etc., in this example, the sandbags 2 are stacked in three stages, and the first stage (lowermost stage) arranges six sandbags 2 on the left and right and three back and forth The sandbags 2 are aligned to form a first sandbag layer 11. The front side is the mountain side. The second step (middle step) above the first sandbag layer 11 arranges five sandbags 2 on the left and right, and arranges two sandbags 2 on the front and back to form a second sandbag layer 12 . The third step (upper step) above the second sandbag layer 12 arranges four sandbags 2 on the left and right, and arranges two sandbags 2 on the front and back to form a third sandbag layer 13 There is.

  In the length direction of the protective structure 1, the second sandbag layer 12 has one less sandbag 2 than the first sandbag layer 11, and the third sandbag layer 13 is a second sandbag layer. Compared to 12, the number of sandbags 2 is one less. In this case, as shown in FIG. 2, on the left and right sides of the protective structure 1, the upper sandbag layers 12 and 13 are shifted to the center side by half of the sandbag 2 with respect to the lower sandbag layers 11 and 12. ing.

  Further, in the second sandbag layer 12, a space 14 is provided between the front and rear sandbags 2 and 2 by filling the space material, and in this space 14 a block 15 of synthetic resin foam as a space material is provided. The block 15 has a rectangular parallelepiped shape.

  Examples of the synthetic resin foam include expanded polystyrene, expanded polyethylene, expanded polypropylene, expanded urethane and the like. Specifically, a block 15 having the height of the stuffing space 14 and having a thickness corresponding to the front-rear width of the stuffing space 14 is stuffed in the stuffing space 14. The height of the block 15 may be slightly lower than the height of the space 14. Moreover, the length dimension of the left-right direction of the structure 1 of the block 15 can be made larger than a height dimension, and arrange | positions the several block 15 in the left-right direction of the protective structure 1 without gap.

  The compacted space 14 may be filled with foamable synthetic resin by arranging the small blocks 15 in the front, back, left, and right and stacking them.

  The lateral width of the protective structure 1 of the block 15 is larger than the width (diameter) of the sandbag 2 and a plurality of blocks 15 are arranged in the lateral direction to form a padding. The front and rear width of the block 15 is 1/2 or less and 1/3 or more of the front and rear width of the sandbag 2. In this case, if the front and rear width of the block 15 exceeds 1/2, the steps 16 and 17 become small and easily become unstable. If the front and rear width is less than 1/3, the buffer action of the block 15 is sufficiently obtained. There is no side. Further, from the front-back width of the front step 16 of the lower sandbag layers 11 and 12 and the upper sandbag layers 12 and 13 in the front surface 1A of the protective structure 1, the sandbag layers 11 and 12 in the lower surface of the rear surface 1B of the protective structure 1 The front and rear widths 17 of the upper and lower sandbag layers 12 and 13 are formed to be large. When the sandbags 2 are stacked, a part of the surface in contact with the adjacent sandbags 2 is deformed into a substantially planar shape, so that the width and width of the stacked sandbags 2 are slightly smaller than the diameter. For this reason, the said each dimension which concerns on the sandbag 2 is a thing of the state piled up side by side.

  By stacking the sandbags 2 as described above, as shown in FIG. 3, the inclination angle θ of the front surface 1A of the protective structure 1 is set larger than the inclination angle of the rear surface 1B, and the inclination angle θ is an angle formed with the horizontal. . The inclination angle θ is, for example, an angle between a horizontal line and an imaginary line 18 connecting the upper edge corner 2K of the lowermost sandbag 2 and the upper edge corner 2K of the uppermost sandbag 2 in the front surface 1A. (Less than 90 degrees), and the upper edge corner 2K of the sandbag 2 in the middle stage is also located approximately at the imaginary line 18. In this case, since the sandbag 2 is partially deformable, the virtual line 18 and the inclination angle θ can be obtained by averaging the entire sandbag 2. Further, the front face 1A is the receiving side and faces the mountain side, etc., and is the side that receives impact force such as falling rock, fallen earth and sand, and avalanche, and the rear face 1B is the valley side (anti-mountain side).

  In addition, the inclination angle θ of the front surface 1A is 73 degrees to 85 degrees (73 degrees or more and 85 degrees or less), preferably 80 degrees to 85 degrees, thereby preventing a rockfall from passing over the protective structure 1 And the sandbag 2 can be stably stacked.

  And although it is not publicly known, even if the sandbags 2 of the same shape are stacked as a protective structure, in the case of only the sandbags, when the bottom sandbags are three back and forth, the middle sandbags two back and forth, the top sandbags back and forth 1 It is common to stack individual pieces from the viewpoint of stability, and this reduces the amount of sandbags that can be used, the impact absorption capability is inferior to that of the present embodiment, and the inclination angle θ of the front surface 1A decreases. If the inclination angle θ of the surface on the mountain side becomes smaller, there is a greater possibility that the falling rock falling from the mountain will hit the front and then get over along the inclination.

  The sandbags 2 of the respective stages are bound by the rope material 21 which is a binding material for each stage, and the rope material 21 is made of synthetic resin and has flexibility. The rope member 21 includes a plurality of wire rods 22 and 23 formed by twisting synthetic resin fiber yarns, and the plurality of wire rods 22 and 22 are arranged in one spiral direction, and the plurality of wire rods 23 and 23 .. Are arranged in the other side spiral direction intersecting with the one side spiral direction, and the one side direction wire 22 and the other side direction wire 23 are twisted so as to be alternately upside down, and the core material and the center material No wire rod is inserted, and the connection receiving portion described later has a hollow shape. In this example, two one-side directional wires 22, 22 are arranged as one unit wire 22T, and two other side wires 23, 23 are arranged and twisted as one unit wire 23T.

  Further, a plurality of connection receiving portions 24 are partially formed on the rope member 21 and the connection receiving portions 24 are more gently twisted than the other twisting portions. Specifically, in the connection receiving portion 24, the helical angle θR of the wires 22 and 23 is smaller than that of the other portions, and the unit wires 22T and 23T are loosely twisted.

  Therefore, as shown in FIG. 12, when a force is applied so as to shorten the connection receiving portion 24 by holding the both sides of the connection receiving portion 24, the wires 22 and 23 expand to the outer peripheral side and expand in diameter to become hollow. The end 21T of the rope material 21 is inserted into the inside of the connection receiving portion 24 from between the opened unit wires 22T, 23T, and the end 21T of the rope 21 from the other opened unit wires 22T, 23T. Can be pulled out.

  When tension is applied to the rope material 21 thus formed in a ring shape, as shown in FIG. 11, the wires 22 and 23 of the connection receiving portion 24 are in pressure contact with the outer periphery of the rope material 21 inside to be connected and fixed. When the wires 22 and 23 of the connection receiving portion 24 bulge outward, the spiral angle θR of the wires 22 and 23 becomes large. In FIG. 11, the upper end 21 </ b> T in the drawing is inserted through the connection receiving portion 24 in the middle of the rope 21 on the lower side in the drawing.

  The bag 6 is formed with an insertion hole 26 through which the rope material 21 is inserted. In this example, upper and lower insertion holes 26 are configured by forming vertical cuts at the center in the width direction of the side surface portion 8S of the suspension band 8. The insertion holes 26 and 26 are formed at the top and bottom of the center of the sandbag 2 in the height direction.

  And the sandbag layers 11, 12, and 13 of each step are bound with the ropes 21 and 21, respectively. Specifically, the rope members 21 are respectively inserted into the upper and lower insertion holes 26 and in the sandbag 2 located at the left and right front and rear corners, the insertion holes 26 of the adjacent side portions 8S and 9S, The rope material 21 is inserted through 26 and the other sandbags 2 are inserted through one of the insertion holes 26 of the side surface parts 8S and 9S located on the outer surface side of the sandbag structure 1, and the above-mentioned one end side The end 21T of the other end is inserted into the connection receiving portion 24, and the both ends 21T and 21T are pulled in the opposite direction so that the ring of the rope material 21 is reduced, and the connection receiving portion 24 is provided on the outer periphery on the end 21T side. By pressing, a plurality of sandbags 2 of the respective sandbag layers 11, 12, 13 are bundled.

  The net body 5 includes a central net body 31 which is a main net body, and left and right net bodies 32 and 32. As shown in FIG. 9, the central net body 31 has a rectangular shape as a whole, has a lateral width corresponding to the lateral width of the first sandbag layer 11, and has the longitudinal width of the lower surface 1 K of the protective structure 1. , The total length of the front and rear length of the front surface 1A, the front and rear width of the top surface 1J of the protective structure 1, and the front and rear width of the rear surface 1B, the width of the overlapping margin is added. The net body 5 is preferably made of high density black polyethylene. The front surface 1A, the rear surface 1B, and the top surface 1J are exposed outer surfaces of the stacker 3.

  The central net body 31 continuously has left and right edge rope members 34 and 34 in the longitudinal direction and edge rope members 35 and 35 in the left and right direction on its outer periphery, and the edge rope members 34, 35 and 34 , 35, by a plurality of longitudinal and lateral wires 36, 36A, a mesh 37 having a square mesh is provided. The mesh 37 is a penetrating non-connector mesh, and the square of the mesh is 41 mm, for example.

  Further, an intermediate rope member 38 in the left-right direction of the protective structure 1 is provided in parallel at a position away from the edge rope member 35 on one side in the length direction by the overlapping margin. An intermediate rope member 38A in the left and right direction is provided at a position separated by a length corresponding to the longitudinal width of the sandbag layer 11, and an intermediate rod in the lateral direction between the intermediate rope member 38A and the edge rope member 35 on the other side in the length direction. Rope members 38B are provided, and the ends of the intermediate rope members 38, 38A, 38B are connected to the left and right edge rope members 34, 34. Further, the net 37 is connected to the rope members 34, 35, 38, 38A, 38B respectively. In this case, one central net body 31 may be configured by combining a plurality of net bodies provided with an edge rope material around the net 37 integrally. The ropes 34, 35, 38, 38A, 38B have the same construction, and even if they are different, the ropes 34, 35, 38, 38A, 38B have higher tensile strength than the wires 36, 36A.

  And in the central net body 31, the portion between the edge rope member 35 on one side and the intermediate rope member 38 is the front rising portion 39, and the lower surface between the intermediate rope members 38 and 38A covers the lower surface 1K. It becomes the cover part 40. In the central net body 31, the remaining portions of the front rising portion 39 and the lower surface covering portion 40 cover the rear surface 1B, the upper surface 1J, and the front surface 1A. The front rising portion 39 is a portion of the overlapping margin.

  As shown in FIG. 10, the left and right net bodies 32, 32 are symmetrical in the front-rear direction, substantially corresponding to the left and right side shapes of the protective structure 1, and the lower part is the lower surface 1K of the first sandbag layer 11. The upper portion is formed in a substantially trapezoidal shape substantially corresponding to the upper surface 1J of the protective structure 1, and the upper and lower edge rope members 41 and 42 in the front and rear direction and the front and rear rope members 43 in the diagonal longitudinal direction , 44 in succession. The net 37 is stretched between the ropes 41, 42, 43 and 44.

  In addition, as a synthetic resin used for a rope material, a net body, etc., high density polyethylene etc. are suitable, and when using the high density polyethylene, specific gravity is 0.94 to 0.96. In addition, it is possible to improve the weather resistance by using carbon black or an ultraviolet absorber for the net body 5 as needed.

  Then, as shown in FIG. 9, the lower surface covering portion 33 is aligned with the installation location of the protective structure 1, the net body 5 is expanded, the lower surface covering portion 40 is aligned with the installation position, and the central net body 31 is expanded. A plurality of sandbags 2 are arranged on the lower surface covering portion 40 to form a first sandbag layer 11, and the rope material 21 is inserted into the insertion hole 26 of the sandbag 2 around the sandbag layer 11, and the rope material is connected to the connection receiving portion 24. A plurality of sandbags 2 are bound by passing through the end 21T of 21. In this case, although it is preferable to bind by using one rope material 21 in each of the upper and lower insertion holes 26, 26, two or more rope materials 21 may be used.

  The second sandbag layer 12 packs the blocks 15 into the stuffed space 14 after arranging the front and back sandbags 2 and 2 separated by the stuffed space 14 minutes. Alternatively, after the front and rear sandbags 2 are arranged, the block 15 is placed, and thereafter, the front and rear other sandbags 2 are arranged. Thereafter, the plurality of sandbags 2 and blocks 15 of the sandbag layer 12 are tied with the rope material 21. In addition, after arranging the sandbags 2 and 2 of back and front, it is excellent in workability if the block 15 is packed in the packing space 14.

  The sandbags 2 of the third sandbag layer 13 are bound by a rope material 21 to form a stacked body 3. Thereafter, the central net body 31 is placed on the rear surface 1B, the upper surface 1J, and the front surface 1A, and the edge rope member 35 is positioned below the front surface 1A. The front rising portion 39 of the central net body 31 is overlapped with the lower portion of the front surface 1A of the central net body 31 and coupled by a coupling coil 75. The coupling coil 75 is a coil made of a spring material or the like and is provided so as to be wound around the lower front net 37 of the central net body 31 and the edge rope 35 of the front rising portion 39.

  The left and right net bodies 32 are attached to the left and right sides of the stacker 3. The rope members 41, 42, 43, 44 around the left and right net bodies 32 are connected to the left and right edge rope members 34, 34 of the central net body 31 by the coupling coil 75, and in this coupling state, the rope members in the coupling coil 75. 41, 42, 43, 44 are stored. Thus, it is preferable that net bodies 31 and 32 connect rope materials 34, 41, 42, 43, and 44 whose tensile strength is higher than that of wires 36 and 36A of net 37. In addition, since the central net body 31 has a rectangular shape, a bent portion is generated when the substantially trapezoidal stacked body 3 is covered.

  Therefore, processing is performed to narrow the width of the upper part of the central net body 31 in the attached state. Specifically, as shown in FIG. 14, in order to shorten the middle rope material 38B located on the upper surface 1J which is the upper part, an overlapping portion 45 is formed on the middle rope material 38B. The overlapping portion 45 is formed by providing the bending portions 46 and 46 in the opposite direction at intervals in the middle rope material 38B, and is a portion where the middle rope material 38B overlaps by three lines, and the bending portion 46 is formed. , 46 and the intermediate rope member 38B are bound and fixed by the binding tool 47 or the like. As the binding device 47, a flexible member such as a synthetic resin string can be used. Also, a plurality of overlapping portions 45 can be provided depending on the dimensions to be reduced in order to shorten the length. Furthermore, the overlapping portion 45 may be formed on another rope material, and the overlapping portion 45 may be formed on the upper rope material 41, for example. Further, the overlapping portion 45 is not limited to one rope material. For example, as shown in FIG. 5, the overlapping portion 45 may be formed on the two connected rope members 34 and 41.

  When the overlapping portion 45 is formed on the intermediate rope member 38B, a substantially triangular overlapping portion 37J overlapping the two nets 37 is also formed on the net 37. Therefore, the broken line portion 37S of the net 37 continuous to the one bending portion 46 Are connected to the lower net 37. In this state, three nets 37 overlap. The connection may use the coupling coil 75 or a binding tool. In this manner, the stack body 3 can be covered by the net body 5 in a state where there are few surplus portions and wrinkles.

  In the protective structure 1 constructed in this way, foundation work etc. are unnecessary, and even if it is a temporary installation to be removed later, it can be easily constructed. Moreover, since it is not fixed at the installation location, removal is easy. Become. Further, even in the case of permanent installation, a predetermined strength can be obtained.

  In addition, since the large-sized sandbag 2 is mainly stacked in multiple stages, the construction is excellent, and the construction time can be shortened at a site where there is a time restriction such as recovery from disaster response.

  Further, since the rope material 21 used for binding has the connection receiving portion 24 in which the braiding is changed at a predetermined pitch, the end portions of the rope material 21 can be easily connected to each other, and the connection receiving portion 24 The strength of the rope material 21 can be substantially maintained as it is, to secure the connection strength.

  Furthermore, the filling material of the sandbag 2 can use a wide range of materials including locally generated soil, and can contribute to the recycling of construction generated soil.

  Then, since the multiple sandbags 2 are bound by the rope member 21 in each step and the multistage sandbags 2 are integrated by the net body 5, when the sandbag protection structure 1 receives a falling stone, the impact force Since it is transmitted to the plurality of sandbags 2 and absorbed by the plurality of sandbags 2, the shock absorbing effect is excellent.

  Further, the slope angle θ of the front face 1A is 73 degrees to 85 degrees, and the sandbags 2 can be stably stacked together with the binding of the sandbags 2 of each step, and the rock fall protects the protective structure 1 It can prevent overcoming.

  By the way, if a falling rock collides and the bag body 6 of the sandbag 2 is damaged and repair is necessary, as shown in FIG. 15, the net 37 of the net body 5 at a portion corresponding to the damaged sandbag 2 is partially After cutting, repairing the bag body 6 or replacing the damaged sandbag 2, a larger repair net 37H is applied to the cut portion 37K of the net 37 to join the overlapping part of the net 37 and the repair net 37H. It connects by the coil 75. In addition, when replacing the sandbag 2, when the damaged and torn sandbag 2 is removed, the rope material 21 can be loosened by that amount, so the diameter of the connection receiving portion 24 is loosened and the rope material 21 is loosened. After arranging 2, the rope material 21 can be tightened and tied. The repair net 37H preferably includes the edge rope material 35H at the periphery. In addition, since the sandbags 2 and 2 are not connected at the upper and lower stages, repair can be easily performed.

  As described above, in the present embodiment, the stacker 3 in which a plurality of sandbags 2 are arranged in the left and right direction and the front and back direction and the plurality of sandbags 2 arranged in the left and right direction and the front and back direction And the net body 5 covering the front surface 1A, the rear surface 1B, and the upper surface 1J of the outer surface of the stack 3, the plurality of soil bags 2 integrated in each step by the rope material 21 By covering with the net body 5, the shock absorbing effect becomes excellent.

  Thus, in the present embodiment, the net body 5 is a main net body which is a main net body continuously provided on the front face 1A, rear face 1B, upper face 1J and lower face 1K of the stack 3 corresponding to claim 2 Since the front net 1A, the rear face 1B, the upper face 1J and the lower face 1K are covered by the central net body 31, the sandbags 2 of multiple stages are integrated, and the shock absorbing effect can be further improved. Moreover, the operation | work which covers the stacking body 3 by the center net body 31 can be performed simply.

  As described above, in the present embodiment, the net body 5 includes left and right net bodies 32, 32 provided on the left and right sides of the stack 3 corresponding to the third aspect, and these left and right net bodies 32, 32 are Since the entire surface of the stack body 3 is covered and integrated by the net body 5 since it is connected to the central net body 31 which is the main net body, the impact force such as falling rock is absorbed by the sandbag 2 in a wide range Can.

  As described above, in the present embodiment, in accordance with the fourth aspect of the present invention, the block 15 which is a space-filling material narrower than the longitudinal width of the sandbag 2 is provided between the front and back sandbags 2. The step size of the upper and lower sandbags 2 and 2 can be adjusted by the front and rear dimensions of.

  As described above, according to the fifth embodiment, the front and rear steps 16 and 17 of the upper and lower sandbags 2 and 2 have smaller front surfaces 1A than the rear surface 1B. Can be stopped at the front 1A.

  As described above, in the present embodiment, in accordance with the sixth aspect of the present invention, since the block 15 serving as the spacer is a synthetic resin foam, the shock absorbing effect is improved by the synthetic resin foam.

  Hereinafter, as an effect in the embodiment, since the connection receiving portion 24 is partially formed in the rope material 21, connection between the end portions of the rope material 21 is facilitated. Further, since the sandbag 2 can be stably bound by the upper and lower two-step rope members 21 and 21, and the insertion holes 26 and 26 are provided at the upper and lower sides of the sandbag 2, the upper and lower two-step rope members 21, Installation of 21 becomes easy. In the sandbag 2 in which the ropes 21 and 21 are respectively inserted into the upper and lower insertion holes 26 and located at the left and right front and rear corners, ropes are inserted into the insertion holes 26 and 26 of both adjacent side portions 8S and 9S. By inserting the material 21 and inserting the rope material 21 into the insertion hole 26 of either one of the side surface portions 8S and 9S located on the outer surface side, the other sandbags 2 stabilize the plurality of the sandbags 2 lined up in the front and rear And can be tied securely.

  Further, since the central net body 31 has a rectangular shape, handling is easy, and further, since the left and right net bodies 32, 32 are symmetrical in the front-rear direction, handling becomes easy. Further, since the central net body 31 has the front rising portion 39, the connection work of the end portion of the net body 31 at the lower front side of the protective structure 1 becomes easy.

  Further, when the overlapping portion 45 is formed on the intermediate rope member 38B by narrowing the left and right width of the upper part of the central net body 31 in the attached state, the overlapping portion 37J is also formed on the net 37 By connecting the broken line portion 37S of the net 37 continuous with the part 46 to the lower net 37, the net body 5 can cover the stack body 3 with a small amount of surplus portions, wrinkles and the like.

  Furthermore, the lower surface covering portion 33 is aligned with the installation location of the protective structure 1 to expand the net body 5, and the lower surface covering portion 40 is aligned with the installation position to expand the central net body 31. The stack body 3 is constructed, and the developed central net body 31 is placed on the exposed outer surface of the stack body 3 to connect the end sides of the central net body 31 with each other to connect the stack body 3 to the net body. Since the construction method of the structure 1 covered by the central net body 31 of No. 5 is adopted, the built-up body 3 can be covered by winding the central net body 31 and the construction method of the sandbag protective structure 1 excellent in construction Can be provided.

  16 to 18 show a second embodiment of the present invention, in which the same parts as those of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. In this example, a rhombus wire mesh 50 which is a metal mesh is provided on the front surface 1A and the upper surface 1J of the protection structure 1, and the rhombus wire mesh 50 is attached to the protection structure 1 outside the net body 5, In this example, they are provided overlapping on the outside of the net body 5. The rhombus wire mesh 50 constitutes a load distribution surface.

Galvanized steel wire 51 is used for the rhombus wire mesh 50, and as shown in FIG. 17, the steel wire 51 in the vertical direction is bent downward at approximately 85 degrees from the top to the bottom by about 85 degrees and bent A rhombus or square mesh in which the portions 52, 52 are formed and the bent portions 52, 52 of adjacent steel wires 51, 51 are engaged to form the engagement portion 53, and the diagonal four sides are formed of the steel wires 51. A plurality of 54 are formed. The steel wire 51 preferably has a tensile strength TS of 880 N / mm ² or more. Moreover, tensile strength is the largest tensile stress which appears in a material before it breaks, and it is based on JISZ2241. Further, as the galvanized steel wire 51, one based on the standard of JIS G 3548 is used.

  As an example, the diamond wire mesh 50 has a diameter of the steel wire 51 of 3.2 mm, a size of the mesh 54 of 50 mm × 50 mm (for a design load of 100 kJ), a diameter of the steel wire 51 of 4.0 mm, and a mesh 54 A 50 mm × 50 mm (for a design load of 300 kJ), a diameter of the steel wire 51 of 4.0 mm, and a mesh size of 40 mm × 40 mm (for a design load of 500 kJ) are used. When the size of the mesh 54 is 50 mm × 50 mm, it indicates the distance K between the parallel steel wires 51, 51 forming the mesh 54 and the distance between the remaining steel wires 51, 51.

  As shown in FIG. 18, at the upper and lower edges of the rhombus wire mesh 50, at least one of the pair of left and right steel wires 51, 51 in the engagement portion 53 is bent toward the steel wires 51, 51 in this example. A complete knuckle processing portion 55 is formed. Further, as shown in FIG. 17, in the left and right width direction edge 50F of the rhombus wire mesh 50, a plurality of bent portions 52, 52... There is. In addition, when the left-right space | interval of the protective structure 1 is wide, what connected edge parts 50F and 50F of several rhombic wire nets 50 and 50 integrally is used. The edge 50F of the rhombic wire mesh 50 may be one in which the complete knuckle processing parts 55, 55,... Are vertically aligned.

  The edge 50F of the rhombic wire mesh 50 is connected to the coupling coil 75. Specifically, the edge 50F of the rhombic wire mesh 50 is connected by a plurality of coupling coils 75. Further, the rhombus wire mesh 50 is connected to the central net body 31 and the rope member 21 by the coupling coil 75 or the like. Alternatively, the rhombus wire mesh 50 may be coupled to the central net body 31 or the rope material 21 using other binding devices.

  Then, by providing the rhombus wire mesh 50 on the front surface 1A, when the fallen earth and sand or snow fall is received on the front surface 1A, the load distribution range is expanded by the surface rhombus wire mesh 50, and transmitted to the stacker 3 for impact absorption effect. Can be improved.

  As described above, in the present embodiment, the same operation and effect as the first embodiment can be obtained.

  Also, as described above, according to the seventh embodiment, since the rhombus wire mesh 50 serving as the load distribution surface is provided on the outside of the net body 5 on the front surface 1A of the stacker 3, it is harder than the net body 5. The impact force can be dispersed by the surface of the rhombic wire mesh 50, and the plurality of sandbags 2 can absorb the impact.

  FIGS. 19 to 23 show a third embodiment of the present invention, in which the same reference numerals are given to the same parts as those of the above-mentioned respective embodiments, and the detailed description thereof will be omitted and described in detail. In this example, the front surface 1A of the protective structure 1 is provided with a panel 61 serving as a load distribution surface.

  As shown in FIG. 19, the panel 61 is provided with face materials 62, 62 arranged at intervals in the front and rear direction, and a keystone plate, which is a bent steel plate, is used as the face materials 62, 62. In addition, the facing 62 is formed long in the left-right direction of the sandbag protection structure 1, and the width direction of the facing 62 is vertically juxtaposed in the height direction of the protection structure 1 without gaps. The concave portions 63 and the convex portions 63A of the face material 62 are alternately formed side by side in the vertical direction. A plurality of rectangular steel pipes 64, which are vertical members, are arranged at intervals in the left-right direction between the front and rear face materials 62, 62, and the rectangular steel pipes 64 have substantially the same height as the panel 61. . In this example, as shown in FIG. 20, a short surface material 62 is provided at the lower part of the panel 61.

  As shown in FIG. 21, left and right diagonal rib plates 65, 65 are provided in the square steel pipe 64, and these left and right diagonal rib plates 65, 65 are made of steel and the front edge thereof is square steel pipe 64. It fixes or abuts on the inner surface left and right center, and fixes or abuts the rear edge on the inner surface of the rear left and right corners of the square steel pipe 64. In this case, when the impact force is received, the rear side of the cross section of the square steel pipe 64 which is a tensile region is reinforced by the diagonal rib plates 65 and 65.

  A connection structure 66 connecting the front and rear face materials 62 and 62 and the square steel pipe 64 is provided. The connection structure 66 includes large and small steel U-shaped members 67 and 68, a bolt 69 and a nut 70. As shown in FIG. 23, the bolt 69 and the nut 70 are used together with the washers 69W and 70W. The U-shaped member 67 is used at the upper and lower butting points 71 of the face materials 62, 62, and the U-shaped member 68 is used at the end (upper end) of the face material 62. The U-shaped members 67 and 68 integrally have web portions 67A and 68A disposed in the front and rear direction and left and right flange portions 67B, 67B, 68B and 68B provided at both ends of the web portions 67A and 68A. The U-shaped steel members 67 and 68 are partially disposed in the square steel pipe 64.

  As shown in FIG. 22, the face materials 62 and 62 of the front face 61A partially overlap the convex portions 63A and 63A, which are the end edges of the face material 62, at the butt points 71. Using a steel horizontal plate 72 such as a flat bar having a width that abuts on the rear surfaces of the upper and lower recesses 63, 63, this horizontal plate 72 abuts on the rear surface of the recesses 63, 63. The horizontal plate 72 is disposed along the entire length of the panel 61 in the left-right direction.

  In addition, the U-shaped members 67, 67 are disposed on the left and right of the square steel pipe 64, and the square steel pipe 64 is sandwiched from the left and right by the U-shaped members 67, 67. Fixing members 73, 73 made of steel plate are disposed, and the bolt 69 is inserted into the through holes of the flange portion 67B, the side plate 72, the surface member 62 and the fixing member 73 from the rear side of the front flange portion 67B. A nut 70 is screwed into a bolt 69 and tightened. As shown in FIG. 23 etc., a through hole 72T is bored in the horizontal plate 72 corresponding to the bolt 69, and an intermediate nut 74 screwed to the bolt 69 is disposed in the through hole 72T. doing. The U-shaped member 67 has two bolts 69 inserted through the flange portion 67B. Then, by sandwiching the relatively thin face material 62 between the thicker side plate 72 and the fixing member 73, it is possible to tighten and fix the face material 62 with the bolt 69 and the nut 70 without applying an excessive force to the face material 62. .

  On the other hand, the U-shaped member 68 and the horizontal plate 72 disposed at the upper end of the front face 61A are narrower in width than the U-shaped member 67, that is, shorter in the vertical direction, and one bolt 69 is attached to the flange portion 68B. It is inserted. Further, the through hole 72T is bored in a horizontal plate 72A whose upper and lower width is narrower than the horizontal plate 72, and the intermediate nut 74 is disposed in the through hole 72T.

  The face materials 62 and 62 of the rear surface 61B partially overlap the convex portions 63A and 63A at the butt portion 71, and the fixing members 73 and 73 are disposed on the back surfaces of the upper and lower concave portions 63 and 63 of the butt portion 71. And the bolt 69 is inserted into the through holes of the flange portion 67B, the surface member 62, and the fixing member 73 from the front side of the rear flange portion 67B, and an intermediate nut 74 between the flange portion 67B and the surface member 62. The bolt 69 is screwed to the screw 70, and the nut 70 is screwed to the bolt 69 and tightened. The U-shaped member 67 has two bolts 69 inserted through the flange portion 67B. In any case, the intermediate nut 74 may be used as needed, and the central nut 74 may not be used.

  On the other hand, the U-shaped member 68 and the horizontal plate 72 disposed at the upper end of the rear surface 61B are narrower in width than the U-shaped member 67, and one bolt 69 is inserted and fixed in the flange portion 68B. .

  And, by providing the panel 61 on the front face 1A, when the fallen earth and sand and snow fall are received on the front face 1A, the load distribution range is expanded by the flat panel 61 and transmitted to the stack 3 to improve the shock absorbing effect. can do. Furthermore, the impact force can be alleviated by the deformation of the spaced-apart facing materials 62, 62. The panel 61 is attached to the front surface 1A by fixing means (not shown).

  As described above, in the present embodiment, the same operation and effect as the above-described embodiments can be obtained.

  Further, in this embodiment, in accordance with the seventh aspect of the invention, since the panel 61 serving as the load distribution surface is provided outside the net body 5 on the front surface 1A of the stacker 3, the impact force is dispersed by the panel 61 The sandbag 2 can absorb shocks.

  Hereinafter, as an effect of the embodiment, since the concave portions 63 and the convex portions 63A are alternately formed side by side in the face material 62, the cross-sectional performance can be improved even if it is thin. The material 62 is deformed to absorb a part of the material 62, and the impact force can be transmitted to the plurality of soil bags 2 of the stack 3 by the surface materials 62, 62, the square steel pipe 64 and the like. Further, since the diagonal rib plates 65, 65 are provided in the square steel pipe 64, the cross-sectional performance of the square steel pipe 64 is improved. Further, since the connecting structure 66 uses the bolt 69, it is excellent in on-site assembling workability as compared to welding and the like, and is also advantageous for carrying in to the site. Further, the horizontal plate 72 through which the bolt 69 is inserted also functions as a horizontal beam, and the strength of the panel 61 can be secured.

  FIG. 24 shows a fourth embodiment of the present invention. The same reference numerals as in the above embodiments denote the same parts, and a detailed description thereof will be omitted. In the protective structure 1 of this example, the sandbags 2 are stacked in four stages, and the lowermost sandbag layer 81 is provided below the stacker 3 of the first embodiment.

  The first stage (bottom stage) arranges eight sandbags 2 on the left and right, arranges four sandbags 2 on the front and back, and arranges one more than the first sandbag layer 11. In addition, the upper edge corner 2K of the sandbag 2 in the front row of the lowermost sandbag layer 81 is aligned with the inclination angle θ of the front surface 1A, while the sandbag 2 in the rear row of the lowermost sandbag layer 81 protrudes backward. However, the sandbag 2 of the first sandbag layer 11 is partially placed on the front side of the sandbag 2 in the rear row of the lowermost sandbag layer 81.

  In the first stage sandbag layer 81, the number of sandbags 2 is smaller by one in the left-right direction as compared with the first sandbag layer 11, and as shown in Example 1, in the left and right sides of the protective structure 1, The upper sandbag layers 11, 12 and 13 are overlapped with the lower sandbag layers 81, 11 and 12 by half in the left-right direction of the sandbag 2 so as to be stacked on the center side.

  As described above, in the present embodiment, the same operation and effect as the above-described embodiments can be obtained, and as in this embodiment, the protective structure 1 may have the sandbags 2 stacked in four or more stages. Furthermore, in this example, the number of sandbags 2 in the lower sandbag layer 81 can be increased, and the overall weight of the stacked body 3 can be increased, whereby the shock absorbing effect can be improved.

  FIG. 25 shows a fifth embodiment of the present invention, in which the same reference numerals are given to the same portions as those of the above-mentioned respective embodiments, and the detailed description thereof will be omitted to be described in detail. This example shows a modification of the net body 5. As shown in the figure, the mesh 37A of the lower surface covering portion 40 has a mesh larger than the mesh 37 of the remaining part. That is, the intervals of the wires 36, 36, 36A, 36A are made wide.

  As described above, in the present embodiment, the same operation and effect as those in the above-described embodiments can be obtained, and in the present embodiment, the lower surface covering portion 40 has lower strength than other portions because it is not directly received impact force such as falling rock. Since the number of members in the lower surface covering portion 40 can be reduced, the central net body 31 can be made inexpensive as a whole.

  The present invention is not limited to the present embodiment, and various modifications can be made within the scope of the present invention. For example, in claim 1, it is not necessary to cover the lower surface of the stack by the net body, in which case a central net body without the lower surface covering portion is formed, and the outer surface of the stack is covered by this central net body. The central net body may be attached to the stacker, or the lower end of the central net body may be fixed to the installation location by an anchor or the like. In addition, sandbags for vegetation may be used, and those provided with seeds grown by the soil inside the bag of the sandbags can be used. Furthermore, the net of the net body may have a diamond shape. Also, various kinds of space-filling materials can be used. Furthermore, the imaginary line is not limited to a straight line, and may be a curve, and in the case of a curve, the inclination angle may be obtained by averaging. Also, after the left and right net bodies are connected to the central net body in the unfolded state, sandbags may be stacked. Furthermore, a net body having a shape in which the left and right net bodies are connected to the central net body may be formed at a factory. Also, the overlapping portion can be appropriately provided where it is necessary to close the length of the rope material, and in the embodiment, the example has been described in which the left and right width of the net body is narrowed. It may be provided to close the dimensions. In addition, the configurations of the embodiments can be combined as appropriate, and, for example, a panel can be provided on the front surface of the rhombic wire mesh as appropriate.

1 Sandbag protection structure 1A front (outside)
1B Rear surface (outside)
1K bottom (outside)
1J Top surface 2 Sandbag 3 Stacking body 5 Net body 11 1st sandbag layer 12 2nd sandbag layer 13 3rd sandbag layer 14 Spacing space 15 block (space filling material)
16 steps (front)
17 steps (after)
21 Rope material (tie material)
31 Central net body (main net body)
32 left and right net body 37 net 50 rhombus wire mesh (load distribution surface)
61 panel (load distribution surface)
81 Bottom sandbag layer

Claims (7)

A stacked body in which a plurality of sandbags are arranged side by side and in the front and back direction and stacked,
A binding material for binding the plurality of sandbags arranged in the lateral direction and the longitudinal direction;
And a net body covering an outer surface of the stacker. 2. The sandbag protection structure according to claim 1, wherein the net body comprises a main net body provided continuously on the front, rear, upper and lower surfaces of the stacker. The sandbag protection according to claim 2, wherein the net body comprises left and right net bodies provided on left and right sides of the stacker, and the left and right net bodies are respectively connected to the main net body. Structure. The sandbag protective structure according to any one of claims 1 to 3, wherein a padding material is provided between the front and rear sandbags and is narrower than the front-rear width of the sandbags. The sandbag protection structure according to any one of claims 1 to 4, wherein the steps of the upper and lower sandbags have a front surface smaller than the rear surface. 5. The sandbag protection structure according to claim 4, wherein the spacer is a synthetic resin foam. The sandbag protection structure according to any one of claims 1 to 6, wherein a load distribution surface is provided outside the net body on the front surface of the stacker.