JP2020070607A - Soil retaining cage structure and method for forming the same - Google Patents

Abstract

To provide a soil retaining cage structure having a structure for preventing deformation of the cage due to subsidence of sediment and excessive subsidence of the sediment when the sediment is put into the cage made of wire mesh.SOLUTION: Soil retaining cage structures 101 and 102 comprise: a cage made of wire mesh filled with sediment 20 and formed by combining a plurality of wire mesh panels; sheet members 24, 26 arranged inside at least a front surface of the cage; and the sediment 20 filled inside the cage. The wire mesh panel is made of welded wire mesh. Inside the sediment 20 being inside the case, an insole wire mesh 40 is arranged substantially horizontally. The insole wire mesh 40 is connected to a rear surface 34 of the cage by a rear surface side connecting member 46 and is connected to a front surface 32 of the cage by a front surface side connecting member 42. The sheet members 24 and 26 arranged on a front face prevent the sediment 20 from being discharged to an outside of the cage, and are vertically divided at a position where the front side connecting member 42 is attached.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an earth retaining basket structure and a method for forming the same.

  Gabion and futon baskets are used for earth retaining walls and retaining walls by placing split stones in a cage made of wire mesh. However, the stones to be placed in the basket are required to be larger than the mesh of the wire mesh and have the same size. Therefore, when the construction is hurried, the supply may not be in time. On the other hand, if it is earth and sand, it can be easily obtained anywhere if excavation is carried out to set up a basket, so earth and sand are put in the basket.

  However, since the earth and sand have a smaller shearing resistance than the stones, there is a risk that the earth and sand will move due to earth pressure from the back and the cage will be deformed or stacking will collapse. Sediment has only been put into small, short baskets that do not collapse, or large baskets that have been reinforced to prevent deformation.

  In order to solve such a problem, in Patent Document 1, a filling material such as earth and sand is filled inside a car frame structure which is a box-shaped container formed of a rhombus wire mesh, a welded wire mesh, an expanded metal or the like. It is a cage frame structure for earth retaining that is constructed on retaining walls and dams by stacking blocks that have been block-stacked at the required height. There is disclosed a technique of interposing a sheet material that generates frictional resistance and suppresses deformation. Specifically, after putting the sand into the middle of the car frame structure and rolling it, put a sheet-like planar material such as non-woven fabric on it, and further put the sand on it, It forms a frame structure.

JP 2004-3261 A

  However, there is a problem that after the car frame structure for retaining soil is installed, the earth and sand settle down, the basket is deformed, and the height of the car frame structure itself becomes small. This problem cannot be solved by the technique disclosed in Patent Document 1, because the sheet-shaped planar material is simply placed on the earth and the earth is further placed. Moreover, this problem becomes remarkable when the size of the basket itself is increased.

  The present invention has been made in view of the above points, and an object thereof is to prevent deformation of a basket due to subsidence of earth and sand and excessive subsidence of the earth and sand when the earth and sand are put into a cage made of a wire mesh. Another object of the present invention is to provide a basket structure for retaining soil having a structure that

  The earth retaining cage structure of the present invention is a soil retaining cage structure in which earth and sand are filled in a cage composed of a wire mesh, and a cage formed by combining a plurality of metal mesh panels, and at least the inside of the front surface of the cage. A sheet member arranged and earth and sand filled in the basket, the wire mesh panel is made of welded wire mesh, and the insole wire mesh is arranged substantially horizontally inside the basket and inside the earth and sand. The insole wire mesh is connected to the rear surface of the basket by a rear surface side connecting member, and is connected to the front surface of the basket by a front surface side connecting member, and the sheet member arranged on the front surface. Has a structure in which the earth and sand are prevented from being discharged to the outside of the basket, and the earth and sand are divided into upper and lower parts at the position where the front side connecting member is attached.

  It is preferable that the sheet member arranged on the front surface is bent at its end portion side toward the inside of the basket at the vertically divided positions.

  It is preferable that the front surface side connecting member is attached to the front surface so as to be movable along an iron wire extending vertically in the welding wire mesh.

  The method for forming a basket structure for earth retaining of the present invention includes a step A of forming a basket by combining a plurality of wire mesh panels, and a first sheet member covering the inner lower half of the front surface of the basket and a part of the bottom surface. So as to be arranged, a step C in which earth and sand are put in the lower half of the basket, a step D in which the upper end portion of the first sheet member is bent backward and placed on the earth and sand, and Step E of placing an insole wire mesh on top, and connecting the insole wire mesh and the front surface with a front side connecting member, and an iron wire extending above and below the welded wire mesh of the wire mesh panel with respect to the front side connecting member. And a step G of connecting the insole wire mesh and the rear surface of the basket with a rear surface side connecting member, and a second sheet member on the inner upper half of the front surface of the basket and the insole wire mesh. The work to arrange so as to cover a part of And H, and a step I put sand in the upper half of the cage.

  Since the insole wire mesh is arranged substantially horizontally inside the cage made of wire mesh and the insole wire mesh is connected to the front and rear surfaces of the basket, even if the basket is filled with earth and sand, the sedimentation in the basket will not occur. It is also possible to prevent deformation and settlement of the basket.

1 is a schematic cross-sectional structure of an earth retaining basket structure according to an embodiment. It is a typical perspective view showing one process of forming the basket structure for earth retaining concerning an embodiment. It is a typical perspective view showing one process of forming the basket structure for earth retaining concerning an embodiment. It is a typical perspective view showing one process of forming the basket structure for earth retaining concerning an embodiment. It is a figure of a reinforcement stay. It is a typical perspective view showing one process of forming the basket structure for earth retaining concerning an embodiment. It is a typical perspective view showing one process of forming the basket structure for earth retaining concerning an embodiment. It is a typical perspective view showing one process of forming the basket structure for earth retaining concerning an embodiment. It is a typical perspective view showing one process of forming the basket structure for earth retaining concerning an embodiment. It is a typical perspective view showing one process of forming the basket structure for earth retaining concerning an embodiment. It is a perspective view showing a front side connecting member. It is a typical partial enlarged view showing a connecting structure of a front side connecting member and an insole wire mesh. It is a typical perspective view showing one process of forming the basket structure for earth retaining concerning an embodiment. It is a typical perspective view showing one process of forming the basket structure for earth retaining concerning an embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The description of the preferred embodiments below is merely exemplary in nature and is not intended to limit the present invention, its application, or its application. In the following drawings, for simplification of description, components having substantially the same function are designated by the same reference numeral.

(Embodiment 1)
FIG. 1 shows a schematic cross-sectional structure of the earth retaining cage structure according to the first embodiment. 2 to 4 and 6 to 10, 13 and 14 show a method of forming a basket structure for earth retaining according to this embodiment.

  FIG. 1 is a schematic cross-sectional structure in a state where the earth retaining cage structures 101 and 102 according to the present embodiment are stacked in two stages. The earth retaining cage structures 101 and 102 are formed by filling the earth and sand 20 in a cage formed by being surrounded by the front surface 32, the rear surface 34, the bottom surface 36 and the side surface 38. The front surface 32, the rear surface 34, the bottom surface 36, and the side surface 38 are wire mesh panels made of welded wire mesh.

  The 1st vegetation sheet 24 and the 2nd vegetation sheet 26 are arrange | positioned at the inner side of the front surface 32, and it has prevented the earth and sand 20 from going outside from the wire mesh of the front surface 32. Further, the second-stage earth retaining cage structure 102 is loaded from the front surface 32 of the first-stage earth retaining cage structure 101 rearward by a distance of ¼ of the depth of the cage. There is an upper surface wire net 52 serving as a lid on a portion of the upper surface of the first-stage earth retaining basket structure 101 where the second-stage earth retaining basket structure 102 is not placed, and a wire mesh of the front surface 32. It is connected to the panel by a coil 22c. Since the entire upper surface of the second-stage earth retaining cage structure 102 is exposed, an upper surface metal net 54 serving as a lid is placed on the entire upper surface and connected to the front surface 32, the rear surface 34, and the coil 22c.

  Next, a method for forming the earth retaining basket structures 101 and 102 of the present embodiment will be described.

  First, on the ground that has been leveled, the front wire netting panel 12 and the rear wire netting panel 14 having an L-shaped cross section are erected vertically from the ground, and the parts placed on the ground are parallel to each other. Place the ends of the butts against each other (Fig. 2). These wire mesh panels 12 and 14 are formed by bending a welded wire mesh. The ends of the portions of the wire mesh panels 12 and 14 placed on the ground are connected to each other by the coil 22a. When such L-shaped wire mesh panels 12 and 14 are used, the wire mesh panels 12 and 14 are self-supporting on the ground, and the front surface 32, the rear surface 34, and the bottom surface 36 can be formed at once only by connecting them by the coil 22a. Therefore, it can be formed in a short time without any trouble.

  Further, although only one front wire mesh panel 12 and one rear wire mesh panel 14 are shown in the drawing, a plurality of front wire mesh panels 12 and rear wire mesh panels 12 are provided so that a required length can be secured in the horizontal direction. 14 are arranged so that the respective side portions are adjacent to each other, and the adjacent portions are connected by a coil. This forms the front 32, back 34 and bottom 36 of the basket. Further, the cage is formed by connecting the wire mesh panel to the front surface 32 and the rear surface 34 at the side end by the coil 22b to form the side surface 38 (step A).

  Then, as shown in FIG. 3, the first vegetation sheet (first sheet member) 24 is installed inside the front surface 32 (inside the basket). The lower end side of the first vegetation sheet 24 is bent and placed on the bottom surface 36 of the basket, and the upper end thereof is arranged at a portion higher than the intermediate position in the height direction of the front surface 32 (step B). Preferably, the length of the first vegetation sheet 24 in the height direction is substantially the same as that of the front surface 32 of the basket, and ¼ of that is placed on the bottom surface 36 side.

  Next, as shown in FIG. 4, the reinforcing stay 28 is connected to the front surface 32 and the rear surface 34 below the basket. The reinforcing stay 28 is formed by bending both ends of a straight iron wire into a hook shape as shown in FIG. 5, and hooks the hook portion on the front surface 32 and the rear surface 34. The hooking position is preferably about 1/5 of the height of the front surface 32 and the rear surface 34. The reinforcing stay 28 prevents the front surface 32 and the rear surface 34 from expanding outward when the inside of the basket is filled with earth and sand.

  FIG. 6 is a schematic view of the basket with the reinforcing stay 28 installed, as viewed obliquely from above. The reinforcing stay 28 is hooked on the vertical line of the welded wire mesh that constitutes the front surface 32 and the rear surface 34. Further, the side surface 38 is connected to the bottom surface 36 by the coil 22d, and is also connected to the bottom surface 36 by the reinforcing stay 29 in order to prevent flapping (bulging outward).

  After that, as shown in FIG. 7, the earth and sand 20 are put in a basket to a height of a little less than 1/3 of the height of the basket, and a compaction is performed to compact the earth and sand 20. The earth and sand 20 are placed above the reinforcement stay 28 so that the reinforcement stay 28 is buried in the earth and sand 20 so that the reinforcement stay 28 does not interfere with the rolling operation. Further, the sand 20 is put to the height of a half of the basket, and the compaction is performed by compacting the sand 20 (FIG. 8). The step C is the step of adding the earth and sand 20 up to this point. At the time when the process C is completed, the surface of the earth and sand 20 is substantially horizontal.

  Then, as shown in FIG. 9, the first vegetation sheet 24 is bent backward (inside the basket) so that the upper end portion of the first vegetation sheet 24 protruding above the soil 20 is placed on the soil 20. (Step D).

  Next, as shown in FIG. 10, the insole wire netting 40 is placed on the earth and sand 20 and the upper bent portion of the first vegetation sheet 24 (step E). As the insole wire net 40, various kinds of wire nets, expanded metal, and the like can be used, but it is preferable to use a welded wire net. The insole wire net 40 is placed on the surface of the earth and sand 20 substantially horizontally. The term "substantially horizontal" does not mean "horizontal" in the strict sense, but refers to a horizontal degree corresponding to the surface state in the state where the compaction is performed in the step C.

  Then, the front side 32 of the basket and the insole wire net 40 are connected by using the front side connecting member 42 shown in FIG. 11 (step F), and the rear surface 34 of the basket and the insole wire net 40 are connected by using the rear side connecting member 46. (Process G). In the present embodiment, the rear surface side connecting member 46 is composed of a U-bolt, a metal plate provided with two holes through which the U-bolt is inserted, and two nuts, and is fixed to the vertical line of the welding wire mesh that forms the rear surface 34. It

  The front-side connecting member 42 is formed by bending a single metal wire rod, extends from both ends of a central linear portion 44 perpendicularly to the central portion 44, and extends from the middle to the central portion. It is provided with two hook portions 43 that are bent toward the portion 44 side. The hook portion 43 is formed in a plane perpendicular to the plane formed by the central portion 44 and the connecting portions to the hook portions 43 on both sides thereof.

  The front side connecting member 42 arranges the central portion 44 outside the front surface 32 of the basket in parallel with the horizontal line 94 of the welding wire mesh forming the front surface 32, and inserts the hook portion 43 into the inside of the basket from the mesh of the front surface 32. .. Then, as shown in FIG. 12, the hook portion 43 is hooked on the wire located at the front end of the insole wire net 40. By connecting in this manner, the central portion 44 abuts on the vertical line 92 of the welding wire mesh on the front surface 32 and can move up and down along the vertical line 92. Further, the connecting portion between the central portion 44 of the front-side connecting member 42 and the hook portion 43 is not limited to a horizontal arrangement, but may be an oblique arrangement such that the hook portion 43 is located above or below the central portion 44. It will be possible.

  Next, as shown in FIG. 13, the second vegetation sheet (second sheet member) 26 is installed inside the front surface 32 (inside the basket). In this embodiment, the second vegetation sheet 26 is the same as the first vegetation sheet 24. Similarly to the first vegetation sheet 24, the second vegetation sheet 26 is also bent at the lower end side and placed on a part of the front surface side of the insole wire net 40, the front surface side connecting member 42 and the earth and sand 20, and the upper end thereof is the front surface 32. Is located at a portion higher than the upper end of and is hung outside the front surface 32 (step H). Then, the reinforcing stay 28 is connected to the front surface 32 and the rear surface 34. The connecting position is preferably slightly below the upper ends of the front surface 32 and the rear surface 34.

  Then, the same amount of earth and sand 20 as in the steps shown in FIG. 7 to FIG. 9 is applied and the compaction is performed (step I), and the upper end side of the second vegetation sheet 26 is bent rearward so as to be placed on the earth and sand 20 ( 14), the main body of the earth retaining cage structure is completed. When the basket structure is not placed on this, a wire mesh panel to be a lid is placed on the entire upper surface. When an earth retaining cage structure or another cage structure is further placed on this, a wire mesh panel serving as a lid is placed on a portion where the upper surface is exposed other than the portion on which the cage structure is placed.

  In the cage structure for earth retaining according to the present embodiment, since the insole wire net 40 is arranged substantially horizontally inside the earth and sand 20 and is connected to the front surface 32 and the rear surface 34 of the earth and sand, the earth and sand 20 is compressed and settled. Even if subsidence occurs due to repeated dryness and humidity, the subsidence of the earth and sand 20 above the insole wire net 40 is received by the insole wire net 40 to prevent the effect on the earth and sand 20 below the insole wire net 40. As a whole, the degree of subsidence of the earth and sand 20 can be made smaller than that when the insole wire net 40 is not provided. Therefore, it is possible to prevent the height of the basket structure from becoming small and the basket from being deformed (the basket being inflated). Since the vegetation sheet is divided at the position where the front side connecting member 42 that connects the insole wire net 40 and the front surface 32 is present, the work of connecting the insole wire net 40 and the front surface 32 can be easily performed in a short time. .. Of course, the insole wire net 40 can suppress the horizontal deformation of the earth and sand 20.

  Since the front surface side connecting member 42 is movably attached to the front surface 32 along the iron wire extending vertically in the welding wire mesh, even if a force is applied downward to the insole wire mesh 40 due to the sinking of the earth and sand 20, the front surface side connecting member 42 is attached. The connecting member 42 can move downward. Assuming that the front-side connecting member 42 cannot move downward, a large force is applied to the insole wire net 40 and the front-side connecting member 42, which may deform or damage them, or the front surface 32 May be deformed. The rear surface side connecting member 46 is also fixed to the vertical line and can move downward, and at least can tilt downward.

  Further, since the upper end portion of the lower first vegetation sheet 24 and the lower end portion of the upper second vegetation sheet 26 are arranged so as to sandwich the front side connecting member 42, and are respectively bent inside the basket, The movement of the front side connecting member 42 to the lower side is not hindered, and the vegetation sheets 24 and 26 are not damaged by the movement of the front side connecting member 42 to the lower side. Then, even if the front-side connecting member 42 moves downward, the earth and sand 20 can be reliably prevented from coming out of the basket.

  Since the reinforcing stays 28 are installed at two positions in the up-down direction in one basket so as to sandwich the insole wire netting 40, the deformation of the front surface 32 and the rear surface 34 is further prevented. Further, when the earth and sand 20 are put in, the position of the reinforcing stay 28 is determined in advance so that it is located above the position where the reinforcing stay 28 is arranged, so if the reinforcing stay 28 is an obstacle when rolling. Work is easy.

  Since the central portion 44 of the front-face-side connecting member 42 is located outside and abuts against the wire mesh of the front face 32, even if the front face 32 is exposed, the risk to humans does not increase. Further, since the central portion 44 is almost indistinguishable from the horizontal line 94, it is less noticeable. On the other hand, in the rear surface side connecting member 44, the tip of the U-bolt projects outward, but the rear surface 34 is buried, so there is no danger to humans.

(Other embodiments)
The above-described embodiment is an exemplification of the present invention, and the present invention is not limited to these examples, and well-known techniques, common techniques, and well-known techniques may be combined or partially replaced with these examples. Modified inventions that can be easily conceived by those skilled in the art are also included in the present invention.

  The shape and configuration of the wire mesh panel forming the basket are not limited to those of the first embodiment, and for example, the front surface, the rear surface, and the bottom surface may each be formed by one wire mesh panel, or the bottom surface and the rear surface may be diamond-shaped wire mesh. You may form by the wire mesh panel which consists of. Further, an intermediate panel for reinforcement may be arranged inside the basket and connected to the front surface and the rear surface. The intermediate panel may be a wire mesh panel, or may have a structure in which a reinforcing iron wire is welded into a frame of the iron wire.

  The configurations of the front surface side connecting member and the rear surface side connecting member are not limited to those of the first embodiment. A U-bolt, a coil, or the like may be used as the front surface side connecting member, and a member, a coil, or the like shown in FIG. 11 may be used as the rear surface side connecting member.

  The insole wire mesh may consist of diamond-shaped wire mesh or expanded metal. Further, the arrangement position in the vertical direction is not limited to the center. Further, a plurality of insole wire nets may be arranged in one basket. A connecting member such as a hook may be attached to the insole wire net, and the front and / or rear surface and the insole wire net may be connected by the connecting member.

  The vegetation sheet may be any sheet as long as it has a function of closing the mesh of the wire mesh so that the soil does not come out from the mesh of the front surface.Other functions are not essential, but in the case of rainfall, water is discharged to the outside quickly. It is preferable to have water permeability.

12 front wire mesh panel 14 rear wire mesh panel 20 earth and sand 24 first vegetation sheet (first sheet member)
26 Second vegetation sheet (second sheet member)
32 front surface 34 rear surface 40 insole wire netting 42 front surface side connecting member 46 rear surface side connecting members 101, 102 earth retaining cage structure

Claims (4)

A cage structure for earth retaining, which is a cage made of wire mesh filled with earth and sand,
A basket formed by combining a plurality of wire mesh panels, a sheet member arranged inside at least the front surface of the basket, and earth and sand filled inside the basket,
The wire mesh panel is made of welded wire mesh,
Inside the basket and inside the sand, an insole wire mesh is arranged substantially horizontally,
The insole wire mesh is connected to the rear surface of the basket by a rear surface side connecting member, and is connected to the front surface of the basket by a front surface side connecting member,
The sheet member arranged on the front surface prevents the soil and sand from being discharged to the outside of the basket, and is divided into upper and lower parts at a position where the front surface side connecting member is attached, and a soil retaining basket structure. object.   The cage structure for earth retaining according to claim 1, wherein the sheet member arranged on the front surface is bent at its end portion side toward the inside of the cage at positions vertically divided. ..   The cage structure for earth retaining according to claim 1 or 2, wherein the front surface side connecting member is attached to the front surface so as to be movable along an iron wire extending vertically in the welding wire mesh. Step A of combining a plurality of wire mesh panels to form a basket,
A step B of arranging the first sheet member so as to cover the lower inner half of the front surface of the basket and a part of the bottom surface thereof;
Step C of putting earth and sand in the lower half of the basket,
A step D of bending the upper end of the first sheet member backward and placing it on the earth and sand;
Step E of placing an insole wire net on the earth and sand,
A step F of connecting the insole wire mesh and the front surface with a front surface side connecting member, and movably attaching the front surface side connecting member to the front surface along a vertically extending iron wire of a welded wire mesh of the wire mesh panel; ,
A step G of connecting the insole wire mesh and the rear surface of the basket with a rear surface side connecting member,
A step H of disposing a second sheet member so as to cover the inner upper half of the front surface of the basket and a part of the insole wire mesh;
And a step I of putting earth and sand into the upper half of the basket.

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