JP2006037507A - Stone-filled gabion and partition panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inexpensively provide a stone-filled gabion having sufficient strength. <P>SOLUTION: A front reinforcing bar material 35 is arranged between the upper edge 32 and the lower edge 31 on a front panel 3 of the stone-filled gabion. This front reinforcing bar material 35 is parallel to the upper edge 32 and the lower edge 31, and both ends are welded to the side edges 33 and 33. A rhombic wire net 8 is stretched over the front panel 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a stone custody and a partition panel.

  For ground reinforcement work such as earth retaining work and landslide prevention work, flood control work such as revetment squeeze work and channel construction, etc. Many have been used. As a method for easily and inexpensively manufacturing a casket for filling these stones, there is a method for manufacturing a casket by assembling panels. In this method, a rectangular or trapezoidal frame made of steel bars called main bars are joined together to form a box by joining a plurality of panels with wire meshes. Cover the top to make a stone bowl.

  Fig. 1 shows an example of earth retaining work. On the mountain slope on the right side of the road 102, a stone cave 103 having a rectangular cross section is stacked in three stages to form a earth retaining wall 101. The upper pallet 103 is shifted to the right side of the lower pallet 103 and is stacked in a staircase shape so that the whole is along the slope. On the other hand, on the slope on the left side of the valley side, a stone clog 104 having a trapezoidal cross section and having a hypotenuse along the slope is stacked in three stages to form the earth retaining wall 101. A road 102 is formed on a ground 105 sandwiched between these two earth retainings 101. Note that 131 is a packed stone.

  The entire surface of the back panel 107 of the stone crabs 103 and 104 is in contact with the natural ground 106 on the slope side, but the front panel 108 facing the back panel 107 is generally exposed. For this reason, there have been problems such as the front panel 108 expanding and deforming to the outside or the main bar buckling deformation due to the earth pressure from the back side and the pressure from above when the ridges are stacked in multiple stages.

  In order to solve this problem, an inner frame made of steel bars is conventionally placed inside the stone bowl, the back panel and front panel are connected by the inner frame, and the vertical bar of the inner frame is joined to the front panel. However, in order to prevent expansion deformation of the front panel, it is necessary to use a large number of inner frames, and when using a large number of such inner frames, when putting a stone in the cage with a shovel car or the like, The work efficiency has deteriorated due to the fact that the inner frame is in the way and the bucket does not enter the cage.

  Therefore, a method of increasing the diameter of the steel bar of the frame constituting the panel and a method of providing a vertical reinforcing bar on the frame of the rectangular front panel (connecting the upper side and the lower side of the frame) are performed. .

Further, for reinforcing the front panel, Patent Document 1 discloses a technique for coupling a reinforcing member having bars vertically and horizontally on the outer surface side of the front panel.
JP 2002-302955 A

  However, in the method of increasing the diameter of the steel bar of the frame or providing the reinforcing bar in the vertical direction, the stone claw becomes heavy and the work efficiency is deteriorated and the cost is increased.

  In addition, the technique described in Patent Document 1 requires time and labor for connecting the reinforcing member to the stone candy, and the work efficiency is deteriorated and the cost is increased.

  Furthermore, so far, the panel specifications to prevent the expansion and deformation of the stone-clad panel, such as the diameter of the steel bar and the size of the frame, have been determined empirically. Has never been verified. However, recently, there has been a demand for supplying low-cost and sufficiently strong stone candy, and scientific support has been required for the panel specifications.

  This invention is made | formed in view of this point, The place made into the objective is to provide the stone custody which has sufficient intensity | strength at low cost.

  The stone cradle of the present invention is a stone cradle constructed by joining a plurality of wire mesh panels each having a diamond wire mesh attached to a frame made of bar material, the wire mesh panel comprising at least a bottom panel, a front panel, and a back surface. The front panel has a trapezoidal or rectangular frame whose upper side and lower side are parallel, and the frame of the front panel includes the upper side and the lower side between the upper side and the lower side. The front reinforcing bar is provided substantially in parallel, and both ends of the front reinforcing bar are fixed to both sides of the frame of the front panel.

  It is preferable that the diameters of the frame and the front reinforcing bar are set so that the buckling strength of the front panel is not less than a predetermined strength by calculation of the frame strength.

  The front reinforcing bar preferably extends in a spiral shape formed by one row line of the rhombus wire mesh.

  The back panel has a trapezoidal or rectangular frame in which an upper side and a lower side are parallel, and the frame of the back panel is provided with a back reinforcement provided substantially parallel to the upper side and the lower side between the upper side and the lower side. Preferably, both ends of the back reinforcing bar are fixed to both sides of the frame of the back panel.

  The side panel has a trapezoidal or rectangular frame in which an upper side and a lower side are parallel, and the frame of the side panel is provided with a side reinforcement provided substantially parallel to the upper side and the lower side between the upper side and the lower side. It is preferable that both ends of the side reinforcing bar are fixed to both sides of the frame of the side panel.

  A partition panel according to the present invention is a partition panel arranged inside a stone claw formed by joining a plurality of wire mesh panels with a diamond wire mesh attached to a frame made of bar material, and the upper side and the lower side are parallel to each other. A trapezoidal or rectangular frame made of a bar material, and at least a part of the frame is stretched with a rhombus wire mesh, and the frame of the partition panel includes the upper side and the lower side between the upper side and the lower side. A partition panel reinforcing bar provided substantially parallel to the lower side is provided, and both ends of the partition panel reinforcing bar are fixed to both sides of the frame of the side panel.

  The frame of the partition panel is a trapezoidal frame in which an upper side and a lower side are parallel, and has a vertical bar that connects the upper side and the lower side in the vicinity of the oblique side of the frame and is substantially perpendicular to the upper side and the lower side. And it is preferable that a rhombus metal mesh is stretched on a rectangular mesh frame including the upper side, the lower side and the vertical bar.

  In the present invention, since a horizontal reinforcing bar is provided on the frame of the front panel, the buckling strength is greatly improved as compared with the case without this reinforcing bar, and the strength of the stone claw is greatly reduced at a low cost. Can be raised. Further, in the present invention related to the partition panel, since the horizontal reinforcing bar is provided on the frame of the partition panel, the strength of the partition panel can be greatly improved, and the strength of the partition panel can be greatly improved at low cost. it can.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
The stone claw according to the first embodiment is a rectangular parallelepiped ridge formed by combining six rectangular wire mesh panels.

  FIG. 2 is a schematic perspective view of the assembled stone bowl 1. This stone packed bowl 1 includes a bottom panel 2, a front panel 3, a back panel 6, side panels 4 and 4, and a top panel 5. The front panel 3 and the back panel 6 are panels having the same structure, and the bottom panel 2 and the top panel 5 are panels having the same structure. Although the structure of the front panel 3 will be described in detail later, the structure of each of the panels 2, 3, 4, 5, and 6 is simply described. A rectangular frame is formed by a metal bar, and column lines are arranged on the frame. It has a wire mesh. In addition, reinforcing longitudinal bars for reinforcement are connected to two long sides (upper side and lower side) in the horizontal middle part of the frame. The connection between the panels 2, 3, 4, and 5 is performed by connecting and fixing the metal rods of the frame to each other using the connecting tools 7, 7,. In FIG. 2, the connectors 7, 7,. Inside this stone-packed pot 1 is filled with cracked stones, cobblestones, crushed concrete and earth and sand.

  FIG. 3 shows the structure of the front panel 3. The front panel 3 has a rectangular frame having an upper side 32 and a lower side 31 made of steel bars as long sides and two side sides 33 and 33 made of steel bars as short sides, and a plurality of rows are arranged in this frame. A diamond wire mesh 8 consisting of a line 9 is stretched. The upper side 32 and the side sides 33 and 33 and the lower side 31 and the side sides 33 and 33 are connected by welding. Each row line 9 of the rhombus metal mesh 8 has its end portions wound around and fixed to the side sides 33, 33, and is arranged in parallel with the upper side 32 and the lower side 31, which are long sides.

  Here, as shown in FIGS. 4 and 5, the rhombus wire mesh 8 is prepared by preparing a plurality of column lines 9 each having a wire zigzag and a plurality of zigzag peaks of one column line 9. A wire net that is formed by combining the column lines 9 by being hooked on a plurality of zigzag valleys of the column line 9, and the mesh is a diamond-shaped wire mesh. The zigzag of the column line 9 is formed in a spiral shape in the direction in which the column line 9 extends so that the crests and valleys of the two column lines 9 are well caught and form a net.

  Further, for reinforcement of the panel, three reinforcing vertical bars 34 are provided at equal intervals between the two side edges 33, 33 in parallel with the side edges 33, 33. The reinforcing vertical bars 34 and the upper side 32 and the lower side 31 are connected and fixed by welding.

  Further, the front panel 3 is provided with a front reinforcing bar 35 made of a steel bar at an intermediate position between the upper side 32 and the lower side 31 and substantially parallel thereto. The front reinforcing bar 35 is welded and fixed to the sides 33 and 33, and the reinforcing vertical bars 34 are also fixed by welding. Further, as shown in FIG. 5, the front reinforcing bar 35 passes through the rhombus 8 so as to sew the zigzag of the row line 9, and this is exactly the same as the front reinforcing bar 35 of the row line 9. In this state, the front reinforcing bar 35 extends in the spiral shape formed by the row lines 9. By doing so, the front reinforcing bar 35 and the wire mesh 8 cooperate to improve the strength of the front panel 3.

  The front panel 3 having the above-described structure is subjected to a force from above and a force from the inside. The force from above is due to the load of another stone claw 1 stacked on the stone claw 1 and the vertical load of earth pressure, which may cause the frame of the panel to buckle. There is. Further, the force from the inside is a force by which stones or the like inside the ridges push the panel to the outside due to earth pressure from the back, and the frame may be bent when this force acts on the frame via the diamond wire mesh 8. There is. In general, a wire mesh panel often buckles with an upward force that is smaller than an internal force that causes the frame to bend. Therefore, it is necessary to design the structure of the front panel 3 to have sufficient buckling strength. is there.

  As a result of various studies, the inventors have found that the buckling strength of the wire mesh panel can be calculated and evaluated by the following formula (1).

P = EI (nπ / l) ² + k (l / nπ) ² (N / m) (1)
E: flexural rigidity of frame part, k: spring constant of wire mesh, I: secondary moment of cross section l: distance between two adjacent horizontal bars, n: value determining branching mode of buckling = 1, 2 or 3
E is a value determined by the material of the bar, I is determined by the diameter of the bar, and k is a value determined by the wire diameter of the wire mesh and the zigzag shape of the row line.

  Using formula (1), the buckling strength of the front panel 3 in FIG. 3 and the buckling strength of the panel that has been changed such as increasing the diameter of the steel bar or increasing the reinforcing vertical bars without using the front reinforcing bar. Table 1 shows. The horizontal length of the panel (the length of the upper side and the lower side) is 4 m, and the height of the panel (the distance between the upper side and the lower side) is 1 m.

  In the conventional type, the frame and the three reinforcing vertical bars are all steel bars having a diameter of 13 mm, and there is no front reinforcing bar. Reinforcement A type is a panel in which the frame and the three reinforcing vertical bars are all 16 mm diameter steel bars and have no front reinforcing bars (that is, a conventional type steel bar having a larger diameter). Reinforcement B type is a panel in which the frame and the reinforcing vertical bars are all steel bars with a diameter of 13 mm, there is no front reinforcing bar, and there are seven reinforcing vertical bars at a 50 cm pitch (that is, the reinforcing vertical bars are increased to the conventional type) thing). The panel of Embodiment 1 is a panel in which the frame and the reinforcing vertical bars are all steel bars with a diameter of 13 mm, and the front reinforcing bar with a diameter of 13 mm is 50 cm from the lower side (that is, the front reinforcing bar is a conventional type). Plus). For all panels, a 150 mm diamond wire mesh using an 8 mm diameter wire is used.

  Further, the strength ratio represents a relative value when the buckling strength of the panel of Embodiment 1 is 1, and the weight ratio represents a relative value when the weight of the panel of Embodiment 1 is 1. .

  As can be seen from Table 1, even if the reinforcing longitudinal bars are increased in order to resist the force from above and the installation pitch of the vertical bars is halved (reinforced B type), the strength ratio is 0.4 to 0.00. 52 and only 1.3 times the conventional type. The weight increase at this time is 1.13 times. When the diameter of the bar is 13 to 16 mm (reinforcement A type), the strength is 1.77 times that of the conventional type and the weight is 1.19 times. However, surprisingly, just adding a horizontal front reinforcing bar to the conventional type (Embodiment 1), the strength is significantly increased by 2.5 times compared to the conventional type, and the weight is a small increase of 1.13 times. It becomes.

  Conventionally, in order to improve the buckling strength, it has been considered only to increase the number of reinforcing vertical bars or increase the rod diameter in order to oppose the force from above. However, the inventors of the present application are the first to calculate the buckling strength of the wire mesh panel by calculating the frame strength, thereby increasing the number of reinforcing vertical bars and increasing the bar diameter without increasing the horizontal reinforcing bar. It was found for the first time that a significant increase in strength can be achieved by providing the. Further, it has been conventionally considered that it is difficult to sew a horizontal bar in the spiral shape formed by the row line so as to sew the wire line of the wire mesh. From the above, there was no idea of providing horizontal reinforcing bars, but by adjusting the zigzag pitch (eyes) of the column lines, the bars extend through the spiral shape formed by the column lines. It became possible to do.

  By using the frame strength calculation in this way, it is possible to achieve a significant increase in buckling strength with the addition of a minimum amount of reinforcement (that is, a minimum weight increase and material cost increase), and the appropriateness that does not result in overspec It is possible to create stone pots with high strength. Specifically, since the buckling strength is greatly improved by adding a horizontal reinforcing bar to the rectangular frame, the frame and the reinforcing bar are made to satisfy the required buckling strength (predetermined strength). The diameter is set by calculating the strength of the frame. Here, the diameter of the material steel bar was 13 mm. Construction costs can be minimized by creating stone jars of appropriate strength that do not become overspec.

  In the present embodiment, the back panel 6 is provided with a horizontal back reinforcing bar similarly to the front panel 3, and the side panels 4 and 4 are also provided with a horizontal side reinforcing bar. Therefore, the buckling strength of the back panel 6 and the side panels 4 and 4 is greatly improved. Since the back panel 6 is in contact with the rear earth wall, the force of the inner stone pushing the panel outward may be balanced with the force of the earth wall pushing back, and may be set to a lower strength than the front panel 3 As for the buckling strength, it is considered that the same strength as that of the front panel 3 is necessary, and thus it is preferable in terms of cost to provide the back reinforcing bar. In the back panel 6 and the side panels 4 and 4, the diameters of the bars and the reinforcing bars constituting the frame are set so as to be equal to or greater than a predetermined strength by calculation of the frame strength.

  In the present embodiment, the reinforcing vertical bars 34, the front reinforcing bar 35, the back reinforcing bar, and the side reinforcing bar are fixed by welding, but other fixing methods, for example, two U-bolts and two You may fix by the fixing method using two flat plates provided with one through-hole.

(Embodiment 2)
As shown in FIG. 6, the stone claw according to the second embodiment is a stone claw 11 in which the side panel 14 is trapezoidal and the other panels are rectangular. The stone claw 11 has the same shape as the stone clog 104 provided below the road 102 in FIG. 1, and the front panel 13 is a slope with a slope. In FIG. 6, the connector is very schematically illustrated with some components omitted.

  Thus, even when the front panel 13 has an inclined surface, the frame strength was calculated. As a result, by providing the horizontal front reinforcing bar 35, the buckling strength was significantly increased as in the first embodiment. The trapezoidal side panel 14 also has a substantially improved buckling strength by providing the horizontal side reinforcing bar 45 in the same manner. Similarly, the back panel is provided with a horizontal back reinforcing bar. The diameters of these reinforcing bars and the bars constituting the frame of the panel are set so as to be equal to or greater than a predetermined strength by calculation of the frame strength.

  The stone packed bowl 11 of this embodiment further has a partition panel 61 shown in FIG. The partition panel 61 has a frame made of the same trapezoidal bar as the side panel 14. Then, inside the stone claw 11, the oblique side 56 of the partition panel 61 is on the reinforcing vertical bar 34 of the front panel 13, the upper side 52 of the partition panel 61 is on the reinforcing vertical bar 24 of the top panel, and the partition panel 61 side. The side 53 is adjacent to the reinforcing vertical bars of the back panel and the lower side 51 of the partition panel 61 is adjacent to the reinforcing vertical bars of the bottom panel, and the sides of the partition panel 61 and the reinforcing vertical bars of the panels are adjacent to each other. Are fixed with U bolts. By being fixed in this way, the partition panel 61 supports the front panel 13, the top panel, and the back panel, can improve the buckling strength of the front panel 13 and the back panel, and can increase the strength against the horizontal load. Improve.

  The partition panel 61 of this embodiment is demonstrated compared with the conventional partition panel 60 shown in FIG.

  The conventional partition panel 60 has a trapezoidal frame made of steel bar with a rhombus wire mesh, and a reinforcing vertical streak 54 provided substantially between the oblique side 56 and the side side 53. Both ends of the reinforcing longitudinal bars 54 are welded to the upper side 52 and the lower side 51. On the other hand, the partition panel 61 of the present embodiment has a vertical frame line 58 (vertical bar) in the vicinity of the hypotenuse 56 and substantially perpendicular to the upper side 52 and the lower side 51 in a trapezoidal frame made of steel bar. The rhombus metal mesh 8 is stretched on a rectangular mesh frame formed by the upper side 52, the lower side 51, the side side 53, and the vertical frame line 58. Both ends of the vertical frame line 58 are welded to the upper side 52 and the lower side 51, respectively. Then, the partition panel 61 of the present embodiment connects the side side 53 and the oblique side 56 between the upper side 52 and the lower side 51, and has a partition panel reinforcing bar 55 that is substantially horizontal to the upper side 52 and the lower side 51. . Both ends of the partition panel reinforcing bar 55 are welded to the side 53 and the oblique side 56, respectively. The partition panel reinforcing bar 55 is welded to the reinforcing vertical bars 54 and the vertical frame bars 58. And the partition panel reinforcement bar | burr 55 is extended in the spiral shape which the row line 9 forms.

  Thus, since the partition panel 61 of this embodiment has the partition panel reinforcement bar | burr 55, a buckling strength improves compared with the conventional partition panel 60, and the intensity | strength which opposes a horizontal load also improves. ing. The diameter of the bar which comprises the frame of the partition panel 61 of this embodiment, and the partition panel reinforcement bar 55 is set so that it may become more than predetermined intensity | strength by frame strength calculation.

  The stone claw 11 of the present embodiment is also provided with a vertical frame line 58 and a rhombus metal mesh 8 is stretched on a rectangular frame. Since there is no curled part (entangled part) of the wire, the attachment position of the connecting bracket can be freely selected. Further, since the wire mesh 8 is not stretched near the hypotenuse 56, the work of filling stones near the connecting portion between the front panel 13 and the partition panel 61 (particularly the portion close to the bottom panel) is facilitated. In order to exert these effects, the distance L between the hypotenuse 56 and the vertical frame line 58 on the upper side 52 is preferably 1 cm or more and 20 cm or less, but L may be 0 cm.

  The embodiments described so far are examples of the present invention, and the present invention is not limited to these embodiments. In the above embodiment, horizontal reinforcing bars are installed on all of the front panel, the side panel, and the rear panel, but at least if the reinforcing bars are installed on the front panel, the reinforcing bars are provided on the other panels. There is no problem.

  The front panel and the rear panel may be a trapezoidal frame having a horizontal upper side and a lower side and a diamond wire mesh stretched.

  In addition, by making the lower side of the front panel common as the long side of the bottom panel, the front panel and the bottom panel may be integrated, or similarly, the back panel and the bottom panel may be integrated. Further, the side panel and the bottom panel may be integrated.

  In the second embodiment, the side panel is a trapezoid having only one hypotenuse, but may be a trapezoid having two hypotenuses. In this case, the back panel may be exposed and serve as a front panel.

  The size of each panel is not particularly limited. For example, the front panel of the first embodiment is 4 m × 1 m, but the width may be shorter than 4 m or longer than 4 m. The height may be shorter than 1 m or longer than 1 m. The number of reinforcing vertical bars and the installation position are not particularly limited. Also, two or more horizontal reinforcing bars may be installed. Furthermore, the connection between each side and the connection fixing method with the reinforcing bar are not limited to welding. The panel frame may be formed by bending a steel bar.

  It is preferable that each bar or rhombus wire net is subjected to rust prevention. Examples of the rust preventive process include galvanization.

  In Embodiment 1, a partition panel may be placed in the stone bowl. At this time, the partition panel may be a panel in which a wire mesh is stretched on a rectangular frame, or may be a frame without a wire mesh. Moreover, it is preferable to install a horizontal partition panel reinforcement bar in a rectangular frame.

  The top panel may not be provided, and the bottom panel of the upper jar may be used also as the upper panel of the lower jar when the stone jars are stacked in layers.

  As described above, the stone crabs according to the present invention have greatly increased buckling strength at low cost, and are useful for ground reinforcement, flood control work, and the like.

It is a typical sectional view of the earth retaining work site using a stone cradle. FIG. 3 is a perspective view of a stone packed bowl according to Embodiment 1. It is a figure which shows the front panel which concerns on Embodiment 1. FIG. It is a figure which shows a column line. It is a figure which shows a row line and a reinforcing bar. It is a perspective view of the stone custody concerning Embodiment 2. FIG. It is a figure which shows the conventional partition panel. It is a figure which shows the partition panel which concerns on Embodiment 2. FIG.

Explanation of symbols

1, 11, 103, 104 Ishizume 2 Bottom panel 3, 13, 108 Front panel 4, 14 Side panel 5 Top panel 6 Rear panel 8 Diamond wire mesh 9 Column 31 Front panel lower side 32 Front panel upper side 33 Front panel Side bar 35 Front reinforcing bar 45 Side reinforcing bar 51 Lower side 52 of partition panel Upper side 53 of partition panel Side 55 of partition panel Partition panel reinforcing bar 56 Diagonal side 58 of partition panel Vertical frame 61 Partition panel

Claims (7)

A stone claw made up of a plurality of wire mesh panels with a diamond wire mesh attached to a frame made of bar material,
The wire mesh panel includes at least a bottom panel, a front panel, a back panel, and a side panel,
The front panel has a trapezoidal or rectangular frame whose upper side and lower side are parallel,
The frame of the front panel has a front reinforcing bar provided substantially parallel to the upper side and the lower side between the upper side and the lower side,
Both ends of the front reinforcing bar are fixed to both sides of the frame of the front panel.   The stone claw according to claim 1, wherein the diameter of the frame and the front reinforcing bar is set so that the buckling strength of the front panel is not less than a predetermined strength by calculating the strength of the frame.   The said front reinforcement bar | burr is a stone cradle of Claim 1 or 2 extended in the spiral shape which one row line of the said rhombus metal mesh forms. The back panel has a trapezoidal or rectangular frame whose upper side and lower side are parallel,
The frame of the back panel has a back reinforcing bar provided substantially parallel to the upper side and the lower side between the upper side and the lower side,
The both ends of the said back reinforcement bar | burr are stone crabs as described in any one of Claim 1 to 3 currently fixed to the both sides of the said frame of the said back panel. The side panel has a trapezoidal or rectangular frame whose upper side and lower side are parallel,
The frame of the side panel has a side reinforcing bar provided substantially parallel to the upper side and the lower side between the upper side and the lower side,
The both ends of the said side reinforcement bar | burr are stone crabs as described in any one of Claim 1 to 4 currently fixed to the both sides of the said frame of the said side panel. A partition panel arranged inside a stone custody formed by joining a plurality of wire mesh panels with a diamond wire mesh attached to a frame made of bar material,
It has a trapezoidal or rectangular frame whose upper side and lower side are parallel and is made of a bar, and a rhombus wire mesh is stretched on at least a part of the frame,
The frame of the partition panel has a partition panel reinforcing bar provided approximately parallel to the upper side and the lower side between the upper side and the lower side,
Both ends of the partition panel reinforcing bar are fixed to both sides of the frame of the side panel. The frame of the partition panel is a trapezoidal frame having an upper side and a lower side parallel to each other, and has a vertical bar that connects the upper side and the lower side in the vicinity of the oblique side of the frame and is substantially perpendicular to the upper side and the lower side. And
The partition panel according to claim 6, wherein a rhombus wire mesh is stretched on a rectangular mesh frame including the upper side, the lower side, and the vertical bar.

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