JP2006161408A - Ground reinforcing material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel ground reinforcing material using contents of sediment, gravel or the like instead of cobble stones, and efficiently storing the contents in a wire cage in a unique form to provide required weight and strength and to solve problems of cost as well as deformation of the wire cage and ground settlement caused by the formation of clearances. <P>SOLUTION: The contents 9 such as granular or fine granular sediment and/or gravel larger in specific gravity than water and smaller in diameter than the mesh of the wire cage 2 are stored in a flexible bag 8 with an allowance in capacity to form a weight member 3 larger in size than the mesh of the wire cage 2 and changeable in shape by the movement of the contents 9, and a plurality of weight members 3 are stored in the wire cage 2 to form the ground reinforcing material. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a ground reinforcing material used for various civil engineering works such as revetment work, residential land development work, and slope protection work.

  In various civil engineering works such as revetment work, residential land preparation work, or slope protection work, the ground reinforcement is generally a rectangular or circular iron wire fence formed of rhombus or welded wire mesh, packed with multiple chestnuts. It is used as a material and is installed where necessary for strengthening, protecting or stabilizing the ground.

  However, in the ground reinforcement material in which the chestnuts are packed in the iron wire cage as described above, a gap is formed between the adjacent chestnuts when filling the chestnuts, so that each chestnut is likely to be in an unstable state. Kuriishi moves with the passage of time, and the upper surface of the iron wire fence falls and the ground tends to sink. In addition, the above-mentioned chestnut stone, which is a natural resource, tends to decrease and is difficult to obtain, so there is also a problem that the construction cost is high.

  If earth and sand or gravel can be used instead of the above-mentioned chestnut stone, problems such as deformation of the iron wire fence and ground subsidence due to the gaps as well as cost problems can be solved. Since it has a small diameter and flows out from the mesh of the iron wire rod, it cannot be accommodated and used in the iron wire rod as it is.

  On the other hand, Patent Document 1 discloses a ground fixing material in which a plurality of bags formed by fully storing cedar chips in a net bag are packed in a zinc aluminum alloy iron wire housing. This ground fixing material has the advantage of low cost because it does not use chestnut stone, but because the bag body is a net bag filled with lightweight cedar chips, it is very lightweight and floats on water. Easy and weak in strength. For this reason, the use as a ground fixing material is limited, and it is practically difficult to install it in a place where it receives a large earth pressure or water pressure, or a place where it is exposed to water flow. Moreover, since the bag body is a net bag filled with cedar chips, the outer shape is fixed in a stretched state, and the individual bag bodies are the width of the casing. Since the ratio of the size of the bag body to the housing is large, such as being accommodated side by side in the housing, this is the case in various housings with various dimensions. It is very difficult to always fit a tight bag without any gaps

Although it is possible to use earth and sand or gravel instead of the above cedar wood chips, this can increase the weight and strength of the ground fixing material, but hard earth and sand or gravel etc. When the inside of the bag is fully filled, the shape of the bag body is further fixed, so that it becomes more difficult to fit a plurality of bag bodies into the housing without any gaps. In addition, the weight of each individual bag body is extremely increased, which may make handling difficult.
JP 2002-69972 A

  Therefore, an object of the present invention is to use a granular or fine-grained content such as earth and sand or gravel instead of chestnut stone, and to efficiently accommodate the content in a unique manner in a steel wire fence. An object of the present invention is to provide a new ground reinforcing material that has an excellent weight and strength, and that eliminates problems such as deformation of a steel wire rod due to the formation of a gap and ground subsidence, as well as cost problems.

  In order to achieve the above object, the ground reinforcing material of the present invention is composed of an iron wire rod made of a metal wire and a plurality of weight members accommodated in the iron wire rod, and the weight member is in a flexible bag. In addition, the contents such as earth and sand and / or gravel having a specific gravity larger than water and smaller in diameter than the mesh of the iron wire fence are accommodated with a sufficient capacity, thereby moving the contents. It is configured so that the shape can be changed, and the size is larger than the mesh of the iron wire rod, and is a size that can be accommodated by connecting a plurality of them in both the vertical and horizontal directions of the iron wire rod. .

  In the present invention, the iron wire rod is a rectangular rod formed of a rhombus wire mesh and / or a welded wire mesh, and the bag is a fiber bag having water permeability and air permeability.

  According to the present invention, as the weight member to be packed in the iron wire basket, because the weight member containing the contents such as earth and sand and / or gravel in a flexible bag with a margin in capacity is used, The weight members can be accommodated in the iron wire cage without any gaps by being stacked and accommodated sequentially in the iron wire cage while appropriately adjusting the shape by moving the contents. It is possible to obtain a new and useful ground reinforcement material that has an excellent weight and strength, and that eliminates the problems of deformation of the iron wire rod due to the formation of gaps and the problem of land subsidence and cost.

  In addition, it is possible to effectively use earth and sand and / or gravel that cannot normally be used as a containment in iron wire fences by putting them in a bag. It is possible to cope with it reliably. In addition, weight members of any size and weight can be obtained freely by changing the size and capacity of the bag, so weights with various sizes and weights for various types of iron wire rods. The member can be efficiently and reliably accommodated.

  Furthermore, since the above-mentioned weight members are usually stacked and installed individually, so that the soil retaining function is exhibited by utilizing the individual sizes and weights, when large earth pressure or water pressure is applied. In many cases, the soil retaining function disappears by moving apart, but in the present invention, a plurality of weight members are collectively accommodated in a steel wire fence and function as one large ground reinforcement material. Even if the individual sizes and weights of the members are small, a significantly large earth retaining function can be exhibited by the cooperative action of the plurality of weight members and the iron wire rod.

  FIG. 1 shows one typical embodiment of a ground reinforcing material 1 according to the present invention, and this ground reinforcing material 1 is configured by stacking and accommodating a plurality of weight members 3 in a steel wire rod 2. Has been.

  The iron wire rod 2 is formed in the shape of a rectangular box having a horizontal dimension larger than the vertical dimension, such as a rhombus metal mesh as shown in FIG. 2, a welded metal mesh as shown in FIG. Thus, it comprises a bottom mesh 2a, a pair of front and rear side screens 2b and 2b, a pair of left and right side screens 2c and 2c, and an upper surface mesh 2d attached as necessary.

  The rhombus wire mesh is formed by sequentially connecting a plurality of metal wires 5 bent in a flat spiral shape at the bent portion 5a, and has a rhombus mesh 5b. The welded wire mesh is formed in a grid shape by electrically welding the crossing portions of the metal wire strips 6a and 6b arranged vertically and horizontally, and has a rectangular mesh 6c. Are knitted to form a tortoiseshell shape, that is, a hexagonal mesh. The iron rod 2 is generally formed using only one of these wire meshes, but can be formed using a plurality of wire meshes in combination. For example, the bottom mesh 2a and the top mesh 2d are formed of a welded wire mesh, the front and rear and left and right side surfaces 2b and 2c are formed of a rhombus wire mesh, the front side of the side surface network 2b is formed of a welded wire mesh, The face mesh can be formed of a rhombus wire mesh. Of course, other combinations may be used.

  As can be seen from FIG. 4 (a), the weight member 3 includes earth and sand and / or gravel in a flexible bag 8 formed by weaving or knitting natural fiber or synthetic fiber yarn. The hard contents 9 having a specific gravity greater than that of water and smaller in diameter than the mesh of the iron wire rod 2 are accommodated, and the opening of the bag 8 is sealed with a sealing tool 10 such as a string or a metal fitting. It has the same structure as what is generally called “sandbag”.

  The bag 8 is a cloth bag having air permeability and water permeability, but having a fine mesh so that the contents 9 do not flow out. However, the material may be other than cloth. In addition, when the gravel having a relatively large particle size is accommodated as the content 9, a net bag shape having a slightly coarser grain than that when accommodating earth and sand having a small particle size can be used.

  On the other hand, the contents 9 are accommodated in the bag 8 with a sufficient capacity without being filled in the bag 8. In other words, the contents 9 having a slightly smaller amount than the capacity of the bag 8 are accommodated so that the contents 9 can move in the bag 8. Thereby, as illustrated in some shapes in FIGS. 4A to 4E, the weight member 3 becomes a base plate shape or a spherical shape due to the movement of the contents 9 or is partially depressed. The shape can be freely changed according to the space shape of the installation place, such as a part projecting or a part or all bent.

Moreover, the size of the weight member 3 is larger than the mesh of the iron wire rod 2 when changing to any shape, and a plurality of (preferably 2 to 4) pieces are provided in both the vertical and horizontal directions of the iron wire rod 2. It is desirable that the size is such that the weight members can be accommodated together. In this case, the adjacent weight members 3 and 3 may be continued in a partially overlapping state. As a preferable specific example of such a weight member 3, the bag 9 having a capacity of about 1000 to 10000 cm ³ contains the contents 9 (earth and sand or gravel) of about 50 to 90% of the capacity. Can be mentioned. However, the relationship between the capacity of the bag and the capacity of the contents may be other than this depending on the scale of the iron wire rod and the installation location.

  The above-mentioned weight member 3 constitutes the above-mentioned ground reinforcing material 1 by accommodating the necessary number in the iron wire rod 2. At that time, by appropriately adjusting the shape of each weight member 3 according to the space shape to be accommodated by moving the contents 9, these weight members 3 are tightly accommodated in the iron wire rod 2 without gaps. can do. In this case, it is not always necessary to forcefully change the shape of the weight member 3, and by placing the weight member 3 at a target location, the weight member 3 is automatically deformed according to the shape of the location, There are cases where it fits and stabilizes. Further, by using a weight member having a different size, such as arranging a small weight member in a gap between adjacent weight members, each weight member 3 can be accommodated more densely in the iron wire rod 2. Become.

  As shown in FIG. 5, the ground reinforcement 1 thus obtained can be installed on a slope such as a road or a riverbank, or can be installed in a built-up area, or can be installed in a general stone crust filled with chestnuts. Used in a similar manner for similar applications. In this case, since the weight member 3 is a bag 8 containing a content 9 having a specific gravity greater than that of water such as earth and sand and / or gravel, the ground reinforcing material 1 is made of earth pressure or water pressure. It has sufficient weight and strength that can withstand the same, and the cost is lower than when using chestnut stone. Further, since the weight member 3 is accommodated in the iron wire rod 2 without a gap, problems such as deformation of the iron wire rod 2 and ground subsidence due to the formation of the gap do not occur, and it is advantageous for strengthening, protecting or stabilizing the ground. Exert the effect.

  In addition, since earth and sand and / or gravel that cannot normally be used as the containment in the iron wire fence 2 can be effectively used by putting them in the bag 8, the earth and sand can be obtained even at sites where only earth and sand can be obtained. The ground reinforcing material 1 can be reliably installed by using. In addition, since the weight member 3 of any size can be obtained freely by changing the size, capacity, etc. of the bag 8, the weight member 3 of various sizes for the iron wire rod 2 of various dimensions. Can be efficiently and reliably accommodated.

  Furthermore, since the above-described weight members 3 are usually stacked and installed individually as sandbags, there are many cases where the earth retaining function is lost by moving apart when large earth pressure or water pressure is applied. As described above, the plurality of weight members 3 are collectively accommodated in the iron wire rod 2 and function as one large ground reinforcing material, so that the weight member 3 can be relatively small in size and weight. The remarkably large earth retaining function can be exhibited by the cooperative action of the plurality of weight members 3 and the iron wire rod 2.

  In the illustrated embodiment, an example in which the vertical and horizontal dimensions of the iron wire rod 2 are different from each other is shown, but the same vertical and horizontal dimensions may be used, or a cylindrical iron wire rod may be used.

It is a perspective view which shows one Example of the ground reinforcement material which concerns on this invention. It is a partial front view of a rhombus metal mesh. It is a partial front view of a welded wire mesh. (A) is a partial sectional view showing one shape example of a weight member, and (b), (c), (d), and (e) are side views showing different shape examples. It is a side cross section which shows the construction example of the ground reinforcement material which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ground reinforcement material 2 Iron wire fence 3 Weight member 8 Bag 9 Contents

Claims (2)

It is composed of an iron wire rod made of metal wire and a plurality of weight members housed in the iron wire rod,
The above-mentioned weight member accommodates contents such as earth and sand and / or gravel that have a specific gravity greater than that of water and smaller than the diameter of the iron wire fence in a flexible bag with a sufficient capacity. By doing so, the shape can be changed by moving the contents, and the size is larger than the mesh of the iron wire rod, and a plurality of the wire rods can be accommodated in both vertical and horizontal directions. Is a large size,
A ground reinforcement material characterized by that.   The iron wire rod is a rectangular rod formed of a diamond wire mesh and / or a welded wire mesh, and the bag is a fiber bag having water permeability and air permeability. The listed ground reinforcement.

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