JP2022019139A - Basket unit and civil engineering structure - Google Patents

Abstract

To provide a basket unit and a civil engineering structure which facilitate installation and have good construction efficiency, and have high integrality of a structure for a filling material continuous in a height direction.SOLUTION: A basket unit 1 is formed of an integral structure such that a plurality of square cylindrical cells 10 extending in a height direction are aligned in a width direction, in which the plurality of square cylindrical cells 10 are obtained by mutually connecting a plurality of wire mesh panels 11 with a plurality of connection members 12, and the square cylindrical cells 10 have a filling space S communicating the inside in the height direction. A civil engineering structure A includes a basket unit 1 whose back face is laid down on the front face of an inclined surface or erected on the front face of the inclined surface, and a filler A2 that is made to fill the inside of a filling space of the basket unit 1.SELECTED DRAWING: Figure 1

Description

The present invention relates to a cage unit and a civil engineering structure, and more particularly to a cage unit and a civil engineering structure, which are easy to install, have good construction efficiency, and have high structural integrity because the filling material is continuous in the height direction.

Civil engineering structures made by stacking cages will be installed for the purpose of retaining soil on slopes and revetments. Patent Documents 1 to 3 disclose a civil engineering structure constructed by filling a futon basket installed on the front surface of a slope with a stone material and stacking the stones in a staircase pattern.
With these technologies, a series of operations such as assembling the futon basin, installing the quilt basin on the front of the slope, filling the inside of the quilt basin with stone, backfilling the back of the quilt basin, and rolling the stone and backfill soil are performed step by step. By doing this and stacking this in steps from the bottom to the top, a civil engineering structure is constructed.

Japanese Unexamined Patent Publication No. 11-93133 Japanese Unexamined Patent Publication No. 2002-155519 Japanese Unexamined Patent Publication No. 2016-84608

The prior art has the following drawbacks.
<1> Since a series of operations from assembling the futon cage to rolling compaction is repeated step by step, the construction efficiency is poor.
<2> The structure is such that the futon baskets are piled up, and the upper and lower stones are trimmed by the bottom net, so the structure lacks unity.
<3> When the front surface is slanted, it is necessary to individually design the front surface of the futon basket according to the slope of the slope. Therefore, the versatility of the futon basket is low, and the material cost is high.
<4> Since the futon cages are stacked in a staircase pattern on the slope, it is necessary to excavate the futon cage in a staircase pattern on the slope, and at the same time, it is necessary to backfill the back surface of the futon cage, resulting in poor construction efficiency.
<5> As the stone material in the futon basket cracks or the voids decrease and sink due to aging, a gap is created between the upper part of the stone material and the bottom net of the upper stage. In order to replenish this, it is necessary to fill the depth of the futon basket with stone material for each step, which requires labor and cost for maintenance.

An object of the present invention is to provide a cage unit and a civil engineering structure that can solve the above problems.

The cage unit of the present invention has an integrated structure in which a plurality of square cylinder cells extending in the height direction are arranged side by side in the width direction, and the plurality of square cylinder cells connect a plurality of wire mesh panels to each other by a plurality of connecting members. Therefore, the square tube cell is characterized by having a filling space that communicates with the inside in the height direction.

In the cage unit of the present invention, a plurality of square cylinder cells may have a square shape in a plan view.

In the cage unit of the present invention, the connecting member may be a connecting coil wound around a vertical wire of an adjacent wire mesh panel.

In the cage unit of the present invention, a plurality of wire mesh panels may be composed of a plurality of L-shaped panels and a combination of one or a plurality of flat panels.

The civil engineering structure of the present invention is characterized by comprising a cage unit in which the back surface is leaned against the front surface of the slope, and a filling material filled in the filling space of the cage unit.

The civil engineering structure of the present invention is characterized by comprising a cage unit erected on the front surface of a slope and a filling material filled in the filling space of the cage unit.

In the civil engineering structure of the present invention, the cage unit is formed by connecting a plurality of square cylinder cells connected in parallel in the width direction in a plurality of rows in the thickness direction, and the heights of the plurality of square cylinder cells are equal in the width direction and the thickness is equal. It may increase toward the valley side of the slope in the direction, and the top ends of the plurality of square tube cells may be aligned at the same height.

The civil engineering structure of the present invention may include an anchor material cast on a slope through a wire mesh panel from within the filling space.

In the civil engineering structure of the present invention, the cage unit may not have a bottom net, and the filling material in the filling space may be directly supported on the buttock.

The cage unit of the present invention is composed of a square tube cell formed by connecting two L-shaped panels combined in a square shape in a plan view with a plurality of connecting members, and the square tube cell communicates inside in the height direction. It is characterized in that the L-shaped panel is made of a welded wire mesh, and is provided with a filling space to be filled and a bottom net that closes the lower part of the filling space.

Since the cage unit and the civil engineering structure of the present invention have the above-mentioned structure, they have at least one of the following effects.
<1> By putting the filling material from the upper part of the square tube cell into the cage unit leaning against the slope, it can be constructed at once in the height direction without repeating the work for each step. Therefore, the construction efficiency is very high.
<2> Since the filling material in the square tube cell is continuously meshed vertically, the structure is highly integrated. Therefore, for example, when used as a retaining wall, the entire civil engineering structure can resist the back earth pressure as a whole.
<3> A continuous wall surface corresponding to the slope of the slope can be constructed simply by leaning the cage unit on the slope. Therefore, it is not necessary to design individually according to the gradient, and the versatility is high.
<4> Since the back surface of the cage unit can be directly leaned against the slope, there is no extra work of excavating the slope in a staircase pattern and backfilling it again. Therefore, the construction efficiency is high.
<5> When the filling material in the square tube cell sinks, it can be replenished from the upper part of the square tube cell at any time, so that maintenance is easy.

Explanatory drawing of the civil engineering structure of this invention. Explanatory drawing of the basket unit of this invention. Explanatory drawing of the basket unit of this invention. Explanatory drawing of Example 2. FIG. Explanatory drawing of Example 3. Explanatory drawing of Example 5.

Hereinafter, the basket unit and the civil engineering structure of the present invention will be described in detail with reference to the drawings. The cage unit will be described in the description of the civil engineering structure.
The "thickness direction", "width direction", and "height direction" of the cage unit and the civil engineering structure in the present invention are the states in which the cage unit 1 erected horizontally on the ground is viewed in a plan view, that is, the state shown in FIG. In the front-back direction, the left-right direction, and the vertical direction orthogonal to these.

[Civil engineering structure]
<1> Overall configuration (Fig. 1).
The civil engineering structure A of the present invention is a structure used for civil engineering purposes such as earth retaining on slopes and revetments.
The civil engineering structure A is configured by putting the filling material A1 into the inside of the cage unit 1 leaning against the front surface of the slope.
In this example, a split chestnut stone having a size of about 40 to 150 mm is used as the filling material A1. However, the present invention is not limited to this, and crushed stones having an appropriate particle size, boulders, recycled crushed stones such as concrete and brick crushed stones, and the like can be adopted.
The civil engineering structure A may be leaned against the front surface of the slope or may be erected vertically on the front surface of the slope. In this case, as in the embodiment described later, a plurality of square cylinder cells 10 may be connected in a row in the thickness direction (FIG. 4), or an anchor material A2 may be placed on the slope to prevent the fall. desirable.

<2> Basket unit (Fig. 2).
The cage unit 1 is a unit constituting the outer shell of the civil engineering structure A.
The cage unit 1 is composed of a plurality of square cylinder cells 10 arranged side by side in the width direction.
Specifically, a plurality of square cylinder cells 10 extending in the height direction are continuous in the width direction while touching each other on the side sides, and the front surface and the back surface of the plurality of square cylinder cells 10 each form a continuous one surface. do.
In this example, the cage unit 1 is composed of a combination of five square tube cells 10 having the same height, which are partitioned by four partition walls. However, the number of square tube cells 10 is merely an example, and the number can be appropriately set according to the construction width.
In the cage unit 1 of the present invention, the wall-shaped filling structure is composed of a continuous body in the width direction by the square cylinder cell 10 to prevent the front surface of the cage unit 1 from being confined due to the internal pressure of the filling material A1. be able to.
In this example, each square tube cell 10 includes a lid net and a bottom net (not shown) that close the top and bottom.

<3> Square tube cell (Fig. 3).
The square cylinder cell 10 is a frame-shaped body (cell) having a rectangular shape in a plan view for filling the filling material A1.
The square tube cell 10 is configured by connecting a plurality of wire mesh panels 11 to each other by a plurality of connecting members 12.
In this example, each square tube cell 10 has a square shape in a plan view.
By forming the square cylinder cell 10 into a square shape in a plan view, each side evenly resists the internal pressure of the filling material A1, so that the side surface is less likely to be dented or deformed. Therefore, it is possible to hang the filling material A1 in a state where the inside of the square cylinder cell 10 is filled in the installation place.
However, the square tube cell 10 is not limited to a square shape in a plan view, and for example, the square tube cell 10 may have a rectangular shape in a plan view long in the thickness direction.
Further, the square cylinder cell 10 does not have to be integrated in the height direction, and a plurality of cylindrical bodies formed by assembling the wire mesh panel 11 are connected in the height direction by the connecting member 12 to form the square cylinder cell 10. May be good.

<3.1> Wire mesh panel.
The wire mesh panel 11 is a member for partitioning the side surface of the square tube cell 10.
In this example, the wire mesh panel 11 is composed of a combination of the L-shaped panel 11a and the flat panel 11b.
The L-shaped panel 11a exhibits a substantially L-shaped shape in a plan view, which is formed by bending a rectangular welded wire mesh at a substantially right angle at the center in the width direction.
The flat panel 11b is made of a rectangular welded wire mesh.
In this example, the width of the flat panel 11b is twice the width of the side surface of the L-shaped panel 11a.
As in this example, by combining the wire mesh panel 11 constituting the square cylinder cell 10 with the L-shaped panel 11a and the flat panel 11b, the strength of the corner portion of the square cylinder cell 10 is ensured by the L-shaped panel 11a. At the same time, the cage unit 1 can be easily assembled with a small number of members.
Further, since the same members can be stacked on the disassembled L-shaped panel 11a and the flat panel 11b, they can be stored in a small space and are convenient in terms of transportation.

<3.2> Connecting member.
The connecting member 12 is a member for connecting the wire mesh panels 11 to each other.
In this example, as the connecting member 12, a connecting coil made of a long iron wire wound in a coil shape is adopted.
By abutting the side sides of the two wire mesh panels 11 and winding a connecting coil around two adjacent vertical wires, the two wire mesh panels can be easily and surely connected.
However, the connecting member 12 is not limited to the connecting coil, and other known members such as U-bolts and shackles may be adopted.

<4> Assembling the basket unit (Fig. 3).
The basket unit 1 can be assembled, for example, by the following procedure.
In this example, an example in which five square cylinder cells 10 are composed of six L-shaped panels 11a and two flat panels 11b will be described.
First, five L-shaped panels 11a with the corners facing the upper right in a plan view are arranged in parallel in the width direction, and the end sides of the L-shaped panels 11a are connected to the corners of the adjacent L-shaped panels 11a by the connecting member 12. ..
Subsequently, the leftmost L-shaped panel 11a is combined with the L-shaped panel 11a whose corners are directed to the lower left in a plan view, and the L-shaped panel 11a is connected by the connecting member 12 to form the leftmost square cylinder cell 10.
Finally, the open portions of the four L-shaped panels 11a on the right side are closed by two flat panels 11b arranged in a plane shape and connected by the connecting member 12, to form a total of five square tube cells 10.
In this example, since the partition walls between the plurality of square tube cells 10 share one welded wire mesh in the L-shaped panel 11a, as compared with the case where the side surfaces of independent square tube-shaped wire meshes are contacted and connected, for example. There is no structural waste.

<5> Filling space.
The filling space S is a space for filling the filling material A1.
The filling space S communicates with the inside of the square tube cell 10 in the vertical direction. Therefore, the filling material A1 can be charged into the filling space S from above the square tube cell 10 at a time. Further, the filling material A1 in the civil engineering structure A is continuous in the vertical direction without the intervention of a wire mesh. The structure is highly integrated, and the filling material A1 can integrally resist the back surface earth pressure.
When the filling material A1 in the square cylinder cell 10 sinks over time, the filling material A1 is replenished at any time by removing the lid net of the square cylinder cell 10 and charging the filling material A1 from above. be able to.

[Example in which a plurality of layers of square tube cells are connected in the thickness direction]
In this example, square cylinder cells 10 arranged in parallel in the width direction are connected in the thickness direction to form a structure having two or more layers in the thickness direction (FIG. 4).
In this example, the square tube cell 10 having three layers in the thickness direction is erected vertically on the front surface of the slope.
Each square tube cell 10 of the cage unit 1 matches the height of the top end, and increases the dimension in the height direction toward the slope valley side in the thickness direction of the cage unit 1. That is, the lower end of the square cylinder cell 10 in the row on the slope valley side extends downward from the lower end of the square cylinder cell 10 in the row adjacent to the slope mountain side, and exhibits a substantially inverted right-angled triangular shape in the side view.
In this example, by selecting the height of the square tube cell 10 of each layer, the side surface shape along the slope of the slope can be configured. Therefore, the amount of excavated soil can be reduced as compared with the conventional civil engineering structure for excavating a slope with a uniform slope.
Further, for example, split chestnut stone is used for the filling material A1 in the square tube cell 10 of the front layer on the slope valley side, and cheaper crushed stone is selected for the filling material A1 in the square tube cell 10 of the second and subsequent layers. It is possible to arbitrarily combine the filling material A1 according to the application.

[Examples provided with an anchor material]
In this example, the civil engineering structure A is provided with the anchor material A2, and the cage unit 1 leaning against the slope is fixed to the slope with the anchor material A2 (FIG. 5).
The anchor material A2 in this example is a wooden pile. However, the present invention is not limited to this, and as the anchor material A2, for example, a steel pipe pile, H-shaped steel, an anchor pin, or the like may be adopted.
The anchor material A2 is installed, for example, by the following procedure.
Through holes for passing the anchor material A2 are provided on the front surface and the back surface of any square cylinder cell 10 in the cage unit 1.
Specifically, in the wire mesh panel 11 on the front surface and the back surface of the square tube cell 10, a through hole having a size capable of inserting the anchor material A2 by cutting the vertical wire material and the horizontal wire material in the portion corresponding to the insertion position of the anchor material A2. To form.
The cage unit 1 is arranged on the front surface of the slope, and the filling space S of the square cylinder cell 10 is filled with the filling material A1 up to the height of the lower part of the through hole.
Subsequently, the tip of the anchor material A2 is applied to the slope through the through hole of the square tube cell 10, and the head of the anchor material A2 is pushed into the slope by a method such as pushing the head of the anchor material A2 with a heavy machine.
After driving the anchor material A2, the filling material A1 is filled sideways and above the anchor material A2 in the filling space S.
In this example, by fixing the civil engineering structure A to the slope via the anchor material A2, it is possible to prevent the civil engineering structure A from sliding in the direction of the buttock and falling to the slope valley side.
Further, in this example, the original effect of the slope stabilization method by the anchor material A2, such as suppressing the arc slip of the slope, can be exhibited.

[Example in which the basket unit does not have a bottom net]
In this example, the cage unit 1 does not have a bottom net.
Therefore, the filling material A1 in the filling space S is directly supported on the bottom of the cage unit 1 below.
In this example, when the slope buttock flows out due to a revetment scouring or heavy rain, the filling material A1 in the filling space S sinks under its own weight and is automatically filled in the outflow portion. This can prevent the outflow of the buttocks from progressing.
Further, the filling material A1 reduced by filling the outflow portion can be replenished from above by opening the lid net of the square tube cell 10.

[Example in which the basket unit consists of a single square tube cell]
In this example, the cage unit 1 is composed of a single square cylinder cell 10.
Specifically, the two L-shaped panels 11a are combined in opposite directions, connected in a square shape in a plan view by the connecting member 12, a bottom net is installed in the lower part of the filling space S, and the connecting member 12 connects the two L-shaped panels 11a (the connecting member 12). FIG. 6).
The cage unit 1 of this example is laid out linearly along the inclination direction of the slope like a conventional cylindrical gabion, and the slope is covered with a plurality of continuously arranged cage units 1.

<Prior technology>
The conventional cylindrical gabion is delivered to the site in the form of a linearly folded body net formed by connecting rhombic wire nets in a tubular shape.
At the time of assembly, while expanding the body net from the tip side into a cylindrical shape, insert a ring inside to form a cylindrical shape, align the net lids at both ends, and twist the iron wire at the end of the cylinder to fix it. do.
At the time of filling, the filling material is manually put in from the filling stone hole from which the row wire has been removed in advance, and after the filling, an iron wire is passed around the filling stone hole and twisted to close the filling stone hole.
As described above, the cylindrical gabion requires a great deal of labor and time for assembling and filling, and the work is also difficult.
Further, since the cylindrical gabion is made of a rhombic wire mesh, it is easily deformed and cannot be lifted with the filling material filled. For this reason, assembly and filling must be performed on an unstable slope, resulting in poor workability.
Furthermore, since it has a cylindrical shape, it is essential to drive a stop pile to prevent rolling.

<Effect of this example>
The basket unit 1 of this example can be assembled only by connecting the L-shaped panel 11a and the coil of the bottom net, and can be filled by simply loading the filling material A1 from the upper part, so that the workability is very high.
Further, since the L-shaped panel 11a is made of a welded wire mesh having high rigidity and has fixed corners, side surface protrusion and deformation are unlikely to occur with respect to the internal pressure of the filling material A1. Therefore, after filling the inside of the square cylinder cell 10 with the filling material A1 on a flat ground, the filling material A1 can be suspended and installed on the slope.
In addition, since it has a square tube shape, it is highly stable after installation and does not require a stop pile to prevent rolling.

1 Basket unit 10 Square cylinder cell 11 Wire mesh panel 11a L-shaped panel 11b Flat panel 12 Connecting member S Filling space A Civil engineering structure A1 Filling material A2 Anchor material

Claims (10)

It is a cage unit that can construct a civil engineering structure having a thickness direction, a width direction, and a height direction by putting a filling material inside.
It consists of an integrated structure in which multiple square cylinder cells extending in the height direction are arranged side by side in the width direction.
The plurality of square tube cells are formed by connecting a plurality of wire mesh panels to each other by a plurality of connecting members.
The square tube cell is characterized by having a filling space that communicates with the inside in the height direction.
Basket unit. The cage unit according to claim 1, wherein the plurality of square cylinder cells have a square shape in a plan view. The cage unit according to claim 1 or 2, wherein the connecting member is a connecting coil wound around a vertical wire rod of the adjacent wire mesh panel. The cage unit according to any one of claims 1 to 3, wherein the plurality of wire mesh panels are composed of a plurality of L-shaped panels and one or a plurality of flat panels. The cage unit according to any one of claims 1 to 4, wherein the back surface is leaned against the front surface of the slope.
It is characterized by comprising a filling material filled in the filling space of the cage unit.
Civil engineering structure. The basket unit according to any one of claims 1 to 4, which is erected on the front surface of the slope, and
It is characterized by comprising a filling material filled in the filling space of the cage unit.
Civil engineering structure. The cage unit connects a plurality of square cylinder cells connected in parallel in the width direction in a plurality of rows in the thickness direction, and the heights of the plurality of square cylinder cells are equal in the width direction and are on the slope valley side in the thickness direction. The civil engineering structure according to claim 6, wherein the top ends of the plurality of square tube cells are aligned at the same height. The civil engineering structure according to any one of claims 5 to 7, further comprising an anchor material cast from the filling space through the wire mesh panel onto a slope. The civil engineering structure according to any one of claims 5 to 8, wherein the cage unit does not have a bottom net and the filling material in the filling space is directly supported on the buttock. .. It consists of a square tube cell composed of two L-shaped panels combined in a square shape in a plan view and connected by a plurality of connecting members.
The square tube cell comprises a filling space that communicates in the height direction inside, and a bottom net that closes the lower part of the filling space.
The L-shaped panel is made of a welded wire mesh.
Basket unit.

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