JP7075602B2 - Civil engineering structure and construction method of civil engineering structure - Google Patents

Description

The present invention relates to a civil engineering structure and a method for constructing a civil engineering structure, and in particular, a method for constructing a civil engineering structure and a civil engineering structure having high workability, having both design / construction freedom and structural continuity. Regarding the law .

Civil engineering structures made by stacking futon baskets will be installed for the purpose of retaining soil on slopes and revetments. Patent Document 1 discloses a civil engineering structure constructed by putting a filling material into a rectangular parallelepiped futon basket continuously arranged along the front surface of a slope and stacking the filling material in a staircase pattern. However, when the civil engineering structure consisting of a rectangular parallelepiped futon cage is continuously arranged along a curved slope, a gap is generated on the front side or the back side.
On the other hand, Patent Document 2 discloses a plan-view trapezoidal futon cage that bends the arrangement of civil engineering structures along a slope by arranging them in the gaps between the rectangular parallelepiped futon cages. In such a futon basket, it is necessary to individually design the internal angle and width according to the curvature of the slope, which increases the cost and makes it impossible to finely adjust the internal angle and extension on site.
On the other hand, Patent Document 3 discloses a civil engineering structure in which cylindrical futon cages are continuously arranged and fastened and fixed by a plurality of binding chains from the outside of the arrangement of the futon cages. According to this structure, it is possible to arrange the futon baskets along a curved slope depending on the connecting direction of the futon baskets.

Japanese Unexamined Patent Publication No. 2011-69078 Japanese Unexamined Patent Publication No. 2012-21321 JP-A-2015-193998

The conventional civil engineering structure consisting of a cylindrical futon cage lacks the unity of the structure because the futon cage is in contact with the side surface in a dot pattern, and the contact part of the futon cage is a structural weak part. ..
If the entire futon basket is tightened from the outside with a binding chain, the futon baskets can be temporarily tied together, but since the filling material is stone, the stone material inside the futon basket will move closer to the void over time. , The futon basket becomes thin, and the binding chain loosens and comes off in the long run.
As described above, the civil engineering structure consisting of a rectangular futon cage cannot be arranged along a curved slope, while the civil engineering structure consisting of a cylindrical futon cage can be arranged along a curved slope. , There is a problem of lack of structural integrity.
Further, all of the civil engineering structures have a problem that the extension cannot be adjusted because the adjacent futon cages are connected to each other on the side surface.

An object of the present invention is to provide a civil engineering structure, a method for constructing a civil engineering structure, and a cylindrical cage that can solve the above problems.

The civil engineering structure of the present invention includes a plurality of cylindrical cages continuously arranged on an installation surface, a filler filled inside the cylindrical cage, and a connecting means for connecting two adjacent cylindrical cages, and is adjacent to each other. The two cylindrical cages are characterized in that they share a polymerized portion formed by partially polymerizing the outer periphery of each other.

In the civil engineering structure of the present invention, the connecting means may be a member arranged in the polymerization section.

In the civil engineering structure of the present invention, the connecting means may be a bag-shaped or tubular sheet arranged in the polymerization section and cast-in-place concrete filled inside the bag-shaped or tubular sheet.

The civil engineering structure of the present invention may be a bag-shaped or tubular sheet arranged in a cylindrical cage and cast-in-place concrete filled inside the bag-shaped or tubular sheet.

In the civil engineering structure of the present invention, a plurality of cylindrical cages may be stacked one above the other.

The method for constructing a civil engineering structure of the present invention includes an arrangement step of continuously arranging a plurality of cylindrical cages on an installation surface, a connecting step of connecting two adjacent cylindrical cages by a connecting means, and filling inside the cylindrical cage. It comprises a filling step of filling a body, and two adjacent cylindrical cages share a polymerized portion formed by partially polymerizing the outer periphery of each other.

In the method for constructing a civil engineering structure of the present invention, the connecting step includes a step of arranging a bag-shaped or tubular sheet in a layered portion and a step of placing concrete inside the bag-shaped or tubular sheet. In preparation, the filling step may be performed after the concrete is hardened.

The cylindrical cage of the present invention is composed of a welded wire mesh in which a plurality of horizontal wires and a plurality of vertical wires are combined, and a vertical wire rod corresponding to a part of the arrangement pitch of the vertical wire rods at at least one place on the outer circumference of the cylindrical cage. It is equipped with an insertion window that is missing, and by abutting the insertion windows of two adjacent cylindrical cages, the passage of horizontal wire rods into the insertion windows is allowed, and the outer circumference of the two adjacent cylindrical cages is partially covered. It is characterized in that it is configured to be polymerizable.

The cylindrical basket of the present invention may be formed by integrally connecting two semi-cylindrical split baskets with a plurality of connecting materials.

The cylindrical basket of the present invention includes a loop end formed by folding back the end portion of the horizontal wire rod, and the connecting member is a plurality of pin members, and the loop ends of the two split cages combined in a cylindrical shape are connected to each other. The two split cages may be connected by polymerizing and inserting the pin member inside the loop end.

Since the civil engineering structure, the method for constructing the civil engineering structure, and the cylindrical cage of the present invention have the above configurations, they have at least one of the following effects.
<1> Since the adjacent cylindrical cages share the polymerized portion and the filler and the connecting means are integrally connected via the cylindrical cages, the structure is highly integrated.
<2> The extension direction can be freely changed by selecting the installation direction of the insertion window. In addition, the extension can be easily adjusted by arbitrarily setting the lap length of the cylindrical cage. Since these adjustments can be easily performed on-site, the degree of freedom in design and construction is extremely high.
<3> Civil engineering structures can be constructed simply by assembling a cylindrical cage at the construction site and placing concrete inside, so construction efficiency is high.

Explanatory drawing of the civil engineering structure of this invention. Explanatory drawing of the cylindrical basket of this invention. Explanatory drawing of the split basket and the connecting material. Explanatory drawing of connecting material. Explanatory drawing (1) of the construction method of the civil engineering structure of this invention. Explanatory drawing (2) of the construction method of the civil engineering structure of this invention. Explanatory drawing (3) of the construction method of the civil engineering structure of this invention.

Hereinafter, the civil engineering structure of the present invention, the method for constructing the civil engineering structure, and the cylindrical cage will be described in detail with reference to the drawings. The cylindrical basket will be described in the description of the civil engineering structure. Further, in the present invention, "concrete" is used in the sense of including mortar.

[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. In this example, an example in which the civil engineering structure A is used as a retaining wall for retaining soil arranged on the front surface of the slope will be described.
The civil engineering structure A includes at least a plurality of cylindrical cages 1 continuously arranged on the installation surface, a filler A1 filled inside the cylindrical cage 1, and a connecting means A2 for connecting the adjacent cylindrical cages 1 to each other. ..
The civil engineering structure A has one feature in the lap connection structure of the cylindrical cage 1 in which the outer periphery of the adjacent cylindrical cage 1 is partially polymerized to form the polymerization portion R.
In this example, the civil engineering structure A has a two-tiered upper and lower structure, and the rows of the upper cylindrical cage 1 are arranged so as to be offset from the lower cylindrical cage 1 to the slope side according to the slope of the slope. However, the civil engineering structure A is not limited to this, and may have one stage or three or more stages. Further, a straight wall structure in which the upper and lower cylindrical cages 1 are stacked in the vertical direction may be used.

<2> Cylindrical basket (Fig. 2).
The cylindrical basket 1 is a member having the function of a formwork of the filler A1 and the connecting means A2.
In this example, the cylindrical basket 1 is composed of a combination of two divided baskets 10 and a plurality of connecting members 20. Specifically, two split cages 10 combined in a cylindrical shape are integrally connected by a plurality of connecting materials to form a cylindrical cage 1.
By combining the cylindrical basket 1 with the divided baskets 10, the divided baskets 10 can be stored and transported in a stacked state, so that the space can be effectively used and the transport efficiency is improved (FIG. 3).

<2.1> Split basket (Fig. 3).
The split cage 10 is a member that is combined to form the cylindrical cage 1.
The split cage 10 is composed of a semi-cylindrical welded wire mesh in which a plurality of arch-shaped horizontal wire rods 11 and a plurality of linear vertical wire rods 12 are combined.
At least one of the two divided cages 10 is provided with an insertion window 13 in which a part of the vertical wire rod 12 is missing. Here, the "deficiency" of the vertical wire rod 12 includes not installing the vertical wire rod 12 from the beginning of manufacture, but also cutting the installed vertical wire rod 12 near the intersection with the horizontal wire rod 11 at a site or the like.
In this example, loop ends 12a are formed on both sides of the split cage 10.

<2.1.1> Insertion window (Fig. 2).
The insertion window 13 is a notch for polymerizing the adjacent cylindrical cage 1.
The insertion window 13 is formed by missing the vertical wire rod 12 corresponding to a part of the arrangement pitch of the vertical wire rod 12. That is, the missing portion of the vertical wire rod 12 between the uniform arrangement pitches of the vertical wire rod 12 is not the insertion window 13 of the present invention.
Of the plurality of cylindrical cages 1 in series, the two outer cylindrical cages 1 need only have the insertion window 13 inside to be connected to the other cylindrical cages 1. The cylindrical cage 1 other than the outer cylindrical cage 1 needs to be provided with insertion windows 13 on both sides.
By abutting the insertion windows 13 of two adjacent cylindrical cages 1, the horizontal wire rod 11 of the other cylindrical cage 1 can be passed into the insertion window 13 to partially polymerize the outer periphery of the two cylindrical cages 1. can.
The civil engineering structure A of the present invention has a structure in which the filler A1 and the connecting means A2 are mainly regarded as a skeleton, and the cylindrical cage 1 mainly functions as a discard form. Therefore, even if the cylindrical cage 1 is provided with the insertion window 13 which is a defective portion, it does not become a structural weak point.

<2.1.2> Loop end (Fig. 4).
The loop end 11a is a connecting element for connecting the two split cages 10 in combination with the connecting member 20 described later.
The loop end 11a is configured by folding both ends of the horizontal wire rod 11 into a hook shape. Specifically, both ends of each horizontal wire rod 11 constituting the split cage 10 are folded inward, and these are vertically connected by the vertical wire rod 12.
By configuring the loop end 11a inward instead of outward, when the filler A1 described later is filled, the tip of the loop end 11a is crushed in the direction of closing the loop by the internal pressure of the filler A1, so that the loop It is possible to prevent the connecting member 20 from being detached due to the deformation of the end 11a and the cylindrical cage 1 from being disassembled due to this.

<2.2> Connecting material (Fig. 4).
The connecting member 20 is a member for connecting the two split cages 10.
In this example, a long pin member is used as the connecting member 20.
The length of the connecting member 20 corresponds to the height of the cylindrical cage 1, and the head of the connecting member 20 is folded downward like a hook.
Two split cages 10 are combined in a cylindrical shape, and the connecting material 20 is inserted inside the loop end 11a in a state where the loop ends 11a are overlapped with each other to easily and reliably connect the two split cages 10. Can be done.
The connecting material 20 is not limited to the pin member, and for example, a coiled iron wire may be used. Specifically, the vertical wire rods 12 at the ends of the two split cages 10 facing each other in a cylindrical shape are butted against each other, and the coiled iron wire is wound around the split cages 10 to connect the split cages 10.
In this case, it is not necessary to provide the loop end 12a in the split cage 10.

<3> Filler.
The filler A1 is a member that is filled in the cylindrical cage 1 to form the skeleton of the civil engineering structure A.
In this example, as the filler A1, a combination of a cloth formwork A1a arranged inside the cylindrical basket 1 and a concrete A1b cast inside the cloth formwork A1a is adopted.
The cloth formwork A1a of this example is made of a bag body in which a non-woven fabric is sewn into a bottomed shape. However, the material of the bag body may be a woven fabric, a knitted fabric, a felt, a resin sheet or the like instead of the non-woven fabric.
The dimensions of the cloth formwork A1a correspond to the width and height of the cylindrical basket 1.
By placing concrete A1b in the cloth formwork A1a and hardening the concrete A1b, the concrete A1b in the cloth formwork A1a, the concrete A1b soaked into the cloth of the cloth formwork A1a, and the side surface of the cloth formwork A1a. The iron wire of the cylindrical cage 1 that bites into the concrete and the concrete A2b that has penetrated into the cloth of the cloth formwork A2a of the connecting means A2 described later are integrated.
The filler A1 is not limited to the cloth formwork A1a, and a general civil engineering sheet may be used in the form of a bag or a cylinder. For example, if the viscosity of the concrete A1b is sufficiently high, a civil engineering sheet is arranged in a cylindrical shape inside the cylindrical basket 1, and the concrete A1b is placed inside the cylindrical cage 1 so that the concrete A1b does not leak into the cylinder. Can be retained.

<4> Connecting means.
The connecting means A2 is a means for connecting adjacent cylindrical cages 1 to each other.
In this example, as the connecting means A2, a combination of a cloth formwork A2a arranged inside the polymerization portion R and a concrete A2b cast inside the cloth formwork A2a is adopted.
The dimensions of the cloth formwork A2a correspond to the width and height of the layered portion R.
Other configurations of the cloth formwork A2a and the concrete A2b in the connecting means A2 are the same as those of the cloth formwork A1a and the concrete A1b in the filler A1 described above, and are not described in detail here.

<5> Construction method of civil engineering structure.
The civil engineering structure A of the present invention can be constructed by, for example, the following series of procedures including an assembly process, an arrangement process, a connection process, a filling process, and a stacking process.

<5.1> Assembly process.
Assemble a predetermined number of cylindrical cages 1. Specifically, the split cages 10 are integrally connected by assembling a pair of split cages 10 in a cylindrical shape, overlapping the loop ends 12a, and inserting the connecting member 20 inside the loop ends 12a.
In the civil engineering structure A of this example, since the filler A1 is composed of a combination of a cloth formwork A1a and a concrete A1b, it is not necessary to provide a lid net and a bottom net on the cylindrical cage 1.
Therefore, there is no need for complicated work of coiling the circumference of the lid net or the like to the edge of the cylindrical cage 1, and the workability is high.

<5.2> Arrangement step (FIG. 5).
The assembled cylindrical basket 1 is continuously arranged along the slope. At this time, the horizontal wire rods 11 of the adjacent cylindrical cages 1 are mutually inserted into the insertion window 13 to form a polymerization portion R in which the cylindrical cages 1 are partially wrapped.
The cylindrical basket 1 may be directly assembled at the installation location without separating the assembly process and the arrangement process.
In the civil engineering structure A of the present invention, the vertical wire rod 12 of the cylindrical cage 1 can be cut at an arbitrary position to change the direction of the insertion window 13 and set the connecting direction of the cylindrical cage 1 in the field.
Further, by selecting the number of cuts of the vertical wire rod 12, the width of the polymerization portion R can be changed and the extension of the cylindrical cage 1 can be freely adjusted on site.

<5.3> Connecting process (FIG. 6).
The adjacent cylindrical cages 1 are connected to each other by the connecting means A2. Specifically, a cloth formwork A2a having an open mouth is installed inside the polymerization portion R shared by the two cylindrical baskets 1, and concrete A2b is placed inside the cloth formwork A2a.
By placing the concrete A2b, the cloth formwork A2a swells outward and pushes the polymerized portion R to the limit.
After placing the concrete A2b, the bag mouth of the cloth formwork A2a is folded on the liquid surface of the concrete A2b. As a result, the uncured concrete A2b permeates into the cloth of the bag mouth and is integrated with the concrete A2b.
By hardening the concrete A2b, the polymerized portion R is fixed in a state of being fully open, and the cylindrical cages 1 are firmly connected to each other.

<5.4> Filling step (FIG. 7).
The inside of the cylindrical cage 1 is filled with the filler A1. Specifically, a cloth formwork A1a having an open mouth is installed inside the cylindrical basket 1, and concrete A1b is placed inside the cloth formwork A1a.
After casting, the bag mouth of the cloth formwork A1a is folded onto the liquid surface of the concrete A1b and integrated in the same manner as in the connecting step.
By filling the concrete A1b, the cloth formwork A1a swells outward and pushes the cylindrical basket 1 outward.
At the same time, the side surface of the cloth formwork A1a of the filler A1 was pressed against the side surface of the cloth formwork A2a of the connecting means A2 with the iron wire of the cylindrical cage 1 sandwiched between them, and bleeded into the cloth of the cloth formwork A1a of the filler A1. By hardening the concrete A1b, a civil engineering structure A in which the filler A1, the connecting means A2, and the cylindrical formwork 1 are integrally connected is constructed.

<5.5> Stacking process.
When the civil engineering structure A has a multi-stage laminated structure, the back surface of the lower civil engineering structure A is backfilled as necessary, and the procedure of <5.1> to <5.4> described above is performed in the lower stage. The upper civil engineering structure A is piled up above the civil engineering structure A of.

[Example of using stone or the like for the filler and the connecting means]
In the first embodiment, the filler A1 and the connecting means A2 are each a combination of a cloth formwork and concrete, but the present invention is not limited to this.
In this example, a split chestnut stone having a size of about 40 to 150 mm is used as the filler A1 and the connecting means A2. In addition, crushed stone, boulder, concrete glass, brick glass, etc. having a particle size corresponding to the mesh size of the cylindrical cage 1 may be used.
Also in this example, as in the case of the first embodiment, the connecting means A2 is first put into the polymerization section R by the connecting step, the cylindrical cages 1 are connected to each other (connecting step), and then the filler A1 is put into the cylindrical cage 1. (Filling process).
A lid net or a bottom net may be installed on the cylindrical cage 1 as needed. Further, the vertical wire rods 12 of the polymerization portion R may be integrally fixed to each other with a coil-shaped wire rod to reinforce the connection of the cylindrical cage 1.
Further, one of the filler A1 and the connecting means A2 may be a combination of a cloth formwork and concrete, and the other may be a stone material or the like.

1 Cylindrical cage 10 Divided cage 11 Horizontal wire 11a Loop end 12 Vertical wire 13 Insertion window 20 Connecting material A Civil engineering structure A1 Filler A1a Cloth formwork A1b Concrete A2 Connecting means A2a Cloth formwork A2b Concrete R

Claims (5)

Multiple cylindrical baskets erected continuously on the installation surface,
The filler filled inside the cylindrical basket and
It is provided with a connecting means for connecting two adjacent cylindrical cages to each other.
The two adjacent cylindrical cages share a polymerized portion formed by partially polymerizing the outer periphery of each other.
The connecting means is a member arranged in the polymerization section.
The filler is a bag-shaped or tubular sheet arranged in the cylindrical basket and cast-in-place concrete filled inside the bag-shaped or tubular sheet.
It is characterized in that the adjacent cylindrical cage is pressed against the connecting means and fixed by the internal pressure of the filler in the cylindrical cage .
Civil engineering structure. The first aspect of the present invention, wherein the connecting means is a bag-shaped or tubular sheet arranged in the polymerized portion and cast-in-place concrete filled inside the bag-shaped or tubular sheet. Civil engineering structure. The civil engineering structure according to claim 1 or 2 , wherein the plurality of cylindrical cages are stacked one above the other in a plurality of stages. An arrangement process in which multiple cylindrical baskets are continuously erected on the installation surface,
A connecting step of connecting two adjacent cylindrical cages with a connecting means,
A filling step of filling the inside of the cylindrical cage with a filler is provided.
The two adjacent cylindrical cages share a polymerized portion formed by partially polymerizing the outer periphery of each other.
The connecting means is a member arranged in the polymerization section.
The filler is a bag-shaped or tubular sheet arranged in the cylindrical basket and cast-in-place concrete filled inside the bag-shaped or tubular sheet.
The filling step is characterized in that the adjacent cylindrical cage is pressed against the connecting means and fixed by the internal pressure of the filler in the cylindrical cage .
How to build a civil engineering structure. The connecting step includes a step of arranging a bag-shaped or tubular sheet in the superposed portion and a step of placing concrete inside the bag-shaped or tubular sheet, and after the concrete is hardened, the said step. The method for constructing a civil engineering structure according to claim 4 , wherein the filling step is performed.

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