JP2018105100A - Cloth form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cloth form having improved water permeability of a filter portion.SOLUTION: A cloth form is used as a slope protection structure, has a bag portion formed of a two-layer fabric and a filter portion formed of a plurality of one-layer fabrics formed into an island shape in the inner part of the bag portion at predetermined intervals, where in the one-layer fabrics, a warp or the warp and a weft is a twist yarn. A slope protection method includes: a step of laying the cloth form on a slope face; a step of placing mortar or concrete to the inside of the bag portion of the cloth form; and a step of washing at least the filter portion of the cloth form after solidification of the mortar or the concrete.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a fabric formwork.

In the slope protection structure, it is not necessary to lay foundation concrete or lay back-filled crushed stone, and because it can be constructed by a small number of people, it is cheaper than the conventional tension block method. Formwork methods have become popular in recent years.
This construction method is a method in which a cloth form frame comprising a bag portion prepared in advance is laid on, for example, a slope, and mortar is injected inside to harden.
In such a cloth formwork, a plurality of filter portions are provided at a predetermined interval in order to allow rainwater or the like that oozes out from the constructed slope to pass through from the inside and escape to the outside. Conventionally, the filter portion has a plain weave similar to the bag portion.

  When the mortar is poured into the cloth formwork, it is poured in a state of containing a large amount of water in order to uniformly spread the bag. Excess water exudes out of the fabric during the solidification process and is discharged, but at this time, a part of the mortar component also precipitates on the fabric. If an excess mortar component (NORO) remains in the filter part, it solidifies and closes the filter part, resulting in a decrease in water permeability. Then, there is a case where an operation of removing the mortar accumulated on the filter portion (a chipping operation) is necessary, and there is a problem that labor costs and labor costs are increased.

  For this reason, after construction, mortar components deposited on the cloth are removed by washing the entire protective structure (mat) with water. The conventional plain weave type filter section has insufficient water permeability and takes time to drain water, which hinders improvement of workability. Moreover, even after the construction, the effect of escaping rain water from the slope as described above was not sufficient.

JP 2006-037445 A

  The present invention has been made in view of the above-described conventional situation, and an object thereof is to provide a cloth formwork in which the water permeability of the filter portion is improved.

で表される織組織を有する織物からなることを特徴とする、布製型枠。
［２］
前記一層織物において、経糸が撚糸である、［１］に記載の布製型枠。
［３］
前記一層織物において、経糸および緯糸が撚糸である、［１］または［２］に記載の布製型枠。
［４］
［１］〜［３］のいずれかに記載の布製型枠を用いた法面保護構造体。
［５］
以下の工程：
（１）［１］〜［３］のいずれかに記載の布製型枠を法面に敷設する工程、
（２）前記布製型枠の袋部の内側にモルタルまたはコンクリートを打設する工程、および
（３）前記モルタルまたはコンクリートが固化した後、前記布製型枠の少なくともフィルター部を水洗いする工程、
を有することを特徴とする法面保護工法。 As a result of continuing intensive studies to achieve the above object, the present inventors have conceived that the above problems can be solved by making the woven structure of the filter part specific, and the present invention has been completed. It was.
That is, the present invention is as follows.
[1]
A cloth mold having a bag portion made of a two-layer woven fabric and a filter portion made of a plurality of single-layer woven fabrics formed in islands at predetermined intervals inside the bag portion,
The filter part has the following organization chart:

A cloth formwork comprising a woven fabric having a woven structure represented by
[2]
The cloth mold according to [1], wherein the warp is a twisted yarn in the single-layer fabric.
[3]
The cloth mold according to [1] or [2], wherein in the single-layer fabric, the warp and the weft are twisted yarns.
[4]
A slope protection structure using the cloth form according to any one of [1] to [3].
[5]
The following steps:
(1) A step of laying the cloth formwork according to any one of [1] to [3] on a slope,
(2) a step of placing mortar or concrete inside the bag portion of the cloth formwork, and (3) a step of washing at least the filter portion of the cloth formwork with water after the mortar or concrete is solidified,
A slope protection method characterized by comprising:

  ADVANTAGE OF THE INVENTION According to this invention, the cloth formwork which improved the water permeability of the filter part can be provided. As a result, drainage after washing with water is quick, and workability is improved. In addition, even after construction, the effect of escaping rain water from the slope can be sufficiently secured.

The top view which shows the example of 1 structure of the cloth formwork of this invention. Sectional drawing of a cloth formwork after placing mortar. The organization chart which shows the woven structure of the filter part produced in the Example. The organization chart which shows the woven structure of the filter part produced in the comparative example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view showing a configuration example of a cloth mold 1 according to the present invention, and FIG. 2 is a cross-sectional view of the cloth mold 1 after a mortar 11 is placed.

The cloth formwork 1 of the present embodiment includes a bag portion 2 made of a two-layer fabric 5 and a filter portion 4 made of a plurality of single-layer fabrics 9 formed in islands at predetermined intervals inside the bag portion 2. The single-layer fabric 9 is characterized by comprising a fabric having a woven structure represented by an organization chart to be described later.
In the following description, the case where the mortar 11 is filled and solidified inside the bag portion 2 will be described as an example, but the present invention is not limited to this, and for example, concrete may be filled. .

  In the cloth mold 1, the bag portion 2 is composed of a two-layer fabric 5 in which a plurality of island-shaped filter portions 4 are formed at a predetermined interval. The two-layer fabric 5 is composed of an upper layer fabric 6 and a lower layer fabric 7, and is usually obtained by weaving with a bag weave. A mortar 11 or the like is placed in the gap between the two-layer fabric 5. The cloth mold 1 is laid with the upper fabric 6 side as the upper side (front side).

As shown in FIG. 2, the lower layer cloth 7 and the upper layer cloth 6 are connected to each other in an island shape with a predetermined interval. That is, the warp and the weft constituting the lower layer fabric 7 and the upper layer fabric 6 are partially woven as a single layer fabric 9 to form the filter unit 4.
As shown in FIG. 1, the filter portions 4 are provided in an island shape on the two-layer fabric 5 and are arranged at specific intervals. There is no restriction | limiting in particular in the magnitude | size, the number, and arrangement | positioning of the filter part 4, Although it selects suitably according to a construction site etc., the one where a space | interval with a narrow space | interval can obtain a more planar placing surface. For example, in FIG. 1, the filter units 4 are arranged in parallel in the vertical and horizontal directions, but the present invention is not limited to this.
The bag portion 2 is provided with an inlet (not shown), from which a mortar 11 or the like is placed in a gap formed by the upper layer fabric 6 and the lower layer fabric 7 of the bag portion 2.
As will be described later, the bag portion 2 forms a plurality of island-shaped single layer fabrics 9 at a predetermined interval when weaving a two-layer fabric 5 composed of an upper layer fabric 6 and a lower layer fabric 7 using warps and wefts. Is obtained. As shown in FIG. 1, the single-layer fabrics 9 are arranged, for example, in the vertical and horizontal directions. The upper layer fabric 6 and the lower layer fabric 7 are made of plain weave, for example.

で表される織組織を有する平織の織物からなる。この平織は経糸を２本交互に用いた二重袋織である。 In the cloth form 1 of the present embodiment, the two-layer fabric 5 constituting the bag portion 2 is not particularly limited, but for example, the following organization chart:

It consists of the plain-woven fabric which has the woven structure represented by these. This plain weave is a double bag weave using two warps alternately.

  In the organization chart shown in this specification, the black portion indicates the portion where the warp is above (floating), and the white portion indicates the portion where the warp is below.

で表される織組織を有する織物からなることを特徴とする。組織図から、上下に黒が連続した部分があることがわかる。すなわち、この部分では、経糸が上下にわたって拘束されていない（浮いている）ことで、織物の網目が広がりやすくなり、その結果、フィルター部分４の透水性が向上するものと考えられる。 And in the cloth formwork 1 of this embodiment, the single layer fabric 9 which comprises the filter part 4 is the following organization charts:

It consists of the woven fabric which has the woven structure represented by these. From the organization chart, it can be seen that there are black continuous parts above and below. That is, in this portion, the warp is not restrained in the vertical direction (floating), so that the mesh of the woven fabric tends to spread, and as a result, the water permeability of the filter portion 4 is considered to be improved.

で表される織組織を有する。 Although the boundary area between the double-layer fabric 5 and the single-layer fabric 9 that transitions from the double bag weave to the single weave is not particularly limited, for example, the following organization chart:

It has the woven structure represented by these.

By making the filter part 4 into a woven structure as described above, the water permeability can be improved as compared with a conventional filter part constituted by a plain weave.
In the single layer fabric 9 constituting the filter unit 4, for example, the warp is a twisted yarn. Furthermore, the weft is preferably a twisted yarn. Thereby, the clearance gap between the threads which comprise the filter part 4 spreads, and water permeability can be improved more.

Moreover, the cloth mold 1 of this embodiment also has a herbicidal effect. That is, since the woven structure of the filter part 4 is appropriately densely configured while ensuring good water permeability, it prevents the grass from growing from below through the filter part 4 of the cloth mold 1. Is done. Furthermore, even if grass seeds land on the cloth form 1, the grass roots are also prevented from falling under the filter.
The cloth mold 1 of the present embodiment has no change in durability and herbicidal properties as compared with the conventional cloth mold 1 and has a water permeability coefficient of about twice as shown in Examples described later. In addition, weaving costs are almost the same as before.

Such a cloth mold 1 is manufactured as follows, for example.
The bag portion 2 forms a plurality of island-shaped single-layer fabrics 9 at predetermined intervals when weaving a two-layer fabric 5 composed of an upper layer fabric 6 and a lower layer fabric 7 woven with warps and wefts. Can be obtained. The upper layer fabric 6 and the lower layer fabric 7 are formed of, for example, a plain weave having a woven structure represented by [Chemical Formula 2] described above. The single-layer fabric 9 is formed of a fabric having a woven structure represented by the above [Chemical Formula 3]. The boundary area between the two-layer fabric and the one-layer fabric 9 has, for example, a woven structure represented by the above [Chemical Formula 4].

There is no restriction | limiting in particular in the thread | yarn raw material used for the bag part 2, For example, nylon 6, nylon 66, polyamide, polyester, vinylon, a polypropylene, a polyvinylidene chloride etc. are used. The thickness and density of the yarn are selected within a range in which the strength of the bag portion 2 at the time of placing and the surplus water of the slurry after placing can be squeezed out. For example, the thickness of the yarn is 400 to 3300 dtex ( The range of dtex) and the yarn density are selected in the range of 40 to 7 yarns / inch (16 to 27 yarns / cm) for both warp and weft yarns. The filter part 4 and the bag part 2 may be comprised from the same thread | yarn raw material, and the thread | yarn whose fineness is higher than others can also be arrange | positioned only as the boundary area | region of the filter part 4 and the bag part 2. FIG.
The warp and weft may be the same material and color, or may be different materials and colors. In addition, it is preferable to use the thread | yarn which shows substantially the same characteristic for both the warp and the weft in the high elongation of the thread. This is to make the expansion deformation of the bag portion 2 substantially the same when placing. In general, the fabric strength of the bag portion 2 can be obtained at the site of placing the fabric by carrying out fabric design and production control with a lower limit of 150 kg / 3 cm width.

The upper layer fabric 6, the lower layer fabric 7 and the filter unit 4 can be woven by a rapier loom incorporating an electronic jacquard device or other known looms such as dobby, tappet, mechanical jacquard, jet loom and the like.
In addition, when the mortar 11 is poured into the cloth mold 1, the cloth mold 1 is somewhat shrunk, and the size of the cloth mold 1 (bag part 2) is designed in consideration of this shrinkage.

Next, a slope protection method using the cloth mold 1 of the present invention will be described.
The slope protection method of the present invention is a slope protection method using the cloth mold 1 described above, and includes the following steps:
(1) laying the cloth formwork 1 on the slope,
(2) a step of placing a mortar (or concrete) 11 inside the bag portion 2 of the cloth mold 1; and
(3) After the mortar (or concrete) 11 is solidified, there is a step of washing at least the filter part of the cloth mold 1 with water.
Details will be described below.

(1) The cloth formwork 1 is laid on the slope.
First, the cloth formwork 1 is laid on the slope with the upper cloth 6 side as the upper side (front side).
Before laying the cloth formwork 1 on the slope, it is preferable to form the slope at the construction site. In the case of bank slope, for example, in the case of a bank, cutting or embankment is performed based on the plan cross-sectional view to eliminate the unevenness of the ground and to remove trees, grass, roots and the like.
In addition, when the slope to be protected is larger than a certain level, a plurality of units of cloth mold 1 of a predetermined size are prepared and transported to the construction site. The fabric formwork 1 may be formed by appropriately combining the units of the formwork 1 to match the size and shape of the slope at the construction site.
While aligning, for example, a single pipe for suspension is placed at the top of the slope, and the cloth form 1 is suspended on the slope by a predetermined method such as hanging the single pipe through the cloth form 1. Lay and fix.

(2) The mortar 11 is placed inside the bag portion 2 of the cloth form 1.
After the laying step, fluid (unsolidified) mortar 11 is injected between the upper layer fabric 6 and the lower layer fabric 7. Thereafter, the site is maintained until the mortar 11 injected into the cloth form 1 is solidified, and the mortar 11 is solidified by performing management of temperature and waterproofing necessary for solidification.

(3) After the mortar 11 is solidified, at least the filter part of the cloth mold 1 is washed with water.
Excess water contained in the mortar 11 is discharged through the cloth of the cloth mold 1 in the solidification process. After the mortar 11 is solidified, at least the filter part, for example, the entire protective structure (mat) is washed with water. At this time, in the cloth form 1 of the present embodiment, the filter unit 4 has the woven structure as described above, so that drainage is good and workability is improved. Moreover, the necessity for the chipping work after construction can be reduced, and the labor cost can be reduced. In addition, in the protective structure after construction, the effect of escaping rain water from the slope can be sufficiently obtained.

In the following examples, in order to confirm the effect of the present invention, filter parts were produced by changing the woven structure, and the water permeability was evaluated.
Example 1
A filter part having a woven structure represented by the above-described structure chart was produced. The filter part has a substantially square shape with a side of 3 cm. The overall woven structure including the periphery of the filter portion is shown in FIG.
Polyester was used as the yarn material, the yarn thickness was 1100 dtex, the yarn weaving density was 44 warps / inch and 41 wefts / inch. The warp was a twisted yarn, and the weft was an untwisted yarn.

(Example 2)
A filter portion having a woven structure shown in FIG. 3 was produced in the same manner as in Example 1 except that twisted yarn was used as the weft in addition to the warp.

(Comparative example)
A filter part having a conventional plain weave structure was produced. The filter part has a substantially square shape with a side of 3 cm. The overall woven structure including the periphery of the filter portion is shown in FIG.
Polyester was used as the yarn material, the yarn thickness was 1100 dtex, the yarn weaving density was 44 warps / inch and 41 wefts / inch. The warp was a twisted yarn, and the weft was an untwisted yarn.

The water permeability was measured for the filter parts of Examples 1 and 2 and the comparative example. The water permeability coefficient was measured in accordance with JIS A 1218.
as a result:
Hydraulic conductivity of Example 1: 5.54 × 10 ⁻² cm / s
Hydraulic conductivity of Example 2: 1.37 × 10 ⁻¹ cm / s
Water permeability coefficient of comparative example: 2.61 × 10 ⁻² cm / s
Met.

  As is clear from comparison between the comparative example and Example 1, the water permeability of the filter portion is improved by about twice as compared with the comparative example of the plain weave structure by making the woven structure of the filter portion as shown in FIG. You can see that Further, as apparent from a comparison between Example 1 and Example 2, it can be seen that the water permeability is further improved by about twice when the weft is also a twisted yarn in addition to the warp.

Next, the drainage properties of the filter portions of Examples 1 and 2 and the comparative example were evaluated. Confirmation of drainage was performed as follows. That is, after the cloth formwork mat was washed with water, the time until the water in the filter part was drained and disappeared was measured.
As a result, in the filter parts of the cloth molds of Examples 1 and 2, draining was completed in about 30 seconds after washing, whereas in the filter part of the cloth molds of Comparative Examples, about 1 minute passed after washing. However, drainage did not end and water remained.
From the above results, it was confirmed that the fabric mold of the example had a higher water permeability coefficient of the filter part and good drainage than the cloth mold of the comparative example. Thereby, in the cloth formwork of this invention, it is guessed that it is hard to accumulate.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this, and can be appropriately changed without departing from the spirit of the invention.

  By using the cloth formwork according to the present invention, drainage is good and can be widely used as a slope protection structure.

1: Cloth formwork 2: Bag part 4: Filter part 5: Two-layer fabric 6: Upper layer fabric 7: Lower layer fabric 9: One-layer fabric 11: Mortar

Claims (5)

A cloth mold having a bag portion made of a two-layer woven fabric and a filter portion made of a plurality of single-layer woven fabrics formed in islands at predetermined intervals inside the bag portion,
The filter part has the following organization chart:

A cloth formwork comprising a woven fabric having a woven structure represented by   The fabric form according to claim 1, wherein in the single-layer fabric, the warp is a twisted yarn.   The cloth mold according to claim 1 or 2, wherein in the single-layer fabric, the warp and the weft are twisted yarns.   A slope protection structure using the cloth mold according to any one of claims 1 to 3. The following steps:
(1) The process of laying the cloth formwork according to any one of claims 1 to 3 on a slope,
(2) a step of placing mortar or concrete inside the bag portion of the cloth formwork, and (3) a step of washing at least the filter portion of the cloth formwork after the mortar or concrete is solidified,
A slope protection method characterized by comprising:

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