JP2009068185A - Fiber-based or resin-based geogrid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-quality fiber-based or resin-based geogrid which makes manufacturing costs low, and which prevents the occurrence of unevenness in sewing and the production of a defective product. <P>SOLUTION: In this fiber-based or resin-based geogrid (net-like sheet for civil engineering) 10, a net portion 10a of loose texture is woven in such a manner that coating makes crossing portions of warp and weft connected together by making the warp and the weft cross each other, and concurrently with that, a side reinforcing band 10b at the side edge of the net portion and a connecting hole 11 in the side reinforcing band 10b are formed. Concurrently with the weaving of the net portion 10a, a central longitudinal reinforcing band 10c is formed in the center of the net portion 10a, and a central lateral reinforcing band 10d is formed in the center of the net portion. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fiber-based or resin-based geogrid, and particularly to a fiber-based or resin-based geogrid that can be used as a net-like sheet body for civil engineering having a structure that can be easily connected to each other.

  In addition, a geogrid is a lattice made of a synthetic resin, in which intersecting portions of a lattice structure made of a synthetic resin are combined or integrated, and a fiber-based geogrid and a resin-based geogrid 2 There are types. A fiber-based geogrid is made by weaving high-strength fibers such as aramid fibers and polyester fibers to form a lattice structure, coating it with a synthetic resin such as polyethylene, vinyl chloride or acrylic, and connecting and integrating the intersections of the lattices. It is. The resin-based geogrid is formed by regularly perforating a thick synthetic resin sheet made of polyethylene, polypropylene, or the like, and stretching the perforated sheet vertically and horizontally.

Conventionally, as shown in FIGS. 14 to 16, a net-like sheet body 100 made of a fiber-based or resin-based geogrid in which a band 110 having a connecting hole 111 is sewn on a side edge portion is used, and the sheet is used. In a state where the body 100 is adjacent to each other, each sheet body can be connected by inserting a rope between the adjacent connection holes 111 in each sheet body 100 or engaging an appropriate connection tool between the connection holes 111. It connects (patent documents 1-4).
Japanese Patent Laid-Open No. 9-316849 JP 2000-110809 A JP 2000-213509 A Utility Model Registration No. 3091540

  However, in the case of the sheet body 100 as described above, the belt body 110 having the connection hole 111 must be separately sewn or bonded to the side edge portion of the fiber-based or resin-based geogrid. Costs such as cost were generated, and there was a disadvantage that the cost was inevitably high. In addition, there is a drawback in that it takes time and effort to quality control against human error during sewing or bonding of the belt body 110, and further, the sewing thread in which the belt body 110 is sewn by ultraviolet rays is deteriorated, and the side edge portion is deteriorated. Could break.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a fiber-based or resin-based geogrid with improved manufacturing quality and low manufacturing costs.

  The fiber-based or resin-based geogrid according to the present invention includes a surrounding reinforcing band and an inner net part, and the reinforcing band is formed integrally with the formation of the net part. Is.

  In addition to the above configuration, the fiber-based or resin-based geogrid according to the present invention is formed integrally with the formation of the net part in the longitudinal direction and / or the horizontal direction of the net part at an appropriate interval. It is good also as a structure characterized by having the reinforced band made.

  Further, the fiber-based or resin-based geogrid according to the present invention is composed of a high-density mesh whose finer mesh is finer than the mesh of the net part in addition to the above-described configuration, and the high-density mesh is coated with a synthetic resin. It is good also as a structure characterized by adhere | attaching the grid cross | intersection part of this high-density mesh.

  For example, in the case of a fiber-based geogrid, the net part is woven by crossing warp and weft so that the eyes become coarse, and the reinforcing band is woven by crossing warp and weft so that the eyes become fine, and these warp and weft Are formed by bonding the intersections of the two layers with a coating. In the case of the resin-based geogrid, when drilling the synthetic resin sheet before stretching, a large number of holes are opened in the part that becomes the net part after stretching, and a small number of holes are drilled in the part that becomes the reinforcing zone, It is created by stretching this vertically and horizontally and coating a reinforcing zone.

  Furthermore, the fiber-based or resin-based geogrid according to the present invention may have a configuration in which a reinforcing band is formed by laminating a synthetic resin film in addition to the above-described configuration.

  In addition to the above configuration, the fiber-based or resin-based geogrid according to the present invention forms a connection hole by arranging warps and wefts in the reinforcing band, or reinforces the connection hole by punching or sewing. It is good also as a structure characterized by forming simultaneously with band formation. In this case, the sewing means that a hole such as a button hole is formed by sewing.

  According to the fiber-based or resin-based geogrid of the present invention, it is not necessary to separately sew and form a band having a connecting hole as in the prior art, and it does not take time to sew or bond the band. Therefore, manufacturing cost can be reduced. In addition, when reinforcing bands are provided at an appropriate interval in the longitudinal direction of the net part, the strength against longitudinal pulling is increased, and when reinforcing bands are provided at an appropriate interval in the lateral direction of the net part. Has an advantage that the strength against the tensile force in the lateral direction is increased, and the strength of the entire fiber-based or resin-based geogrid is increased. Furthermore, if a hole for connection is provided in either one or both of the reinforcing band provided at an appropriate interval in the horizontal direction or the reinforcing band provided at an appropriate interval in the vertical direction, that is, one geogrid This is convenient because the reinforcement band on the side of the first and the reinforcement band of the net part of the other geogrid can be connected, and an arrangement configuration corresponding to the installation area of the geogrid can be made. In addition, if one of the geogrids is cut at the location of the reinforcing band of the net part and is connected to the reinforcing band around the other geogrid, the width can be adjusted without producing two overlapping parts. The geogrid can be laid in a flat state without any gaps, and the amount of geogrid used can be minimized. Moreover, since the central longitudinal reinforcing band, the central lateral reinforcing band, and the connecting holes formed in these reinforcing bands can be formed simultaneously with the formation of the net portion by weaving or the like, the manufacturing efficiency is high. There is an advantage that leads to cost reduction. In addition, since there is no human error caused by sewing or bonding the belt as in the past, there is no need for quality control and no sewing thread is used to sew the belt. There is an advantage that the reinforcing bands are not broken by ultraviolet deterioration of the yarn.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In addition, in Examples 1-3, although the case where the fiber type | system | group or resin-type geogrid of this invention is implemented as a net-like sheet | seat body for civil engineering is demonstrated, this invention is not limited by this.

  1 is a front view of a net-like sheet body for civil engineering according to a first embodiment, FIG. 2 is a partially enlarged perspective view of the net-like sheet body for civil engineering according to the first embodiment, and FIG. 3 is a net shape for civil engineering according to the first embodiment. 4 is a partially enlarged end view of the sheet body, and FIG. 4 is a front view showing a use state of the net-like sheet body for civil engineering according to the first embodiment.

  1 to 3, reference numeral 10 denotes a civil engineering net-like sheet according to the present embodiment, in which warps and wefts are crossed inside to form a coarse net portion 10 a (eye size of about 5 mm to 150 mm). At the periphery of the civil engineering net-like sheet 10, fine side reinforcement bands 10 b (mesh size 3 mm or less) are formed by crossing warps and wefts. The civil engineering net-like sheet 10 has a rectangular shape with a width of about 2 m and a length of about 4 m to 50 m, and in the case of a long length, it is wound and stored and transported.

  The side reinforcing band 10b is formed with a connecting hole 11 such as a button hole (the size of the hole is about 15 mm at the maximum). This connection hole 11 is used for connecting adjacent civil engineering net-like sheets 10 when a plurality of civil engineering net-like sheets 10 are arranged adjacent to each other as shown in FIG. The rope A is inserted through 11 or an appropriate connecting tool is used to connect adjacent net-like sheets 10 for civil engineering. Therefore, it is preferable that the connecting hole 11 is configured not to be broken even when a force of at least 0.5 kN to 10 kN is applied per hole. In addition, although FIG. 4 showed the usage example which connects the net-like sheet | seat 10 for civil engineering right and left, it cannot be overemphasized that it can connect also up and down.

  A fine central longitudinal reinforcing band 10c is formed in the central longitudinal direction of the net portion 10a of the net-like sheet 10 for civil engineering, that is, at a location about 1 m from both sides. By comprising in this way, the intensity | strength with respect to the tension | pulling of a vertical direction becomes high. Further, a fine central lateral reinforcing band 10d is formed in the central horizontal direction of the net portion 10a of the net-like sheet 10 for civil engineering, that is, at a location of about 2 m from both the upper and lower sides. By comprising in this way, the intensity | strength with respect to the tension | pulling of a horizontal direction becomes high. Therefore, the net-like sheet 10 for civil engineering according to Example 1 has a strong tensile strength as a whole. In this embodiment, the reinforcing bands are added in the central vertical direction and the central horizontal direction. However, the present invention is not limited to this, and the reinforcing bands may be provided at appropriate intervals in the vertical direction or the horizontal direction. Good.

  The net portion 10a, the side reinforcing band 10b, the connecting hole 11, the central longitudinal reinforcing band 10c and the central lateral reinforcing band 10d are designed to be woven at the same time. Coat the intersections to fix the overall shape of the sheet. By simultaneously weaving the connecting holes 11 in this way, it is not necessary to sew or bond the belt body having the connecting holes, which has been conventionally performed, and the quality control for human error. A quality product can be provided at a reduced manufacturing cost.

  The side reinforcing band 10b, the connecting hole 11, the central vertical reinforcing band 10c, and the central horizontal reinforcing band 10d may be configured by laminating a synthetic resin film on a coarse mesh part. May be formed, and a synthetic resin film may be laminated on the portion.

  FIG. 5 is a surface view of the net-like sheet body for civil engineering according to the second embodiment, FIG. 6 is a surface view showing a use state of the net-like sheet body for civil engineering according to the second embodiment, and FIG. 7 is for civil engineering according to the second embodiment. It is an end view in the use condition of a net-like sheet object.

  The civil engineering net-like sheet 20 of the second embodiment is the same as the civil engineering net-like sheet 10 of the first embodiment. Simultaneously weaving connection holes 21 such as button holes in the central longitudinal reinforcing band 10c and the central lateral reinforcing band 10d. Is formed. Therefore, portions similar to those in the first embodiment are denoted by the same reference numerals as those in the first embodiment while using the description of the first embodiment.

  The civil engineering net-like sheet 20 of the second embodiment can be used as shown in FIG. 5 in addition to the usage shown in FIG. 4 for the civil engineering net-like sheet 10 of the first embodiment. That is, as shown in FIGS. 6 and 7, the side reinforcing band 10b of one civil engineering net-like sheet 20 and the central longitudinal reinforcing band 10c of the other civil engineering net-like sheet 20 are overlapped to form the side reinforcing band 10b. If the connecting hole 11 and the connecting hole 21 of the central longitudinal reinforcing band 10c are connected using the rope A or an appropriate connecting tool, the civil engineering net-like sheet 20 is connected.

  Constructing the civil engineering net-like sheet 20 in this way is convenient because it can cope with the installation area of the sheet by combining the use state shown in FIG. 4 and the use state shown in FIG. In addition, in the use state shown in FIG. 6 and FIG. 7, there is an advantage that a portion where the net portion 10a overlaps is formed, and that portion becomes strong.

  8 is a front view of the civil engineering net-like sheet body according to the third embodiment, FIG. 9 is a front view showing a half-cut state of the civil engineering net-like sheet body, and FIG. 10 is a civil engineering work according to the third embodiment. It is a surface view which shows the state which connected the net-like sheet | seat with the other net-like sheet | seat for civil engineering.

  The civil engineering net-like sheet 30 in Example 3 has a row of connecting holes 21 formed in the central longitudinal reinforcing band 10c and the central lateral reinforcing band 10d in the civil engineering net-like sheet 20 of Example 2 in FIG. As shown in the figure, the connecting holes 31a and 31b are formed by simultaneous weaving in two rows. Therefore, about the same location as Example 2, it uses the description of Example 2 and shows it with the same code as Example 2.

  When the civil engineering net-like sheet 30 in which the connection holes 31a and 31b are formed in this manner is cut into half as shown in FIG. 9, as shown in FIG. Since there is no overlapping portion, it can be laid flat, and there is an advantage that material costs can be saved by using the remaining half-cut portion.

  FIG. 11 is a surface view of a civil engineering net-like sheet according to Example 4, FIG. 12 is a surface view showing a state in which the civil engineering net-like sheets according to Example 4 are stacked vertically and horizontally, and FIG. It is a perspective view which shows the use condition of the net-like sheet | seat for civil engineering which concerns.

  The civil engineering net-like sheet 40 in Example 4 is obtained by reducing the width of the civil engineering net-like sheet 10 in half to a half, and has a rectangular shape with a width of about 1 m and a length of about 4 m. . This length may be extended up to about 50 m. Therefore, about the same location as Example 1, it uses the description of Example 1 and shows with the same code | symbol as Example 1. FIG.

  As shown in FIG. 12, the civil engineering net-like sheet 40 is vertically and horizontally stacked in a cross shape, and as shown in FIG. 13, the left and right and upper and lower overhanging portions 40B to 40E excluding the center overlapping region 40A are erected, When the adjacent connecting holes 11 are connected by the rope A, there is an advantage that they can be assembled in a box shape.

  The fiber-based or resin-based geogrid according to the present invention is used in a laying net construction method laid on the ground to stabilize and strengthen soft ground and steep embankments, and to stabilize the ground of buildings and airport runways. To be used for civil engineering work such as seawall revetment work, creation work, rooting work or scouring prevention work (erosion prevention work), revetment greening work, pier scouring prevention work, emergency measures (disaster recovery) reinforcement embankment, etc. Can do.

It is a surface view of the net-like sheet body for civil engineering according to Example 1. 1 is a partially enlarged perspective view of a civil engineering net-like sheet body according to Embodiment 1. FIG. It is a partial expanded end view of the net-like sheet body for civil engineering according to the first embodiment. It is a surface view which shows the use condition of the net-like sheet | seat body for civil engineering which concerns on Example 1. FIG. It is a surface view of the net-like sheet for civil engineering according to Example 2. It is a surface view which shows the use condition of the net-like sheet | seat body for civil engineering which concerns on Example 2. FIG. It is an end view in the use condition of the net-like sheet | seat body for civil engineering which concerns on Example 2. FIG. It is a surface view of the net-like sheet for civil engineering according to Example 3. It is a surface view which shows the state which cut the net-like sheet | seat for civil engineering which concerns on Example 3 in half. It is a surface view which shows the state which connected the net-like sheet | seat for civil engineering which concerns on Example 3 to the other net-like sheet | seat for civil engineering. It is a surface view of the net-like sheet body for civil engineering according to Example 4. It is a surface view which shows the state which put together the net-like sheet | seat for civil engineering concerning Example 4 vertically and horizontally. It is a perspective view which shows the use condition of the net-like sheet | seat for civil engineering which concerns on Example 4. FIG. It is a surface view of the conventional net-like sheet body for civil engineering. It is a partial expansion perspective view of the conventional net-like sheet body for civil engineering. It is a partial expanded end view of the conventional net-like sheet body for civil engineering.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 .... Net-like sheet | seat for civil engineering 10a ... Net part 10b ... Side part reinforcement zone 11 ... Connection hole A ... Rope 10c ... Center longitudinal reinforcement zone 10d ...・ Central lateral reinforcement zone 20... Net-like sheet for civil engineering 21... Connection hole 30... Net-like sheet for civil engineering 31 a ... Connection hole 31 b ... Connection hole 40. ..Net-like sheet for civil engineering 40A ... Overlapping area 40B-40E ... Overhang

Claims (5)

A fiber-based or resin-based geogrid comprising a surrounding reinforcing band and an inner net part, and the reinforcing band is formed integrally with the formation of the net part. 2. The reinforcing band formed integrally with the formation of the net part at an appropriate interval is formed in one or both of the longitudinal direction and the lateral direction of the net part. Fiber-based or resin-based geogrid. 2. The reinforcing band is formed of a high-density mesh having a finer mesh than the mesh of the net portion, and the high-density mesh is coated with a synthetic resin and the grid crossing portion of the high-density mesh is bonded. Or the fiber-type or resin-type geogrid of 2. The fiber-based or resin-based geogrid according to claim 1 or 2, wherein the reinforcing zone is formed by laminating a synthetic resin film. The connecting hole is formed in the reinforcing zone by arranging warps and wefts, or the connecting hole is formed at the same time as forming the reinforcing zone by punching or sewing. The fiber-based or resin-based geogrid according to 1.

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