JP2006090077A - Ground reinforcement structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lightweight ground reinforcement structure having the sufficient thickness. <P>SOLUTION: This ground reinforcement structure 1 is composed of a braided body 2 braided by superposing a first resin net 3A and a second resin net 3B, and a crushed rubber piece 4 filled between the resin nets 3A and 3B of the braided body 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a ground reinforcement structure embedded in the ground to reinforce the ground.

  A method of reinforcing a ground by embedding a resin net or sandbag in the ground is widely used.

  Japanese Patent Application Laid-Open No. 2001-329540 describes a ground reinforcement resin net in which spike-like convex portions and concave portions are provided in the resin portion of the net. In the resin net of the same publication, the wedge effect of the convex part and the concave part improves the biting force of the net on the soil, making it possible to reinforce the ground more firmly.

Sandbags have recently been used as ground reinforcement structures to replace discarded concrete filled in the ground (such as root cutting parts) due to their excellent functionality (vibration control, ease of construction, low cost, etc.). Attention has been paid.
JP 2001-329540 A

  The resin net is relatively lightweight and excellent in handling at the time of transportation and installation. However, since the thickness is small, it is not suitable as a ground reinforcing structure filled in the ground.

  On the other hand, the sandbag has a relatively large thickness and is suitable as a ground reinforcing structure to be filled in the ground, but because of its weight, it is inferior in handleability during transportation.

  An object of this invention is to provide the ground reinforcement structure which is lightweight and has sufficient thickness.

  The ground reinforcing structure of the present invention comprises a braided body formed by braiding a first resin net and a second resin net, and a crushed rubber piece filled between the resin nets of the braided body. It is prepared.

  In the ground reinforcing structure according to the present invention, since the crushed rubber pieces are filled between the first resin net and the second resin net of the braided body, there is a thickness, and the ground such as the root cutting part is formed. It is suitable as a ground reinforcing structure filled inside. Moreover, since this ground reinforcement structure is mainly comprised from resin and rubber | gum, it is comparatively lightweight and can perform operations, such as conveyance and installation, easily.

  Furthermore, the ground reinforcement structure of the present invention is excellent in vibration absorption due to the elasticity of the crushed rubber pieces filled in the braided body. Moreover, water permeability is also ensured through the mesh openings of the resin nets and the gaps between the crushed rubber pieces.

  In the ground reinforcement structure according to claim 2, the tensile strength of the resin part of the resin net is improved, and a strong braided body is formed.

  In the ground reinforcement structure according to the third aspect, the convex portion provided on the resin net bites into the ground, and the ground reinforcement structure is firmly fixed.

  In the ground reinforcement structure according to the fourth aspect, the first resin net and the second resin net can be braided very easily.

  This resin net is preferably made of an ultrahigh molecular weight polyethylene resin sheet.

  In this case, the ultra high molecular weight polyethylene preferably has a molecular weight of 1,000 to 10,000,000 (Claim 6).

  By using the crushed rubber piece of the waste tire as the crushed rubber piece (claim 7), the waste tire can be used effectively.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a ground reinforcement structure according to an embodiment, and FIG. 2 is a cross-sectional view taken along the line II-II in FIG.

  The ground reinforcing structure 1 is filled between a braided body 2 formed by superposing and braiding the first resin net 3A and the second resin net 3B, and between the resin nets 3A and 3B of the braided body 2. And crushed rubber pieces 4.

  In this embodiment, the first resin net 3A and the second resin net 3B are made of the same resin net. In this embodiment, the resin nets 3A and 3B are manufactured by the following procedure.

  First, a large number of holes (openings) 3a regularly arranged in the longitudinal direction and the width direction are formed in a long belt-shaped resin sheet by press (punching) processing or the like. In this embodiment, spike-like convex portions 3c are formed on each resin portion (width direction resin portion) 3b extending in the width direction of the perforated resin sheet by the press working or the like.

  Next, this resin sheet is heated to a temperature at which it can be stretched. Next, the resin sheet is pulled in the longitudinal direction by a pinch roller or the like, and each resin portion (longitudinal resin portion) 3d extending in the longitudinal direction is stretched.

  Thereafter, the resin sheet is cut into a predetermined length and a predetermined width as necessary to form two resin nets 3A and 3B.

  This resin sheet is preferably an ultrahigh molecular weight polyethylene resin sheet. In this case, the ultra high molecular weight polyethylene preferably has a molecular weight of 1,000 to 10,000,000, particularly 100,000 to 400,000. The ultrahigh molecular weight polyethylene preferably has a density of 0.9 or more, and preferably has 0.3 butyl group side chains per molecule.

  The stretching amount of the longitudinal resin portion 3d of the ultrahigh molecular weight polyethylene resin sheet is preferably 5 times or more before stretching. When the stretch amount is 5 times or less, the tensile strength of the longitudinal resin portion 3d is insufficient.

  As shown in FIG. 2, the first resin net 3A and the second resin net 3B are first overlapped with the surfaces on which the convex portions 3c are not provided facing each other, and then the first resin net 3B is overlapped. The middle portion of the longitudinal resin portion 3d of the net 3A is pushed into the front side of the second resin net 3B through the hole 3a of the second resin net 3B, and then the longitudinal length of the pushed first resin net 3A. The binding linear body 5 is inserted between the directional resin portion 3d and the longitudinal resin portion 3d of the second resin net 3B so as to be braided.

  In this embodiment, the first resin net 3A and the second resin net 3B are bound by the linear body 5 at a plurality of locations at a predetermined interval. Thereby, the inside of the braided body 2 is partitioned into a plurality of chambers as shown in the figure, and each chamber is filled with a crushed rubber piece 4.

  The binding linear body 5 is made of various materials such as metal and resin.

  In this embodiment, the crushed rubber piece 4 is a crushed rubber piece of a waste tire. This waste tire crushing rubber piece is obtained by crushing a waste tire by mechanical processing.

  In the ground reinforcing structure 1 having such a configuration, the crushed rubber pieces 4 are filled between the first resin net 3A and the second resin net 3B of the braided body 2, and thus there is a thickness. It is suitable as a ground reinforcing structure filled in the ground such as a cut portion. Moreover, since this ground reinforcement structure 1 is mainly comprised from resin and rubber | gum, it is comparatively lightweight and can perform operations, such as conveyance and installation, easily.

  Furthermore, this ground reinforcement structure is excellent in vibration absorption due to the elasticity of the crushed rubber pieces 4 filled in the braided body 2. Moreover, water permeability is also ensured through the mesh openings of the resin nets 3A and 3B and the gaps between the crushed rubber pieces 4.

  In this embodiment, since the crushed rubber piece of the waste tire is used as the crushed rubber piece 4, the waste tire can be effectively used.

  The above embodiment shows an example of the present invention, and the present invention is not limited to the above embodiment.

  For example, in this embodiment, resin nets 3A and 3B obtained by extending only the longitudinal resin portion 3d are used, but a resin net obtained by extending the width direction resin portion may also be used.

  In this embodiment, the first resin net 3A and the second resin net 3B are braided using the binding linear body 5, but the two resin parts are bonded together by adhesion or welding. It may be a braided body.

  A crushed rubber piece other than a waste tire may be used as the crushed rubber piece 4 filled in the braided body 2. The crushed rubber pieces 4 may be filled in the braided body 2 as a mere aggregate, or may be bonded to each other in advance.

It is a perspective view of the ground reinforcement structure concerning an embodiment. It is sectional drawing which follows the II-II line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ground reinforcement structure 2 Braided body 3A 1st resin net 3B 2nd resin net 3a Hole part 3b, 3d Resin part 3c Convex part 4 Crushed rubber piece 5 Wire body for binding

Claims (7)

A braided body formed by superposing and braiding the first resin net and the second resin net;
A ground reinforcing structure comprising a crushed rubber piece filled between resin nets of the braided body.   The resin net according to claim 1, wherein the resin net is formed with a plurality of holes regularly arranged in a longitudinal direction and a width direction in a long resin sheet, and the longitudinal resin portion of the resin sheet is formed in the longitudinal direction. A ground reinforcing structure that is elongated and has a hole-like shape extending in the longitudinal direction.   The ground reinforcing structure according to claim 2, wherein a convex portion is provided in the resin portion in the width direction of the resin sheet.   In Claim 2 or 3, a part of longitudinal direction resin part of the 1st resin net arrange | positioned at one side of the said 2nd resin net passes through the hole of the 2nd resin net, and the 2nd resin net The first resin is pushed into the opposite side by inserting the binding linear body between the pushed-in longitudinal resin portion of the first resin net and the longitudinal resin portion of the second resin net. A ground reinforcing structure in which a net and a second resin net are braided.   The ground reinforcing structure according to any one of claims 2 to 4, wherein the resin sheet is an ultrahigh molecular weight polyethylene resin sheet.   The ground reinforcing structure according to claim 5, wherein the ultra high molecular weight polyethylene has a molecular weight of 1,000 to 10,000,000.   The ground reinforcing structure according to any one of claims 1 to 6, wherein the crushed rubber piece is a crushed rubber piece of a waste tire.

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