ISO 13426-1:2019 ジオテキスタイルおよびジオテキスタイル関連製品—内部構造接合部の強度—パート1：ジオセル | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 221, Geosynthetics.

This second edition cancels and replaces the first edition (ISO 13426-1:2003), which has been technically revised. The main changes compared to the previous edition are as follows:

— Clauses 2, 5, 6, 7, 8 and all the figures have been technically revised.

A list of all parts in the ISO 13426 series can be found on the ISO website.

Introduction

Geocells are geotextile-related products composed of single strips interconnected in several possible ways (extrusion, thermal bonding, gluing, hot melt, stitching, etc.) to form a panel of adjacent cells ここで, generally the contact between two elements occurs along lines or in specific points, and not uniformly on the whole surface. These lines or points are referred to as"junctions".

A geocell junction can fail in four different ways:

• 1) by shear (see Figure 1): when failure is caused by a force parallel to the junction itself;
• 2) by peeling or delamination (see Figure 2): when failure is caused by a force, normal to the junction, which separates the cells from each other at one edge of the junction;
• 3) by splitting (see Figure 3): when a force, normal to the junction, pulls away the two cells adjacent to the junction;
• 4) by local overstressing (see e.g. Figure 4: geocells secured with pins): when the fixation element locally overstresses the junction, leading to a compression, shear or peel failure.

It is therefore impossible to define one single testing method for measuring the junction strength of geocells. Hence this document includes the principles for testing the four failure mechanisms explained above. These principles should be adapted to each single product. In order to avoid confusion about the interpretation of figures, reference should be made to the exact test method in test reports and data sheets, e.g. ISO 13426-1:2019, 4.1.

1 Scope

This document describes index test methods for the determination of the strength of internal structural junctions of geocells under different loading conditions.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

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Bibliography