ISO/TS 20432:2022 土壤加固用土工合成材料长期强度测定指南

标准编号：ISO/TS 20432:2022

中文名称：土壤加固用土工合成材料长期强度测定指南

英文名称：Guidelines for the determination of the long-term strength of geosynthetics for soil reinforcement

发布日期：2022-12

标准范围

本文件为确定用于土壤加固的土工合成材料的长期强度提供了指南。本文件描述了一种推导土工合成土壤加固材料折减系数的方法，以考虑蠕变和蠕变破裂、安装损坏和风化以及化学和生物降解。它旨在提供试验数据和加筋土施工规范之间的联系。本文件涵盖的土工合成材料包括主要目的是增强的土工合成材料，例如土工格栅、编织土工织物和条带，其中增强组分由聚酯（聚对苯二甲酸乙二醇酯）、聚丙烯、高密度聚乙烯、聚乙烯醇、芳族聚酰胺和聚酰胺6和6,6制成。本文件不包括土工合成材料之间接缝或焊缝的强度，也不包括这些材料是否比基本材料更耐用或更不耐用。它也不适用于土工膜，例如在垃圾填埋场。它不包括动态载荷的影响。它没有考虑由于土壤温度低于0？℃，也没有冻土的影响。该文件不包括加筋土结构设计的不确定性，也不包括失效的人为或经济后果。

This document provides guidelines for the determination of the long-term strength of geosynthetics for soil reinforcement.

This document describes a method of deriving reduction factors for geosynthetic soil-reinforcement materials to account for creep and creep rupture, installation damage and weathering, and chemical and biological degradation. It is intended to provide a link between the test data and the codes for construction with reinforced soil.

The geosynthetics covered in this document include those whose primary purpose is reinforcement, such as geogrids, woven geotextiles and strips, where the reinforcing component is made from polyester (polyethylene terephthalate), polypropylene, high density polyethylene, polyvinyl alcohol, aramids and polyamides 6 and 6,6. This document does not cover the strength of joints or welds between geosynthetics, nor whether these might be more or less durable than the basic material. Nor does it apply to geomembranes, for example, in landfills. It does not cover the effects of dynamic loading. It does not consider any change in mechanical properties due to soil temperatures below 0 °C, nor the effect of frozen soil. The document does not cover uncertainty in the design of the reinforced soil structure, nor the human or economic consequences of failure.

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