1.1 土工合成材料从土壤中拔出的阻力是使用实验室拔出箱测定的。 1.2 该测试方法旨在尽可能紧密地进行性能测试，以复制设计或竣工条件。它还可用于比较不同的土工合成材料、土壤类型等，从而用作研发测试程序。 1.3 以国际单位制表示的数值应视为标准值。括号中的数值仅供参考。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 拉拔测试方法旨在作为性能测试，为用户提供一组测试条件的设计值。 5.1.1 该试验方法适用于所有土工合成材料和所有土壤。 5.1.2 该试验方法产生的试验数据可用于土工合成材料加筋挡土墙、边坡和路堤的设计，或在模拟现场条件下土工合成材料抗拔力很重要的其他应用中。 5.1.3 试验结果还可以提供与土工合成材料在限制荷载条件下的土内应力应变响应相关的信息。 5.2 从本试验中获得的抗拔力与法向应力图是土壤级配、塑性、放置时的干容重、含水量、土工合成材料的长度和表面特征以及其他试验参数的函数。因此，结果以实际测试条件表示。该试验测量了拉拔机制组合的净效应，其可能因土工合成材料试样类型、嵌入长度、相对开口尺寸、土壤类型、位移率、法向应力和其他因素而异。 5.3 实验室之间关于精度的信息不完整。在有争议的情况下，可以进行比较测试，以确定实验室之间是否存在统计偏差。

1.1 Resistance of a geosynthetic to pullout from soil is determined using a laboratory pullout box. 1.2 The test method is intended to be a performance test conducted as closely as possible to replicate design or as-built conditions. It can also be used to compare different geosynthetics, soil types, etc., and thereby be used as a research and development test procedure. 1.3 The values stated in SI units are to be regarded as standard. The values stated in parentheses are provided for information only. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 The pullout test method is intended as a performance test to provide the user with a set of design values for the test conditions examined. 5.1.1 The test method is applicable to all geosynthetics and all soils. 5.1.2 This test method produces test data, which can be used in the design of geosynthetic-reinforced retaining walls, slopes, and embankments, or in other applications where resistance of a geosynthetic to pullout under simulated field conditions is important. 5.1.3 The test results may also provide information related to the in-soil stress-strain response of a geosynthetic under confined loading conditions. 5.2 The pullout resistance versus normal stress plot obtained from this test is a function of soil gradation, plasticity, as-placed dry unit weight, moisture content, length and surface characteristics of the geosynthetic, and other test parameters. Therefore, results are expressed in terms of the actual test conditions. The test measures the net effect of a combination of pullout mechanisms, which may vary depending on type of geosynthetic specimen, embedment length, relative opening size, soil type, displacement rate, normal stress, and other factors. 5.3 Information between laboratories on precision is incomplete. In cases of dispute, comparative tests to determine if there is a statistical bias between laboratories may be advisable.