1.1 本指南旨在总结评估土工膜接缝所需的测试方法。旨在指导土工膜用户采用适当的评估技术来评估土工膜接缝质量。 1.2 本指南涵盖的土工膜接缝包括:高密度聚乙烯（HDPE）、线性低密度聚乙烯（LLDPE）、极低密度聚乙烯（VLDPE）、柔性聚丙烯（fPP）、聚氯乙烯（PVC）、三元乙丙橡胶（EPDM）、预制沥青土工膜（PBGM）、乙烯共聚物（EIA）和增强土工膜 1.3 虽然已做出重大努力收集本文件完成之日市场上的所有类型的土工膜和相关评估技术，但可能忽略了一些可用的材料和技术。因此，本文件中提供的信息应视为非详尽信息。 1.4 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.5 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。 1.6 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====== 4.1 有许多土工膜类型和接缝技术。本指南旨在帮助从业人员为其材料选择合适的接缝测试方法。 4.2 土工膜是相对不透水的平面材料板，以卷或折叠板的形式运输。 面板可在工厂或现场缝合。本指南为土工膜用户提供了市场上最常见的土工膜材料的最合适接缝评估技术。 4.3 某些类型的土工膜可能未列出，一些接缝评估技术可能对给定的材料具有良好的性能，尽管中可能未指出这一点 表1 . 请了解这种情况的用户联系ASTM，提出本指南的更新建议。 十、 = 可应用的 — = 不适用 O = 可能适用 （A） 这种类型的试验通常不在这种材料上进行，但如果需要，可以进行。 （B） 仅提供接缝连续性的评估，但不提供接缝强度。 （C） 可能不适用于非常灵活的土工膜，尤其是较薄的土工膜，这些土工膜将在真空箱中高度变形。 （D） 在HDPE土工膜接缝上使用空气枪进行钻孔检测有一些经验，尽管这不是常见做法。 （E） 通常适用于1.0 mm及以下的材料。 （F） 适用时。 （G） 仅适用于双线接缝。 （H） 不适用于挤出圆角。 （一） 仅适用于工厂接缝。 （J） 请参阅指南 D6747 . （K） 电气泄漏位置测量有助于监测接缝的连续性，以及在安装后测量整个板材，如适用，在覆盖接地或液体材料时。 它们不会验证材料或接缝的完整性。 4.4 接缝技术在特定工程环境中的相关性超出了本指南的范围。

1.1 This guide is intended for use as a summary of test methods necessary to evaluate geomembrane seams. It is intended to guide geomembrane users toward the appropriate evaluation techniques to assess geomembrane seam quality. 1.2 Geomembrane seams covered by this guide are: high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), very low-density polyethylene (VLDPE), flexible polypropylene (fPP), polyvinyl chloride (PVC), ethylene propylene diene terpolymer (EPDM), prefabricated bituminous geomembranes (PBGM), ethylene interpolymer alloy (EIA), and reinforced geomembranes 1.3 Although a significant effort has been made to gather all types of geomembranes and related evaluation techniques which were on the market at the date of completion of this document, some available materials and technologies may have been omitted. The information presented in this document shall thus be considered to be non-exhaustive. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 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. 1.6 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 ====== 4.1 There are a large number of geomembrane types and seaming techniques. This guide is intended to help practitioners select the appropriate seam test methods for their material. 4.2 Geomembranes are relatively impermeable planar materials sheets that are shipped either as rolls or folded panels. The panels may be seamed in a factory or in the field. This guide provides geomembrane users with the most appropriate seam evaluation techniques for the most common geomembrane materials available on the market. 4.3 Some types of geomembrane may not be listed and some seam evaluation techniques may offer a good performance with a given material although this may not be indicated in Table 1 . Users who are aware of this situation are invited to contact ASTM to propose an update of this guide. X = Applicable — = Not Applicable O = May Be Applicable (A) This type of test not commonly performed on this type of material, but it can be performed if desired. (B) Only provides evaluation of seam continuity, but not seam strength. (C) May not be applicable to very flexible geomembranes, especially thinner ones, that will highly deform into the vacuum box. (D) There are some experiences with air lance on HDPE geomembrane seams for hole detection, although this is not common practice. (E) Typically applicable to materials that are 1.0 mm and thinner. (F) When applicable. (G) Applicable to dual track seam only. (H) Not applicable to extrusion fillet. (I) Applicable to factory seams only. (J) Refer to Guide D6747 . (K) Electrical leak location surveys are useful to monitor the continuity of seams, as well as to survey the entire sheet after installation and, where applicable, while covered with earthen or liquid materials. They do not verify material or seam integrity. 4.4 The relevance of a seaming technique within a particular engineering context is beyond the scope of this guide.