1.1 该试验方法是一种指数试验，用于测量用直径为50mm的圆柱形探针刺穿土工布和土工布相关产品所需的力。探头的尺寸为土工布提供了多方向的力。 注1: 该试验也称为CBR穿刺试验。 1.2 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 5.1 使用50 mm探头适用于测定特定土工布或土工布相关产品的指数强度阻力和变形。 5.2 该试验方法被认为可用于土工织物商业运输的验收试验。 5.3 如果在使用该测试方法进行商业装运验收测试时，由于报告的测试结果存在差异而引起争议，买方和供应商应进行比较测试，以确定其实验室之间是否存在统计偏差。建议为调查偏差提供合格的统计协助。作为最低要求，双方应采取一组尽可能均匀的试样，这些试样来自所讨论的许多类型。 然后，应将相同数量的试样随机分配给每个实验室进行测试。两个实验室的平均结果应使用未配对数据的学生t检验和测试开始前双方选择的可接受概率水平进行比较。如果发现偏差，必须找到并纠正其原因，或者买方和供应商必须同意根据已知偏差解释未来的测试结果。 5.4 本试验方法不适用于尺寸太小而无法按照本试验方法中的程序放入试验装置的材料。此外，在本试验方法中，分离土工合成材料或土工复合材料层是不合适的。

1.1 This test method is an index test used to measure the force required to puncture a geotextile and geotextile-related products with a 50 mm diameter cylindrical probe. The dimensions of the probe provide a multidirectional force on the geotextile. Note 1: This test is also commonly known as CBR Puncture Test. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 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. 1.4 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 Puncture using a 50 mm probe is applicable to determine the index strength resistance and deformation of a particular geotextile or geotextile-related products. 5.2 This test method is considered satisfactory for acceptance testing of commercial shipments of geotextiles. 5.3 In case of a dispute arising from differences in reported test results when using this test method for acceptance testing of commercial shipments, the purchaser and the supplier should conduct comparative tests to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens that are as homogeneous as possible and that are from a lot of the type in question. The test specimens then should be randomly assigned in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared using Student's t-test for unpaired data and an acceptable probability level chosen by the two parties before the testing is begun. If a bias is found, either its cause must be found and corrected, or the purchaser and the supplier must agree to interpret future test results in light of the known bias. 5.4 This test method is not applicable to materials that are manufactured in sizes that are too small to be placed into the test apparatus in accordance with the procedures in this test method. Furthermore, it is not appropriate to separate plies of a geosynthetic or geocomposite for use in this test method.