1.1 该试验方法包括通过确定嵌入试样的锁定延伸部拉出混凝土所需的压力来确定嵌入混凝土中的具有锁定延伸部的土工膜的液压抗拔出性。 1.2 以SI单位表示的值将被视为标准值。括号中给出的值仅供参考，不被视为标准值。 1.3 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。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法规限制的适用性。 1.4 本国际标准是根据世界贸易组织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的标准化原则制定的技术性贸易壁垒委员会。 ======意义和用途====== 5.1 由于某些应用中可能存在液压，工程师需要了解这些产品抵抗这种压力的能力。该测试允许工程师比较产品并验证拔出强度。 5.2 液压拔出阻力是锁定延伸部尺寸、锁定延伸部几何形状、每面积锁定延伸部、锁定延伸部聚合物组成和其中嵌入锁定延伸部的混凝土的性质的函数。 5.3 该试验方法的数据为评定具有嵌入混凝土中的锁定延伸件的不同土工膜的液压抗拔能力提供了比较信息。液压拔出阻力虽然部分取决于锁定延伸尺寸，但与锁定延伸尺寸和几何形状没有简单的相关性。因此，不能用小样品确定液压拔出阻力，否则可能会对材料的实际液压拔出阻力产生误导性数据。因此，液压拔出阻力以kPa（lb/ft）表示 2 ). 5.4 该设备本质上可以是圆形或方形，且必须具有0.36 m测试面积 2 （558英寸。 2 ). 5.5 图1 示出了可用于执行该测试的圆形测试设备的示例。该设备需要额定最小为690kPa（14410lb/ft）压力容器 2 ).容器试验直径应最小为677.04 mm（26.655 in.），如所示 图1 . 附注1: 可以使用较大的容器，但由用户建立与标准尺寸容器的相关性。由于某些产品的厚度或刚度，使用比本标准中所示直径更小的容器可能有助于提高抗拔出性。5.6 测试基座- 固定试样的测试设备的底座。 5.7 上法兰- 是用螺栓固定在样品顶部以形成密封的法兰。 5.8 形式- 是用于形成试样的铝环，如中所示 图2 . 5.9 标本环- 放置在试样周围的实心环，以控制通过混凝土的渗漏。 5.10 容器将有一个测量压力的系统。 5.10.1 压力测量系统的读数应能达到3.5 kPa（0.5 psi）的精度。 5.11 混凝土应为符合规范的预拌混凝土 C94/C94M 最小固化抗压强度为34473.8 kPa(5 000 psi)。 附注2: 经业主或工程师批准，可将替代混凝土或灌浆混合物用于特定项目的应用。 5.12 所有试验应在23±2°C（73.4±3.6°F）的标准实验室温度下进行。

1.1 This test method covers the determination of the hydraulic pullout resistance of a geomembrane with locking extensions embedded in concrete by determining the pressure required for locking extensions of the embedded specimen to pullout of the concrete. 1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are provided for information only and are not considered standard. 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 Due to hydraulic pressure that may be present on some applications, engineers need to understand the capability of these products to resist this pressure. This test allows engineers to compare products and verify pullout strength. 5.2 Hydraulic pullout resistance is a function of locking extension dimensions, locking extension geometry, locking extensions per area, locking extension polymer composition, and the properties of the concrete in which the locking extensions are embedded. 5.3 The data from this test method provides comparative information for rating hydraulic pullout resistance of different geomembranes with locking extensions embedded in concrete. Hydraulic pullout resistance, while partly dependent on locking extension dimensions, has no simple correlation to locking extension dimensions and geometry. Hence, hydraulic pullout resistance cannot be determined with a small sample without potentially producing misleading data to the actual hydraulic pullout resistance of the material. Therefore, the hydraulic pullout resistance is expressed in kPa (lb/ft 2 ). 5.4 The apparatus can be circular or square in nature and must have a test area of 0.36 m 2 (558 in. 2 ). 5.5 Fig. 1 shows an example of a circular test apparatus that can be used in the performance of this test. The apparatus requires a pressure vessel rated to a minimum 690 kPa (14 410 lb/ft 2 ). The vessel test diameter should be a minimum of 677.04 mm (26.655 in.) as shown in Fig. 1 . Note 1: Larger vessels may be used but it is up to user to establish correlation to the standard size vessel. The use of a smaller diameter vessel than denoted in this standard may contribute to higher pullout resistance due to thickness or stiffness of some products. 5.6 Test Pedestal— The base of the testing apparatus which holds the test specimen. 5.7 Upper Flange— Is the flange that is bolted down on top of specimen to create a seal. 5.8 Form— Is an aluminum ring used to form test specimen as shown in Fig. 2 . 5.9 Specimen Ring— The solid ring that is placed around test specimen to contain leakage through the concrete. 5.10 The vessel will have a system to measure pressure. 5.10.1 The system for measuring pressure shall be capable of being read to an accuracy of 3.5 kPa (0.5 psi). 5.11 Concrete shall be a ready-mixed concrete per Specification C94/C94M with a minimum cured compressive strength of 34 473.8 kPa (5 000 psi). Note 2: Alternate concrete or grout mixtures may be used for project-specific applications with the approval of the owner or engineer. 5.12 All tests shall be conducted at standard laboratory temperatures of 23 ± 2 °C (73.4 ± 3.6 °F).