1.1本试验方法用于建立由土壤贯入仪测定的细粒土的抗水分渗透关系。 1.2以英寸-磅为单位的数值应视为标准值。 1.3本标准无意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和健康实践，并确定监管限制的适用性。 ====意义和用途====== 本试验方法与试验方法D 698的方法A和B一起使用 建立含水量、密度和渗透阻力之间的关系。这些关系与之前准备的一系列水分渗透曲线一起使用，作为快速现场测试，以确定土壤中的大致水分量。 笔记 1-当在给定含水量下对现场材料的渗透阻力测量值与在指定压实力下绘制的渗透密度曲线进行比较时，可以获得压实（密度）的近似检查。 对于非常干燥的模制土壤样本或非常颗粒状的土壤，渗透阻力测定不可靠。 笔记 2-尽管本标准中包含精度和偏差声明，但本试验方法的精度取决于执行人员的能力以及所用设备和设施的适用性。符合实践D 3740标准的机构 通常认为能够胜任和客观测试。本试验方法的使用者应注意遵守实施规程D 3740 本身不能保证可靠的测试。可靠的测试取决于许多因素；实践D 3740 提供了一种评估其中一些因素的方法。

1.1 This test method is for establishing the moisture-penetration resistance relationships of fine-grained soils as determined by the soil penetrometer. 1.2 The values stated in inch-pound units are to be regarded as the 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== This test method is used with Methods A and B of Test Methods D 698 to develop relationships between moisture content, density, and penetration resistance. These relationships are used with a previously prepared family of moisture-penetration curves as a rapid field test to determine the approximate amount of moisture in the soil. Note 1—When a penetration-resistance measurement of material in place is compared at a given moisture content with penetration-density curves prepared at a specified compactive effort, an approximate check of compaction (density) may be obtained. Penetration resistance determinations are not reliable for very dry molded soil specimens or very granular soils. Note 2—Notwithstanding the statements on precision and bias contained in this standard, the precision of this test method is dependent on the competence of the personnel performing it and the suitability of the equipment and the facilities used. Agencies that meet the criteria of Practice D 3740 are generally considered capable of competent and objective testing. Users of this test method are cautioned that compliance with Practice D 3740 does not in itself assure reliable testing. Reliable testing depends on many factors; Practice D 3740 provides a means of evaluating some of those factors.