1.1 本试验方法包括当渗透系数大于1×10时，测定基本饱和、完整的泥炭圆柱形试样的渗透系数 −7. 米/秒（1×10 −5. 厘米/秒）。在试验过程中，样本包含在岩心夹持器中，或从最初在现场获得样本的取样管上切下的右侧规则圆柱形截面中。 1.2 根据在恒定水头下通过试样的测量恒定流速计算导水率。 2. 为了验证，可以在两个或多个恒定水头值下进行流速测定，并相应计算导水率。 1.3 单位- 以国际单位制表示的数值应视为标准值。括号中给出的值仅供参考，不被视为标准值。 1.3.1 转换后的英寸-磅单位使用重力单位制。在这个系统中，磅（lbf）表示力（重量）的单位，而质量的单位是段塞。除非涉及动态（F=ma）计算，否则未给出转换后的段塞单元。 1.4 所有观察值和计算值应符合实践中制定的有效数字和舍入指南 D6026 . 1.4.1 本标准中用于规定如何收集/记录和计算数据的程序被视为行业标准。 此外，它们代表了通常应保留的有效数字。使用的程序不考虑材料变化、获取数据的目的、特殊目的研究或用户目标的任何考虑因素，通常做法是增加或减少报告数据的有效数字，以与这些考虑因素相称。考虑工程设计分析方法中使用的有效数字超出了本标准的范围。 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 当沉积物上的唯一有效应力增加是由于地下水位适度、逐渐降低引起的时，通过本试验方法确定的导水率值可能有助于对泥炭沉积物的初始排水和压缩速率进行粗略的初步估计。 4.2 即使在较轻的持续荷载下，泥炭也会发生显著的体积变化，影响（降低）沉积物的水力传导率几个数量级。 本试验方法未提供测定导水率与对应于增加应力水平的孔隙比之间关系的规定。因此，本试验方法不适用于涉及坡度增加的应用，例如路堤施工或排水沟旁边的通道护堤。 4.3 由于材料成分和取样程序的变化，来自同一位置明显均质泥炭沉积物的原状样本通常表现出显著不同的导水性。 注1: 本标准产生的结果的质量取决于执行该标准的人员的能力，以及所用设备和设施的适用性。 符合实践标准的机构 D3740 通常认为能够胜任和客观的测试/采样/检查等。本标准的用户应注意遵守惯例 D3740 本身不能确保可靠的结果。可靠的结果取决于许多因素；实践 D3740 提供了一种评估其中一些因素的方法。

1.1 This test method covers the determination of the hydraulic conductivity (permeability) of essentially saturated, intact cylindrical specimens of peat when the hydraulic conductivity is greater than 1 × 10 −7 m/s (1 × 10 −5 cm/s). During the test, the specimens are contained in the core holder, or in right, regular cylindrical sections cut from the sampling tube in which they were originally obtained in the field. 1.2 Hydraulic conductivity is calculated on the basis of the measured constant flow rate through the specimen under constant head. 2 For verification, flow rate determinations may be made at two or more values of constant head with corresponding calculations of hydraulic conductivity. 1.3 Units— 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. 1.3.1 The converted inch-pound units use the gravitational system of units. In this system, the pound (lbf) represents a unit of force (weight), while the unit for mass is slugs. The converted slug unit is not given, unless dynamic (F = ma) calculations are involved. 1.4 All observed and calculated values shall conform to the guide for significant digits and rounding established in Practice D6026 . 1.4.1 The procedures used to specify how data are collected/recorded and calculated in this standard are regarded as the industry standard. In addition, they are representative of the significant digits that should generally be retained. The procedures used do not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the user's objectives, and it is common practice to increase or reduce significant digits of reported data to be commensurate with these considerations. It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design. 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 Values of hydraulic conductivity determined by this test method may be useful in making rough preliminary estimates of the initial rates of drainage and compression of peat deposits when the only effective stress increase on the deposit is that resulting from a moderate, gradual lowering of the water table. 4.2 Even under light, sustained loads, peat will undergo dramatic volume changes that influence (decrease) the hydraulic conductivity of the deposit by several orders of magnitude. This test method does not offer provisions for the determination of the relationship between hydraulic conductivity and the void ratios corresponding to increasing stress levels. Therefore, this test method is not suitable for applications involving grade increases, such as embankment construction or placement of access berms alongside drainage ditches. 4.3 Undisturbed specimens from apparently homogeneous peat deposits at the same location often exhibit significantly different hydraulic conductivity properties due to variations in material composition and sampling procedure. Note 1: The quality of the result produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing/sampling/inspection/etc. Users of this standard are cautioned that compliance with Practice D3740 does not in itself ensure reliable results. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some of those factors.