1.1 本试验方法涵盖了在恒定持续荷载下压缩剪切不排水时，测定（未扰动）现场样品或实验室制造的化学灌浆土壤的圆柱形试样的长期强度和变形。 注1: 化学灌浆土壤的孔隙通常由灌浆填充。因此，不太可能产生孔隙压力。本试验方法不适用于可能产生大量孔隙压力的部分灌浆土壤。如果必须测量孔隙压力，请参考试验方法 D4767 用于设备和程序。 1.2 本试验方法提供了有助于确定承受持续荷载的化学灌浆土壤的强度和变形特性的数据。也可以确定莫尔强度包络线。 1.3 强度包络线的确定和关系的发展，以帮助解释和评估测试结果，留给工程师或要求测试的办公室。 1.4 所有观察值和计算值应符合实践中确定的有效数字和舍入准则 D6026 . 1.5 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中的值可能不是完全等效的，因此，每个系统必须独立于其他系统使用，而不以任何方式组合值。 1.6 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和健康实践，并确定监管限制的适用性。 1.7 该测试方法提供了一组用于执行一个或多个特定操作的指令。本文件不能取代教育或经验，应与专业判断一起使用。并非本惯例的所有方面都适用于所有情况。 本ASTM标准不代表或取代必须根据其判断给定专业服务的充分性的谨慎标准，也不应在不考虑项目的许多独特方面的情况下应用本文件。本文件标题中的“标准”一词仅表示该文件已通过ASTM共识程序获得批准。 ====意义和用途====== 4.1 这些试验的数据可用于结构和地质力学设计目的。用户必须根据工程判断确定足够的安全系数。 注2: 原位试样的取样程序对试验结果有重大影响。在测试之前，在实验室从现场采集的大块样本中仔细修剪的样本发生破裂的可能性最小。实验室制作试样的样品制备方法也对试验结果有重大影响。应根据试验方法制作试样 D4320 . 注3: 该测试方法产生的结果质量取决于执行该测试的人员的能力，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、抽样和检查。本试验方法的使用者应注意遵守规程 D3740 本身并不能保证可靠的结果。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 long-term strength and deformation of a cylindrical specimen of either a (undisturbed) field sample or laboratory-fabricated chemical grouted soil when it is sheared undrained in compression under a constant sustained load. Note 1: The voids of chemical grouted soils are most often substantially filled with grout. Thus, pore pressures are unlikely to develop. This test method is not applicable to partially grouted soils in which substantial pore pressures may develop. If pore pressures must be measured, reference is made to Test Method D4767 for equipment and procedures. 1.2 This test method provides data useful in determining strength and deformation properties of chemical grouted soils subjected to sustained loads. Mohr strength envelopes may also be determined. 1.3 The determination of strength envelopes and the development of relationships to aid in interpreting and evaluating test results are left to the engineer or office requesting the test. 1.4 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026 . 1.5 The values stated in either SI or inch-pound units shall be regarded separately as standard. The values in each system may not be exact equivalents, therefore, each system must be used independently of the other, without combining values in any way. 1.6 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. 1.7 This test method offers a set of instructions for performing one or more specific operations. This document cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this practice may be applicable in all circumstances. This ASTM standard is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this document be applied without consideration of a project's many unique aspects. The word “Standard” in the title of this document means only that the document has been approved through the ASTM consensus process. ====== Significance And Use ====== 4.1 Data from these tests may be used for structural and geomechanical design purposes. Adequate safety factors, based on engineering judgment must be determined by the user. Note 2: Sampling procedures for in-situ specimens have a major influence on test results. Specimens carefully trimmed in the laboratory from large block samples taken in the field have the least chance of fracturing prior to testing. Sample preparation methods of laboratory-fabricated specimens also have a major influence on test results. Specimens should be fabricated in accordance with Test Method D4320 . Note 3: The quality of the result produced by this test method 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, and inspection. Users of this test method are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some of those factors.