1.1本试验方法包括确定非饱和土壤被流体淹没时发生的一维坍塌的大小。 1.2本试验方法可用于确定给定垂直（轴向）应力下可能发生的潜在坍塌的大小，以及用于评估坍塌可能性的指数。 1.3本试验方法规定了试样制备技术、仪器和程序，用于量化与坍塌相关的高度变化量，以及报告试验结果的程序。 1.4本试验方法中给出的程序适用于原状和重塑试样。 1.5以国际单位制表示的数值应视为标准。括号中的英寸-磅单位仅供参考。 1.6以国际单位制表示的数值应视为标准。括号中的英寸-磅单位仅供参考。 1.6.1 1.7 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。

1.1 This test method covers the determination of the magnitude of one-dimensional collapse that occurs when unsaturated soils are inundated with fluid. 1.2 This test method may be used to determine the magnitude of potential collapse that may occur for a given vertical (axial) stress and an index for rating the potential for collapse. 1.3 This test method specifies the technique for specimen preparation, apparatus, and procedure for quantifying the amount of height change associated with collapse and procedures for reporting test results. 1.4 The procedures given in this test method are applicable to both undisturbed and remolded specimens. 1.5 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are for information only. 1.6 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are for information only. 1.6.1 1.7 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.