1.1本规程包括通过X射线照相法测定薄壁管中土壤样品或挤压芯的质量。 1.2本规程使用户能够确定采样的影响和样品内的自然变化，如X射线通过土壤样品的相对穿透程度所确定。 1.3本规程可用于在约2至6英寸的薄壁管或内衬中进行X射线检查（或在荧光镜上观察其特征）。（51至152 mm）。大直径管道中样品的X射线提供了土壤和扰动主要特征的射线照片，例如变纹粘土边缘的大规模弯曲、剪切面、存在大的混凝土、厚度超过1/4英寸的淤泥和砂层。 （6.4 mm）、大块有机物、空洞或其他类型的侵入体。直径较小的岩芯的X射线可以提供更高的土壤特征和扰动分辨率，例如小的结核（直径1/8英寸（3.2毫米）或更大）、溶液通道、变泥边缘的轻微弯曲、薄的淤泥或砂层、狭窄的溶液通道、植物根结构和有机质。薄壁管或内衬中样品的X射线照相只需最少的准备工作 1.4与金属管中的样品相比，通过对挤压芯进行X射线照相，可以获得土壤各种特征的更详细信息和分辨率。用于X的方法- 射线芯与管子和衬里的芯相同，只是挤压芯必须极其小心地处理，并且必须在X射线之前放置在样品架（类似于图2）中。只有当自然湿度或其他原状土特性与样品的最终使用无关时，才应使用该做法。 1.4.1通常需要获得更高的特征分辨率，以确定采样方法的适当性、土壤样品的代表性或土壤中的异常。本规程要求获得重复样品或对已经测试的样品进行X射线检查。 1.5只有通过对X- 射线胶片和样品X射线。 1.6以英寸-磅为单位的数值应视为标准值。括号中给出的SI值仅供参考。 1.7本规程提供了一套用于执行一个或多个特定操作的说明。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。 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。 具体预防说明见第6节。

1.1 This practice covers the determination of the quality of soil samples in thin wall tubes or of extruded cores by X-ray radiography. 1.2 This practice enables the user to determine the effects of sampling and natural variations within samples as identified by the extent of the relative penetration of X-rays through soil samples. 1.3 This practice can be used to X-ray cores (or observe their features on a fluoroscope) in thin wall tubes or liners ranging from approximately 2 to 6 in. (51 to 152 mm) in diameter. X-rays of samples in the larger diameter tubes provide a radiograph of major features of soils and disturbances, such as large scale bending of edges of varved clays, shear planes, the presence of large concretions, silt and sand seams thicker than 1/4 in. (6.4 mm), large lumps of organic matter, and voids or other types of intrusions. X-rays of the smaller diameter cores provide higher resolution of soil features and disturbances, such as small concretions (1/8 in. (3.2 mm) diameter or larger), solution channels, slight bending of edges of varved clays, thin silt or sand seams, narrow solution channels, plant root structures, and organic matter. The X-raying of samples in thin wall tubes or liners requires minimal preparation 1.4 Greater detail and resolution of various features of the soil can be obtained by X-raying of extruded cores, as compared to samples in metal tubes. The method used for X-raying cores is the same as that for tubes and liners, except that extruded cores have to be handled with extreme care and have to be placed in sample holders (similar to Fig. 2) before X-raying. This practice should be used only when natural moisture or other undisturbed soil characteristics are irrelevant to the end use of the sample. 1.4.1 Often it is necessary to obtain greater resolution of features to determine the propriety of sampling methods, the representative nature of soil samples, or anomalies in soils. This practice requires that either duplicate samples be obtained or already tested specimens be X-rayed. 1.5 This practice can only be used to their fullest extent after considerable experience is obtained through many detailed comparisons between the X-ray film and the sample X-rayed. 1.6 The values stated in inch-pound units are to be regarded as the standard. The SI values given in parentheses are provided for information purposes only. 1.7 This practice 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 projects 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. 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. For specific precaution statements, see Section 6.