1.1本规程涵盖了现场调查用岩芯钻探、取芯和岩石取样的指南、要求和程序。钻孔可以是垂直的、水平的或成角度的。 1.2本规程是在获取结构设计、施工或维护数据的背景下描述的，适用于地表钻孔和平硐和勘探隧道的钻孔。 1.3本规程适用于硬岩和软岩中的岩心钻探。 1.4本规程未涉及地质勘探的岩芯钻探注意事项- 环境现场特征和水质监测装置的安装（见指南D 5782和D 5783）。 1.5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。 1.6本规程并不旨在全面解决与岩石取芯和取样相关的所有方法和问题。用户应寻求合格的专业人员，以决定最适合其现场调查的适当设备和方法。 其他方法可用于岩石钻孔和取样，合格的专业人员应具有灵活性，以对本实践中未涵盖的可能替代方案进行判断。这一做法在发布时是最新的，但在修订之前可能会有新的替代方法；因此，用户应在指定程序要求之前咨询制造商或生产商。 本实践提供了一组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。 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。 此外，用户在使用本规程时必须遵守现行监管规范，如OSHA（职业健康安全管理局）指南。有关良好的安全实践，请参阅适用的OSHA法规和其他钻井安全指南 () . ====意义和用途====== 岩芯是在给定钻孔位置记录现有地下条件的样本。 预计样品将产生有关地下地质、物理和工程性质的重要指示，用于工程结构的设计和施工（见指南D 420） . 需要使用特定程序将岩芯样品保存规定的时间（规程D 5079 ). 储存期取决于工程结构的性质和重要性。 岩芯的处理始终需要确保其性能不会因机械损伤或湿度、温度或其他环境因素的环境条件变化而发生任何变化。

1.1 This practice covers the guidelines, requirements, and procedures for core drilling, coring, and sampling of rock for the purposes of site investigation. The borehole could be vertical, horizontal, or angled. 1.2 This practice is described in the context of obtaining data for the design, construction, or maintenance of structures, and applies to surface drilling and drilling from adits and exploratory tunnels. 1.3 This practice applies to core drilling in hard and soft rock. 1.4 This practice does not address considerations for core drilling for geo-environmental site characterization and installation of water quality monitoring devices (see Guides D 5782 and D 5783). 1.5 The values stated in inch-pound units are to be regarded as standard. The SI values given in parentheses are provided for information purposes only. 1.6 This practice does not purport to comprehensively address all of the methods and the issues associated with coring and sampling of rock. Users should seek qualified professionals for decisions as to the proper equipment and methods that would be most successful for their site investigation. Other methods may be available for drilling and sampling of rock, and qualified professionals should have flexibility to exercise judgment as to possible alternatives not covered in this practice. This practice is current at the time of issue, but new alternative methods may become available prior to revisions; therefore, users should consult with manufacturers or producers prior to specifying program requirements. 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 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. 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. Also, the user must comply with prevalent regulatory codes, such as OSHA (Occupational Health and Safety Administration) guidelines, while using this practice. For good safety practice, consult applicable OSHA regulations and other safety guides on drilling () . ====== Significance And Use ====== Rock cores are samples of record of the existing subsurface conditions at given borehole locations. The samples are expected to yield significant indications about the geological, physical, and engineering nature of the subsurface for use in the design and construction of an engineered structure (see Guide D 420 . The core samples need to be preserved using specific procedures for a stipulated time (Practices D 5079 ). The period of storage depends upon the nature and significance of the engineered structure. Rock cores always need to be handled such that their properties are not altered in any way due to mechanical damage or changes in ambient conditions of moisture and temperature or other environmental factors.