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岩土地层结构是影响工程稳定与安全的重要因素,是地质及岩土工程勘测的主要内容。研发了一种地层地质界面识别系统,阐述了其基本组成和工作原理,建立了钻进过程识别码及岩土地层结构实时识别方法;通过花岗岩地基钻进试验研究,确定了岩体风化等级以及土层/散体、碎裂岩体及整体岩体结构的比能值范围,建立了金刚石钻进比能的地层结构分级标准,比能值分别是土层及散体为0.0017~0.6955 k N·m/cm3,碎裂岩体为0.0258~0.9798 k N·m/cm3,整体岩体为0.0018~2.4935 k N·m/cm3。研究结果表明,该方法与岩土勘测结果一致,可用于地层地质及岩土地层结构的实时识别,为岩土工程智能勘测提供了新的途径。
Geotechnical stratum structure is an important factor affecting the stability and safety of the project, and is the main content of geological and geotechnical survey. Developed a stratum geological interface identification system, described its basic composition and working principle, established a drilling process identification code and real-time identification of geotechnical stratum structure; through granite foundation drilling test study to determine the rock mass weathering grade and Soil layer / bulk, crushed rock mass and the whole rock mass structure of the specific energy range, established a diamond ratio of stratigraphic grading criteria for drilling, the specific value of soil and soil bulk density of 0.0017 ~ 0.6955kN · M / cm3, the mass fraction of crushed rock is 0.0258-0.9798 kN · m / cm3, and the whole rock mass is 0.0018-2.4935 kN · m / cm3. The results show that the method is consistent with the results of geotechnical survey and can be used for real-time identification of stratum geology and geotechnical stratum structure, which provides a new way for intelligent geotechnical survey.