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珊瑚礁是一类特殊的工程建设场地,受地质成因、生物作用、海洋水动力环境和地质环境演化等多方面影响。开展珊瑚礁场地工程地质分区研究,不仅对认识珊瑚礁岩土层的成因和变化规律、分析评价珊瑚礁场地的工程地质条件等具有重要的理论意义,而且对未来南海岛礁工程建设具有重要指导作用。在现场地质调查的基础上,采用现场原位测试、室内试验和钻探岩芯分析等综合技术手段,分析了三亚珊瑚礁地层的演化历史,对地层结构特征、矿物成分、化学成分和土层物理力学性质进行了深入分析,将三亚海岸珊瑚礁场地划分为泻湖沉积区、砂坝堆积区和水下珊瑚生长堆积区;对各工程地质分区的工程特性和建设适宜性进行了分析评价。研究成果可以对珊瑚礁场地的地质调查、工程规划和设计提供指导和借鉴。
Coral reefs are a kind of special project construction site affected by many factors, such as geologic cause, biological function, marine hydrodynamic environment and geological environment evolution. Carrying out the engineering geological division of coral reef site has important theoretical significance not only for understanding the genesis and variation regularity of coral reef and rock formation, analyzing and evaluating the engineering geological conditions of the reef site, but also guiding the construction of the South China Sea reef project in the future. Based on the field geological survey, this paper analyzes the evolution history of the coral reefs in Sanya based on in situ testing, laboratory tests and drilling core analysis, and analyzes the stratum structural characteristics, mineral composition, chemical composition and soil physical mechanics Nature of the coral reefs, the Sanya coast coral reef sites are divided into lagoon deposition area, sand dam deposition area and underwater coral growth accumulation area; the engineering characteristics and construction suitability of each engineering geological zoning are analyzed and evaluated. The research results can provide guidance and reference for geological survey, project planning and design of coral reef sites.