海口超轻质火山灰软黏土成因及物理力学性质研究  

Origin and Physical-Mechanical Properties Study of Haikou Ultra-Lightweight Volcanic Ash Soft Clay

作　　者：谢书领 谢林汐 翟凤艳 王影[1] 杨永康[1] Xie Shuling;Xie Linxi;Zhai Fengyan;Wang Ying;Yang Yongkang(Hainan Non-ferrous Engineering Investigation and Design Institute,Haikou 570100,Hainan,China)

机构地区：[1]海南有色工程勘察设计院,海南海口570100

出　　处：《岩土工程技术》2024年第6期740-744,共5页Geotechnical Engineering Technique

摘　　要：结合海南岛某建设工程场地岩土工程勘察成果,总结了琼北地区高阶地及火山岩台地局部分布的火山灰沉积土岩土参数特异性,探讨该类型特殊土岩土工程特性。通过现场钻探、标准贯入试验、波速测试及室内土物理力学试验、光释光测试、X荧光半定量全分析及矿物X射线衍射分析等,探讨其沉积成因、时代,提出基本工程特性参数建议值,为该类型土利用和地基处理提供依据,减少工程风险发生。A comprehensive geotechnical investigation was conducted at a construction project site on Hainan Island.Specific geotechnical parameters of volcanic ash deposits in high-order areas and volcanic rock plateaus in northern Hainan Island were summarized.The distinct engineering characteristics of this unique soil and rock type were investigated.A multi-faceted approach was employed,including on-site drilling,standard penetration tests,seismic velocity tests,laboratory soil physical-mechanical experiments,optically stimulated luminescence tests,X-ray fluorescence semi-quantitative analysis,and mineral X-ray diffraction analysis.The depositional origin and era of these deposits were examined.Furthermore,recommended values for fundamental engineering characteristic parameters were proposed,providing a solid foundation for the utilization and foundation treatment of this soil type,thereby reducing engineering risks.

关 键 词：轻质 火山灰 海湾泻湖沉积 海口软土 超高压缩性 高灵敏度和触变性 

分 类 号：TU41[建筑科学—岩土工程]