钙质结核粘土地基的承载力特性和计算方法研究  

Research on characteristics and calculation methods for foundation bearing capacity of calcareous concretion clay

作　　者：徐松 Xu Song(Shanghai Investigation,Design&Research Institute Co.,Ltd.,Shanghai 200434,China)

机构地区：[1]上海勘测设计研究院有限公司,上海200434

出　　处：《工程勘察》2021年第3期32-35,共4页Geotechnical Investigation & Surveying

摘　　要：针对目前钙质结核粘土地基承载力理论研究手段单一且不够深入的现状,从传统的均质土地基承载力理论出发,采用理论分析方法研究了钙质结核粘土地基承载力升高的内在机理和决定性因素,同时探讨了钙质结核粘土静力触探试验比贯入阻力与内摩擦角之间的内在联系。在此基础上,依托江苏省北部某风电场升压站工程,利用比贯入阻力与内摩擦角的内在联系,改进传统的承载力确定方法。经现场原位试验验证,改进后的方法合理、准确,为富含钙质结核粘土地区的岩土工程设计提供了有益的参考和借鉴。According to the current status where the study on the bearing capacity theory of the foundation for calcareous concretion clay is single and not deep,The inherent mechanism and the decisive factors for the increase of foundation bearing capacity of calcareous concretion clay are studied by using theoretical analysis,which starts from the traditional theory of the bearing capacity of heterogeneous soil foundation.Meanwhile,the internal relationship between CPT specific penetration resistance and the internal friction angle in calcareous concretion clay is explored. On this basis of the internal relationship,the traditional calculation method of bearing capacity is improved through a wind power station project in Northern Jiangsu. It is proved by the in-situ tests that the improved method is reasonable and accurate,which provides a useful reference for the geotechnical engineering design in the clay area with the rich calcareous concretion.

关 键 词：钙质结核粘土 承载力理论 内在机理 方法改进 

分 类 号：TU470.3[建筑科学—结构工程]