沈阳浅层粉质黏土承载力与浅基础地基承载力  

Research on Bearing Capacity of Shallow Silty Clay and Shallow Foundation in Shenyang

作　　者：孙峰[1] Sun Feng(Shenyang Geotechnical Investigation ＆ Surveying Research Institute, Shenyang 110004, Liaoning, China)

机构地区：[1]沈阳市勘察测绘研究院,辽宁沈阳110004

出　　处：《岩土工程技术》2016年第6期293-297,共5页Geotechnical Engineering Technique

摘　　要：以沈阳地区28个工程场地的工程地质资料和地基基础承载力资料为依据,采用统计回归的方法,对研究区域内浅层粉质黏土物理力学参数和承载力进行研究。并基于统一强度理论对太沙基理论进行改进,在其基础上建立了沈阳地区浅基础地基承载力经验公式。结果表明:研究区域内浅层粉质黏土物理参数的变异性小、相关性显著,力学参数的变异性相对较大、相关性不显著;浅层粉质黏土地层承载力与标准贯入实验值、旁压实验值以及土工试验参数和塑性指数与静止侧压力系数呈近似线性关系,地层承载力地域性经验公式和改进的太沙基理论基础上建立的沈阳地区浅基础地基承载力经验公式与实际承载力具有较高的符合性。研究成果可为区域性地基基础可靠性设计和承载力的确定提供必要的参考价值。Using statistical regression analysis, mechanical parameters and bearing capacity of the regional silty clay were studied based on engineering geology and bearing capacity data from 28 sites in Shenyang. Based on the unified strength theory to improve Terzaghi theory, the empirical formula of bearing capacity of shallow foundation in Shenyang area is estab- lished. The research show that： within the study area of shallow silty clay, the variation of the physical parameters is small, the correlation of the physical parameters is conspicuous, the variation of the mechanical parameters is large, and the cor-relation of the mechanical parameters is not conspicuous. There is a linear relationship among the standard penetration test values,lateral pressure test values,and soil test parameters values with the bearing capacity of the shallow silty clay, plastic index and static side pressure coefficient. The regional empirical formulas of bearing capacity and the bearing capacity formula of Shenyang area of shallow foundation to establish improved Terzaghi theory, and the actual bearing capacity have higher uniformity. The re- search results can provide necessary references for the reliable design of regional foundation and determination of bearing capacity.

关 键 词：粉质黏土 相关性 承载力 

分 类 号：TU431[建筑科学—岩土工程]