相关型岩土参数分析和选用  

Analysis and selection of correlational geotechnical parameters

作　　者：张润明[1] 郑文棠[1] 

机构地区：[1]中国能源建设集团广东省电力设计研究院,广州510663

出　　处：《岩土力学》2013年第7期1995-1999,共5页Rock and Soil Mechanics

基　　金：2011年中国能源建设集团广东省电力设计研究院院级科标项目(No.EV00711W)

摘　　要：岩土参数与应力环境、沉积条件、风化程度和埋藏条件等因素相关,其统计值具有空间变异性和相关性,采用非相关型岩土统计参数进行岩土工程设计具有不经济性。通过分析岩土参数的变化规律及与其相关的主要因素,说明岩土参数可用深度或参数与地层顶面或底面的距离作为相关参数进行相关型判别,论述相关型参数的判定标准和相关型标准值的计算方法,采用图解法分析相关型参数多种取值方法的可靠性。以华南某核电厂常规岛地基和某变电站边坡为例,介绍了相关型岩土参数标准值经验公式在岩土设计优化中的应用。分析表明:具有规律性变化的岩土参数宜选择恰当的相关参数划分为相关型,相关参数可取参数与地层顶面或底面的距离,相关型岩土参数标准值可使岩土设计方案更具合理性和经济性。Geotechnical parameters are closely related to the stress environment,sedimentary condition,weathering degree,buried condition and other factors.The statistical data of geotechnical parameters have high space variation and relativity.Sometimes,it is uneconomical to use the noncorrelative statistical parameters in geotechnical engineering analysis and design.The variation law and relevant key factors of geotechnical parameters are researched.The depth or distance from the test point to the bottom or surface of the layer could be correlational with geotechnical parameters.Besides,the criterion and formulas of correlational geotechnical parameters are provided;and the graphical method is used to study the reliability of different calculation methods.Finally,in the two cases of foundation design of conventional island in a certain nuclear power station and the slope desigh of a certain transformer station,the criterion and formulas of correlational geotechnical parameters are applied for optimization design.The correlation analysis shows that the geotechnical parameters varied regularly in the layers should be divided into the correlational type.The depth or distance from the test point to the bottom or surface of the layer could be the correlational parameters;the correlational standard values of geotechnical parameters are more reasonable and economic in geotechnical engineering analysis and design.

关 键 词：相关型参数 回归分析 标准值 可靠性 工程实例 

分 类 号：TU42[建筑科学—岩土工程]