昆明地区典型土层HSS模型参数与基本物理指标相关性分析  

Correlation analysis between HSS model parameter and basic physical indexes of typical soil layers in Kunming area

作　　者：杨伟锟 欧明喜[1] 高贵芬 黄建忠 YANG Weikun;OU Mingxi;GAO Guifen;HUANG Jianzhong(Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming Yunnan 650500,China;不详)

机构地区：[1]昆明理工大学建筑工程学院,云南昆明650500 [2]中国建筑第二工程局有限公司,北京100160

出　　处：《工业安全与环保》2023年第12期18-23,共6页Industrial Safety and Environmental Protection

基　　金：国家自然科学基金(51968036)。

摘　　要：以昆明地区基坑工程中3类典型土体(泥炭土、黏土和粉土)的土工数据为基础,针对基本物理指标开展正态性检验,分析了3类土体的一种HSS模型参数(参考切线模量E_(oed)_(ref))与基本物理指标的相关性,并建立相关回归模型。结果表明:①昆明地区泥炭土、黏土和粉土的压缩模量(E_(s0.1~0.2))均服从对数正态分布,参考切线模量近似服从对数正态分布;②泥炭土、黏土、粉土的参考切线模量与压缩模量的线性关系依次为0.85E_(s-泥炭土)、0.89E_(s-黏土)和0.86E_(s-粉土);③在不考虑压缩模量时,建立的泥炭土、黏土和粉土参考切线模量与密度、含水率、初始孔隙比的多元回归模型为:泥炭土E_(oed)^(ref)=w^(0.699)-^(1.902)e_(0)^(2.061),黏土E_(oed)^(ref)=w^(0.699)-^(1.935)e_(0)^(2.259),粉土E_(oed)^(ref)=w^(0.423)e_(0)^(2.034)。上述经验公式可为计算昆明地区泥炭土、黏土和粉土的取值提供参考。Based on the soil test data of three typical soils(peat soil,clay,and silt)in foundation pit engineering in Kunming area,this paper carries out normality test for basic physical indexes.Correlation analysis was conducted between an HSS model parameter(tangent stiffness for primary oedometer loading E_(oed)^(ref))and basic physical indexes for three soils.The results show that:①the compression modulus(E_(s0.1~0.2))of peat soil,clay,and silt in Kunming area follows lognormal distribution,and tangent stiffness for primary oedometer loading approximately follows lognormal distribution.②The liner relationship of tangent stiffness for primary oedometer loading for peat soil,clay and silt in Kunming area are 0.85E_(s-peatsoil),0.89E_(s-clay)and 0.86E_(s-slit)respectively.③When the compression modulus is not considered,it is established multiple regression model of tangent stiffness for primary oedometer loading of peat soil,clay and silt with density,moisture content and initial pore ratio,which can be expressed as E^(ref)_(oed)=w^(0.699)-^(1.902)e_(0)^(2.061)(peat soil),E^(ref)_(oed)=w^(0.699)-^(1.935)e^(2.2590)(clay)and E^(ref)_(oed)=w^(0.423)e^(2.0340)(silt).The above empirical equation can be used as a reference for calculating the tangent stiffness for primary oedometer loading of peat soil,clay,and silt in Kunming area.

关 键 词：小应变硬化模型 正态性检验 相关性分析 压缩模量 参考切线模量 

分 类 号：TU43[建筑科学—岩土工程]