柳州地区红土的工程特性和地震反应特性分析

Analysis of Engineering Characteristics and Seismic Response Characteristics of Laterite in Liuzhou Area

红土由于其特殊的物质组成和形成环境以及特殊的结构,通常会表现出不同于一般土的工程特征和动力学特性。通过总结前人研究成果,利用数值模拟的方法研究了柳州地区红土的工程特性、动力学特性以及地震反应特性。结果表明:①除液性指数外,各项物理性质指标的变异系数较小,较为稳定,各项力学性质的变异系数较大,较为离散;②柳州地区红土各项物理力学性质间相关性存在相关性进其中天然含水量、孔隙比、密度三者之间存在较为显著的相关性;③通过统计分析,给出了柳州地区红土土层剪切波速与埋深间相关系的推荐拟合模型,经过验证误差小于5%;④通过SOILQUAKE程序分析了不同动力学参数与实测值的差异,给出了建议值。这一工作对从事红土研究的工作者具有一定价值。

Due to its special material composition,formation environment and special structure,red soil usually exhibits engineering characteristics and dynamic characteristics different from ordinary soil.By summarizing the previous research results,the engineering characteristics,dynamic characteristics and seismic response characteristics of red soil in Liuzhou area were studied by numerical simulation methods.The results show that:Except for the liquidity index,the coefficient of variation of each physical property index is small and relatively stable,and the coefficient of variation of each mechanical property is large and relatively discrete.The physical and mechanical properties of red soil in Liuzhou area.There is a correlation between the natural water content,void ratio,and density.Through statistical analysis,this chapter gives the relationship between the shear wave velocity and the buried depth of the red soil in the Liuzhou area.The recommended fitting model of the related system has a verified error of less than 5%.The difference between the different kinetic parameters and the measured value is analyzed through the SOILQUAKE program,and the recommended value is given.This work is of certain value to workers engaged in red soil research.