饱和土动力响应中考虑水文地质性质的空间变异性

研究了土的动力响应，其中考虑了水文地质性质中孔隙率、渗透系数以及孔隙水体积模量等参数的空间变异性．对膨胀波（P波）在土中的数值研究是研究焦点．这些参数的变异性将通过Freeze提出的多变量概率密度函数来建立模型，通过M0nte-Carlo技术对土的动力特性进行研究．用数值方法说明水文地质性质的空间变异性对土的动力特性的影响．结果发现，由于散射及固有频率明显降低（它表明土实际上已软化）而引起的衰减中，孔隙率和孔隙水的体积模量的空间变异性将产生很重要的影响．

Consideration of Spatial Variation of Hydrogetechnical Properties in One-Dimensional Dynamic Response of Saturated Soil

Dynamic response of soil is studied by considering the spatial variation of porosity,permeability coefficient and bulk modulus of pore water,which are referred to as the hydrogeotechnical properties.Numerical study of the propagation of dilatational wave(P-wave) in soil is the focus of investigation.The variation of the parameters is modeled by multivariate probability density function proposed by Freeze,and the dynamic characteristics of soil are studied by Monte Carlo technique.The numerical scheme is utilized to show the effect of the spatial variation of the hydrogeotechnical properties on the dynamic characteristics of soil.The results show that,in the attenuation caused by scattering and clear lowering of the natural frequency,the spatial variation of porosity and bulk modulus of pore water will have important effects.