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采用实用修改 Biot 模型,考虑土颗粒和孔隙流体的压缩性,建立了饱和土中弹性波弥散方程,进而利用数值方法全面探讨了饱和土中两种压缩波(P_1波和 P_2波)及一种剪切波(S 波)的波速和衰减与频率及饱和土参数(孔隙率、渗透性、流体粘滞性)的关系,给出了各种波的典型广义弥散曲线和衰减曲线。研究揭示了饱和土中三种体波的传播特性,对于岩土工程波动勘测技术及相关领域具有理论与应用价值。
The modified Biot model is applied to consider the compressibility of soil particles and pore fluids. The elastic wave dispersion equation in saturated soils is established, and then two kinds of compressional waves (P_1 and P_2 waves) and one The relationship between wave velocity and attenuation of shear wave (S wave) and frequency and parameters of saturated soil (porosity, permeability, fluid viscosity) is given. The typical generalized dispersion curves and decay curves of various waves are given. The study reveals the propagation characteristics of three kinds of body waves in saturated soils, and has theoretical and applied value for geotechnical fluctuating survey techniques and related fields.