摘要
运用宏观等效与微观分析相结合的手段从理论上研究土-石多相复合介质的波动传播特性。在宏观上将多相土-石复合介质等效为均匀各向同性的连续介质，然后利用微观理论模型中的Gassman方程、颗粒接触理论、等效流体模量等求得土-石复合介质的等效体积模量和等效剪切模量。将等效模量代入宏观等效模型便可得土-石多相复合介质的波速理论公式。该波速公式中反映出多相土-石复合介质的纵横波传播速度与介质的干密度、土石比、含水量、深度、石料粒径以及饱和度相关，通过理论计算获得其相互之间的关系曲线和拟合表达式。计算出的关系曲线显示，除粒径对波速几乎没有影响外，其他因素对波速影响明显。并具有较好的规律性。
Based on macroscopic equivalent model theories and the microscopic analytical theories, the properties of wave propagation in the polyphase soil-stone mediums are studied. The effective bulk modulus and effective shear modulus of the polyphase soil-stone mediums are derived by using the equivalent fluid model, particulate contact theory, and Gassmann＇s equations. Then, the theoretical calculation formulae of wave velocity are proposed by assuming that the polyphase soil-stone medium is made of a homogeneous, isotropic, and linearly elastic material containing polyphase soil-stone composite medium. The theoretical calculating results show that the wave velocity has close relation with dry density, soil-stone ratio, water content, depth, saturation degree, and grain diameter of polyphase soil-stone medium.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第A01期4917-4923,共7页
Chinese Journal of Rock Mechanics and Engineering
基金
重庆市交委重点科技项目（20020320）
重庆市教委科技基金项目（20010121）
关键词
岩土力学
多相土-石复合介质
等效模量
波速
rock and soil mechanics
polyphase soil-stone composite mediums
effective modulus
wave velocity
