饱和散体振动液化的波动机理研究  

STUDY ON WAVE MECHANISM OF VIBRATING LIQUEFACTION IN SATURATED GRANULAR MEDIA

作　　者：吴爱祥[1] 孙业志[1] 黎剑华[1] 

机构地区：[1]中南大学资源环境与建筑工程学院,长沙410083

出　　处：《岩石力学与工程学报》2002年第4期558-562,共5页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(50074034)。

摘　　要：在有关假设条件下,给出了几个基本控制方程式,并得出了饱和散体中的波动传播方程。分析推导了波在无耗散情况下的势矢量方程和3种体波的速度表达式以及具有耗散情形的势矢量的普遍方程式和P波与S波的衰减系数。通过尾砂和铁粉矿的振动液化试验观察并记录振动液化时,饱和散体中孔隙水压力的变化情况,结果表明:随着振动的施加,孔隙水压力迅速升高,并表现出一定的波动性。利用波动理论和试验结果,详细分析了振动过程中饱和散体介质的3种体波的传播对孔隙水和颗粒的作用情况,揭示了孔隙水压力迅速升高和饱和散体液化的波动机理。Based on relevant assumptions,several governing equations are derived and the equation of saturated liquefaction in granular media is educed. The potential vector equation and the velocity expression of three kinds of body waves under the conditions of no dissipation,as well as the general equation of potential vector and the attenuation coefficients of P wave and S wave under the conditions of dissipation are deduced. By the vibrating liquefaction experiment of tailings and fine iron ores,the change of pore water pressure is observed and noted when the vibrating liquefaction takes place. With the infliction of vibration,the pore water pressure is increased with wave motion. Using the wave theory and experimental results,the influence of three body waves is analyzed in details on pore water pressure,and the mechanism of pore water pressure and the wave mechanism of vibrating liquefaction are revealed.

关 键 词：饱和散体 波动传播 振动液化 

分 类 号：TU441[建筑科学—岩土工程]