冲击载荷下饱和砂土密实与排水过程的初步分析  

PRIMARY ANALYSIS ON PROCESS OF DENSIFICATION AND DRAINAGE OF SATURATED SAND UNDER IMPACT LOADING

作　　者：张均锋[1] 孟祥跃[1] 谈庆明[1] 俞善炳[1] 

机构地区：[1]中国科学院力学研究所,北京100080

出　　处：《岩石力学与工程学报》2000年第5期622-625,共4页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金;中国科学院重点资助! ( 195 72 0 68)

摘　　要：考虑液化后饱和砂土在重新固结时砂土骨架的压缩变形 ,对冲击造成液化的饱和砂土在排水与密实过程中砂面沉降速度、沉降量、超孔隙水压力等参数随时间的变化进行了初步的分析。在对液化后饱和砂土的渗透系数进行必要的修正后 。In consideration of compression deformation of sand skeleton during the reconsolidation of liquefied saturated sand, the changes of some parameters with respect to time in the process of drainage and densification of impact induced liquefied saturated sand are analyzed, such as the settlement velocity of sand surface, magnitude of settlement, excess pore water pressure, etc.. The permeability of saturated sand before and after liquefaction is quite different, the later should be larger (i.e. not Darcy′s k). The computing results are in close agreement to the measured results by modifying the permeability coefficient properly.

关 键 词：饱和砂土 液化 固结 冲击载荷 排水 密实 

分 类 号：TU441[建筑科学—岩土工程]