冲击载荷下饱和砂土中流动和破坏的X光观测  

X-RAY OBSERVATION ON FLOW AND FAILURE OF SATURATED SAND UNDER IMPACT LOADING

作　　者：孟祥跃[1] 张均锋[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》2002年第6期803-807,共5页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金(19572068);中国科学院重点基金资助项目

摘　　要：介绍脉冲X光机和医用X光机的特性,应用这两种设备进行一系列饱和砂土的冲击加载实验。利用医用X光机拍摄到了饱和砂土在冲击载荷作用下产生的横断裂缝、纵向排水通道以及密实沉降的照片,得到了横断裂缝和纵向排水通道的出现规律,从而为研究饱和砂土冲击液化后结构破坏与密实沉降的机理提供了一种实验观测手段。The characteristics of pulse X-ray and medical X-ray machines are introduced. A series of impact loading experiments in saturated sand are carried out. By using medical X-ray machine,the photos of the horizontal cracks,longitudinal drainage pathways and settlement in saturated sand under impact loading have been taken for several times. And then,the appearance law of the horizontal cracks and longitudinal drainage pathways are obtained. As a result,an experimental observation means is provided to study the structure failure and settlement mechanism after the saturated sand is liquefied.

关 键 词：冲击载荷 饱和砂土 流动和破坏 沉降 X光 

分 类 号：TU441.5[建筑科学—岩土工程] O347.1[建筑科学—土工工程]