粘性土覆盖层下土中超孔隙水压力的动力试验研究  

EXPERIMENTAL STUDY ON EXCESS PORE WATER PRESSURE OF SOILS COVERED BY CLAY LAYER

作　　者：张之颖[1] 吕西林[1] 陈跃庆[1] 陈波[1] 李培振[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《岩石力学与工程学报》2003年第1期131-136,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金重点资助项目(59823002和50025821)。

摘　　要：以土-结构动力相互作用体系的模拟地震振动台模型试验为基础,考察了粘性土覆盖层下的粉土及砂土在模拟地震中的超孔隙水压力增长规律,及其震后的短期固结行为特征。分析了覆盖层下土体在地震中的超孔隙水压力发展特征机理,并探讨了影响超孔隙水压力发展的主要因素。Experimental study is made on soil-structure interaction by shaking table tests. The development of excess pore water pressure in sandy silt and medium sand covered by clay layer under simulated earthquake excitations, and their consolidation behavior shortly after the simulated earthquake excitations are studied. The development mechanism of excess pore water pressure in saturated sandy silt covered by clay layer is analyzed. In the end, some main factors are pointed out to affect liquefaction potential of the soil covered by clay layer.

关 键 词：粘性土 超孔隙水压力 动力试验 土力学 覆盖层 固结 影响因素 

分 类 号：TU472.31[建筑科学—结构工程]