摘要
借助电镜扫描分析手段 ,对Q3 震陷性黄土的微结构特征、颗粒形态等进行了分析 .结果表明黄土的显微结构对震陷系数有较大影响 ,并与震陷的临界动应力关系密切 .通过孔隙含量的定量测试分析 ,探讨了中大孔隙对黄土震陷影响 。
The seismic subsidence is one of major disasters in loess areas in China.The deformation mechanics of loess structure under earthquake loading are analyzed.By using electronic microscope scanning, microstructure and grain shape of Q 3 loess,which has seismic subsidence property,are studied.It indicate that the microstructure of loess has great influence not only to the seismic subsidence coefficient,but also to the critical dynamic stress.Through the quantitative test analysis of pore content, the influence of middle large pores on loess seismic subsidence is discussed and some items of loess samples' microstructure are compared and analyzed.
出处
《西北地震学报》
CSCD
北大核心
2002年第2期129-134,共6页
Northwestern Seismological Journal
基金
地震科学联合基金资助课题 (1990 4 4 )
科技部社会公益研究专项资助 (2 0 0 0- 35 )
中国地震局兰州地震研究所论著编号 :LC2 0 0 2 0 2 1
关键词
黄土
震陷性
微观结构
架空孔隙
Loess
Seismic subsidence
Microstructure
Overhead pore
