摘要
In this paper, quantitative study on the microstructure of loess is done based on the study of seismic subsidences of the Yongdeng M_S5.8 earthquake in 1995. Using SEM and image processing techniques, a comparison analysis on the microstructure of loess is done and distribution curves of loess pores are obtained. Based on laser grain analyzer test and trellis structure changes under earthquake effect, the dynamic properties of loess are explained. At the same time, pore distribution of loess from seismic zone and non-seismic zone is compared. The result shows that the pore distribution features of different meizoseismal zones are different, and even that loess at the similar depths has substantial differences, too.
In this paper, quantitative study on the microstructure of loess is done based on the study of seismic subsidences of the Yongdeng Ms5.8 earthquake in 1995. Using SEM and image processing techniques, a comparison analysis on the microstructure of loess is done and distribution curves of loess pores are obtained. Based on laser grain analyzer test and trellis structure changes under earthquake effect, the dynamic properties of loess are explained. At the same time, pore distribution of loess from seismic zone and non-seismic zone is compared. The result shows that the pore distribution features of different meizoseismal zones are different, and even that loess at the similar depths has substantial differences, too.
基金
theNationalNaturalScienceFoundationProjectofChina(50379049)
ContributionNumberoftheLanzhouInstituteofSeismology.LC20050019.
关键词
地震
地质灾害
微结构
图像处理
定量分析
Earthquake disaster
Microstructure of loess
Image processing
Quantitative analysis
