地震工程学报2017，Vol.39Issue(1)：80-87,94,9.DOI:10.3969/j.issn.1000-0844.2017.01.0080
基于Matlab和IPP的黄土孔隙微观结构研究
Study of the Microscopic Pores of Structured Loess Based on Matlab and IPP
摘要
Abstract
The pore structure is an important characteristic of loess that helps distinguish it from other soil types.The macroscopic mechanical behaviors of loess,such as its collapsibility and seismic subsidence,are closely related to its pore structure.In this paper,we develop a method combining Matlab and Image-Pro Plus (IPP)software to pre-process images of the loess micro-structure.Qualitative and quantitative analyses of intact loess samples taken from Xining in Qing-hai,Yongdeng,and Lanzhou in Gansu,Xiji in Ningxia,and Ruicheng in Shanxi are also per-formed at the microscopic level.Microstructural image processing is introduced,and a new meth-od to determine three-dimensional porosity based on gray scale calculation is proposed.Results in-dicate that the microstructure of the Q3 loess in different regions is closely related to the regional, depth,and climatic conditions.In qualitative analytical tests,loess particles in the area near and esat of Liupan Mountain were given priority to with grains and grume because of its rich rainwa-ter.The climate in the western region of Liupan Mountain significantly differs from that in the east;specifically,the western region is more arid and shows a smaller contact area between parti-cles and tendency to form trellis pores.In the test of quantitative analysis,the large pore content increases gradually from northwest to southeast in the space.Particles move closer to each other, and the distance between grains decreases with increasing depth from top to bottom;thus,the large pore content is gradually reduced.In-situ stress gradually increases,and loess particles and pores appear to rotate and deform because of squeezing with increasing of stratum depth.The el-liptical ratio of medium and large pores decreases,and macropores change significantly.The soil is remodeled,and an orderly pore arrangement is achieved.Pore size and area are relatively uni-form in each region,fractal dimensions and probability entropies decrease,and the rose curve is gradually smoothened.关键词
黄土/微观结构/matlab/IPP/孔隙Key words
loess/microstructure/matlab/IPP/pore分类
天文与地球科学引用本文复制引用
徐世民,吴志坚,赵文琛,赵涛..基于Matlab和IPP的黄土孔隙微观结构研究[J].地震工程学报,2017,39(1):80-87,94,9.基金项目
国家自然科学基金项目(41472297,51478444) （41472297,51478444）
