岩土CT图像中裂纹的形态学测量  

MORPHOLOGIC MEASUREMENT OF CRACK IN CT IMAGES OF ROCK AND SOIL

作　　者：尹小涛[1] 党发宁[1] 丁卫华[1] 陈厚群[1] 

机构地区：[1]西安理工大学岩土工程研究所,陕西西安710048

出　　处：《岩石力学与工程学报》2006年第3期539-544,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(10372078;10172071);陕西省教育厅专项科研计划项目(01JK139)

摘　　要：利用计算机层析成像(CT)技术提供的岩土体损伤破裂演化图像,定义每一点的CT数变化量为该像素点CT数与其后紧邻的同行像素点、其下紧邻的同列像素点的CT数差的绝对值中的较大值。根据CT数在扫描断面上的分布规律,设定了提取疑似裂纹区的像素点CT数变化量标准值ξ=20,进行了疑似裂纹区的检出操作。并对其上的几何信息和CT数信息进行了统计,接着定义了裂纹长度和宽度,利用该参数对裂纹尺寸进行了计算。该工作对于推动岩土工程CT图像定量化描述具有一定意义。Utilizing the evolution images of crack or damage in rock mass and soil offered by computerized tomography（CT） technology, the changing value of CT number at each pixel is defined to be the maximum of absolute value between the margin of the pixel CT number and that of the proximate pixels in the same row and column respectively. According to the distribution of CT number on scanning section, the changing criteria of CT number at pixels where ξ equals 20 are defined; and then the doubtful crack is obtained. Simultaneously, the geometrical and CT information in the region of crack is computed. Then the length and width of crack are defined and calculated. The work is important to advance the quantitative analysis of CT image in geotechnical engineering forward.

关 键 词：岩土力学 CT图像 裂纹 定量化 提取 几何测量 

分 类 号：TU45[建筑科学—岩土工程]