CT图像在岩土工程研究中的分析方法
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摘要
CT扫描技术是一门无损检测新技术,具有试验重复性强,数据提取连续好的优点,自引入到岩土工程领域以来,取得了不错的效果。介绍CT图像在岩土工程研究中的分析方法:直观分析法、CT数分析法、损伤增量法、CT图像三维重构法、统计频率分析法,分别就这5种方法进行分析,指出其特点和不足。最后,针对现有CT图像分析方法存在的问题,给出相关建议。研究成果对CT技术在岩土工程中的进一步有效运用具有促进作用。
CT scanning is a new nondestructive testing technology which has the advantages of strong repeatability and good data continuity. Great results have been achieved since it was introduced into geotechnical engineering. The analysis methods of CT image in geotechnical engineering were introduced, including intuitionistic analysis, CT number analysis, damage increment method, 3 D reconstruction of CT image and statistical frequency analysis. The 5 methods were analyzed respectively, and their characteristics and shortcomings were pointed out. Finally, aiming at the existing problems of CT image analysis methods, some suggestions were given. The research results can promote the further effective application of CT technology in geotechnical engineering.
CT scanning is a new nondestructive testing technology which has the advantages of strong repeatability and good data continuity. Great results have been achieved since it was introduced into geotechnical engineering. The analysis methods of CT image in geotechnical engineering were introduced, including intuitionistic analysis, CT number analysis, damage increment method, 3 D reconstruction of CT image and statistical frequency analysis. The 5 methods were analyzed respectively, and their characteristics and shortcomings were pointed out. Finally, aiming at the existing problems of CT image analysis methods, some suggestions were given. The research results can promote the further effective application of CT technology in geotechnical engineering.
引文
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[13] 万成. 基于X-ray CT和有限元方法的沥青混合料三维重构与数值试验研究[D]. 广州:华南理工大学. 2010.
[14] 樊成意, 梁收运. 土体SEM图像处理中阈值的选取[J]. 工程地质学报, 2012, 20(Sl): 718-723.
[2] 陈世杰, 赵淑萍, 马巍, 等. 利用CT扫描技术进行冻土研究的现状和展望[J]. 冰川冻土,2013, 35(1): 193-200.
[3] 张朝宗, 郭志平, 张朋, 等. 工业CT技术和原理[M]. 北京: 科学出版社, 2009.
[4] Jiang Hsieh. Computed Tomography: Principles, Design, Artifacts, and Recent Advances[M]. Bellingham: SPIE press, 2003.
[5] 叶云长. 计算机层析成像检测[M]. 北京: 机械工业出版社, 2006.
[6] 高上凯. 医学成像系统[M]. 北京: 清华大学出版社, 2000.
[7] 张全胜, 杨更社, 高广运, 等. X射线CT技术在岩石损伤检测中的应用研究[J]. 力学与实践, 2005, 27(6): 11-19.
[8] 卢再华, 陈正汉, 蒲毅彬. 原状膨胀土损伤演化的三轴CT试验研究[J]. 水利学报, 2002 (6): 106-112.
[9] 赵淑萍, 马巍, 郑剑锋, 等. 不同温度条件下冻结兰州黄土单轴试验的CT实时动态监测[J]. 岩土力学, 2010, 31(S2): 92-97.
[10] 丁卫华, 仵彦卿, 蒲毅彬, 等. CT技术应用于岩石实验动态观测的新进展[J]. 冰川冻土, 2000, 22(3): 218-222.
[11] 许彦卿, 丁卫华. 单轴条件下砂岩三维破裂过程的CT观测[J]. 工程地质学报, 2002, 10(1): 93-97.
[12] 刘增利, 李洪升, 朱元林, 等. 冻土初始与附加细观损伤的CT识别模型[J]. 冰川冻土, 2002, 24(5): 676-680.
[13] 万成. 基于X-ray CT和有限元方法的沥青混合料三维重构与数值试验研究[D]. 广州:华南理工大学. 2010.
[14] 樊成意, 梁收运. 土体SEM图像处理中阈值的选取[J]. 工程地质学报, 2012, 20(Sl): 718-723.