基于数字图像测量的三轴土样变形测量方法综述  

Review on triaxial soil sample deformation measurement methods based on photogrammetry

作　　者：牟春梅[1,2] 吴浩杰 黄少染 周子良 MU Chun-mei;WU Hao-jie;HUANG Shao-ran;ZHOU Zi-liang(College of Civil Engineering and Architectural,Guilin University of Technology,Guilin 541004,China;Key Laboratory in Geotechmical Mechanics and Engineering,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]桂林理工大学土木与建筑工程学院,广西桂林541004 [2]桂林理工大学广西岩土力学与工程重点实验室,广西桂林541004

出　　处：《桂林理工大学学报》2021年第4期823-830,共8页Journal of Guilin University of Technology

基　　金：国家自然科学基金项目(41867039);广西自然科学基金项目(2020GXNSFAA297247);广西岩土力学与工程重点实验室项目(2015-A-01-03)。

摘　　要：针对在常规三轴试验中由于实验仪器和计算方法的限制无法实现土样变形准确测定的问题,将数字图像处理技术运用于土样三轴试验中,通过非接触式测量为三轴土样变形提供了更为准确的测量手段,为促进数字图像测量技术在土工三轴试验中的发展与应用,很有必要对现存的基于数字图像测量的三轴试验方法进行总结和梳理。在广泛阅读国内外相关文献的基础上,对目前具有发展前景的、在三轴土样变形测量中得以应用的3种数字图像测量方法(基于数字图形处理的三轴试验、基于数字图像测量系统的三轴试验、基于新型数字图像测量的三轴试验)进行了系统性总结,详尽地阐述了各测量方法的测量原理和局限性;通过不同测量方法的对比分析,揭示了基于数字图像测量的三轴试验在未来的发展趋势,针对不同的图像测量方法,提出了不同的改良方法。In the conventional triaxial test,due to the limitation of experimental instruments and calculation methods,it is impossible to accurately measure the deformation of soil samples.The close-range photogrammetry technology is applied to the triaxial test of soil samples.The non-contact measurement provides a more accurate means for the deformation measurement of triaxial soil samples.In order to promote the development and application of digital image measurement technology in geotechnical triaxial test,it is necessary to summarize and sort out the existing triaxial test methods based on digital image measurement.Based on extensive reading of relevant domestic and foreign literatures,this paper systematically summarizes the three digital image measurement methods(triaxial test based on digital graphics processing,triaxial test based on digital image measurement system,and triaxial test based on new digital image measurement).They have the development prospect and can be applied in the triaxial soil sample deformation measurement,by expounding the measurement principle and limitation of each method in detail.Through comparative analysis of different measurement,the development of the triaxial test based on image measurement in the future is presented,improved methods are proposed for different image measurement.

关 键 词：数字图像测量 土样变形 三轴试验 

分 类 号：TU41[建筑科学—岩土工程]