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通过室外数码成像的方法,记录不同含水量下膨胀土表面裂隙的开展过程,在AutoCAD平台基础上,用AutoLISP语言编写处理程序对裂隙开展过程的分维特征进行实时处理,结果表明自然状态下膨胀土裂隙开展过程中,裂隙的分形维数与含水量的相关性较好,分维的变化可有效反映膨胀土干缩裂缝的形态结构和膨胀土胀缩过程的变化趋势。同时,试验结果也表明使用自动化统计的措施可大大提高科研工作的效率。
The outdoor digital imaging method was used to record the development of cracks on the surface of expansive soil under different water contents. On the basis of AutoCAD platform, the processing procedures were programmed by AutoLISP to deal with the fractal dimension of fractures in real time. The correlation between fractal dimension and water content of fractures is good during the development of soil fissures. The fractal dimension changes can effectively reflect the morphological structure of shrinkage cracks and the trend of expansion and shrinkage of expansive soil. At the same time, the test results also show that the use of automated statistical measures can greatly enhance the efficiency of scientific research.