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碾压膨胀土开裂规律及影响因素试验研究

DOI: 10.3969/j.issn.1674-0696.2015.03.13, PP. 63-66

Keywords: 道路工程,膨胀土,图像处理,干湿循环,开裂规律,roadengineering,expansivesoil,imageprocessing,dry-wetcycling,crackingrules

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Abstract:

:？运用计算机图像处理和编程技术，对不同压实度、初始含水率和干湿循环次数影响下膨胀土的表面裂隙的特征进行了描述和定量分析，探讨了压实度、初始含水率和干湿循环次数对膨胀土开裂规律的影响。结果表明：节点个数、块区个数、裂隙率和分形维数可以用来表征表面裂隙的开裂程度；随着膨胀土压实度的增大，裂隙的开裂程度减小；膨胀土的初始含水率为塑限含水率时开裂程度小于最佳含水率时的开裂程度；裂隙的开裂程度随干湿循环次数的增加而增大，裂隙相关参数的变化率呈减小的趋势，第1次干湿循环对膨胀土开裂的影响最大，第5、第6次干湿循环对开裂的影响甚微。

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