TY -的A2,郝AU -李,东东盟——张Shaowei PY - 2021 DA - 2021/09/24 TI -含砂量和粒度的影响压实膨胀土的干缩裂缝SP - 7752352六世- 2021 AB -膨胀土干燥裂缝,这是一种常见的自然现象,对土壤的工程性质有显著的负面影响，是许多工程问题和地质灾害的直接原因。本研究旨在研究含砂量和粒径对压实膨胀土干燥裂缝的影响。首先，制备了5种含砂量、4种粒度组的压实膨胀土试样。然后，进行了一系列干燥试验。利用数字图像处理技术和分形理论，定量分析了蒸发过程中表面裂纹网络几何参数的动态变化。结果表明:裂纹扩展的早期和后期主要表现为裂纹长度和宽度的增加;沙子一样大小的粒子群(0.15、0.3毫米),随着含砂量(干重比土壤样本)从0%上升到40%,表面开裂比例(裂纹区域的比例的总表面积土壤样本)显示下降趋势(13.20%、11.42%、10.50%、8.98%和7.71%,分别)。在含砂量(40%)相同的情况下，随着含砂粒度组从[0.15 mm、0.3 mm)增加到[1.18 mm、2.36 mm)，表面开裂率也呈现下降趋势(分别为7.71%、7.69%、4.35%和3.73%)。裂纹分形维数的变化规律与表面裂纹比的变化规律一致。 During the drying process, the deformation of the sample was characterized by centripetal shrinkage or cracking, which were mainly affected by the boundary conditions of the sample. This research’s results verify the effectiveness of sand to improve the dry-shrinkage characteristics of expansive soil, providing a reference for the improvement of roadbeds and the treatment of soil slopes in expansive soil areas. SN - 1687-8434 UR - https://doi.org/10.1155/2021/7752352 DO - 10.1155/2021/7752352 JF - Advances in Materials Science and Engineering PB - Hindawi KW - ER -