hole enlargement

• 扩径

hole enlargement的用法和样例：

例句

1. Based on the analysis of the construction technology of secant piles in alluvium, the phenomenon of hole enlargement is studied.
   摘要通过分析冲淤沉积层的特点和套管咬合桩的施工工艺，对套管咬合桩在冲淤沉积层中的扩径现象进行研究。