通过旋挖钻机在广州市轨道交通三号线北延段4标钻孔桩施工中的成功应用，充分证实了旋挖钻机性能的优越，但也经常出现一些问题。根据经验总结成孔中的注意事项以及施工中经常遇到的不良现象和预防措施，以便于在以后施工中有针对性地采取对策，更充分发挥旋挖钻机的优势。

The successful application of rotary drilling rigs in the bored pile construction in No. 4 contract section of the north extension part of line 3 of Guangzhou Metro fully confirms the superior performances of the rotary drilling rigs. The authors, on basis of their working experience, summarize the attention items and negative phenomena occurring in the boring construction and recommend some preventive measures. They hope this paper can provide reference for similar works in the future so as to make full use of the advantages of rotary drilling rigs.