本文简要说明了常用地下管线非开挖修复技术的基本概念、分类和特点,通过一个具体工程实例,介绍了采用原位固化法和涨圈法修复埋地排水管道的工程应用,并据此提出了一些建议性的结论以供参考。 This paper gives a brief account of the basic concepts, classification and characteristics of the commonly used trenchless repair technology of underground pipelines. By a concrete example, the engineering application of the buried drainage pipe repair by in situ curing method and upturn method is introduced. Some suggestive conclusions for reference.