大量工程实践表明,围岩较差的隧道开挖中不可避免地在支护与围岩之间存在一定超挖空洞。基于这一工程施工的具体问题,文章结合南水北调北京段某隧洞提出了一种用于隧洞超挖回填注浆的新方法,并具体阐述了该方法的施工工艺、重要环节以及关键问题等。最后,采用一些有效而又简单易行的检测方法对本次注浆效果进行检测,结果表明该方法是可行而有效的。 A large number of engineering practice shows that tunnel excavation with poor surrounding rock inevitably has some over-hollowing between support and surrounding rock. Based on the specific problems of this project construction, a new method for overburden backfilling grouting in tunnel with a section of Beijing section of South-to-North Water Diversion project is proposed in this paper. The construction process, important aspects and key issues of this method are described in detail. Finally, some effective and simple testing methods are used to test the grouting effect. The results show that the method is feasible and effective.