武广客运专线大瑶山一号隧道地质构造复杂，岩溶、裂隙、溶洞是大瑶山隧道的的重要特点。针对客运专线开挖断面大、防水等级高、质量要求严的特点，为了保证隧道衬砌内实外美，达到不渗、不漏、不裂和混凝土表面无湿渍的质量标准，结合工程现场实际，详细介绍围岩注浆、盲管、边墙基础、无纺布、防水板、排水体、止水带、二次衬砌混凝土及注浆等施工方法，由于在施工过程中非常重视初期支护防水和衬砌后进行注浆回填等，大瑶山一号隧道已基本达到一级防水要求。

No. 1 Dayaoshan tunnel on WuhanGuangzhou passengerdedicated railway has the particularities of complex geological conditions, including karsts, fissures and karst caves. The tunnel has such features as large excavation crosssection, high waterproofing requirement and high quality requirement. The tunnel lining is required to have solid body and good appearance, without seepage, leakage, crack and wet stain on concrete surface. The author presents the construction methods of surrounding rock grouting, blind ditch installing, sidewall foundation treatment, geotextile placing, waterproofing membrane placing, drainage material installing, water stop tie installing, secondary lining casting and backfilling grouting on basis of the actual conditions. Owing to the great emphasis on the waterproofing of the primary reinforcement and the backfilling grouting after secondary lining, No. 1 Dayaoshan tunnel has reached the first class waterproofing requirement.