龙麟宫隧道是宜万铁路26座Ⅱ级风险隧道之一，全隧洞身位于灰岩地层，隧道洞身标高穿越垂直渗流带。隧道施工中揭示多处大型溶腔，介绍了隧道揭示的岩溶及发育特征，对两个特大型岩溶处理方案进行论述：DK232+467大型溶腔是中国铁路建设史上遇到的最大体积空腔，溶腔防护及施工难度极大，采用路基填筑+明洞结构通过；DK231+796溶腔大跨岩溶顶板处理难度大、施工风险高，创新地采用了立柱支顶防护进行顶板加固。两个特大型溶腔的成功处理，可为类似工程的处理开拓思路，积累经验。

Longlin Temple Tunnel is one of the 26 risk II tunnels on Yichang-Wanzhou Railway. The whole tunnel locates in limestone strata, and the standard height of the whole tunnel is through a vertical seepage zone. In construction process, several large caverns were revealed, whose karst and development characteristics were introduced, and the processing methods of two super-large karsts were discussed. DK232+467 is the biggest cavern in the construction history of China railways, and cavern protection and construction are extremely difficult. Subgrade filling and opencut tunnel were adopted. The large span roof of DK231+796 cavern is very difficult to process and its construction risk is high. Supporting columns were creatively used to support cavern roof. The successfully processing experience of the two super-large caverns will provide reference for similar projects.