该隧道穿越地质复杂的毛坝向斜、桐麻岭背斜和冷水河浅埋段。

The tunnel goes through complex geological conditions in Maoba syncline, Tongmaling anticline and Lengshuihe shallow-buried section.

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圆梁山隧道所处毛坝向斜存在高压富水，给隧道的设计与施工带来了很大的难度。

There is high pressure and abundant water in MaoBa syncline where Yuanliangshan tunnel lies, that brings a great many difficulties for design and construction of the tunnel.

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