The tunnel goes through complex geological conditions in Maoba syncline, Tongmaling anticline and Lengshuihe shallow-buried section.
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。
2
Shallowburied and lowland laid pipelines, on account of their greater energy loss, are better to be insulated with hard polyurethane (Its insulation efficiency goes up to 86.3%).