Statistical analysis on each water gushing point in traffic tunnel shows that large water gushing (>1000 L/s) appears in Yantang formation and Zagunao formation, but not in Baishan formation.

• 对辅助洞中各涌水点的统计分析表明：白山组中没有出现特大型(>1000L/s)的涌水点，涌水类型一般为直涌型；