The results show that mechanical behavior of lining structure change evidently when suddenly effluent water happen at inverted arch or foot of wall.

结果表明：突水位置发生在仰拱或墙脚位置时，对衬砌结构的受力影响显著；

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Lishi tunnel is the first loess multi-arch tunnel in China. The designs of the tunnel are briefly introduced, including lining structure, prevention drainage treatments and construction process.

离石隧道是我国第一座黄土连拱隧道，简要介绍了该隧道的衬砌结构、防排水处理、施工工序等的设计概况。

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Trickling water frequently occurs in the outside appearance of biconnected arch tunnels after the secondary lining, influencing their construction quality and operating.

在双连拱隧道施工中，二次衬砌完成后表面往往会出现渗漏水现象，对双连拱隧道施工质量及营运造成影响。

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