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。
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.
大跨连拱隧道受结构和跨度的影响，其初期支护与二次衬砌各自承受不同的围岩压力。
As the large spanned arch tunnel is influenced by the structure and span, the loads on initial support and secondary lining are different.
在连拱隧道施工中，中隔墙扮演着至关重要的角色。
During the construction of double-arched tunnel, the role of center pillar is of great importance.
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