loess multi-arch tunnel 黄土连拱隧道
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。
Loess has the characteristics of structural properties, such as incomplete consolidation, collapsibility; and the multi-arch tunnel of highway has complex excavation steps and structure stress.
由于黄土具有结构性、欠压密性和土结构性受损易发生湿陷等特性，再加上会路连拱隧道施工开挖工序多，结构受力复杂。
The paper introduced the choice and construction process of loess multi-arch tunnel middle wall, analyzed monitoring and measurement of strengthening the middle wall for reference.
介绍了在黄土地区双连拱隧道中墙的选择及施工过程，并分析了如何加强对中墙的监控量测等。
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