无压隧洞多采用圆拱直墙形断面。
Free-flow tunnel used more round arch straight wall form cross-section.
目前，国内外对连拱变厚度曲中墙隧道施工过程中围岩和支护的变形及破坏机理的研究成果很少。
There are few research achievements about deformation and damage mechanism for double-arch tunnel with thickness-changing curved middle-wall at home and aboard.
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。
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.
应用推荐