介绍连拱式基坑支护工程设计与施工。
The paper introduces the design and construction of linkage arch foundation ditch support project.
单洞双层隧道作为一种新的隧道形式，不同于分离式隧道和连拱式隧道。
As a kind of new structure form, the single cavern and double layer tunnel is different from the separated tunnel and double-arch tunnel.
小净距隧道的主要特点是比分离式隧道占地少，比连拱式隧道造价低，造型美观；但施工难度大，技术含量高。
There are a great many of tunnels in high-grade highway, it is necessary to adopt the small clear distance tunnel.
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