Abstract: During the design and construction process of double-arched tunnel,the role of center pillar is of great importance.Some illustrations of double-arched tunnel constructed recently in our country are listed.Several latest research of key-technology about structural type,appropriate parameter,construction technology and procedure as well as the watertight and drainage system of center pillar are analysed and generalized,which will guide the construction practice.

Key words: double-arched tunnel, center pillar, structural type, watertight and drainage system

摘要： 连拱隧道设计、施工过程中,中隔墙起着至关重要的作用。结合近年来国内公路连拱隧道建设的实例,分析总结了中隔墙的结构型式、合理参数选取及其不同施工工艺和工序对中隔墙受力性能的影响和连拱隧道中隔墙防排水系统等关键技术问题的最新研究成果,以指导建设实践。

关键词: 连拱隧道, 中隔墙, 结构型式, 防排水系统