小间距地铁隧道设计思路  

Discussion on the Design of Neighborhood Tunnels

作　　者：苏晓峰[1] 

机构地区：[1]中铁第一勘察设计院集团有限公司,西安710043

出　　处：《铁道工程学报》2008年第8期89-92,104,共5页Journal of Railway Engineering Society

摘　　要：研究目的:本文从断面拟定、防排水、施工工艺、结构受力等方面,对广州市轨道交通3号线岗顶站至石牌桥站区间喇叭口隧道由双连拱隧道改为两座独立的小间距单线隧道施工的设计思路进行了介绍,重点对设计与施工中可能遇到的各种不利因素,从施工工艺、施工工序、支护措施等方面进行论述,阐明双连拱隧道改为两座独立的小间距单线隧道后施工的可行性、施工工艺的先进性以及防水设计的可靠性,为连拱隧道设计提供一个新的设计模式。研究结论:将双连拱隧道设计方案改为两座独立的单线隧道进行设计,即可缩短施工周期,又可提高防水的可靠性。通过对岗顶站至石牌桥站间施工过程的监控量测表明,在两座近距离单线隧道施工过程中,采用本文所述的施工工序和支护措施后,能够解决隧道施工过程中的围岩偏压、拱顶下沉等隧道施工问题。可为今后的类似工程提供借鉴作用。Research purposes： Through introducing the optimized design concept on the neighborhood tunnels in Gangding - Shipaiqiao section of Guangzhou Rail Transit Line 3 from the original design of double - arch tunnel for the variable small space section to separated tunnels, this paper focuses on the many unfavorable conditions, encountered in construction, describes the construction technique, process and support measures, and discusses the feasibility of changing the double - arch tunnel into separated tunnels and the reliability of waterproof for the purpose of providing a new design mode for design of double - arch tunnel. Research conclusions： Monitoring and measuring data during the construction of tunnels in Gangding - Shipaiqiao section illustrates that the new design concept and construction method not only can shorten the construction period and improve the waterproof property, but also can overcome the difficulties on unsymmetrical earth press and crown settlement of tunnels compared with the original double - arch structure. It provides references to similar works in future.

关 键 词：双连拱隧道 超小间距隧道 设计 隧道限界 施工工艺 全包式防水 

分 类 号：U452.2[建筑科学—桥梁与隧道工程]