广州某矩形隧道下穿既有隧道设计与施工  

Design and Construction of Rectangular Tunnel Under-crossing Existing Tunnel in Guangzhou

作　　者：王世君[1] 叶雅图[1] 

机构地区：[1]广州地铁设计研究院有限公司,广东广州510010

出　　处：《施工技术》2010年第9期50-53,共4页Construction Technology

摘　　要：广州市珠江新城核心区市政交通项目旅客自动输送系统中央广场站～市民广场站区间隧道下穿既有金穗路隧道,下穿段采用矿山法施工。本段隧道直接下穿既有隧道,两隧道之间竖向无土层;且既有隧道设有抗浮锚杆,新建隧道也需考虑本身抗浮。综合考虑,创造性采用矩形直墙隧道。详细介绍了矿山法矩形隧道下穿既有市政隧道的设计参数及关键施工技术。实践证明,施工过程对既有隧道扰动较小,取得良好的社会和经济效益。Mining method is adopted in the under-crossing segment between Central Square Station and Civil Station in the automatic people moving system of municipal traffic project in core district of Zhujiang New Town in Guangzhou.And the tunnel under-crosses the existing Jinsui Road Tunnel without soil at vertical direction between the two tunnel lines.Furthermore,anti-floating anchors are set under the existing tunnel,and anti-floating problem should be considered during the new tunnel construction.Thus the new tunnel is designed as rectangular section.Design parameters and key construction technologies are introduced.It proves that the construction process has allowable influence on the existing tunnel,and good social and economical benefits can be gained.

关 键 词：隧道工程 矿山法 矩形隧道 下穿 设计 施工技术 

分 类 号：U455.41[建筑科学—桥梁与隧道工程]