摘要
武广客运专线新南岭隧道出口段需穿越200余米充填粘土夹块石岩溶,采取预加固和预支护措施进行岩溶充填物处理势必需要大量的时间,造成工期延误及经济损失。为了保证工期及施工质量,采用了迂回导洞,既达到了地质预报的目的,更实现了长距离不良地质段多工作面施工、规避工期延误风险的目标。通过实际验证,使用这一方法确保了新南岭隧道的按期贯通。最后提出迂回导洞主要起到了超前地质预报和增加施工工作面、避免工期延误的作用。文章从隧道出口岩溶涌泥、地表塌陷灾害情况和充填岩溶分布探测确定出发,论述了迂回导洞总体方案、实施及效果。
The exit of the Xinnanling tunnel of the Wuhan-Guangzhou passenger-dedicated rail line passes through a karst area full of clay and fragmented stone that measures more than two hundred meters. Pre-reinforcement and ad- vance support methods are time-consuming and usually result in construction delays and economic losses. In order to guarantee the construction schedule and quality, a circuitous drift heading was adopted, which allowed for geological forecasting and multi-face construction for the section characterized by adverse geological conditions. This paper de- scribes the general planning, implementation, and effects of circuitous drift heading in terms of mud gushing, surface subsidence, and detection of karst full of clay and rubble at the tunnel exit
出处
《现代隧道技术》
EI
北大核心
2013年第1期146-149,共4页
Modern Tunnelling Technology
关键词
隧道施工
不良地质
迂回导洞
Tunnel construction
Adverse geology
Circuitous drift heading
