摘要
卡杨公路茶地沟特长隧洞全长6 339 m,桩号MK24+684 m～MK24+711 m段发生塌方,该段围岩岩性为绢云母千枚岩,弱风化,围岩完整性和整体稳定性差,属Ⅳ级围岩,对隧洞施工人员和设备构成极大的安全风险。采取了有针对性的先"稳"再"固"后"锚"的紧急处理措施,防止塌方范围扩大,为后续施工打好了基础。
the Chadigou extra long tunnel of Kayang highway is 6 339 km long totally. Collapse at Chainage MK24＋684 m - MK24＋711 m occurs. The surrounding rock at this section is of sericite phyllite, which is weakly weathered and with poor integrity and overall integral stability. It is of the surrounding rock of Class IV and largely endangers construction personnel and equipment. Therefore, the emergency treatment measures are taken to this section on purpose： it is stabilized first, then consolidated and finally anchored. These measures pre- vent the section from collapse expansion and lay sound foundation for sequent construction activities.
出处
《西北水电》
2013年第2期15-18,共4页
Northwest Hydropower
关键词
特长隧洞
塌方处理
经验
extra long tunnel
collapse treatment
experience
