寒区隧道施工温度场与围岩局部崩塌关系的探讨  

Discussion on Relationship Between Temperature Fields of Tunneling in Permafrost Region and Fractional Wall Rock Falling

作　　者：汤国璋[1] 王星华[1] 

机构地区：[1]中南大学土建学院

出　　处：《矿冶工程》2005年第4期20-23,共4页Mining and Metallurgical Engineering

摘　　要：通过数值模拟分析,提出多年冻土隧道施工温度场的控制参数,根据工程需要,将多年冻土隧道的开挖施工划分为4个阶段安全施工阶段、相对安全阶段、安全预警阶段和安全隐患阶段,并指出各个阶段相应的工程措施,以尽可能降低施工风险。通过全方位监测隧道洞内温度场的变化,指导开挖和衬砌施工。After analysis by numerical simulation of temperature fields inside tunnel, some controlling parameters have been presented for temperature fields of tunnels in permafrost region. The project of excavating tunneling in permafrost region is divided into four phases （safe phase, relatively safe phase, phase with precaution in safety and phase with hidden safety problems） for sake of tunneling. Meanwhile measures corresponding to each phase of project have also been proposed, so as to reduce potential risk during construction as far as possible. The excavation and lining of tunnel can be guided based on controlling parameters by omnidirectionally monitoring temperature fields of the tunnel.

关 键 词：多年冻土 开挖 温度场 数值模拟 

分 类 号：TD353[矿业工程—矿井建设]