摘要
以白须公1号隧道为背景,运用有限元程序MIDAS/GTS模拟了隧道穿过特大溶洞时分台阶开挖的施工过程,分析了隧道在有溶洞条件下的施工力学行为,为关键部位加强支护提供理论依据。分析结果表明:该溶洞围岩自承能力较好,隧道衬砌连接处会出现应力集中,施工过程中要确保支护结构的整体稳定。
Based on the excavation of Baixugong No.1 tunnel,a numerical analysis concerning the construction process of the tunnel crossing a especially big limestone cave is carried out by using the MIDAS/GTS software system,analyzing the construction mechanics behavior of tunnel under the condition of karst cave,and provide theoretical basis for reinforcing support in key position.The results of numerical modeling show that the self-bearing ability of the karst cave is well,and stress concentration appeared on the connection of supporting structure,so to ensure the overall stability of supporting structure in the process construction.
出处
《广东公路交通》
2011年第2期56-58,61,共4页
Guangdong Highway Communications
关键词
溶洞
隧道开挖
施工力学行为
数值分析
karst cave
tunnel excavation
construction mechanics behavior
numerical analysis
