摘要
采用CD法对浅埋小净距公路隧道在不同开挖顺序下进行施工力学数值模拟。通过对不同开挖顺序时的围岩位移和应力进行分析和比较,数值结果表明:在采用CD法施工时,不同的开挖方式最终位移和应力相差不大。综合考虑开挖过程中围岩应力和位移可知,采用先封闭先行隧道,再开挖后行隧道远离先行隧道侧的开挖方式较为适宜。
The numerical simulation of construction sequence was studied for shallow embedded tunnels by CD method.The displacement and stress of surrounding rock were analyzed and compared for different excavating sequences.The results show that the final stress and displacement of surrounding rock is close to each other.The best excavating sequences is enclosing the tunnel first excavated,then excavating the second tunnel side which away from first tunnel.
出处
《交通科技》
2010年第1期54-57,共4页
Transportation Science & Technology
关键词
CD法
开挖方案
小净距隧道
数值模拟
CD method
excavation scheme
small spacing tunnel
numerical simulation
