摘要
针对广东省广惠高速公路小金口双连拱隧道和四川省宜水高速公路鞋底坡双连拱隧道2个工程,应用平面应变弹塑性模型,对双连拱隧道施工过程弹塑性进行了深入的有限元数值分析和模拟,提出了在隧道不同施工工序中塑性区的分布形式,通过这些塑性区的分析,指出了在施工过程中的围岩应力危险区域、围岩支护及监控量测的重点和难点,为施工提出了警示信息。
Based on the cases of the Xiaojinkou twin-arch tunnel of Guangzhou-Huizhou Highway and the Xiedipo twin-arch runnel of the Yibin-Shuifu Highway, the elastoplastic model of the plane stain is established and the elastoplastic behavior of the construction of the twin-arch tunnel is simulated and analyzed by the finite element. The distribution model of the plastic zones is put forward for the different execution procedures of the twin-arch tunnel. By analyzing these plastic zones, the dangerous zones of the surrounding rock masses and emphases and difficulty in the supporting and monitoring are pointed out.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2004年第z2期4946-4951,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
广东省交通厅科技项目(2002-14)
关键词
隧道工程
双连拱隧道
弹塑性有限元
数值分析
tunneling engineering, twin-arch tunnel, elastoplastic finite element, numerical analysis
