期刊论文

中文

矿冶工程

0253-6099

2012

32

5

7-10

国家自然科学基金（40802064）； 湖南省交通运输厅2009年度科技进步与创新计划项目（200925）；

本校为第一机构

根据某高速公路非对称连拱隧道衬砌结构形式,针对地表平、地表顺倾斜和地表逆倾斜等地表倾斜情况建立了相应的有限元分析模型,选取围岩稳定性、衬砌安全性和偏压情况等反映隧道稳定性的性能指标,采用数值模拟方法综合分析了不同地表倾斜情况下不同开挖方案对隧道稳定性的影响。结果表明,地表倾斜状况显著影响非对称连拱隧道围岩和衬砌的受力和变形情况,非对称连拱隧道地表平时应采用先大洞后小洞的开挖方案,地表倾斜时必须综合考虑地表倾斜情况和大小洞的跨度差异,才能合理确定开挖方案。非对称连拱隧道隧洞开挖时,先开挖一侧的围岩应力释放会引起另一侧未开挖岩体的竖向应力增大,导致另一侧岩体...

Based on the lining structure of asymmetric double-arch tunnels of an expressway, the corresponding finite element analysis model was established in terms of different conditions of ground surface （ being flat, upward inclined and downward inclined）. The stability of surrounding rock, safety of lining structure and bias pressure were selected as the performance indicator for tunnel stability. The impact of different excavation schemes on tunnel stability at different con- ditions of ground surface was comprehensively analyzed by digital simul...