摘要
通过模型试验,考虑隧道有变形缝和无变形缝2种工况,研究逆断层黏滑错动下地层变形、隧道应变及隧道破坏特征,分析变形缝对跨断层隧道抗错断影响。结果表明:设置变形缝能有效改善隧道衬砌结构受剪能力。设置变形缝的隧道顶部最大纵向应变为未设置变形缝工况的约1/7,变形缝的存在能够有效减小衬砌最大纵向应变,改善应变的分布。设置变形缝隧道损伤程度明显轻于未设置变形缝隧道,破坏主要集中在破碎带范围内的变形缝附近的衬砌,衬砌节段部分未出现坍塌。
By means of model experiment,the effect of deformation joints on road tunnel resisting destruction by thrust fault stick-slip dislocation is analyzed. Considering two different cases(tunnel with and without deformation joints),we focus on the following characteristics caused by thrust fault stick-slip dislocation:ground deformation,strain of tunnel,failure characteristics of tunnel. The results show that deformation joints make tunnel liner avoid the direct shear force. The maximum longitudinal strain at the top of the tunnel with deformation joints is 1/7 of that without deformation joints. Deformation joints significantly decrease the maximum longitudinal strain in tunnel liner,improving the distribution of longitudinal strain. Deformation joints improve the failure mode of tunnel,making the degree of damage lighter than tunnel without deformation joints obviously. Tunnel sections do not collapse,the damage focuses on area nearby the deformation joints in the range of fracture zone.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2015年第S2期3837-3843,共7页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(51278377
51478342)
关键词
岩石力学
变形缝
公路隧道
逆断层
黏滑错动
模型试验
rock mechanics
deformation joint
road tunnel
thrust fault
stick-slip dislocation
model experiment
