摘要
基于工程波动理论,应用ABAQUS数值模拟和理论解析方法,研究了溶洞中心与隧道中心处于同一水平时,埋深对岩溶隧道地震动力响应影响规律,并对比分析地震作用下有无溶洞时隧道的反应差异性.分析结果表明:岩溶隧道和非岩溶隧道发生较大位移的部位均为拱肩和拱脚;溶洞对隧道地震动有缓冲作用;岩溶隧道埋深越浅,地震动力响应位移越大;在地震作用下,隧道二次衬砌第一主应力较集中的部位是拱脚.埋深15 m时第一主应力最大,埋深100 m时第一主应力最小;埋深100 m时,岩溶隧道比非岩溶隧道的第一主应力小,说明溶洞对隧道岩体有一定的应力释放作用.
Based on the engineering wave theory, ABAQUS numerical simulation and theoretical analysis method are applied to study the influence rule of buried depth on the seismic dynamic response of karst tunnel when the karst cave center and tunnel center are at the same level, and the response difference of tunnels with and without karst cave under earthquake. The analytical results show that the large displacements of karst tunnel and non-karst tunnel occur at the arch shoulder and arch foot. The karst cave can buffer the ground motion of the tunnel. The shallower the buried depth of karst tunnel is, the larger the seismic dynamic response displacement is. Under the action of earthquake, the first principal stress of the secondary lining of the tunnel locates at the arch foot. The first principal stress is the highest when the buried depth is 15 m and the lowest when the buried depth is 100 m. When the buried depth is 100 m, the first principal stress of karst tunnel is smaller than that of non-karst tunnel, which indicates that karst tunnel has a certain stress release effect on tunnel rock mass.
作者
臧万军
贾晨浩
张国军
王峥峥
孙文涛
ZANG Wanjun;JIA Chenhao;ZHANG Guojun;WANG Zhengzheng;SUN Wentao(School of Civil Engineering,Fujian University of Technology,Fuzhou 350118,China;Key Laboratory of Underground Engineering,Fujian Province University,Fuzhou 350118,China;Faculty of Infrastructure Engineering,Dalian University of Technology,Dalian 116024,China)
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
2020年第1期36-45,共10页
Journal of Dalian University of Technology
基金
国家自然科学基金资助项目(51778109)
中铁二十四局集团福建铁路建设有限公司科研项目(GY-H-15034)
中交第四公路工程局有限公司科研项目(HT-PYGS-11-QT-2019-016-000)
关键词
埋深
岩溶隧道
动力响应
数值模拟
理论解析
buried depth
karst tunnel
dynamic response
numerical simulation
theory analysis
