摘要
以九岭山隧道DK1685+645断面作为典型断面,通过应力解除法结合弹性力学理论公式推算得出该断面处洞壁切向应力为43.808 MPa,侧压力系数为0.757。控制侧压力系数不变,并以该应力作为初始应力场的基准值,采用数值模拟方法对该断面处初始应力场进行反演分析。计算得到该断面处竖向初始应力为20.500 MPa,水平初始应力为15.519 MPa。计算结果可为具有相近埋深与岩性的隧道岩爆预测提供参考。
Taking DK1685+645 section of Jiulingshan tunnel as a typical section,the tangential stress of the tunnel wall at this section is 43.808 MPa and the lateral pressure coefficient is 0.757 by combining stress relief method with elasticity theory formula. The control lateral pressure coefficient was unchanged,the stress was taken as the reference value of the initial stress field,and inversion analysis of the initial stress field at the section was carried out by numerical simulation method. The vertical initial stress and horizontal initial stress were calculated to be 20.500 MPa and 15.519 MPa at this section respectively. The calculation results could provide a reference for rock burst prediction of tunnels with similar burial depth and lithology.
作者
金辉
宋梦阳
谭力豪
全晓娟
田志宇
JIN Hui;SONG Mengyang;TAN Lihao;QUAN Xiaojuan;TIAN Zhiyu(Key Laboratory of Transportation Tunnel Engineering of Ministry of Education,Southwest Jiaotong University, Chengdu Sichuan 610031,China;Sichuan Provincial Transport Department Highway Planning,Survey, Design and Research Institute,Chengdu Sichuan 610041,China)
出处
《铁道建筑》
北大核心
2019年第9期57-60,共4页
Railway Engineering
基金
国家自然科学基金(51878571,51578456)
关键词
铁路隧道
反演分析
数值计算
初始应力场
应力解除法
railway tunnel
inversion analysis
numerical calculation
initial stress field
stress relief method
