摘要
利用FLAC有限差分程序,模拟在近场强震作用下双孔并行地铁隧道的地震响应。分析其相对位移差峰值、水平向加速度峰值、水平向应力峰值随埋深及隧道间距径比变化而变化的特性。结果表明:埋深对与隧道的相对位移差、水平加速度及水平应力有显著影响,且随埋深增加显著增大;而距径比影响不明显,只有在距径比等于1时,隧道相对位移差出现峰值。
The seismic response of the two holes parallel subway tunnels are simulated in near-field strong earthquake by FLAC finite-difference procedure.Analyzing the changing characteristics of the peak of displacement difference,horizontal acceleration and stress as the changing of depth and the specific value of pitch and diameter,the results show that： the depth can observably influence displacement difference,horizontal acceleration and stress,and the influence will increase as the depth increases;the specific value of pitch and diameter is less functionary than depth,only when the value is equal to 1 can the peak of relatively displacement difference appear.
出处
《防灾科技学院学报》
2013年第2期1-5,共5页
Journal of Institute of Disaster Prevention
关键词
地震作用
并行隧道
埋深
距径比
earthquake
parallel tunnels
depth
specific value of pitch and diameter
