基于层状岩体的横观各向同性特点,文章研究了层状岩体中隧道的地震响应规律。首先,综合隧道抗震计算自南场变形法和j维横观同性介质相速度的研究成果,推导Ⅲ了层状岩体中隧道抗震计算公式;其次,结合某层状岩体物性参数和隧道参数,以地震波入射角、岩层倾角和层面内与层面法向弹性模量比为变量,进行了大量的数值计算;最后,对比分析计算结果,得出了隧道响应规律及最大应变对应的1一况。
The seismic response law of tunnels in stratified rock masses is studied considering the characteristics of the transverse isotropy of a stratified rock mass. An aseismic calculation formula for a tunnel in a stratified rock mass is derived based on the free-field deformation method and results of research on phase velocity in a three-di- mensional transversely isotropic medium. A large number of numerical calculations are conducted based on the physical parameters of certain stratified rock masses and the variables of incident angle of the seismic wave, dip an- gle and ratio of the elastic moduli parallel and perpendicular to the rock stratum. The law of the tunnel's seismic re- sponse and the working conditions corresponding to the maximum strain are obtained by comparing the results of the analysis and calculations.