Based on the advanced geology forecast by seismic reflection method at Tingzhou Tunnel in Ganzhou-Longyan Railway

fifty-seven selected seismic records are used for investigation. Within the segments of excited seismic wave in the surrounding rock

the differences of the shear wave velocity in horizontal and vertical directions are analyzed statistically

separately. Additionally

the anisotropy of surrounding rock is also considered. It can be seen from the results that when the shear wave velocities in horizontal direction vary from in vertical direction

shear wave anisotropy presences in different degrees in the surrounding rock. Vertical shear wave velocities are generally higher than the horizontal ones

and the most of shear wave anisotropy coefficients are within ±10%. It is found that the anisotropy coefficients of dynamic elastic modulus

dynamic shear modulus and dynamic Poisson ratio are in the ranges from -15% to 15%

from -20% to 20%

from -20% to 15%

respectively. The anisotropy degree of surrounding rock depends on the grade of surrounding rock

seismic longitudinal wave velocity and the buried depth of tunnel. The anisotropy coefficient of shear wave and its discrete degree are relatively higher

when the seismic longitudinal wave velocities are between 3 800 and 5 000 meters per second or when the buried depth of tunnel is between 60 and 100 meters. Among the tests conducted on the surrounding rock of grades Ⅱ-Ⅴ

it is noted that the shear wave anisotropy and its discrete degree is the highest in surrounding rock of grade Ⅳ

but is the lowest in the surrounding rock of gradeⅡ.