Abstract：The coseismic deformation field caused by fault dislocation has a significant impact on the safety of long linear projects, such as tunnels, crossing them. The distribution of the stratigraphic deformation at the engineering scale is an important design basis for such projects. Based on the dislocation model theory, the distribution of the stratigraphic coseismic deformation field in the range of the surface and the tunnel depth is obtained by combining the parameters of the stratigraphic model and the parameters of the finite fault model obtained from the joint inversion of multi-source data. Based on the calculation results, the differences in the displacement values and the distribution patterns of the isoseismic deformation field under the influence of different parameters are compared and the potential influence of the deformation direction in the stratigraphic deformation index on the structural forces is emphasized. The results show that the seismic isoseismic deformation field changes significantly with increasing depth from the surface to the interior of the strata and that the distribution pattern of the stratigraphic deformation changes from bending deformation-dominated to shear deformation-dominated. For the same amount of fault deformation, the deformation direction of a stratum has an important influence on the force of the tunnel lining in non-circular sections. Therefore, it is recommended that the relative burial depth of the structure at the location relative to the upper edge of the fault be treated as an important parameter in future seismic calculations for underground engineering; furthermore, the force should be calculated when the structure is at its most unfavorable deformation angle.
郭凯 赵伯明. 深埋隧道地层工程尺度下同震变形场研究[J]. 土木工程学报, 2021, 54(S): 104-112.
Guo Kai Zhao Boming. Co-seismic deformation field of deep buried tunnel strata at the structural scale. 土木工程学报, 2021, 54(S): 104-112.
