铁道标准设计2025，Vol.69Issue(4)：119-128,138,11.DOI:10.13238/j.issn.1004-2954.202305240003
穿越断层带多破裂面隧道地震动力响应及设防分区研究
Research on Seismic Dynamic Response and Fortification Zoning of Tunnels Crossing Multiple Rupture Surfaces in Fault Zones
摘要
Abstract
The morphology and number of rupture surfaces in fault zones directly affect the seismic response characteristics of tunnels crossing fault zones.Based on a railway tunnel project crossing fault zones in a high-intensity seismic region in western China,a three-dimensional numerical model was established to investigate the relative deformation and stress response characteristics of tunnel cross-sections under seismic action when crossing different numbers of rupture surfaces in fault zones.Based on the relative deformation rate of the tunnel cross-section,a longitudinal seismic impact zoning method for tunnels crossing fault zones was proposed.Seismic mitigation and fault resistance measures,such as segmental linings,deformation joints,and damping layers,were implemented in the main impact zone.By comparing the cross-sectional relative deformation and peak structural shear forces of tunnels with and without these measures,the effectiveness of the zoning and mitigation measures was validated.The results showed that the number of rupture surfaces directly affected the relative deformation of the tunnel structure during an earthquake.The greater the number of rupture surfaces a tunnel crossed,the larger the peak deformation of the tunnel's cross-section became,though the affected sections on either side of the rupture surface became shorter.When a tunnel crossed multiple rupture surfaces,the cross-sectional deformation reached its maximum,with multiple extreme values occurring near the peak,representing the most unfavorable condition of seismic response.The research findings provide valuable references for the seismic fortification design in railway tunnels crossing fault zones in high-intensity seismic regions.关键词
铁路隧道/断层/多破裂面/影响分区/减震抗错措施/相对变形率Key words
railway tunnel/fault/multiple rupture surfaces/impact zoning/seismic mitigation and fault resistance measures/relative deformation rate分类
交通工程引用本文复制引用
张锴..穿越断层带多破裂面隧道地震动力响应及设防分区研究[J].铁道标准设计,2025,69(4):119-128,138,11.基金项目
中铁第一勘察设计院集团有限公司科研项目(2022KY17ZD(ZNJC)-01) （2022KY17ZD(ZNJC）
