中南大学学报（自然科学版）2025，Vol.56Issue(2)：637-650,14.DOI:10.11817/j.issn.1672-7207.2025.02.019
双向地震作用下跨断层破碎带隧道地震响应动力学试验研究
Dynamic experimental study on seismic response of cross fault fractured zone tunnels under bidirectional seismic action
摘要
Abstract
Through conducting large-scale shaking table tests,the dynamic responses and failure laws of surrounding rocks,tunnel structures,and NPR anchor cables of tunnels crossing fault fracture zones under the support of NPR anchor cables and horizontal and vertical seismic actions were studied.The results show that the fracture zone has an obvious amplification effect on seismic waves,and the worse the surrounding rock conditions are,the more obvious the seismic response is.Under the action of two-way earthquakes,the acceleration response of the model surrounding rock decreases with the increase of burial depth.At the deep foundation,the Z direction seismic wave response is significant,and the shallow X-direction seismic wave response is significant.Under the repeated tension and compression of two-way earthquakes,the vault of the tunnel is mainly affected by the Z-direction seismic action,the haunch of the tunnel is mainly affected by the X-direction seismic action,and the spandrel of the tunnel is mainly affected by the XZ two-way seismic action.Therefore,the tunnel structure shows a failure development mechanism of"spandrel—haunch—vault"under seismic action.After the seismic action,large deformation damage occurs at the spandrel of the tunnel,but no collapse occurs,indicating the large deformation performance of NPR anchor cables and their retaining ability for disaster-prone surrounding rocks.关键词
地震响应/振动台试验/NPR锚索/双向地震Key words
earthquake response/vibration table test/NPR anchor cable/bidirectional earthquake分类
交通运输引用本文复制引用
陶志刚,赵易,丰于翔,张晓宇,何满潮,毛玉铤..双向地震作用下跨断层破碎带隧道地震响应动力学试验研究[J].中南大学学报（自然科学版）,2025,56(2):637-650,14.基金项目
第二次青藏高原综合科学考察研究资助项目(2019QZKK0708)(Project(2019QZKK0708)supported by the Second Tibetan Plateau Scientific Expedition and Research Program) （2019QZKK0708）
