摘要
为进一步提高强震区隧道洞口段衬砌结构的安全性,本文以樊家寨隧道芒市进口段为依托,利用有限元软件ABAQUS对强震区隧道洞口段采用“SFRC二衬+减震层”的刚柔并济抗震技术进行研究。结果表明:与仅采用素混凝土作为二衬结构材料相比,采用刚柔并济抗震技术后,二衬结构最大主应力极值减小了20.96%,最小主应力极值减小了12.42%,剪应力极值减小了11.82%,合位移极值减小了44.25%,最小安全系数提高范围38.15%~192.86%。研究结果可为强震区隧道洞口段的工程设计提供参考。
In order to further improve the safety of the lining structure at the tunnel portal in meizoseismal areas,this paper studies the rigid and flexible anti-seismic technology of"secondary lining of SFRC+shock-absorbing layer"for tunnel portals in meizoseismal areas with finite element software ABAQUS based on a case study of the portal section of Fanjiazhai Tunnel in Mangshi.The results show that compared with the practice of using only plain concrete as the secondary lining,the extreme values of maximum principal stress,the minimum principal stress,the shear stress,and the resultant displacement of the secondary lining structure are reduced by 20.96%,12.42%,11.82%,and 44.25%respectively,and the minimum safety coefficient rises by 38.15%to 192.86%after using the rigid and flexible anti-seismic technology.The results can provide a reference for the engineering design of tunnel portal sections in meizoseismal areas.
作者
蒋梦新
邱枫博
刘久明
崔光耀
JIANG Mengxin;QIU Fengbo;LIU Jiuming;CUI Guangyao(North China University of Technology,Beijing 100144,China)
出处
《高速铁路技术》
2021年第4期16-20,共5页
High Speed Railway Technology
基金
国家自然科学基金项目(52178378)
北京市大学生科学研究与创业行动计划项目(21XN216/006)。
关键词
隧道工程
强震区
洞口段
刚柔并济
抗震技术
tunnel engineering
meizoseismal area
portal section
rigid and flexible
anti-seismic technology
