摘要
针对地面出入式盾构隧道(ground penetrating shield technology,GPST)的地震动力响应规律进行研究。建立地面出入式盾构隧道的三维动力时程有限元模型。模型考虑上海场地的动力特性,合理模拟动力人工边界、管片纵缝和环缝,土-结构相互作用。分析隧道响应和场地响应,并对螺栓预紧力、纵向坡度、地面压重和顶部开洞等工况进行参数化分析。研究结果表明:地面出入式盾构隧道结构能在一定程度上放大地表加速度响应,大幅提高出露地表段的结构直径变形和加速度响应;提高螺栓预紧力、提高隧道纵坡度和增加地面抗浮压重板等措施可在一定程度上改善结构响应,但顶部开洞会显著放大隧道动力响应。
The seismic dynamic response law of ground penetrating shield technology(GPST)tunnel was studied.A three-dimensional dynamic finite element model of the ground-penetrating shield tunnel was established.The model took into account the dynamic characteristics of the Shanghai site and reasonably simulated the dynamic artificial boundary,the longitudinal and annular joints of the tunnel lining,and the soil-structure interactions.The tunnel response and site response were analyzed,and parametric analyses were performed for bolt preload,longitudinal slope,ground surcharge loading and top opening conditions.The results showed that the GPST tunnel structure could amplify the ground acceleration response,and the structural diameter deformation and acceleration response of the exposed surface section would be significantly increased.The results of the parametric analysis showed that increasing the bolt preload,increasing the longitudinal slope of the tunnel and setting a surface surcharge plate could improve the structural response;however,the top opening would significantly amplify the tunnel dynamic response.
作者
宗军良
饶倩
王祺
禹海涛
ZONG Junliang;RAO Qian;WANG Qi;YU Haitao(Shanghai Huangpu River Cross-river Facilities Investment Construction Development Co.,Ltd.,Shanghai 200002,China;Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China;State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China)
出处
《隧道与地下工程灾害防治》
2023年第3期63-70,共8页
Hazard Control in Tunnelling and Underground Engineering
基金
上海市科学技术委员会课题资助项目(18DZ1205100,18DZ1205101)。
关键词
地面出入
盾构隧道
地震响应
有限元模拟
参数分析
GPST
shield tunnel
seismic response
finite element model
parametric analysis
