【摘要】 随着隧道及地下工程的迅速发展,小净距隧道成为应用越来越广的隧道结构形式。由于地震是危害巨大的自然灾害,所以研究小净距隧道的动力响应,具有重大的工程价值和社会意义。本文拟采用有限元分析,对某小净距隧道入口段的偏压部分进行动力响应分析。本文在对其进行动力响应分析时做了如下工作:分析了该小净距隧道衬砌结构在水平方向和竖直方向地震波的激励下不同的响应特性;对比了偏压段左洞和右洞不同的受力情况;对该小净距隧道安全性进行了评估。本文得到的结果具有一定工程实际指导价值。更多还原

【Abstract】 As the rapid development of tunnel and underground projects, small clear spacing tunnel has gradually become the widely-used tunnel structural form. Because the earthquake is a cataclysmic natural disaster, it is of great engineering and social value to study the dynamic response of small clear spacing tunnel. In this article, the author used the Finite Element Method to analyze the dynamic response of the eccentrically-loaded parts at entrance section of small clear spacing tunnel, including the different response characteristics of the tunnel lining structure under horizontal and vertical seismic wave excitation, the different force conditions of left cave and right cave at the eccentrically-loaded section, and the safety assessment of this tunnel. The results can provide practical reference for similar projects.更多还原