地震荷载作用下沉管地基砂垫层液化的可能性

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英文篇名：Liquefaction possibility of immersed tunnel's sand ground under earthquake 中文刊名：自然灾害学报 英文刊名：Journal of Natural Disasters 作者：冉申德 ; 钟辉虹 ; 肖宏彬 英文作者：RAN Shen-de1 ; ZHONG Hui-hong2 ; 3 ; XIAO Hong-bin3(1.Bureau of City Engineering and Gardening of Guangzhou Municipality ; Guangzhou 510060 ; China ; 2.Guanzhou TunnelDevelopment Company ; Guangzhou 510130 ; China ; 3.Hunan University of Technology ; Zhuzhou 412008 ; China) 中文关键词：沉管隧道 ; 地震响应 ; 砂土液化 英文关键词：immersed tube tunnel ; seismic response ; sand liquefaction 出版日期：2007-02-28 机构：广州市市政园林局,广州市隧道开发公司,湖南工业大学 广东广州510060,广东广州510130,湖南工业大学,湖南株洲412008,湖南株洲412008 年：2007 期：01 出版单位：自然灾害学报

摘要

以广州仑头—生物岛沉管隧道为背景,采用二维动力有限元模拟方法,分析了地震荷载作用下沉管隧道地基的动力响应,得到了地震荷载作用下地基土的动剪应力分布;通过对试验资料的分析,得到了沉管隧道地基砂垫层的抗液化剪应力,以此分析了沉管隧道地基土在地震荷载作用下的液化可能性,并提出了相应的抗液化措施,可供沉管隧道的抗震设计参考。
Taking Luntou-Shengwudao immersed tube tunnel in Guangzhou as an example,the paper analyzes the seismic response of the immersed tube tunnel by dynamic FEM.According to these models,the dynamic shear stress distribution of ground of the immersed tunnel is calculated.By analyzing the experiment data of the site,the liquefaction-resistant shear stress of the sand ground is obtained.Thus the possibility of sand ground liquefaction of the immersed tube tunnel is analyzed so as to give reference to future design and construction of immersed tube tunnel.

引文

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