蠕变地层深埋隧道结构长期受力状态研究  

Study on Long-term Stress State of Tunnel Structure in Creep Stratum

作　　者：宋仪 乔春生[2] 朱举 SONG Yi;QIAO Chunsheng;ZHU JU(China Railway Sixth Survey and Design Institute Group Co.,Ltd,.Tianjin 300308;School of Civil Engineering,Beijing Jiaotong University,Beijing 100044)

机构地区：[1]中铁第六勘察设计院集团有限公司,天津300308 [2]北京交通大学土木建筑工程学院,北京100044

出　　处：《现代隧道技术》2020年第S01期343-350,共8页Modern Tunnelling Technology

摘　　要：文章通过对新近系泥岩的蠕变试验获得泥岩的蠕变特性和流变力学参数,对中条山隧道泥岩段的衬砌结构长期受力进行了数值分析,重点研究了隧道衬砌内力随时间的变化规律,以及不同埋深对隧道结构长期内力的影响。结果表明,隧道衬砌内力随时间增加而增加,作用在隧道衬砌上的压力随隧道的埋深增加而增加。建议对于处于蠕变地层中的隧道,设计时不应该简单照搬隧道设计规范,应该进行专门的蠕变分析。In this paper,through the creep experiment of the Tertiary mudstone,the creep characteristics and rheological mechanical parameters of the mudstone are obtained.The numerical analysis of the long-term stress on the structure of Zhongtiaoshan tunnel mudstone section is carried out,with the emphasis on the change of the internal force of the tunnel lining with time and the influence of different burial depth on the long-term internal force of the tunnel structure.Finally,it is concluded that the internal force of tunnel lining increases with time,and the pressure on tunnel lining increases with the depth of tunnel.It is suggested that the design of tunnel in creep stratum should not simply copy the design code of tunnel but carry out a special creep analysis.

关 键 词：蠕变地层 隧道结构 长期受力 深埋隧道 

分 类 号：U451[建筑科学—桥梁与隧道工程]