浅埋软土隧道蠕变问题的有限元分析  

FINITE ELEMENT ANALYSIS OF CREEP DEFORMATION OF SHALLOW EMBEDDED TUNNEL IN SOFT SOIL

作　　者：毕继红[1] 张玉芳[1] 常斌[1] 

机构地区：[1]天津大学 建筑工程学院,天津300072

出　　处：《低温建筑技术》2007年第1期95-97,共3页Low Temperature Architecture Technology

摘　　要：应用基于遗传蠕变理论的幂次关系蠕变方程,对浅埋软土隧道施工过程进行了二维粘弹塑性有限元分析。研究了隧道施工时围岩主应力、地表沉降、及支护结构内力随时间的变化规律,并与按弹塑性理论计算结果进行比较,说明了对软土区间隧道施工过程模拟中考虑土体蠕变特性的必要性。A nonlinear viscoelasto- plastic finite element model has been applied to simulate the 2D excavation process of shallow embedded tunnel. The exponential creep equation based on the genetic creep theory has been used in this paper. Based on the study of the time - dependent behaviour of the interaction between surrounding rock and lining structure, the main stress of surrounding rock,surface settlement and internal force of lining structure were obtained. The importance of creep theory in tunnel engineering has been proved by the contrast of two theories.

关 键 词：隧道施工 蠕变方程 粘弹塑性 有限元 

分 类 号：TU91[建筑科学—建筑理论]