人民黄河Issue(4)：115-118,4.DOI:10.3969/j.issn.1000-1379.2015.04.029
考虑松弛及蠕变特性的隧洞稳定性数值分析
Numerical Analysis on the Stability of Soft-Rock Tunnel Based on Rock Relaxation and Creep Property
摘要
Abstract
With the development of rock mass engineering,more attention are paid to long-term security and stability of tunnels. In this pa-per,on the basis of in-situ monitoring results and numerical simulation of a diversion tunnel,furthermore combining with relaxation theories and creep characteristics of soft rock,we analyzed the stability of this engineering project. The results show that the deformation mainly oc-curs in the top-arch,and it follows by the rule of“significant period”to“slow deformation stage”,then to“stability”. And to the soft rock tunnel,we find out that the creep characteristic of soft rock has a significant influence on the results of numerical simulation. Meanwhile,a-dopting creep constitutive model,and combining with relaxation,we explicitly confirm that the thickness of relaxation-zone has an obviously effective on simulation precision.关键词
软岩隧洞/蠕变/开挖松弛/稳定性分析/FLAC3D数值模拟Key words
soft-rock tunnel/creep/excavation relaxation/stability analysis/FLAC3D分类
建筑与水利引用本文复制引用
马鑫磊,任光明,夏敏..考虑松弛及蠕变特性的隧洞稳定性数值分析[J].人民黄河,2015,(4):115-118,4.基金项目
国家自然科学基金资助项目（41072229）。 （）
