铁道科学与工程学报Issue(5)：96-99,4.
浅埋隧道塌方机理上限分析
Upper bou nd li mit analysis of collapse mechanis ms of the shallow tu nnel
摘要
Abstract
The prediction of the collapse mechanism in shallow circular tunnel is one of the most difficult tasks. Based on Hoek-Brown failure criterion and within the framework of upper bound theorem,the collapse mecha-nism of shallow circular tunnel was discussed in this paper.With the consideration of supporting pressure and pore water pressure,the energy dissipation of internal rock was calculated and analyzed,and the parameter ex-pression of the objective function of collapse surface was derived.Thereafter,the specific shape of collapse sur-face was plotted with different parameter values,and parametric study was conducted to estimate the effect of ev-ery parameter on the potential collapse mechanism.The results indicate that,with the increase of pore water pressure coefficient ru and parameter B,the scope of collapsing block decreases.However,with the increasing magnitude of parameters A and σt,the range of detaching block tend to increase.关键词
浅埋隧道/破坏机理/极限分析/Hoek-Brown准则Key words
shallow tunnel/failure mechanism/limit analysis/Hoek-Brown criterion分类
建筑与水利引用本文复制引用
严若明,周光裕,唐金,杨小礼..浅埋隧道塌方机理上限分析[J].铁道科学与工程学报,2014,(5):96-99,4.基金项目
国家自然科学基金资助项目 （）
