摘要
应用极限分析上限法计算浅埋隧道围岩压力,构造了浅埋隧道围岩两种刚体平动破坏模式,并推导了理论公式。将浅埋隧道围岩压力计算转化为一个数学优化模型,编制相应计算程序。通过算例分析了两种破坏模式下浅埋隧道围岩压力计算结果,对照太沙基理论,对结果进行探讨,指出对于浅埋隧道而言,利用极限分析上限法计算隧道围岩压力是一个可行的方法。
The upper bound method of limit analysis is used for earth pressure calculation of shallow tunnel. Two rigid-block translational collapse mechanisms are assumed for shallow tunnel and the corresponding formulas are deduced. The earth pressure of shallow tunnel has been transformed into a mathematic optimization problem and the corresponding computer program was coded. Calculating examples for the two collapse mechanisms of earth pressure on shallow tunnel were conducted, the results of which were compared with those from Terzaghi theory. It is concluded that the upper bound method of limit analysis is a feasible approach for the determination of earth pressures on shallow tunnel.
出处
《工程力学》
EI
CSCD
北大核心
2008年第7期179-184,共6页
Engineering Mechanics
基金
国家自然科学基金项目(50308029)
关键词
浅埋隧道
围岩压力
极限分析
上限法
破坏模式
shallow tunnel
earth pressure
limit analysis
upper bound method
collapse mechanism
