基于系统识别方法的围岩弹性模量及水平地应力反演分析  

The System Identification Method to Back Calculate the Elastic Modulus and Hrizontal Crustal Sress of Surrounding Rock

作　　者：李锐铎[1] 周海波[1] 朱存贞[1] 乐明静 刘恒[1] 周世康[1] 

机构地区：[1]河南城建学院交通运输工程学院,河南平顶山467036

出　　处：《数学的实践与认识》2014年第17期153-157,共5页Mathematics in Practice and Theory

基　　金：河南省科技攻关项目(0624450009);河南城建学院科研基金资助项目(2012JZD004)

摘　　要：利用有限元软件建立隧道开挖正演模型,基于新奥法隧道施工现场实测围岩收敛数据,采用灵敏度分析建立了参数调整算法,利用系统识别方法对隧道围岩弹性模量及水平地应力进行了反演分析,并讨论了初始值的影响.结果表明,系统识别反演分析法具有自适应能力强、反演分析过程收敛计算稳定性好和计算速度快等优点,在隧道及地下工程领域具有广阔的应用前景.The forward model of tunnel excavation was built using the finite element software combined with the measured data from the tunneling engineering of practical project using new Austrian. The elastic modulus of tunnel surrounding rock and the horizontal crustal stress were calculated with the system identification method. The inversion accuracy and initial value were analyzed and calculated. The results show that the system identification method to back calculate the elastic modulus of tunnel surrounding rock is effective and the inversion procedure has stronger adaptive control, good convergent calculation stability, rapid calculation velocity. It has broad application prospects in the field of tunnel and underground engineering

关 键 词：弹性模量 水平地应力 反演 系统识别 

分 类 号：U451.2[建筑科学—桥梁与隧道工程]