【摘要】 以天津地铁三号线隧道衬砌与周围土体为研究对象,利用ANSYS有限元软件建立了三维有限元模型,重点分析了地下结构的抗震性能以及围岩加固方法的减震效果.结果表明:采用围岩加固方法对地下隧道进行加固,其抗震效果显著.当弹性模量一定时,加固层越厚,结构的受力和变形越小,减震效果越好;当围岩的加固厚度一定时,增加结构的弹性模量可以效减小衬砌结构的弯矩与剪力极值.更多还原

【Abstract】 This article takes the tunnel lining and surrounding soil of Tianjin Metro Line NO. 3 as research object and uses ANSYS to establish a three-dimensional finite element model accordingly. And then it mainly talks about the seismic constructions of underground structure and analyses the seismic effect of surrounding rock reinforcement method. The study indicates that effects of reinforcement measures of surrounding rock on seismic are remarkable. Under certain elastic modulus,the thicker the reinforced layers are made,the smaller the stress and deformation of the structure are formed. And when the thickness of reinforced surrounding rock is determined,the increasing elastic modulus can reduce the bending moment and shear of the lining structure.更多还原