摘要
为了研究能合理反映围岩稳定性的本构模型,利用现阶段国内外流行的FLAC3D软件对某隧道进行开挖模拟,得到了围岩在不同本构模型下的位移变化规律和塑性区范围分布规律,在变形机理研究基础上对两种本构模型计算结果进行了对比分析,并与实测结果进行对比,主要结论如下:(1)应变软化模型围岩位移变化量和塑性区范围都明显大于摩尔-库伦模型模拟的结果;(2)应变软化模型模拟的结果与实测值更为吻合,能真实的反映隧道围岩在开挖时的破坏特征。
The simulation of excavation on the surrounding rock of tunnel as carried out using the software FLAC3 D. During the simulation,the Mohr-Coulomb model and the Strain-Soft model were used. This simulation offers tunnel vault subsidence,horizontal convergence in the boundary wall and plastic zone of surrounding rock. The calculation results of two constitutive models are compared and analyzed,and the results are compared with the experimental Results. The main conclusions are as follows：（ 1） Strain-softening model of surrounding rock displacement and plastic are significantly larger than area of Mohr-Coulomb model results.（ 2）Strain-softening model simulation results agree well with the measured values,can truly reflect the failure characteristics of surrounding rock in the excavation of the tunnel.
出处
《河南城建学院学报》
CAS
2016年第3期15-19,共5页
Journal of Henan University of Urban Construction
关键词
围岩稳定性
FLAC3D
对比分析
本构模型
surrounding rock stability
FLAC3D
contrastive analysis
constitutive model
作者简介
曹日跃（1991-），男，安徽合肥人，硕士研究生。
