铁道科学与工程学报2011，Vol.8Issue(1)：52-58,7.
基于多孔弹塑性模型的软弱泥质页岩隧道建模与模拟
Modeling and simulation in soft argillaceous shale tunnel based on porous elaso- plastic model
摘要
Abstract
On the basis of Cam - clay Model, a proposal constitutive model on porous elaso - plastic geo - material was derived for the argillaceous shale, which was porous and easy to decompose with water, and then the mechanical behavior in an argillaceous shale tunnel was simulated. According to the mix theory, the argillaceous shale was analyzed as a three -phase mixture coupling with solid -liquid -air, and the effective stress was introduced to set up a proposal constitutive model. The constitutive laws relate: the evolution of the constitutive effective stress with imposed solid matrix deformation, the degree of saturation with suction stress, and the relative flow vector with intrinsic pressure for the water and air phases. Based on the FORTRAN language, a Finite Element Method program was coded, with a material subroutine named POROSTONE for the argillaceous shale elaso -plastic model, and then a soft argillaceous shale tunnel was simulated. At last, a compared analysis was derived with the data in - situ. Some results are revealed as follows: the porous elaso - plastic model works well and are in good agreement with the measured data in- situ; the deformation velocity is fast during the prophase of the tunnel excavating, compared with the later, but the steady time is long; some assistant measures, especially the lock - foot anchor should be set to enhance the steady state due to the bigger compressive stress located at the arch foot of the two sides in the tunnel.关键词
泥质页岩/隧道/变形/剑桥模型/多孔介质Key words
argillaceous shale/ tunnel/ deformation/ cambridge clay model/ porous media分类
数理科学引用本文复制引用
胡波,黄林冲..基于多孔弹塑性模型的软弱泥质页岩隧道建模与模拟[J].铁道科学与工程学报,2011,8(1):52-58,7.基金项目
中国博士后科学基金面上资助项目(20090460827) （20090460827）
