摘要
讨论高地应力条件下隧道软弱围岩发生挤压大变形的复杂力学行为,将挤压大变形归属为变形速率快而收敛速率慢的非线性流变变形范畴。在分析挤压大变形流变力学机制的基础上,分别提出非线性二维黏弹塑性本构模型和大(小)变形三维弹黏塑性本构模型,并进行相关专用程序的研发。运用所研发的材料子程序,对相关流变模型进行理论分析,就乌鞘岭铁路隧道软弱围岩施工开挖大变形问题进行工程应用研究。
： A complex mechanical behavior of large squeezing deformation of tunnel weak rocks is discussed under high ground stress condition. The large squeezing deformation can be belonged to the scope of a kind of large deformation rate with slow convergence. On the basis of rheological squeezing deformation＇s mechanism, a nonlinear 2D visco-elastoplastic constitutive model and a 3D elasto-viscoplastic constitutive model in case of large/small deformations are proposed respectively~ and the corresponding secondary development special softwares are studied. The developed material subroutines are applied to analyzing the squeezing problem which occurred in rock excavation for the Wushaoling railway tunnel project.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2012年第10期1957-1968,共12页
Chinese Journal of Rock Mechanics and Engineering
关键词
隧道工程
隧道软弱围岩
挤压大变形
非线性黏弹塑性本构模型
大(小)变形三维弹黏塑性本构模型
三维专用程序软件
tunnelling engineering
tunnel with weak surrounding rock
large squeezing deformation
nonlinearvisco-elastoplastic constitutive model
3D elasto-viscoplastic constitutive model in case of large/small deformations
3D special subroutines soRware
