隧道软弱围岩挤压大变形非线性流变力学特性研究  

RESEARCH ON LARGE SQUEEZING DEFORMATION AND ITS NONLINEAR RHEOLOGICAL MECHANICAL CHARACTERISTICS OF TUNNEL WITH WEAK SURROUNDING ROCKS

作　　者：孙钧[1,2] 潘晓明[1,3] 

机构地区：[1]同济大学岩土及地下工程教育部重点实验室,上海200092 [2]杭州丰强土建工程研究院,浙江杭州310008 [3]深圳市地铁集团有限公司,广东深圳518026

出　　处：《岩石力学与工程学报》2012年第10期1957-1968,共12页Chinese Journal of Rock Mechanics and Engineering

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.

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 

分 类 号：U45[建筑科学—桥梁与隧道工程]