岩土力学2011，Vol.32Issue(11)：3420-3426,7.
南水北调西线TBM掘进下隧洞围岩损伤研究
Study of surrounding rock damage induced by tunnel boring machine driving tunnel at West Route of South to North Water Transfer Project
摘要
Abstract
The West Route of the South to North Water Transfer Project is taken as the engineering background and the excavation disturbed zone in surrounding rock of tunnel by tunnel boring machine (TBM) driving are studied. Considering the rock post-yield damage, a new constitutive model based on the cohesion weakening and frictional strengthening (CWFS) brittle model is proposed and is implanted to FLAC3D program by debugging dll in VC++. Based on the results of triaxial compression tests, this constitutive model is verified through parameter back analyzing by optimization algorithm such as neural network and genetic algorithm. The results show that the model can reflect the elastic characteristic, post-yield characteristic, brittle failure and post-failure residual strength characteristic of slate. Based on this model, the surrounding rock deformation characteristics, stress evolution law and damage characteristic of TBM driving of the South to North Water Transfer Project are studied and also compared with the results by Mohr-Coulomb constitutive model. Finally, the conclusion is drawn that the constitutive model proposed can better reflect the damage rule of the surrounding rock daring TBM driving, I.e. The damage develops along the weak zone.关键词
围岩损伤/隧洞掘进机模拟方法/CWFS损伤模型/损伤量Key words
damage of rock mass/the numerical simulation method of TBM driving/CWFS damage model/damage quantity分类
矿业与冶金引用本文复制引用
冷先伦,盛谦,何恩光,朱泽奇,赵羽..南水北调西线TBM掘进下隧洞围岩损伤研究[J].岩土力学,2011,32(11):3420-3426,7.基金项目
国家科技支撑计划课题子题(No.2006BAB04A06) （No.2006BAB04A06）
中科院方向性项目(No.KZCX2-YW-109-3) （No.KZCX2-YW-109-3）
国家科技支撑计划项目(No.2007BAF09B01). （No.2007BAF09B01）
