软弱泥岩引水隧洞TBM开挖有限元仿真与分析  

Finite Element Simulation and Analysis on Diversion Tunnel's Excavation by TBM in Weak Mudstone Area

作　　者：李怀珍[1,2] 戴永浩[3] 李小军[4] 

机构地区：[1]中国矿业大学矿业工程学院深部煤炭资源开采教育部重点实验室,江苏徐州市221116 [2]河南理工大学建筑与艺术设计学院,河南焦作市454000 [3]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071 [4]河南理工大学能源科学与工程学院,河南焦作市454000

出　　处：《矿业研究与开发》2014年第6期53-56,共4页Mining Research and Development

基　　金：国家自然科学基金资助项目(51108448;51274189;41204035)

摘　　要：采用弹塑性渗流-应力耦合有限单元法,对某大型输水隧洞TBM开挖过程进行了数值仿真计算与分析。计算中采用围岩应力释放技术,考虑开挖预留变形的影响,重点考虑了水头压力变化对围岩与管片受力与变形的影响。结果表明开挖过程中渗流场的变化将引起围岩较大的变形和管片受力的增加;预留变形的设计增加开挖量和围岩变形量,但可降低管片受力,有利于管片的受力和稳定。The elastic-plastic seepage and stress coupling FEM were adopted for numerical simulation calculation and analysis on a large diversion tunnel＇s excavating by TBM.The calculation on rock stress release technology and consideration on the influence of excavating reservation deformation,especially the influence of water pressure change on surrounding rock and segment＇s stress and deformation are included in the study.The results showed that the change of seepage field would lead to a larger deformation of surrounding rock and stress increase of segment.The design of reservation deformation increased the excavation volume and surrounding rock＇s deformation,however,reduced the segment＇s stress,which was good for segment＇s stress distribution and stability.

关 键 词：引水隧洞 TBM开挖 渗流-应力耦合 数值仿真 

分 类 号：TV554[水利工程—水利水电工程]