摘要
将围岩与衬砌结构看做整体承载结构,将围岩结构视为弹塑性体,结合工程实例,采用ABQUS非线性有限元软件,对Ⅳ、Ⅴ类围岩洞段进行模拟计算,从塑性变形的角度分析围岩稳定性并提出合理支护方案。模拟分析结果为:Ⅳ类围岩稳定性较差,支护处理后,顶拱塑性区基本消失;Ⅴ类围岩稳定性很差,必须进行超固处理。研究结果对同类型其他引水隧洞工程围岩稳定评价及支护设计具有一定指导意义。
Seeing the surrounding rock and lining structure as whole bearing structure,and the rock structure as elastic-plastic material,combining with project case,using nonlinear finite element software-ABQUS,the paper carries out simulation calculation for Class IV and V surrounding rock,analyzes rock stability and puts forward rational supporting scheme.The results are that the stability of IV is worse,after supporting,plastic zone of up-arch fades away essentially;the stability of V surrounding rock is quite worse,it is necessary to implement intensifying strengthening.The research results have certain guiding sense for stability valuation and supporting design of other tunnel projects.
出处
《南水北调与水利科技》
CAS
CSCD
2010年第5期153-156,共4页
South-to-North Water Transfers and Water Science & Technology
关键词
引水隧洞
围岩稳定
非线性有限元
diversion tunnel
stability of surrounding rock
the nonlinear finite element method
