摘要
应用奥地利大型岩土工程有限元分析系统FINAL研究了软弱夹层分布部位(拱顶、拱肩、边墙)对地下洞室围岩稳定性以及喷锚支护结构受力性状的影响。数值试验研究采用FINAL中独有的模拟接触面的COJO单元,该单元能够准确地反映软弱夹层在地下洞室开挖过程中的力学特性;数值试验成果对地下洞室的选址、支护结构的设计以及施工设计等具有广泛的借鉴意义与指导作用。
Systematic numerical tests have been carried out tostudy the stability of surrounding rock mass with different distributions of weak interbed （crown zone, shoulder zone and wall side zone）, and the safe status of the supporting system has also been analyzed by the FEM program FINAL introduced from Austria. COJO element, a perfect element to simulate the weak interbed characteristics, has been used in all tests. Some quantitative results on influence of weak interbed respectively at crown, right shoulder and right wall are summarized, especially the displacement, stresses in surrounding rock, plastic region, and inner force in shotcrete. The results will be devoted to layout, supporting system design and construction of underground openings.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第18期3252-3257,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(50479023)
西安理工大学"三重"基金项目
关键词
岩石力学
软弱夹层
地下洞室
围岩稳定
数值试验
rock mechanics
weak interbed
underground opening
stability of surrounding rock mass
numerical tests
