摘要
深部岩体的力学特性不同于浅部岩体的力学特性,深埋巷道的结构形式是否合理对结构的承载能力和经济效果有很大影响。运用有限元方法,对五心拱、三心拱、1/2圆拱、圆拱、1/3圆拱和1/4圆拱模型的深埋单轨和双轨巷道在不同应力情况下进行数值计算,分析巷道周围的应力场和塑性区。计算结果表明,单轨巷道宜采用1/4圆拱模型,双轨巷道宜采用1/4圆拱或三心拱模型。
The mechanical behaviors of the deep rock masses are different from those of the shallow rock masses.Shapes of deep have great effects on the stability of deep tunnel and supporting design.Six types of the one-line and double-line deep tunnels are studied under different stress situations by using the finite element method(FEM).The stress field and plastic zone around the tunnel are obtained.On the basis of the magnitude of the plastic zone,the optimal shape of deep tunnel is determined.It is shown from the numerical results that the quarter-circular arch model is suitable for one-line tunnel.It is found from the numerical results that the three-center arch model and the quarter-circular arch model are suitable for double-line tunnel.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2006年第z1期2700-2706,共7页
Chinese Journal of Rock Mechanics and Engineering
基金
国家科技攻关计划"西部开发科技行动"重大项目(2004BA901A02)
关键词
数值分析
深埋巷道选型
单轨巷道
双轨巷道
numerical analysis
shape selection of deep tunnel
one-line tunnel
double-line tunnel
