摘要
用六节点曲边节理单元模拟复合式衬砌中间防水层,采用二维弹塑性静力有限元模拟某黄土隧道的开挖修建过程,分析了该隧道的静力稳定性。计算中用释放荷载法模拟开挖效应,采用Mohr-Coulomb屈服准则及关联流动法则,采用初始刚度迭代法求解平衡方程,对超过屈服点的应力进行调整。文中最后提出了抑制隧道围岩变形的技术措施,给出了隧道衬砌支护参数的建议。
In this paper, the composite lined intermedi ate waterproof layer was simulated by six node curve jointing unite.The process of excavation and construction of a yellow soil tunnel was simulated using engineering elastic-plastic static finite element, and the static stability of the tunnel was analyzed.The effect of excavation was simulated by load discharging method in calculation. The equilibrium was solved by initial stiffness iteration method according to the Mohr-Coulomb yield law and related flow rule.The technical measure restrained deformation of surround rock was proposed and suggestion for the parameter of tunnel lined supporting was provided in the finale of the paper.
出处
《工程质量》
2006年第9期50-52,共3页
Construction Quality
关键词
有限元法
黄土隧道
变形控制
支护参数
finite element, yellow soil tunnel, restrained deformation, parameter of supporting
