摘要
用改进的非连续变形分析(DDA)方法对某公路隧道进行了稳定性分析。采用有限元网格生成方法——行波法,在计算区域内自动生成三角形的DDA块体。块体的边界分为真实节理和虚拟节理,虚拟节理的强度取岩体的真实强度。另外,计算中还考虑了预应力锚杆对隧道围岩的加固作用。将计算得到的隧道拱顶、边墙的位移与现场监测结果进行了对比,两者基本吻合,说明改进的DDA方法在地下隧道的稳定性分析方面具有应有前景。
The stability of a twin-tube highway tunnel is analyzed using improved discontinuous deformation analysis （DDA） method By employing advancing front method, the triangular DDA blocks are automatically generated in the computational area. In this process, numerous artificial joints whose strength is higher than that of real joints come into being. In addition, the reinforcing effect of prestressed bolt on the surrounding rock is also taken into account. The numerical results are compared with the measured data, and they show pretty good agreement; therefore, it is shown that the improved DDA method is capable of analyzing stability of underground tunnels.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2007年第8期1710-1714,共5页
Rock and Soil Mechanics
基金
国家自然科学基金资助项目(50479071
40672191)
教育部留学回国人员科研启动基金资助项目(31410005450601)
湖北省人事厅留学回国人员科研启动基金资助项目(T000605)
作者简介
张秀丽,女,1979年生,博士研究生,主要从事岩石力学数值计算方法方面的工作.E-mail：cxlzhang@126.com.
