摘要
运用岩石破裂与失稳过程分析RFPA^(2D)系统以及FLAC^(2D)程序对广州地铁二号线隧道通过电化教育学院录音楼引起建筑物桩基的变形与力学特性进行研究。RFPA^(2D)系统视材料为非均匀损伤材料,考虑修正后的Mohr-Coulomb准则(包含拉伸截断)作为单元破坏的强度判据,研究不同隧道开挖方式对建筑物桩基和地面移动的影响。分析表明,RFPA^(2D)系统是研究地表移动和破坏机理的适用工具。
With a newly developed numerical code, Rock Failure Process Analysis (RFPA2D), as well as numerical code FLAC2D, some numerical simulations of deformation and mechanical behaviors are made for a two-dimensional tunneling in the No.2 line tunnel of Guangzhou highway. By using the RFPA2D code, the model materials are considered as brittle and heterogeneous. The modified models of Mohr-Coulomb and tension cut-off are taken as the element failure criterion. Pile-base deformation and ground movement are inevitably caused by tunnelling construction in soil and rock ground. In urban areas, the potential effects on building are of great importance in the construction of tunnels by means of different excavating types. It is shown that the RFPA2D code is very promising to be used as a tool to study the ground movement and its failure mechanism.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2003年第5期735-741,共7页
Chinese Journal of Rock Mechanics and Engineering
基金
中国博士后科学基金
国家自然科学基金(49974009)
国家重点基础研究发展规划973资助项目(95-13-07-01)
关键词
隧道
开挖方式
建筑物
桩基
数值模拟分析
变形
tunneling engineering, RFPA2D code, FLAG2D code, pile-base of building, excavating types
