隧道开挖方式对建筑物桩基影响的数值模拟分析  

NUMERICAL SIMULATION ANALYSIS ON INFLUENCE OF TUNNEL EXCAVATION TYPES ON PILE FOUNDATION OF BUILDING

作　　者：芮勇勤[1] 岳中琦[2] 唐春安[3] 杨天鸿[3] 陆培炎 

机构地区：[1]长沙交通学院道路与交通工程系,长沙410076 [2]香港大学土木工程系 [3]东北大学岩石破裂与失稳研究中心 [4]广东陆仕岩土工程有限公司,广州510660

出　　处：《岩石力学与工程学报》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)

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.

关 键 词：隧道 开挖方式 建筑物 桩基 数值模拟分析 变形 

分 类 号：TU473.1[建筑科学—结构工程]