基于流固耦合作用的单洞双层隧道导洞开挖顺序数值分析  

Numerical Simulation of Excavation Sequence of Heading of Single-tube Double-deck Tunnel Based on Solid-fluid Coupling

作　　者：杨子奇[1] 葛克水[1] 李皓[2] YANG Ziqi GE Keshui LI Hao(School of Engineering and Technology, China University of Geosciences, Beifing 100083, China School of Civil Engineering, Chongqing University, Chongqing 400044, China)

机构地区：[1]中国地质大学(北京)工程技术学院,北京100083 [2]重庆大学土木工程学院,重庆400044

出　　处：《隧道建设》2016年第10期1237-1244,共8页Tunnel Construction

摘　　要：为了有效地预测和控制单洞双层隧道施工引起的风险,以北京市朝阳区六里屯某商业办公项目的地下隧道工程为依托,采用数值模拟与现场监测数据相结合的方法,模拟整个施工过程。得到的主要结论有:1)针对2种不同的导洞开挖顺序,分别在考虑渗流与不考虑渗流情况下,通过对应力场、位移场和孔隙水压力的变化进行分析,得出最优方案;2)研究了渗流场对开挖引起的应力场和位移场的影响,并结合工程实际提出了具体的改进措施。The construction of a single-tube double-deck tunnel in Liulitun,Chaoyang District in Beijing is analyzed by numerical simulation and site monitoring data,so as to predict and control the construction risk. Some conclusions are drawn as follows： 1） The optimal heading excavation sequence is obtained by analyzing variation of stress field,displacement field and pore water pressure with / without consideration of water seepage action. 2） The influence of water seepage field on stress field and displacement field is studied. Finally,Some countermeasures are proposed.

关 键 词：导洞开挖顺序 单洞双层隧道 流固耦合 FLAC3D 

分 类 号：U455[建筑科学—桥梁与隧道工程]