流固耦合效应下PBA工法导洞开挖顺序数值分析研究  

Numerical Analysis Research on Pilot Tunnel Excavation Sequence with PBA Method Under Fluid-solid Coupling Effect

作　　者：曾恕辉 葛克水[2] 杨子奇[2] Zeng Shuhui;Ge Keshui;Yang Ziqi(China Railway 11th Bureau Group City Rail Engineering Co. Ltd. , Wuhan Hubei 430074, China;School of Engineering and Technology, China University of Geoseienees, Beijing 100083, China)

机构地区：[1]中铁十一局集团城市轨道工程有限公司,湖北武汉430074 [2]中国地质大学(北京)工程技术学院,北京100083

出　　处：《铁道建筑技术》2017年第11期80-83,共4页Railway Construction Technology

摘　　要：为了有效地预测在高水位地区PBA工法施工的风险,以北京市轨道交通14号线朝阳公园地铁车站为背景,利用FLAC^(3D)数值软件模拟了整个施工的过程。得到的主要结论为:(1)针对4种不同的导洞开挖顺序,在考虑地下水影响的情况下,通过对位移场的变化进行分析,得出"先开挖上部,上下交错开挖"为最优方案;(2)结合工程实际监测数据验证了工程的合理性,并提出了具体的改进措施,其结果可为后续的类似工程提供参考和依据。In order to effectively predict and Control the risk caused by PBA construction in high water level area, the FL^C3D numerical analysis software yeas used to simulate the whole construction process with the background of Chaoyang Park Station of Beijing Rail Transit Line 14. The main conclusions are as follows ： （ 1 ） Based on the analysis of the change of displacement field, the best excavation order is obtained for four different methods of the pilot tunnel with considering the influence of seepage. （2）Combined with the actual monitoring data, the rationality of the project is verified, and the con- crete improvement measures are put forward. The results could provide references for the later similar projects.

关 键 词：流固耦合效应PBA工法 导洞开挖顺序FLAC3D 

分 类 号：U231[交通运输工程—道路与铁道工程]