摘要
结合大连地铁春光街车站工程,通过数值模拟方法,在隧道下穿既有运营桥梁过程中,首先在不进行围岩注浆加固的情况下,对比分析了"两台阶"、"三台阶"的开挖方法对桩基及承台的影响;继而在隧道内进行不同程度的加固条件下,对比分析了"两台阶"、"三台阶"的开挖方法对桩基及承台的影响;最后给出了适宜的洞内加固参数和开挖方法。
Numerical simulation was carried out based on the project of Chunguang Street Station of Dalian Subway. The tunnel went through beneath the existing bridge in service. Different excavation methods were compared. Firstly,the effects of two-bench and three-bench excavation on piles and platform were analyzed in the case of non-reinforced surrounding rock with grouting. Secondly,the effects were analyzed in the case of reinforced surrounding rock with grouting. Based on the comparison,appropriate parameters for inner reinforcement were proposed and proper excavation method was suggested.
出处
《铁道建筑》
北大核心
2016年第4期60-63,共4页
Railway Engineering
关键词
隧道施工
既有桥梁
洞内加固
位移
数值模拟
Tunnel construction
Existing bridge
Inner reinforcement
Displacement
Numerical simulation
