既有地铁站盾构机吊装结构加固分析

Hoisting Structure Reinforcement Analysis of Shield Machine in Subway Station

针对合肥火车站站前广场地下结构无法满足轨道交通1号线三期工程瑶海公园站至合肥站区间盾构机接收吊装时的荷载和位移要求的难题,采用609钢管对站前广场既有地下结构进行临时加固,基于ABAQUS数值软件模拟分析了吊装过程中加固后结构受力区域的应力和位移。结果表明:加固后,结构承载力变大,变形在允许范围内,所采用的加固方案可以达到预期目标。

In this paper,a reinforcement scheme is proposed to cope with the problems of load and displacement of underground structure when the shield machine hoisted in the rail transit line 1 between Yaohai Park and Hefei Railway Station.The 609 steel pipe is used to temporarily reinforce the existing underground structure in the station square.Meanwhile,by ABAQUS numerical software,the stress and displacement of the reinforced structure in the lifting process are simulated and analyzed.The results show that the bearing capacity of the structure has been improved and the deformation is in the allowable range.It can achieve the expected goal.