地铁联络通道冻结区域力学特性分析

Analysis on Mechanics Features of Freezing Area in Metro Cross-passage

以上海市轨道交通5号线延伸工程盾构隧道联络通道冻结工程为依托,针对双线盾构隧道与联络通道和泵房组成的复杂空间结构,对冻结区域力学特性,采用PKPM进行理论分析;采用FLAC3D构建三维数值模型,进行数值模拟分析。结果表明,联络通道及泵房冻结施工阶段,冻结区域的应力安全系数满足规程要求,处于安全状态。

Depended on the freezing engineering of the connected aisle in the shield driven tunnel for Rail Transit Line 5 extension project in Shanghai City,according to the complicated space structure assembled by the double line shield driven tunnel,the connected aisle and pumping chamber,the theoretical analysis on the mechanical properties were conducted with PKPM;and the FLAC3D was applied to establish the 3D numerical simulation model and to have the numerical simulation analysis.The results showed that in the freezing construction stage of the connected aisle and the pumping chamber,the stress safety coefficient of the freezing area could meet the code requirements and was in a safety state.