地铁联络通道冻结施工的三维数值模拟

3-D numerical simulation of frozen construction of a connected aisle in metro

冻结法在地铁联络通道施工中得到了广泛的应用,冻土墙的设计温度和厚度是工程安全的重要前提,为了直观了解冻土墙的力学特性,掌握联络通道内土体开挖对冻土墙的影响,保证工程的安全,对施工过程进行了三维数值模拟,得出了有价值的结论,并把计算结果与实测进行了比较,可供工程实践参考。

Frozen method is widely used in the connected aisle of metro. It is important to guarantee the safety of the connected aisle through the design temperature and thickness of frozen wall. In order to illustrate the mechanical behavior and grasp the influence of soil excavated inside the connected aisle on the frozen wall, 3-D numerical simulation of the process of the frozen construction is employed by the code for Flac3D. Considering the impact of excavation steps on the frozen wall, some valuable results which are available for other engineering, are obtained.