隧道仰拱不同施作方法对结构受力的影响分析

Structural Response Analysis under Inverted Arch Tunnel in Different Construction Methods

某铁路双线隧道,为对比仰拱三次施作与一次施作对结构受力和围岩变形的影响,采用数值模拟对两种工况进行计算分析,根据计算结果,定性分析两种工况对围岩和结构的影响。结果表明,一次整体浇筑仰拱对初支结构的受力和围岩变形的不利影响较小,结果为类隧道施工可提供参考和借鉴。

Taking a double line tunnel as background and by using numerical simulation method, stress of the primary support structure has been carried on the calculation and analysis in the case of inverted arch construction in three steps and in one step. The influence of different inverted arch construction method has been analyzed qualitatively. Results show that, one-time overall construction of inverted arch has less adverse effect on the primary support structure, the results can be taking as a reference for Similar tunnel construction.