3-D FLAC在公路隧道风机洞室稳定性分析中的应用

某大型公路隧道中的通风洞室结构复杂，洞室断面跨度较大、间距较小，因此，设计与施工过程的安全性与稳定性是工程难点，有必要采取有效的数值计算方法和计算模型，对洞室群进行详细的数值模拟分析。稳定性分析采用了目前较先进的三维快速拉格朗日分析（FLAC-3D）方法，该方法采用三维显式有限差分法程序，可较好地模拟岩土的三维力学行为。

3-D FLAC application in stability analysis of ventilator chamber of highway tunnel

Safety and stability are very important in designing and constructing complex ventilator chamber for its complex construction, large cross-section and little distance between chambers. It is necessary to adopt an effective and accurate numerical method and a calculation model to analyze underground tunnels. The advanced FLAC-3D method which based on 3-D explicit finite difference method, is adopted to calculate the ventilator chambers of a very long highway tunnel. The result indicates that the FLAC-3D method can be used to simulate three-dimensional mechanical behaviors of rock mass.