基于结构安全的水工隧洞施工仿真系统研究

水工隧洞施工情况复杂，目前的施工仿真计算大多只考虑开挖而缺乏衬砌和灌浆因素，故没有体现隧洞完整的施工过程；施工动态仿真一般根据仿真结果采用预制动画的形式实现，其实现过程复杂，模型不易修改，隧洞施工过程中结构状况例如围岩稳定、锚杆等支护的安全难以直观地确定。考虑隧洞施工各个工序结合系统仿真的方法，调用开挖、衬砌及灌浆的CYCLONE模型得到更为准确的进度计划，基于BIM技术实现施工动态可视化。针对目前较少涉及隧洞结构安全与进度计划耦合仿真，提出基于映射概念与反馈技术的隧洞施工期结构安全仿真方法，基于二次开发技术与数据库技术，采用VB.NET+PYTHON语言编制了一套水工隧洞施工仿真系统，实现与工程施工进度相结合的结构安全判断，为工程师提供良好的数据支持。

Simulations of hydraulic tunnel construction based on the concept of structural safety

The construction of hydraulic tunnels is complicated. In the current construction simulation calculations, excavation process is mostly considered without the data of lining and grouting process, so these simulations cannot reflect the complete construction process of the tunnel. The dynamic simulation of the constructions uses prefabricated animation which is based on the simulation results, so its implementation process is complicated. Furthermore, this model is not easy to modify, and the structural conditions such as the stability of surrounding rocks and anchors during the construction of the tunnel are difficult to determine intuitively. In view of these problems, the method of tunnel construction in combination with system simulation was adopted in this paper, the CYCLONE model of excavation, lining and grouting was used to get a more accurate schedule, and construction dynamic visualization based on BIM technology was implemented. Aiming at the coupling simulation of tunnel structural safety and schedule which is rarely involved at present, a structural safety simulation method based on mapping concept and feedback technology was proposed for tunnel construction. Based on the secondary development technology and database technology, the combination of VB.NET and PYTHON language was used to compile a simulation system of hydraulic tunnel construction. This system can provide an overall structural safety judgment based on construction progress and support engineers with better data output.