复杂地质条件下大型调压井关键施工技术数值仿真优化分析

结合四川岷江福堂水电站调压井工程，运用ANSYS结构有限元软件，在全面考虑调压井井周岩体预固结灌浆和灌浆孔锚筋索预加固技术、井口锁口圈梁加固、井身开挖围岩喷锚支护、整体倒挂砼衬砌和钢板衬砌等关键施工程序的基础上，对本工程调压井井口开挖裸露高度和井身开挖裸露高度等关键施工技术方案进行了数值仿真优化分析，并应用数值仿真优化成果，开展了调压井施工全过程的数值仿真及监测反馈分析，结果表明：计算成果有效指导了调压井工程的安全施工，且对类似工程有很好的参考价值。

Numerical Modeling on Key Construction Schemes of Large-scale Surge Tank under Complex Geological Conditions

Using ANSYS software, this paper conducted numerical simulation and optimization on key constructional techniques, such as the height of excavated bare surface at the mouth of surge tank, advanced consolidation grouting of surrounding rock, grouting hole anchor line forecast fasten technical, lock collar beam fasten at the pit bank, the support pattern of pneumatically placed concrete and anchor prop, whole overhang concrete lining and steel lining and so on for Futang surge tank in Minjiang river, Sichuan province. The paper also makes numerical emulation of the whole progress and monitoring feedback analysis. This has not only guided the safe construction of the project but also has provided good references to other projects alike.