复杂地质条件下大型地下洞室球冠状穹顶开挖施工技术

摘要

With the rapid development of strategic materials reserves engineering construction in our country, the vertical cavern project will be more and more. Most discrete reserves caverns are designed for three dimensional space structure, large cross section, and large⁃span flat dome with poor stability, difficult construction and low safety factor. This paper, combined with a large⁃scale underground reserves cavity engineering, using the finite element analysis software MIDAS/GTS to simulate dome excavation. And this paper researches and develops an excavation method for underground cavern spherical dome, which can provide a reference for similar projects.%伴随着我国战略物资储备工程的快速发展建设，立式洞室工程将会越来越多。大部分立式储备洞室设计为三维空间结构，断面大，大跨扁平穹顶稳定性差，施工难度大，安全系数低。本文结合某大型地下储备洞库工程，采用MIDAS／GTS有限元分析软件对穹顶开挖进行数值模拟，并研究开发一种地下洞室球冠状穹顶开挖方法，为类似工程提供参考。