长轴深井泵深大工作竖井围岩稳定性分析研究

深大竖井井筒开挖支护设计不仅关系到施工期间的人员机械运行安全,更是会直接影响到长轴深井泵式提水泵站后期的安全稳定运行。因此,工作竖井井筒围岩支护设计十分重要。本文充分利用迈达斯GTS NX岩土有限元分析软件及FLAC3D有限元两种计算分析软件的优点,对深大工作竖井井筒一次、二次支护进行分析计算,验证了一次支护措施的合理性,并对二次支护设计给出具体设计参数,对于现实的工程设计有较好的实践指导意义。

Analysis and Research on the Surrounding Rock Stability of Deep and Large Working Shaft of Long Shaft Deep Well Pump

The design of deep and large shaft excavation and support is not only related to the safety of personnel and machinery during construction,but also directly affects the safe and stable operation of the long-axis deep well pumping pump station in the later period.Therefore,the design of the surrounding rock support of the working shaft is very important.This paper makes full use of the advantages of Midas GTS NX geotechnical finite element analysis software and FLAC3D finite element analysis software to analyze and calculate the primary and secondary support of deep and large working shafts,verifies the rationality of the primary support measures,and provides specific design parameters for the secondary support design,which has a good practical guiding significance for the actual engineering design.