Research On Construction Method Of Deep&Big Shaft In Foling Tunnel

With the highway construction boom,the construction of the tunnel project,China is a mountainous country,is essential in the construction of the tunnel to the difficulty of deep shaft,shaft construction,construction is relatively complex.This paper collects the research achievements about the tunnel,introduces the domestic research situation about the deep shaft construction,design,construction and summarizes the characteristics of deep shaft structure and some of the current research results.This paper mainly aims at the actual engineering five glenoid highway Foling tunnel shaft,the shaft is difficult,complex structure stress,this paper mainly through theoretical analysis and field monitoring,on-site construction method to do research.According to the characteristics of deep shaft,take special research solutions and measures of construction made a detailed deployment,specially formulated shaft excavation,construction of initial support,making specific plan two lining,the blasting design,providing technology and experience for the same type of project.The application of finite element software ANSYS,establish the mechanical calculation model of deep shaft structure,the active earth pressure of structure is calculated by the ANSYS load,the internal force of the structure,and the safety of the structure were calculated,and provides safety assurance for structural safety,can provide a reference for the design and construction of similar projects.