Research Of Hard Rock Tunnel By TBM And Drilling-blasting Method

Drilling-Blasting method is wide used in the traditional tunnel construction technology,the method of TBM tunnel construction technique is a new kind of construction technology,it is more efficient and get reliable guarantee of the construction safety,but its theoretical basis is not very mature,is advantage compared with the traditional Drilling-blasting method needs further research.In this article,through analyzing the basic principle of two kinds of method,uses FLAC3 D finite element software to analyze the different in-situ stress situations when a tunnel excavation of the two methods is different,the advantage of TBM method is proposed in the tunneling,this paper mainly studied through numerical calculation of two kinds of methods in different influence factors in the process of tunnel excavation,the main contents include:(1)Access to relevant data,to Drilling-blasting method and TBM method in tunnel construction is the basic principle,main rock fragmentation mechanism of the two methods,the deformation of surrounding rock,the surrounding rock stress concentration degree,the development of plastic zone of surrounding rock,wall rock strain energy density distribution is analyzed.(2)The finite element software FLAC3 D to a hard surrounding rock of deep buried tunnel under the two methods of rock tunnel excavation in the process of comparing analysis,puts forward the comprehensive evaluation index.(3)The finite element software FLAC3 D to a hard surrounding rock of deep buried tunnel during excavating tunnel drivage and larger principal stress axes line is at different angles of comprehensive analysis,mainly analyses the two methods under different in-situ stress conditions in the process of advancing the comprehensive index,points out the method of TBM in the dominant type tunneling process,provide sufficient theoretical basis for future engineering practice.