Research On Construction Technology Of Double Arch And Small Clear Distance Tunnel

In this paper, the research results of double arch and small tunnel construction are collected, and the design and construction method of double arch and small distance tunnel are introduced.Mainly for Dai Yunshan tunnel double arch tunnel and small clear distance section of the project, in the construction site is very difficult, force structure is very complex, and encountered in gas tunnel construction of some problems, through theoretical analysis and field test, construction technology of existing was improved. Application of finite element analysis software, using of double arch tunnel and small clear distance tunnel are studied by numerical simulation, and the change law of ground settlement and supporting stress were studied which were caused by excavation of left and right openings in the excavation process is studied. has been tunnel structure with the excavation of roof displacement, horizontal convergence and plastic zone development, obtained the conclusion can for similar engineering design and construction for reference.To solve the above problems, the causes and characteristics of the above problems, based on this, the research methods and measures, such as the impact of blasting vibration on the wall of the use of micro differential blasting, etc., in order to ensure the safety of the structure in the tunnel construction, and provide technical and experience for the same type of project.