Study On Mechanical Behave Of Metro Station For Three Parallel Tunnels Based On Shield Tunnel And NATM

The shield technology by its good characters against the leakage character,the safely&fast construction,small influence to the environment, has become more popular in the construction of metro tunnel. And the metro station base on the tunnel drivage by shield technology can make the construction more economily as the subway long distance that the shield dravaged.So the aricle put forward the metro station drivage method that with three parallel tunnels based in the shield tunnel with NATM.The article do the research to find the possibility and the rationality to this method through model experimentation and the math simulate in FEM. At present the single track metro shield tunnel diameter is 6m in our country,Also base on condition of the the Guangzhou NO.3 metro line,the article do the the study on mechanical behave of three parallel tunnels metro station based in the shield tunnel with NATM.First,find the most rational distance between the shield tunnel and the middle tunnel.Secont,do the research on the method to construct the three parallel tunnel metro station base on the shield tunnel through lab model experimentation and the math simulate in FEM,and find the best method to dive the middle tunnel.Third, do the research on mechanical behave of the liaison cross section between the shield tunnel and the middle tunnel through 3D-FEM.