Abstract: The Olympic Park Station of Beijing Subway Line 15 is located below the existing Datun road tunnel, with the roof in close contact to the floor of, and the alignment almost identical to, the existing tunnel. In order to study the influence of the construction of the subway station on the deformation of the Datun road tunnel, numerical method is employed to analyze the differences of different relative cross section positions between the station and the tunnel and different grouting areas. The results indicate that both the relative position and the grouting area pose obviously different effects on the tunnel deformation. The analyses may be helpful to the project or other similar projects in the future.

Key words: subway station, construction, existing road tunnel, relative position, grouting range, effect control, numerical analysis