Abstract
For a practical engineering in which the tunnel of Subway Line No.7 between Guangqumen outside Station and Shuangjing station is down through Shuangjing Station of existed Subway Line No.10, numerical simulations of construction process of the tunnel have been investigated by FLAC 3D software and compared with site monitoring data. The sedimentation curves of the earth's surface along the cross-sectional and longitudinal direction are obtained, which show that all results including numerical simulation and site monitoring are accord with the data from the Peck formula. At the same time according to numerical computation, some relations between width and depth of excavating a tunnel are discussed. All these have important significant to theoretical research and engineer practice of subway construction.
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