Research on Building Deformation Caused by the Excavation of Subway Station

摘要

A database of 30 deep excavations of field monitoring on Nanjing subway stations is presented and discussed. In order to reflect the differences of settlement in different area around the excavation, monitoring points were arranged at three areas: the position 1/4 and 1/2 long side, or the long side of excavation for short; the width direction of excavation and the section within the range of 1/10 long side, or the short side of excavation for short; area of soil arching root. Research indicates that: The final pattern of ground surface settlement is groove shape. The deformation of excavation appears obvious three-dimensional characteristic. According to the subarea of ground surface settlement proposed and the relative location between the building and excavation, the deformation type and leaning direction of nearby building can be quickly predicted. These conclusions will be contributed to the future construction of subway stations, and can give effective protection to the buildings around the deep excavation.