Abstract The appropriate selection of an excavation scheme is important for controlling the deformation of the deep foundation pit of a subway station approaching an existing railway. Using the foundation pit engineering of the Qianhaiwan station of Shenzhen Metro line 11 as a background, and considering the interaction of the soil mass, retaining structure and support system, a 3D numerical model is established by finite element software to carry on a dynamic study of the two excavation schemes, i.e., the open-cut bottom-up method and the cover-and-cut topdown method. The results show that the latter is more effective for controlling the deformation of the retaining structure while the bending moment and shearing force produced by the retaining structure is larger. This research provides essential theoretical data support for excavation schemes of deep foundation pit construction.
Abstract：
The appropriate selection of an excavation scheme is important for controlling the deformation of the deep foundation pit of a subway station approaching an existing railway. Using the foundation pit engineering of the Qianhaiwan station of Shenzhen Metro line 11 as a background, and considering the interaction of the soil mass, retaining structure and support system, a 3D numerical model is established by finite element software to carry on a dynamic study of the two excavation schemes, i.e., the open-cut bottom-up method and the cover-and-cut topdown method. The results show that the latter is more effective for controlling the deformation of the retaining structure while the bending moment and shearing force produced by the retaining structure is larger. This research provides essential theoretical data support for excavation schemes of deep foundation pit construction.
SONG Lin- Li-Chang-Ning- Fan-Heng-Xiu
.Study on the Excavation Scheme for the Deep Foundation Pit of a Subway Station Approaching an Existing Railway[J] MODERN TUNNELLING TECHNOLOGY, 2016,V53(5): 154-160
2016, Vol. 53 