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| Comparison Analysis of Construction Sequence of Deep Foundation on the Deformation of Nearby Existing Subway Station |
| XIANG Xian - hua |
| (China Railway Siyuan Survey and Design Group Co. Ltd, Wuhan,Hubei 430063 , China) |
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Abstract Abstract ： Research purposes ： The excavation of deep foundation will induce differential deformation to the nearby existing subway station, whereas the deformation due to different construction sequence has not been generally investigated. The comparison analysis of construction sequence on the regular pattern of deformation for the nearby existing subway station was conducted, which was based on one field case located in Changsha and numerical analysis. The deformation characteristic of retaining structure and main structure of nearby existing subway station was also analyzed for the zone excavated using bottom - up method and top - down inverse construction method at different excavation depth. Research conclusions:( 1 ) The lateral deformation of retaining structure increased gradually with increasing the excavation depth. (2) The deformation of nearby existing subway station at the zone excavated using bottom - up method was obviously larger than that at the zone using top - down inverse construction method. ( 3 ) The surface settlement induced by excavation was smaller using top - down inverse construction method, whereas the surface settlements for different construction sequence were in the range of safety and normally use requirements. (4) The research results can provide references for the design and construction of deep foundation nearby existing subway station.
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Received: 09 October 2015
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2015, Vol. 32 
