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| Research on the Deformation Law of Deep Excavation Supporting Structure in Metro Interchange Station by FLAC Simulation |
| REN Jianxi1，GAO Tao2 |
| 1. Xi 'an University of Science and Technology , Xi 'an , Shanxi 710054，China;2. Beijing Urban Construction Exploration&Surveying Design Research Institute Co. Ltd, Beijing 100101 ,China |
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Abstract Research purposes:In the engineering background of deep excavation of Datunlu metro transfer station of Beijing subway Olympic branch line,the combination of in-situ monitoring with FLAC simulation is used as the methodology, deformation law of deep excavation supporting structure of city subway station is studied. And it provided a basis for supporting structure optimum design of Beijing metro excavation projects and information construction.
Research conclusions: When open excavation construction is carried out in deep excavation of city subway transfer station under complex environment, in-situ monitoring is a useful measure for safety guarantee to information construction. For subway station with complicated shape, compound maintenance forms that it includes retaining pile, steel support and anchor cable should be adopted to be as supporting structure of deep excavation. Stratified excavation method of earthwork and applying prestress to steel support are the important measure of reducing spatial effect and guarantee safe construction. FLAC numerical simulation is important means for the study of deep excavation deformation law.
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Received: 23 April 2008
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2008, Vol. 25 
