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《Chinese Journal of Underground Space and Engineering》 2012-03
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Effects of Excavation Sequences on the Construction Risk of Super-deep Foundation Pit Adjacent to Metro Tunnels

Liang Fayun1,Yin Shengquan1,Zhou Wei 2(1.Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China;2.Shanghai No.5 Construction Co.Ltd., Shanghai 200063,China)  
A super-deep foundation pit adjacent to metro tunnels is treated as the analytic object.This paper focuses on the effects of different excavation sequences on the ultra-deep foundation pit construction adjacent to the metro tunnels.Displacements of soil and retaining structures and the stability of foundation are considered as the main factors index.Fuzzy comprehensive evaluation method is adopted to analyze the construction risk of deep excavation.The risks of foundation and surrounding environment are taken into consideration as a whole system.The difference of different excavation sequences is analyzed with quantitative risk analysis.The results show that it is important to choose a reasonable excavation sequences for complex excavation which can reduce the risk of construction obviously.
【Fund】: 上海市科技攻关计划项目资助(09231200900)
【CateGory Index】: U231.3
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