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《Construction Technology》 2011-24
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Study on Redundancy of Foundation Excavation Convex Location Supported by Soil Nailing

Wang Haixu1,Cheng Xuesong1,Zheng Gang2(1.Department of Civil Engineering,Tianjin University,Tianjin 300072,China; 2.MOE Key Laboratory of Coast Civil Structure Safety,Tianjin 300072,China)  
As the convex location of foundation excavation is disadvantageous locations to control its displacement,a special consolidation design is necessary.The redundancy theory on design is introduced for the underground engineering field.The convex location of foundation excavation supported by soil nailing has been consolidated with breast beam and its redundancy has been analyzed.The horizontal displacement of the side-wall,the axial force of soil nailing in original system and redundant system have been respectively analyzed and compared.The work situation of soil nailing with breast beam support system when part of soil nailing failed has been studied.The results prove that consolidating the convex location of excavation supported by soil nailing with breast beam can effectively control the displacement of dangerous location,transfer the redundant load and increase the transferring path.Hence,it can improve the redundancy of support system.
【Fund】: 国家重点基础研究发展计划(973计划)资助项目(2010CB732106)
【CateGory Index】: TU472
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