Performance features of composite foundation of top-shaped concrete blocks-sand bag well without connecting bars
LIU Guangyu1,YU Yanjie2,3,LI Guowei2,4,XIONG Li2,5,WU Jiantao2,4
(1. Erguang Branch of Guangdong Road and Bridge Construction Development Co.,Ltd.,Qingyuan,Guangdong 513300,China;2. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing,Jiangsu 210024,China;3. Zhejiang Electric Power Construction Company,Ningbo,Zhejiang 315000,China;4. Highway and Railway Research Institute,Hohai University,Nanjing,Jiangsu 210024,China;5. Geotechnical Research Institute,Hohai University,Nanjing,Jiangsu 210024,China)
Abstract:The composite foundation of top-shaped concrete blocks(TSCB)-sand bag well(SBW) were found to perform very well in soft clayey deposit treatment. However,relevant study about the optimum design of TSCB-SBW foundation were seldom reported. This research compared the engineering performance normal TSCB-SBW foundation and the non-connecting bar(NCB) TSCB-SBW foundation to investigate the features and functions of connecting bars in the TSCB-SBW system. The results showed that (1) the NCB TSCB-SBW foundation has only 10% higher settlement and 20% larger lateral displacement than the normal TSCB-SBW foundation. In addition,the NCB TSCB-SBW foundation showed a better mechanical performance and an equivalent plastic strain with normal TSCB-SBW foundation. (2) Compared with the gravel cushion,as the excellent self-balance of TSCB,TSCB-SBW foundation behaves good integrity and deformation controlling. In general,NCB TSCB-SBW foundation and normal TSCB-SBW foundation presented similarity in settling controlling,pore pressure dissipation,stress in blocks and distribution of plastic strain.
刘广宇1,余彦杰2,3,李国维2,4,熊 力2,5,吴建涛2,4. 无筋式陀螺桩–砂井地基的工作特性[J]. 岩石力学与工程学报, 2021, 40(S1): 2954-2959.
LIU Guangyu1,YU Yanjie2,3,LI Guowei2,4,XIONG Li2,5,WU Jiantao2,4. Performance features of composite foundation of top-shaped concrete blocks-sand bag well without connecting bars. , 2021, 40(S1): 2954-2959.