Study and reinforcement design on the floating up and cracking problems of an atrium-style basement
Local anti-floating failure occurrs in an atrium basement in Qingyuan City,Guangdong Province,resulting in the cracking of bottom slab,floating of pile foundation and failure of upper columns.Through detailed field investigation and calculation,the causes of anti-floating failure and destruction form of structure members are analyzed in depth,and the failure modes of joints are done with the finite element method.Thus rational reinforcement design scheme is put forward:some micropiles are added to reinforce pile foundation,columns with light damage are strengthened with increasing section area while badly damaged columns are done with replacement reinforcement,beams are strengthened by affixing carbon fabric by the bottom,severely cracked bottoms are strengthened by adding a new layer on it and epoxy resin grouts are used to seal lightly cracked bottom slabs.The accident analysis process and reinforcement design can provide reference for similar projects.
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