Grouting reinforcement construction of bed bridge slab;

With reference to the reinforcement construction of Ningbo Qin Bridge after fire,the author mainly presents the reinforcement theory,the characteristics,the scope of application and strengthening construction plan of TYFO fibrwrap.

To research the stability of concrete-filled steel tubular(CFST) arch bridges with lateral displacement,and provide theory support to strengthening construction,the space calculated model was built to analyze the buckling and instability behavior of the bridge under various cases using finite element program.

Through long time study and research and practice of work, this article introduces a new type strengthening material-carbon fibre and discusses strengthening construction methods.