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Double Arch Bridge is the main bridge type one of China 60-80 's county and township roads . It has a novel structure, material savings , ease of construction , low cost , etc. , in a wide range of promotion and use of small and medium - sized bridge construction . However, was limited to various conditions , curved arch bridge there are many defects and poor structural integrity , and has been in operation for 30 to 40 years , there are all sorts of diseases and defects , no longer meet the needs of rapid development of today's economy , taking into account the bridge-type like other arch bridge has the potential to overload , reinforcement and repair of the continued safe use and through reinforcement broaden the design to achieve higher standards . In this thesis, Jiangxi Province cursory Kong Bridge ( Hyperbolic arch ) reinforcement broaden the engineering background , structural inspection and testing of the bridge , the existing carrying capacity Computation of the status quo assessment and analysis, bridge , reinforced mention set out to broaden the program , widened structural Analysis and Calculation of reinforcement , reinforcement to mention upload widen and broaden the technical and implementation points , reinforcement effect validation and structural assessment of the whole process of research by changing the arch on the structure and system, to reduce the dead load and improve the structure of the force status to enhance the purpose of the carrying capacity of the bridge , to be supplemented by externally bonded carbon fiber cloth , cantilever widening outsourcing reinforced concrete measures to reinforce and widen the bridge . This paper focuses on the structural system by changing the arch to reinforce the curved arch bridge reinforcement mechanism , summed up the construction methods and the implementation of the results , in order to promote the use of the same type of bridge reinforcement , mention upload and broaden the practice .
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