Advances in Bridge Construction Techniques in Japan
This study presents the engineering practices of several bridges to introduce the attempts of Japanese bridge engineers to advance bridge construction techniques,in a bid to better accommodate the structural characteristics and site environments of a particular bridge.The Sumi Bridge(phase-Ⅱ)involves piers that stand 125 m,the application of a number of prefabricated components stepped up the construction.Additionally,an intelligent warning and monitoring system was installed to prevent the disturbance of the construction of the phase Ⅱ structure to the operation of the existing phase Ⅰstructure,since the two are just spaced 50 m.In the Yobaisan Viaduct,the sections of main girder over the top of the piers were cast in situ in layers,and finished reinforcement was used,which contributed to the shortened construction time.In the Himiyume Bridge,the stay cables are anchored to the pylon via steel anchor boxes,and transparent formwork was utilized in concrete pylon construction to ease the concrete quality monitoring.The Shiino Hanaemi Ohashi Bridge is a continuous rigid-frame bridge with a main span of 150 m,the highest pier rises 93 m and dense reinforcement is placed at the connections of webs and soffit of the box girder.To ensure the concrete pouring quality,a simulation system was built to make ideal pouring schemes.Multiple concrete pouring tests were conducted to improve the long-distance concrete pumping quality for the cantilever construction.Tri-lens stereo cameras were used to detect the binding quality of reinforcement,achieving the automated reinforcement detection.
NETL
NSTL
万方数据
维普
