About the author:

1. CCCC Second Harbor Engineering Co.,Ltd.,Wuhan,Hubei 430040,China;2. Key Laboratory of Large-span Bridge Construction Technology,Wuhan,Hubei 430040,China;3. Research and Development Center of Transport Industry of Intelligent Manufacturing Technologiesof Transport Infrastructure,Wuhan,Hubei 430040,China

Abstract:

Shiziyang Bridge is a single-span double-layer steel truss girder suspension bridge with a mainspan of 2180m,and the substructure of the approach bridge in west high-pier area on the Nansha side isa portal pier,which has the characteristics of high pier, large cross-sectional size. The appearancerequirements of the pier are higher. The pier body adopted the construction technology of 6m / sectionturnover formwork method. the reinforcement adopted the whole section of the parts production. Tapersleeve connection was used between reinforcing parts. At the same time,the pier curing cover based onairbag was developed,which improved the turnover efficiency of the formwork under the premise ofensuring the concrete curing time. The on-site construction efficiency of the pier reached 1.5m / d.Cooling water pipe was embedded in the concrete of the pier. The flow and temperature of the cold waterpipe were controlled by the intelligent temperature control system,which effectively controlled the internaltemperature peak and the temperature difference of the pier concrete. Practice shows that a series oftechnical achievements formed by pier construction can effectively improve the quality and efficiency ofpier construction.