Abstract:The design of modern large bridges is a complex process including technical, economic and organizational work. This paper describes the design procedures and contents of large bridge projects in China.

Abstract:The main cable is the main load-bearing member of suspension bridge, and the correctness or otherwise of the main cable alignment is the key to the success or failure of suspension bridge construction. Therefore, the calculation methods and results of main cable profile are very important in the design and construction of large-span suspension bridges. This paper briefly introduces two approximate calculation methods of the line shape, and at the same time focuses on a very close to the actual line shape of the main cable of the precise calculation method, and lists the results of the calculation of Yichang Bridge with this line shape calculation method.

Abstract:Provide an overview of the Scattered Flowers Viaduct.

Abstract:A number of issues to be noted and principles to be observed in the design and construction of unbonded prestressed circular pools are comprehensively analyzed and discussed for the reference of practitioners.

Abstract:This paper describes in detail the design and construction of 10×50m jacking continuous girders for the secondary holes of the main bridge of Yueyang Dongting Lake Bridge.

Abstract:The basic principle of vacuum-assisted grouting process is based on the ordinary grouting process, using vacuum pumps to remove the air in the hole, so that the formation of a negative pressure of 0.1Mpa vacuum in the hole, and then grouting. At the same time, the configuration of the grouting material has also been improved, reducing the water-cement ratio, so that the grouting to achieve the effect of full and dense.

Abstract:This paper discusses the construction technical problems such as rotary table grinding center, longitudinal girder arch rib construction system conversion and elevation adjustment of merging section in the construction of arch-beam combined transfer bridge.

Abstract:It introduces the application of high-efficiency steel reinforcement and prestressing concrete technology in Chengdu Wangfujing Shopping Center Project, and puts forward some problems that should be paid attention to the construction of prestressing concrete.

Abstract:By analyzing and comparing the performance of different types of prestressed flat plate structures in concrete building covers, it is suggested that unbonded prestressed flat plate structures should be used in multi-storey buildings and bonded prestressed flat plate structures should be used in high-rise buildings.

Abstract:In this paper, some experimental work was carried out in the marine environment on high-strength steel wires and strands used as prestressing tendons and on prestressed concrete members made from them. The corrosion mechanism and the corrosion condition of the strands, exposed and inside the members under stress in the marine environment are described and analyzed.

Abstract:From a stress corrosion point of view, the durability of strands does not differ by a small diameter difference. The efficiency of the anchoring system is, however, related to the diameter deviation of the strand.

Abstract:In order to ensure that the effective value of prestressing reaches the design requirements, the orifice drag coefficient and deflection coefficient are measured before tensioning. This paper mainly introduces the test method and the calculation and analysis results.

Abstract:This paper describes the history of bridge construction in Fujian Province in the past 50 years, summarizes the development and innovation of various bridge types, and proposes the future direction of bridge construction in Fujian Province.