Abstract:Suspension bridge with simple support structure system is a new type of suspension bridge structure system. This kind of structure can solve the problems of small stiffness and easy fatigue of the suspension bridge, and beautify the landscape. The characteristics of the new structure and the construction technology of the main cable are introduced.

Abstract:The Tianjin Yonghe Bridge with a main span of 260 meters has been applied in foreign countries, such as the P-K bridge in the United States with a main span of 300 meters.

Abstract:This paper introduces the key technology of castin situ prestressed concrete continuous box girder viaduct, which is used for the first time in Ningxia region, including the determination of construction scheme, the popularization and application of WDJ multi-functional scaffold, the construction of high grade concrete, and the construction method of post-tensioned prestressed steel strand.

Abstract:Based on the application of OVMXGK15-55(also known as OVMXGK15-55 hole adjustable and exchangeable steel wire tie rod anchor) in tie rod arch bridge, the function and performance characteristics of adjustable and exchangeable steel wire tie rod anchor in tie rod arch are explained, and its structural characteristics, application methods and precautions in construction are introduced. Two 900 tons of jacks are used, and the most advanced tensioning method - suspension method is selected to carry out tensioning, which fills the vacancy of large steel strand anchor in China and provides a solid technical guarantee for the service life of the bridge.

Abstract:This paper introduces the pile sinking technology of large diameter PHC pipe pile, as well as the matters for attention and problems in the process of pile sinking.

Abstract:This paper presents a method for calculating stress in plastic zone of circular roadway considering hardening conditions.

Abstract:The stress of concrete pylon of long-span cable-stayed bridge is complicated. In this paper, the stress analysis of the anchorage section of the pylon column is carried out by using the space program ANSYS, and several common prestressed arrangement schemes are calculated to find out the most suitable number of beams.

Abstract:According to the structural characteristics of rock mass and cable structure of Ma Ya high slope of Shuibuya Project, the study and optimization of unbonded prestressed cable grouting technology has realized the real full-length one-time grouting, which has good promotion value for ensuring the construction quality of cable, improving the anti-corrosion performance and durability of cable, and carrying out cable construction in the strong karst crevass limestone stratum.

Abstract:A new cable anti-corrosion technology and its application for cable Bridges are introduced. The technology belongs to the bridge site secondary anti-corrosion, and has the advantages of convenient construction, no need to close the whole bridge, economy and environmental protection. There are well-established cases.

Abstract:The third Bridge is the world's first double-deck traffic prestressed cable-stayed bridge, the upper layer is two-way 6 lanes, the lower layer is two-way 4 lanes in the near future, and the long-term is two-line light rail. The main span of the main bridge is 180m harp-type thin cable cable-stayed bridge,"m" shaped main tower, and the approach bridge is 60m high prestressed concrete box girder.

Abstract:With a land area of less than 26 square kilometers and a population of more than 400,000, Macau has four Bridges and one connecting highway. The development of Bridges in Macao is closely related to its own economic development.