Bridge with carbon fiber cables

Xinghua Road bridge across the Tusi River is 388.285 meters long, the design speed of 50 kilometers per hour, the bridge is designed with two-way 6 lanes, reserved for two-way 8 lanes conditions, and consider setting up non-motorized lanes and sidewalks. 

Approach bridge, the main bridge deck full width of 40 meters, the main bridge with lotus-shaped single-tower double cable-stayed bridge, the total length of 200 meters, steel girders for all-welded steel box girder structure, the main bridge steel girders will take the first assembly welding and then step top pushing in place the way construction. 

Cable for the fan-shaped arrangement of space double cable surface, using standard strength 1770MPa parallel steel cable, the bridge a total of 72 cable, the longest 73.9 meters, the maximum weight of a single 3.12 tons. The bridge tower consists of 2 main towers and 1 sub-tower, the main and sub-towers are connected by spatial rope surface ties, both sides of the main tower is 55.9 meters high, from the side view and the vertical direction is set at an angle of 30 ° inclined, the middle sub-tower is 51.9 meters high, set vertically.

Xinghua Road bridge construction across the Tusi River will use super tough concrete technology. Super tough concrete has the characteristics of high compressive strength, high flexural strength, strong expansion and ultra-high toughness, especially its linear expansion coefficient is close to the linear expansion coefficient of steel plates, which can be well combined with the surface of steel girders to reduce rigid impact and prolong the use of the bridge. The tensile strength of super tough concrete is 10 times that of traditional concrete, and its fracture toughness is 200 times that of traditional concrete. After the steel box girder and super high toughness concrete are combined into a whole, the local stiffness of the bridge deck is increased by 40 times, and the risk of fatigue cracking of the steel deck is greatly reduced.

The bridge will also use carbon fiber composite materials (CFRP) cable, this new material is used more in foreign countries, currently no relevant domestic applications, such as the use of successful, Xinghua Road bridge across the Tushi River will become the first domestic bridge using carbon fiber cable. Bridge construction process, will also apply green, energy-saving BIM technology for the construction of the whole process of quality management.