Zhengzhou Rainbow Bridge was built in 1994. Zhengzhou Rainbow Bridge is located in the west of Nanyang Road North Ring Interchange, which is connected with the West Third Ring Road. It used to be the east and west throat of Zhengzhou North District, and it is the landmark bridge of Zhengzhou City. The demolition of the old Rainbow Bridge started in July 20021year and was completed in June 2022. The newly-built Rainbow Bridge is designed as a three-span continuous steel box tied arch bridge with single arch rib, weighing about 2,000 tons. The arch rib is inverted trapezoid, and the section is widened and raised. The main bridge is 369 meters long and is scheduled to be completed in June 2023.

Rainbow Bridge is a four-span simply supported concrete-filled steel tubular truss bridge,122+62+122 m. The main bridge crosses the upper departure station, locomotive turn-back section and lower arrival station of Zhengzhou Railway North Marshalling Station from west to east, and the tracks under the bridge are dense, all of which are electrified railways. On the north and south sides of the bridge, the North Third Ring Road passes through the auxiliary road, and the traffic volume is large.

The Construction Course of Zhengzhou Rainbow Bridge

Zhengzhou Rainbow Bridge was built in 1994. Located in the west of Nanyang Road North Ring Interchange, it is connected with the West Third Ring Road. It is the east and west throat of Zhengzhou North District.

On 2021July 15, the main body of the overpass bridge of Zhengzhou North Ring Expressway, known as "Rainbow Bridge", officially began to be demolished.

2021165438+1On October 20th, a 62m-span steel truss arch bridge in the middle section of the Rainbow Bridge in the North Third Ring Road of Zhengzhou slipped from the original bridge site to the platform of the North Bridge under the drag of two 200-ton continuous jacks, which marked that the demolition project of the old Rainbow Bridge in the North Third Ring Road of Zhengzhou officially entered the horizontal demolition stage.

On April 8, 2022, on 18, Zhengzhou Rainbow Bridge and its wiring demolition and new construction project were under the demolition construction of the steel truss arch with the east span of 122 meters.

On June 10, 2022, the last hole of the old Rainbow Bridge122m steel truss arch was completely pushed out of the railway line of Zhengzhou North Marshalling Station, which means that the demolition of the old Rainbow Bridge has passed the most difficult stage and the safety risk of the railway line has been relieved. Next, the construction party will move the last steel truss arch to the north side of the bridge demolition area for demolition. It is estimated that all the old bridges of Rainbow Bridge will be demolished in July, and the construction of new Rainbow Bridge will be carried out simultaneously with the demolition of old bridges of Rainbow Bridge.

On September 7, 2022, it was learned from the Rainbow Bridge Project Department of China Construction Seventh Engineering Bureau Co., Ltd. that the first bid section of the steel box girder of the Rainbow Bridge SW ramp crossing the Beijing-Guangzhou expressway steel box girder bridge and the new project of wiring demolition (the second bid section) have been successfully erected. This is the first hoisting of the whole line of the project, which marks the official start of the erection construction of steel box girder of the project, and each bid section has entered the upper structure construction stage one after another.

In 2022, the steel box girder of the east span of Zhengzhou Rainbow Bridge was successfully pushed into place in the first round.

On June 5438+February, 2022 1 1, the new control project and wiring demolition project of Zhengzhou Rainbow Bridge, which was undertaken by Zhengzhou Urban and Rural Construction Bureau, Zhengzhou Railway Construction Management Co., Ltd. and China Railway Bridge Bureau, was successfully completed.

On February 24th, 2023, the first round jacking of the steel box girder of the west span of Zhengzhou Rainbow Bridge was successfully completed. On March 27th, the iron-related project of Zhengzhou Rainbow Bridge entered the final stage, and the jacking construction of the steel box girder of the west span of the new main bridge will be completed on March 3rd1.

On April 27, 2023, the steel box girder of the newly-built Rainbow Bridge in Zhengzhou was successfully closed, which created favorable conditions for the assembly and erection of the mid-span steel box arch of the bridge in the next stage. At 9: 00 am on July 18, the steel box arch of the newly-built Rainbow Bridge in Zhengzhou was successfully closed, which marked the completion of the main structure of the newly-built Rainbow Bridge and laid a solid foundation for the scheduled opening of the Rainbow Bridge.

Reference to the above content: Baidu Encyclopedia-Zhengzhou Rainbow Bridge