On September 15, 2021, with the completion of the last pile foundation, the world's first inland river large-diameter pile group foundation undertaken by China Railway Bridge Bureau-Chao-Ma Intercity Railway Ma'anshan Road and Railway Yangtze River Bridge, with 132 main bridges The construction of the pile foundation with a diameter of 4 meters has been completed.

The largest in the world set by Ohashi

●Main bridge span:

In order to implement the requirements for the protection of the Yangtze River and reduce the impact of bridge construction on flood control, ecological environment and the Yangtze River channel, the bridge adopts a three-tower and two-span design with a single span of 1120 meters. It is the world's first kilometer-level three-tower dual-purpose cable-stayed cable-stayed bridge. bridge.

Compatible with the span of the bridge, there are also super-large-scale, super-high towers, super-large-diameter bored piles and other combinations. After the completion of the bridge, it will set many world records.

●Main tower height:

The middle tower of the bridge is 345.6 meters high, which is equivalent to a 115-story building, and is the tallest bridge tower in the world;

●Platform area:

The pile cap is 89.2 meters long and 54.7 meters wide, with a plane area of nearly 5,000 square meters, equivalent to eight standard basketball courts, and is the world's largest bridge pile foundation;

●Steel beam length:

The steel beam has a total length of 3248 meters, making it the longest combined steel truss beam in the world

Safety + high quality + high efficiency

In order to build the bridge in a safe, high-quality and efficient manner, the project department established a research team to optimize the construction plan during the pile foundation construction process; transform the construction equipment to enhance the automatic scouring of the drill bit by the mud in the drill bit during the drilling process, and effectively improve the drilling A series of measures, such as drilling holes by the combination of "rotary digging and rotating"; increasing concrete production capacity and improving concrete pouring methods, created a new record for the construction of super-large apertures in China, and completed the main tower of the bridge in less than 7 months The pile foundation construction has greatly accelerated the construction progress of the main bridge pile foundation.

Project link

The Chaoma Intercity Railway Ma'anshan Yangtze River Highway-Rail Bridge starts from He County and passes through the middle section of Jiangxinzhou to Dangtu County. The upper layer of the bridge is a two-way six-lane urban expressway with a design speed of 80 kilometers per hour; the lower layer is a four-line railway, two of which are intercity railways with a design speed of 250 kilometers per hour, and the other two lines are reserved railways with a design speed of 200 kilometers per hour.

Chaoma Intercity Railway is an important part of the national "eight vertical and eight horizontal" high-speed rail network between Hefei and Shanghai on the Shanghai-Hanrong Expressway. It is also the first intercity railway project jointly built by provinces and cities in Anhui Province. It is connected to the Shanghe-Hangzhou high-speed railway in the north and the Jiangsu-Southern Yangtze River Intercity in the east. It is not only a direct link between Ma'anshan and the provincial capital Hefei, but also a new high-speed rail channel from Anhui to Shanghai and other cities in the Yangtze River Delta. It is of great significance to improve the transportation capacity of the channel and promote the integrated development of the Yangtze River Delta and the development strategy of the Yangtze River Economic Belt. Editor/Sang Xiaomei