The completion of Chengdu Tuojiang Bridge will refresh the "world's best"!

Recently, with the completion of the pouring of the last pile foundation, the construction of 40 pile foundations of the main bridge of the Tuojiang Bridge of the second phase of the Jinjianren Expressway project was officially completed, and the bridge was transferred to the construction stage of piers and bearing caps.

The total length of the Tuojiang Bridge is 963 meters, the main bridge is 513 meters, and the widest point is 86.7 meters. The main bridge adopts the form of a single-tower double-cable-stayed bridge structure, with a total height of about 173 meters, and is a semi-enclosed steel box girder structure. When construction is complete, it will be the widest bridge in the world, large enough to accommodate a full-size football field.

At the same time, this super building with an investment of 10 billion yuan will also set the world's highest inclined pylon, the largest span asymmetrical curved single-tower twisted cable-stayed bridge and the world record for the largest amount of steel per linear meter.

The installation of steel structure is known as the most difficult "hard bone" in the whole line. The main body of the bridge uses 44,000 tons of steel, and the average steel consumption of 1 meter length is 78.45 tons, which is equivalent to the weight of 2.6 subway cars. It is here that one SCC600A-1 and two STC250H are stationed all year round.

Master Wang, the operator of SCC600A-1, introduced: "The Tuojiang River has not yet reached the conditions for navigation.craneIt is necessary to cooperate with the rotary excavation construction on the pontoon tank or temporary piling platform, although there are deep piles, anchor chains, and cables around to assist in positioning and fixing, but the impact of wind and waves on this floating construction platform is still huge. The slightest carelessness is prone to tilt deviation, which puts forward very high requirements for lifting equipment. ”

In addition, in the construction process, the hoisting operation is also faced with four major difficulties: the weight of the steel structure, the long operating distance, the complex structural form and the limitation of construction conditions. In such a special construction environment, the lifting equipment has a very obvious impact on the success or failure of the project, and a reliable 'partner' can make the project twice the result with half the effort. The SCC600A-1 I drove worked non-stop for a long time, and basically didn't drop the chain. ”

The Tuojiang Bridge is expected to complete the construction of the main pier cap by the end of April, realize the water flow of the main bridge tower column by the end of May, enter the bridge deck construction stage at the end of the year, and have the conditions for opening to traffic in August 2023.

As a major and difficult project of the Jin Jianren Expressway, the Tuojiang Bridge will become another beautiful business card leading to Tianfu Airport after its completion, and it also means the official breakthrough of the Jin Jianren Expressway.