Xixi super large bridge of Fuzhou Xiamen high speed railway is expected to achieve a domestic record of high-altitude turning by the end of June next year
According to Xiamen Daily, two "colossus" under construction beside the existing Fuzhou Xiamen railway stand out. The person in charge of section 8 of Fuzhou Xiamen high speed railway of China Railway Fourth Engineering Group Co., Ltd. told reporters that this is the key control project of Xixi super large bridge of Fuzhou Xiamen high speed railway - rigid frame rotating continuous beam. The project has entered the key construction stage. At present, about 20% of the work volume has been completed, and the remaining main works are breaking through. It is expected to be completed and turned by the end of June next year, and then it will become the largest high-speed railway continuous beam turning project in China. A 6031 a 6031 rigid frame rotating continuous beam, as the name implies, is that after the completion of beam casting, it needs to complete the rotation. "According to the plan, the Fuzhou Xiamen high speed railway and the existing Fuzhou Xiamen railway will cross at piers 68 and 69 of Xixi super major bridge, and the Fuzhou Xiamen high speed railway will" cross "the Fuzhou Xiamen railway from above." Liang ShuiHe, chief engineer of the first division of Management Department of section 8 of Fuzhou Xiamen high speed railway, introduced that Fuzhou Xiamen railway is one of the busiest main lines of railway transportation in China at present, and it is difficult and risky to carry out the construction directly above it; in order not to affect the normal operation of the existing railway, the construction adopts the form of continuous beam rotation.
"generally speaking, the beam body adopts cast-in-place continuous beam construction. After the pouring is completed, it will be turned to the closure above the Fuzhou Xiamen railway." Liang ShuiHe said that the whole turning project will be carried out in the early morning when there is no train operation. At that time, the main pier of pier 68 will turn 24 degrees and the main pier of pier 69 will turn 21.1 degrees. The two continuous beams will be connected to complete the "assembly" and the whole process will take more than one hour.
as the continuous beam construction site is close to the existing railway, how to ensure the safe and efficient promotion of the project is the key to all construction personnel. For this reason, they work precisely to ensure safe and orderly construction, and the existing Fujian-Xiamen Railway is safe and secure; they innovate and optimize the technology, speed up the progress of beam construction, and ensure the construction period. The reporter learned that most of the girder erection works in the bid section are prefabricated box girders; however, the two continuous girders have a large span, and the segmental cantilever cast-in-place operation is adopted during construction. It is worth noting that the rotating weight of a single continuous beam is about 17500 tons, and with various construction equipment, the weight can reach 20000 tons. How to make such a heavy "big guy" turn around as a whole? At the construction site, the reporter found the answer - the main pier cushion cap of the swivel continuous beam is composed of the lower turntable, the ball hinge, the upper turntable and the swivel traction system. When turning, it is only necessary to use multiple jacks to pull the "swivel system" at the same time, which can be "easily" completed. (article / reporter Tang haibotu / Reporter Wang Xieyun)
project
Fuzhou Xiamen high speed railway
Fuzhou Xiamen high speed railway is an important part of the construction of "eight vertical and eight horizontal" high speed railway in China, which is a provincial and municipal key project. It is expected to be completed and opened to traffic in September 2022. The main line of Fuzhou Xiamen high speed railway is 277.42km long, of which Xiamen section is 48km long. Of the 48 kilometers, Xixi super major bridge, with a total length of 24.681 kilometers, is the longest bridge in the whole line constructed by China Railway fourth bureau group. The crossing of
Fuzhou Xiamen high speed railway and the existing Fuzhou Xiamen railway at piers 68 and 69 of Xixi super major bridge requires the continuous beam turning construction method, which is expected to be completed and turned by the end of June next year; according to the construction plan, the overall beam erecting construction of Xixi super major bridge is expected to be completed in September 2020, providing preconditions for the opening of the whole line of Fuzhou Xiamen high speed railway.