June 30,
Constructed by China Railway Bridge Bureau Group
Xiangjing High-speed Railway 1 bid: Xiangyang East Station double-line bridge
The last karst pile foundation was successfully poured,
It marks the completion of all the construction of the pile foundation of the bid section.
A few days ago, the bid section of the Xiangjing high-speed rail Yicheng Hanjiang Bridge
The first main tower was successfully topped out,
Breakthroughs have been made in the construction of the project.
The total length of the project is 116.73 kilometers,
Design speed 350 kilometers per hour,
It is expected to be completed in 2026,
Xiangyang ↔ Jingmen
will compress to more than 20 minutes.
In addition, Jingmen West Station is connected to Jingjing High-speed Railway.
At that time, Xiangyang ↔ Jingzhou
Expected from the current nearly 4 hours
Compress to 1 hour.
It is understood that the Xiangjing high-speed railway starts from Xiangyang East Station in the north, passes through Yicheng City to Jingmen City, and shares Jingmen West Station with the high-speed railway along the Yangtze River under construction, which is an important part of the "Hunan Channel", one of the main channels of the national "eight vertical and eight horizontal" high-speed railway.
The main line of the double-line bridge of Xiangyang East Station of Xiangjing High-speed Railway is about 1907.88 meters long, with a total of 432 pile foundations. The survey report shows that there are a total of 1,733 karst caves visible on the whole bridge, the maximum height of the karst cavity is 35 meters, the maximum number of single pile karst caves in series is 15, the longest pile foundation is 97 meters, and the strength of the rock layer structure layer is up to nearly 200 megapascals. The bridge has a large number of karst pile foundations, a wide range, a large scale of a single karst cavity, many karst caves in series, and high rock strength, which is the "ceiling" of the difficulty of pile foundation construction in China.
Xiangyang East Railway Station double-line bridge. According to the on-site pile foundation construction technicians, during the construction process, especially after the Spring Festival this year, the project department increased investment in various types of large-scale rotary drilling rigs, the use of a number of full sets of pipe rotary drilling rigs, the introduction of the largest XG800 rotary drilling rig in China and the first time in the rotary drilling rig in the rotary drilling rig using cone rhinestone technology, combined with complex geology to take grouting, steel casing follow-up and other construction technology, successfully overcome the adverse effects of rock hardness, quicksand layer, beaded karst caves and other types of strata, the bridge is expected to achieve breakthrough at the end of September.
Yicheng Hanjiang Bridge is a control project of Xiangjing Railway, with a total length of about 25.5 kilometers, spanning the Hanjiang River Basin, the main bridge site is in the Hanjiang River Class III waterway, and its main channel across the Hanjiang River is designed as a low-tower cable-stayed bridge with a bridge length of 576 (88+200+200+88) meters. Compared with the traditional diamond-shaped hanging basket, the large section cantilever pouring bridge building machine has the characteristics of high work efficiency, good stability, high safety and good stability.
Xiangjing high-speed railway Yicheng Hanjiang Bridge.
Source: Hubei Daily
Editor: Yang Xia │ Proofreader: Li Yanfei
Review: Cai Yanyan