During the May Day holiday, railway construction in many subways has not stopped. The builders stick to their posts and are full of enthusiasm, seize the construction progress, and ensure high-quality and efficient progress of engineering construction.

In Gansu, the excavation of the Baiyangli Tunnel of the Tianlong Railway, which was jointly built by China Railway 16th Bureau, entered the final sprint stage. The main cave of Baiyangli Tunnel is about 6.1 kilometers long, passing through complex strata such as sandstone and silty mudstone, the surrounding rock is broken, and some areas are flooded with water. Tianlong Railway is a fast railway trunk line connecting Tianshui City and Longnan City in Gansu Province. It is also a key project of Gansu Province's "14th Five-Year Plan" railway development plan. The main line is about 208 kilometers long. After completion and opening to traffic, it will become a new convenient passenger and freight transportation channel from southeast Long to Sichuan and Chongqing.

The picture shows the construction site of Baiyangli Tunnel on the Tianlong Railway. (Photo provided by China Railway No. 16 Bureau)

In Shandong, on the construction site of the Jinwei High-speed Railway Bindong Yellow River Super Bridge, which was jointly built by China Railway No. 21 Bureau, 900-ton beam lifting machines, beam transport vehicles and bridge erected bridges under the command of the builders to work together to carry out the erection of the bridge box girders. The Bindong Yellow River Super Bridge is more than 42 kilometers long and is a control project of the Tianjin-Wei High-speed Railway. The Tianjin-Weifang high-speed railway is an important part of my country's "eight vertical and eight horizontal" high-speed railway network. The main line is about 348 kilometers long. After completion and opening to traffic, the road network structure in the Bohai Rim region will be further improved and the interconnection between Tianjin and Hebei and Shandong will be promoted.

In Hebei, at the construction site of the No. 1 Bridge of Bianjiayu Village, Xiongxin High-speed Railway, the builders of China Railway 18th Bureau are accelerating the laying of the remaining 184-hole box beams of the Xiongxin Fourth Country. Up to now, the Hebei section of Xiongxin High-speed Railway has completed more than 1,700 box beam erection, completing 70% of the total beam erection task. The Xiongxin High-speed Railway is an important horizontal channel for the "four vertical and two horizontal" regional high-speed railway network in Xiongan New District. After completion and opening to traffic, it will end the history of the old revolutionary base Fuping County, and further improve the high-speed railway network in the Beijing-Tianjin-Hebei region.

The picture shows the construction site of the fourth standard beam of Xiongxin High-speed Railway. (Photo provided by China Railway 18th Bureau)

In Henan, on the construction site of the Wuluo Bridge of Pingluozhou High-speed Railway, more than 300 China Railway 15th Bureau builders shuttled and worked busy at various construction sites. "The Wuluo Super Bridge is more than 33 kilometers long and spans multiple existing lines. It is difficult to construct and has high safety risks." said Xia Wenming, project leader of China Railway 15th Bureau. The Pingluozhou High-speed Railway is located in the central and southern part of Henan Province. The line starts from Pingdingshan West Station of Zhengzhou-Wanzhou High-speed Railway and ends at Zhoukou East Station of Zhengzhou-Fu High-speed Railway. The main line is about 200 kilometers long. After completion, it will further improve the regional comprehensive transportation system and help the high-quality economic and social development along the route.

In Shaanxi, on the banks of the Han River in Ankang City, a "steel dragon" spanning the heavenly chasm is rising from the ground. As a control project of the Kangyu High-speed Railway, the Ankang Hanjiang Bridge, which was constructed by China Railway 19th Bureau, is undergoing steel arch installation, and the main arch rib hoisting has been completed by more than 40%.

According to the project manager of China Railway 19th Bureau, the Ankang Hanjiang Bridge is currently the largest single-hole span of a high-speed railway with a speed of 350 kilometers per hour in China. During the construction process, the project team created a digital engineering management and control intelligent construction platform, integrated cable crane safety monitoring, gantry crane monitoring, automatic monitoring of poor geology, and drone safety monitoring to collect and analyze data in real time, greatly improving the efficiency of arch rib installation.

The picture shows the construction site of the Ankang Hanjiang Bridge. (Photo provided by China Railway No. 19th Bureau)

Nearly a hundred miles away, the construction of Yujialiang Tunnel, the longest tunnel in the Shaanxi section of the Kang-Chongqing High-speed Railway, which was undertaken by China Railway No. 14th Bureau, has also made new progress. The tunnel has been excavated for a total of 5,000 meters, achieving simultaneous advancement of 7 working faces. The Yujialiang Tunnel is located deep in the Qinba Mountains, with a total length of about 14.5 kilometers. It passes through multiple fault-breaking zones and has poor geology such as coal seams, gas, and large deformation of soft rocks. It is a key and difficult control project of the entire Kangyu High-speed Railway.

In Hubei, the construction of Yifu High-speed Railway, a key component of the Yangtze River High-speed Railway, which was jointly established by China Railway 20th Bureau, is progressing smoothly. On the inclined shaft construction site of the Changling Tunnel, a control project of the Hubei section of the Yifu High-speed Railway, the builders are undergoing renovation and reinforcement of the construction access road in the construction area and are about to enter the inclined shaft excavation stage. The Changling Tunnel is more than 11,000 meters long and has a maximum burial depth of 1,049 meters. It passes through multiple faults and is a first-class high-risk tunnel. After the Yifu High-speed Railway is completed and opened to traffic, the travel time from Yichang to Chongqing will be shortened to about 2 hours, which is of great significance to improving the comprehensive three-dimensional transportation corridor of the Yangtze River Economic Belt and promoting the high-quality development of the Yangtze River Economic Belt.

In Zhejiang, machinery roared at the construction site of the Qujiang Super Bridge of Zhejiang Quli Railway, and more than 40 builders of China Railway 11 Bureau made every effort to promote the construction of the Qujiang Super Bridge across Qujiang continuous beam pile foundation. "The continuous beam is 600 meters long and spans the busy Qujiang waterway." said Wang Jinliang, project leader of China Railway 11 Bureau. The Qujiang Super Bridge is about 10.59 kilometers long and integrates deep foundation, piles, high piers and large spans. It is a key and difficult control project of Quli Railway.

The picture shows the construction site of the Qujiang Super Bridge on the Quli Railway. (Photo provided by China Railway 11th Bureau)

In Guangdong, the second phase of Shenzhen Pinghunan Comprehensive Logistics Hub Project is in a busy situation, and various processes such as welding, steel bar binding, and steel structure hoisting operations are carried out in an orderly manner. More than 2,000 builders from China Railway 25th Bureau have stood on the front line and seized the progress of the project construction. It is expected that all steel structure construction will be completed by the end of May. The total construction area of ​​Pinghunan Comprehensive Logistics Hub Project reaches 1.11 million square meters, making it one of the first 23 national logistics hubs in the country. (Reporters Fan Xi and Wang Youling)