On January 12, 2024, Zhou Xiaoming, chief photographer of Yangzhou Zhenzhou Mansion and Yizheng Grand Wharf, excerpted the information released on the WeChat *** platform of "China Railway 15th Bureau Group Urban Rail Company": Recently, with the smooth hoisting of the steel cage of the last sub-section of the underground diaphragm wall, the construction of 8 underground diaphragm walls under the 110kV high-voltage line with the greatest hoisting risk and the highest construction technology requirements at Wannian Road Station in the first work area of Ningyang Intercity (Yangzhou Section) of China Railway 15th Bureau Group was successfully completed, laying a solid foundation for the subsequent excavation of the station foundation pit.
Among the 76 underground diaphragm walls of Wannian Road Station, 8 are located under the 110kV high-voltage line across the foundation pit and the overhead height of about 29 meters, and the hoisting risk is extremely high, of which 2 are "Z-shaped" special-shaped widths, and at the same time must be divided into 2 sections of "L-shaped" for splicing in the vertical section, which is a great test for the construction technology.
How to successfully hoist these 8 pairs of underground diaphragm walls under the premise of ensuring safe construction and without affecting the subsequent construction of the enclosure structure and the main structure construction is a great challenge for all members of the project department.
Before the start of hoisting, in order to control the safety risk of short-distance hoisting under the high-voltage line, ensure the construction safety in the hoisting process and the quality of the underground diaphragm wall, the project department has taken a variety of measures
The first is to carefully organize and actively coordinate all units. Actively solicit the opinions of power property rights units, jointly conduct field visits to various units for many times, strictly organize and implement, and firmly grasp every step of the construction plan.
The second is to repeatedly optimize the hoisting and construction plan. The project department held a verification meeting on the acceptance of the groove of the ground wall and the pre-construction conditions of the reinforcement cage hoisting, continuously optimized the crawler crane hoisting plan and the reinforcement cage production plan, and finally determined to shorten the crawler crane main boom to 22 meters, and the overall production and vertical splitting of the reinforcement cage into 12m + 12m + 12m + 9The 46m four-section hoisting connection greatly ensures the safety of construction.
The next step is Ningyang Intercity (Yangzhou Section) No. 1 Work Area.
We will continue to uphold the concept of "honesty and striving for the first".
Strengthen the risk awareness and quality control awareness of all employees.
Implement whole-process safety control and refined management.
Ensure the successful completion of the construction task of the ground connecting wall.
Create favorable conditions for the excavation of the foundation pit of the station.