en.Wedoany.com Reported - On May 23, with the successful pouring of concrete for the final pile foundation, all 64 pile foundations for the 360-meter long-span continuous rigid frame—the key control project of the Yangzhou East Station North-East Link Line undertaken by the First Company of China Railway No.9 Group—were completed. This marks a phased breakthrough in the construction of the project's critical node, laying a solid foundation for the efficient advancement of subsequent works.
The continuous rigid frame constructed this time has a total of 64 pile foundations. Among them, the two side piers each have 12 pile foundations with a diameter of 1.5 meters, and the two main piers each have 20 pile foundations with a diameter of 2 meters. The designed pile length for the main pier foundations reaches 95 meters. Characterized by large diameters, deep pile depths, high technical requirements for construction, and complex geological conditions, they were considered one of the major difficulties and key points of the entire line's construction.
As the core control project of the line, the construction progress of this continuous rigid frame directly determines the overall construction progress of the entire line. As the most fundamental and preliminary core process in the substructure, the construction quality and progress of the pile foundations have a decisive impact on the subsequent construction of pile caps, pier shafts, and the superstructure.
In response to the construction characteristics of large-diameter, long pile foundations, the project team introduced high-precision borehole detection instruments for full-process quality control. This equipment can measure the actual diameter and verticality of the pile hole in real time, effectively overcoming the drawbacks of traditional methods. Through hole-by-hole scanning and inspection, the construction team can promptly grasp the expansion, shrinkage, and inclination of the hole walls, and timely correct pile holes with deviations exceeding limits. The application of this technical equipment significantly improved the first-time acceptance rate of borehole completion, ensured that the pile foundation quality met design requirements, and guaranteed the quality of subsequent pile formation.
The smooth completion of all pile foundations this time officially kicked off the construction of the continuous rigid frame's pile caps, pier shafts, block No. 0, and the upper beam structure, securing a critical window period for subsequent large-scale superstructure construction such as form traveler construction and beam casting. Next, the project team will continue to closely monitor key milestones, seize the prime construction period, scientifically allocate resources, and coordinate the construction of pile caps, pier shafts, and block No. 0 to ensure the smooth realization of the overall schedule target.
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