At 12:46 on May 18,2026, with the final load of concrete accurately and smoothly placed into the formwork, the large-volume concrete pouring for the chimney foundation of the Ningxia Power Investment Shizuishan 2×660 MW ultra-supercritical cogeneration project was successfully completed. This milestone achievement marks the successful completion of the underground foundation construction for the chimney and the official transition to the above-ground main structure phase, providing a solid foundation for subsequent standardized chimney wall construction and efficient project advancement.

The chimney foundation serves as the core load-bearing structure of the chimney project and acts as the critical "ballast stone" for the entire structure. It presents significant construction challenges, including its large volume, stringent requirements for structural integrity, and rigorous concrete construction quality control standards.The foundation slab for this construction project has a radius of 18.2 meters and a pouring thickness of 2.9 meters, with a total concrete volume of approximately 3,020 cubic meters. Due to the exceptionally large radius and thick slab structure, and in accordance with the client's specific requirements, a circulating water cooling system was installed within the foundation. To address multiple challenges—including the difficulty in controlling the heat generated during the hydration of large-volume concrete, the extended continuous pouring duration, and the complexity of on-site coordination—the project team made proactive plans and meticulous arrangements, developing dedicated construction plans and emergency response protocols. Through scientific construction organization and precise technical support, a solid foundation was established for the slab pouring.

During the construction preparation phase, the project team established robust quality and safety safeguards by organizing comprehensive safety and technical briefings involving all departments to clarify construction standards and operational requirements. Critical concealed works—including steel reinforcement, formwork, and embedded components—were inspected item-by-item to identify and rectify potential hazards. For resource allocation, coordinated efforts were made with ready-mixed concrete suppliers to optimize mix ratios and supply schedules. Three main pump trucks, two backup units, and 21 mixer trucks were strategically deployed, supported by a round-the-clock construction team ensuring uninterrupted concrete pouring. Continuous 24-hour supervision was implemented throughout the project, with management personnel on-site monitoring and technical/testing staff conducting real-time monitoring of concrete performance metrics while strictly controlling critical processes such as layered pouring, vibration, and curing. Despite challenges including nighttime operations and concurrent workloads, the entire team worked tirelessly for 21 hours to successfully complete the one-time continuous pouring of the foundation slab, with all specifications meeting regulatory standards.

The successful completion of this concrete pouring phase fully demonstrated the project team's iron-clad ethos—characterized by exceptional resilience, combat readiness, dedication, and continuous learning—which showcased the company's robust synergy through comprehensive coordination, multi-party collaboration, and full-staff commitment. Moving forward, the project team will leverage this achievement to strictly uphold safety and quality standards, refine process controls, optimize construction techniques, efficiently advance the main structural work, and ensure accelerated project delivery—all while contributing to regional energy security and local economic development.