Striving in the Third Quarter! A Record of the Completion of the Expansion Generator Foundation Base Slab Pouring at the Tongchuan Compressed Air Energy Storage Project

en.Wedoany.com Reported - On August 12, after 21 consecutive hours and a total of 1,676 cubic meters of concrete poured, the large-volume concrete pouring task for the expansion generator foundation base slab in the main workshop of the Tongchuan Compressed Air Energy Storage Project, undertaken by CEEC Construction Group, was successfully completed, laying a solid foundation for the subsequent high-precision installation of the expansion generator unit and the structural construction of the main workshop.

Scientific Planning: Thorough Preparation Before Pouring

The expansion generator foundation base slab in the main workshop is the load-bearing structure for the generator equipment. It involves large-volume reinforced concrete pouring, characterized by complex design, high technical requirements, and significant construction difficulty. The base slab has a plan area of 605 square meters and a thickness of 2.5 meters, requiring a one-time continuous pour of 1,676 cubic meters of concrete, featuring prolonged continuous operation and stringent temperature control and crack prevention standards.

The project department strictly implemented the safety control requirements of the "Ten Hard Measures," "Eight Uniform Rules," and "Ten Musts and Ten Arrangements," moving the safety threshold forward. Before pouring, a comprehensive safety hazard inspection was organized, with step-by-step verification of temporary power supply at the construction site, pump truck positioning, and mixer truck access routes. A special assessment was conducted on the bearing capacity of the foundation in the pump truck positioning area to ensure the safe operation of large mechanical equipment on site. Meanwhile, the project department carried out special safety technical briefings for all personnel involved, clarifying safety responsibilities for each position and emergency response procedures.

The project department planned ahead and deployed in an orderly manner. Given the prolonged storage of rebar, formwork, and embedded parts, a re-inspection was organized on August 11 with the owner, supervisor, general contractor, and construction crew. Concurrently, a technical briefing on the large-volume concrete plan was held to optimize the special construction scheme and verify pouring conditions item by item. To address the core technical challenge of hydration heat temperature control in large-volume concrete, the project department led the commercial concrete station and construction crew in optimizing the concrete mix design, scientifically arranging temperature measurement points, and upgrading the intelligent temperature monitoring system to enable precise real-time monitoring of the internal temperature field of the concrete.

Full-Process Control: Strict Safety and Quality Management During Pouring

During the pouring process, project management personnel maintained full-time on-site supervision, with technical staff closely monitoring key processes such as concrete pouring and vibration. Two high-power concrete pump trucks were scientifically deployed for coordinated operation on site, employing the proven technique of "sloped layering, thin-layer coverage, sequential advancement, and stacking to the top," with strict control over the thickness of each layer and the pouring speed. Testing personnel increased the frequency of random inspections, carefully checking key parameters such as concrete slump and pouring temperature before placement to ensure the concrete performance consistently met design requirements. Relying on the intelligent temperature control system, the curing strategy was dynamically adjusted, strictly keeping the internal-external temperature difference within the specified range, effectively mitigating the risk of temperature cracks. Personnel were assigned to continuously observe the vibration process, temperature measurement, and concrete curing to ensure meticulous work and first-time quality.

The project department strictly implemented the leadership duty system and blind-time (off-peak hours) on-duty system. For special conditions such as nighttime construction and continuous operations, the scheduling of night-shift management and operational personnel was optimized, inspection frequency was increased, with particular attention paid to pump truck operating status, mixer truck transport route safety, and the mental state of workers, promptly identifying and eliminating safety hazards to ensure full-process construction safety. Cooling supplies and emergency medications were simultaneously provided at the pouring site, along with logistical support, to ensure operational continuity and the health and safety of personnel.

Consistent to the End: Strict Curing, Acceptance, and Quality Control

After pouring was completed, workers immediately performed troweling and compaction on the concrete surface to eliminate the risk of early plastic shrinkage cracks. Plastic film and geotextile were successively laid on the base slab surface to effectively reduce surface moisture evaporation, maintain a moist state, and ensure effective control of the internal-external temperature difference of the large-volume concrete. After the expansion generator foundation formwork is removed, the project department will organize the owner and supervisor to conduct a comprehensive inspection and acceptance of the base slab's appearance quality, embedded part positioning accuracy, flatness, and elevation deviations. Complete technical documentation, including construction process records, temperature control data, and test block inspection reports, will be compiled and organized to ensure complete records, authentic and traceable data, and one-time acceptance approval.

In the next steps, the project department will continue to strictly uphold safety, quality, and schedule standards, advancing subsequent construction milestones through full-process refined management to ensure the project is completed and commissioned safely, with high quality and efficiency. (Chen Long)