【摘要】 国内在建最大互灌互泄式省水船闸——青年枢纽是平陆运河的关键性控制工程，其难点在于船闸大体积混凝土连续浇筑方量大，施工时间长，混凝土工作性能和体积变形控制难度大，混凝土出现裂缝等缺陷的风险高，难以实现船闸长寿命服役。针对上述问题，提出了混凝土材料设计—现场施工—早期硬化三阶段协同控制方法：在材料设计阶段，优化混凝土配合比，确定混凝土工作性能控制指标；在现场施工阶段，对混凝土入模温度与工作性能进行精确调控；在早期硬化阶段，采取措施降低混凝土内外温差，进而降低温度应力及开裂风险。依托平陆运河青年枢纽船闸项目，实现了混凝土全过程质量控制；进而结合分布式光纤和温度传感器测量的混凝土内部温度历程，验证了所采用控制措施是合理有效的。更多还原

【Abstract】 The Qingnian Hub, the largest mutual irrigation and mutual drainage type water-saving lock under construction in China, is a critical control project for the Pinglu Canal. The primary challenges lie in the large-volume continuous pouring of mass concrete for the ship lock, long construction time, difficulties in controlling the workability and volumetric deformation of concrete, and the high risk of defects such as cracking, which hinder the achievement of long-term service life for the ship lock. Accordingly, a three-stage collaborative control method encompassing concrete material design, on-site construction, and early hardening is proposed. During the material design stage, the concrete mix proportion is optimized, and control indicators for concrete workability are established. In the on-site construction stage, precise control of concrete placement temperature and workability regulation are implemented. During the early hardening stage, measures are taken to reduce the temperature difference between the interior and exterior of the concrete, thereby mitigating thermal stress and cracking risks. Based on the Qingnian Hub ship lock project of the Pinglu Canal, achieves comprehensive quality control throughout the concrete process. Furthermore, the rationality and effectiveness of the adopted control measures are validated by combining distributed optical fiber and temperature sensor measurements of the internal temperature of the concrete.更多还原