大体积混凝土分层浇筑工艺对裂缝控制的影响机制

Key Points

• This study aims to explore how the layered pouring process affects crack formation in large volume concrete structures due to hydration heat.
• Systematic analysis of the physical mechanisms of crack generation in large volume concrete.
• Investigation of thermal conduction, stress evolution, and time-varying material properties associated with layered pouring.
• Evaluation of the layered method’s effectiveness in mitigating temperature stresses.
• Layered pouring reduced peak adiabatic temperature rise, thus diminishing temperature stress intensity.
• The technique optimized stress transfer at the interface of old and new concrete, enhancing crack resistance.
• Active intervention in the thermal-mechanical coupling process provided a refined control mechanism for crack management.