港口与航道工程大体积混凝土施工中的温度裂缝风险评估与控制

Risk assessment and control of temperature cracks in large volume concrete construction of port and waterway engineering

摘要

港口与航道工程中的大体积混凝土施工受结构尺度、水化热释放特性与海洋环境多因素叠加影响，温度裂缝风险具有显著的阶段性与区域性特征。在硬化早期，混凝土内部温度随水化热累积不断升高，而外部受潮汐变化、海风冷却和昼夜温差影响，内部与外部形成较大温差，导致约束应力集中并诱发裂缝。为降低温度裂缝发生概率，本文的研究旨在为水工混凝土施工提供技术依据，提升工程质量与服役可靠性。

Abstract

The construction of large-volume concrete in port and waterway engineering projects is influenced by multiple factors including structural dimensions, heat of hydration characteristics, and marine environmental conditions. Temperature-induced cracking exhibits distinct temporal and regional patterns. During the early hardening stage, the internal temperature of concrete rises progressively with accumulated heat of hydration. Meanwhile, external factors such as tidal fluctuations, sea breeze cooling, and diurnal temperature variations create significant thermal gradients between the concrete’s interior and exterior. This thermal disparity leads to stress concentration and subsequent crack formation. To reduce the probability of temperature-induced cracking, this study aims to provide technical guidance for hydraulic concrete construction, thereby enhancing both engineering quality and service reliability.

关键词

大体积混凝土 / 温度裂缝 / 港口工程 / 水化热 / 风险控制

Key words

Mass concrete / Temperature cracking / Port engineering / Hydration heat / Risk control

参考文献

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