摘 要
大体积混凝土工程在现代土木建筑中占据重要地位，但其施工过程中因温度变化引发的裂缝问题已成为影响结构耐久性和安全性的关键因素。为解决这一难题，本研究以大体积混凝土温度裂缝控制为核心，系统分析了温度场分布规律及其对裂缝形成的影响机制。研究通过理论建模、数值模拟与现场试验相结合的方法，深入探讨了混凝土内部水化热释放规律及外部环境温差作用下的应力分布特征，并提出了一种基于动态调控的温度裂缝综合防控技术方案。该方案创新性地引入了智能温控监测系统和分层浇筑优化策略，显著提高了温度控制的精准度和施工效率。研究结果表明，所提出的防控技术能够有效降低混凝土内外温差，减少因温度应力导致的裂缝风险，同时为类似工程提供了可借鉴的技术路径。本研究的主要贡献在于建立了适用于复杂工况的温度裂缝预测模型，并验证了其在实际工程中的可行性和可靠性，为推动大体积混凝土施工技术的发展提供了理论支持和实践指导。
关键词：大体积混凝土；温度裂缝控制；水化热；智能温控监测；分层浇筑优化
ABSTRACT
Massive concrete construction plays a crucial role in modern civil engineering, yet the cracking issues induced by temperature variations during construction have become critical factors affecting structural durability and safety. To address this challenge, this study focuses on the control of temperature-induced cracks in massive concrete, systematically analyzing the distribution patterns of the temperature field and their influence mechanisms on crack formation. By integrating theoretical modeling, numerical simulation, and field experiments, the study thoroughly investigates the release patterns of hydration heat within concrete and the stress distribution characteristics under external environmental temperature differences. A comprehensive prevention and control technology scheme based on dynamic regulation is proposed, innovatively incorporating an intelligent temperature control monitoring system and an optimized layered pouring strategy, which significantly enhances the accuracy of temperature control and construction efficiency. The results demonstrate that the proposed technology effectively reduces the temperature difference between the interior and exterior of the concrete, mitigating the risk of cracks caused by thermal stress, while providing a referable technical approach for similar projects. The primary contribution of this research lies in establishing a temperature-induced crack prediction model applicable to complex working conditions, and validating its feasibility and reliability in practical engineering applications, thereby offering theoretical support and practical guidance for the advancement of massive concrete construction technology.
Keywords: Mass Concrete; Temperature Crack Control; Hydration Heat; Intelligent Temperature Monitoring; Layered Pouring Optimization
目 录
摘 要 I
ABSTRACT II
第1章 绪论 1
1.1 大体积混凝土施工背景与意义 1
1.2 温度裂缝控制技术研究现状 1
1.3 本文研究方法与技术路线 2
第2章 温度裂缝形成机理分析 3
2.1 混凝土水化热特性研究 3
2.2 热应力与温度场分布规律 3
2.3 材料性能对裂缝的影响因素 4
2.4 施工环境对温度裂缝的作用 4
第3章 温度裂缝控制关键技术 6
3.1 配合比优化设计策略 6
3.2 冷却水管布置与效果评估 6
3.3 表面保温措施及其实施方法 7
3.4 施工过程中的温控监测技术 7
第4章 工程案例与应用验证 9
4.1 实际工程概况与条件分析 9
4.2 温度裂缝控制方案设计与实施 9
4.3 监测数据采集与结果分析 10
4.4 控制效果评价与改进建议 10
结论 12
参考文献 13
致 谢 14
