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重力坝混凝土的抗裂性、温度控制和标号选择是水工混凝土设计施工中急待解决的重要问题.经过近几年来的工程实践,在这方面发现了不少新问题需要研究解决,主要的有: 1.是否需要对重力坝混凝土提出抗裂要求?如需要应如何提出? 2.提高标号对改善混凝土抗裂性有多大好处? 3.如何认识和分析降温措施、混凝土性能和施工工艺对抗裂性的综合影响? 4.提高混凝土抗裂性应遵循什么途径? 结合西北地区一重力式高坝的设计施工,我们综合考虑了混凝土的温度应力、材料性能及施工工艺各方面的因素,从理论上进行了分析,试图比较全面地阐明上选有关问题.
Gravity dam concrete crack resistance, temperature control and label selection is the hydraulic concrete design and construction of an urgent problem to be solved.After the engineering practice in recent years, found in this regard, many new problems need to be studied and solved, the main There are: 1. Whether the need for concrete gravity dam anti-cracking requirements? If so how should be proposed? 2. To improve the marking on the crack resistance of concrete to improve how much? 3. How to understand and analyze cooling measures, concrete performance and construction technology confrontation How to improve the crack resistance of concrete? In combination with the design and construction of a gravity dam in Northwest China, we have comprehensively considered the factors of temperature stress, material properties and construction technology of concrete, In theory, it analyzes and tries to clarify the relevant issues in the election on a more comprehensive basis.