锅炉特大体积混凝土基础施工技术研究——以灵武电厂二期2×1000MW工程4#锅炉筏板基础为例

大体积混凝土开裂后,其性能与原状混凝土性能相差很大,尤其是对耐久性(渗透性)的影响更大,而混凝土渗透反过来又会加速和促使混凝土的进一步恶化,严重影响结构的长期安全和耐久运行。因此,我们从合理选择施工材料,优化混凝土配合比,优化混凝土的供应,采用科学的施工方法,加强混凝土养护等方面介绍了大体积混凝土施工技术,以达到降低混凝土温度应力和提高混凝土本身抗拉性能的目的。

After mass concrete cracked, the performance of the original concrete properties vary greatly, especially the durability （permeability）. Furthermore the permeability of concrete in turn will accelerate and make further deterioration to concrete , and seriously affect the long-term safety and durability of structure operation. Consequently ,the article introduces the construction technical of mass concrete from the aspect of the reasonable selection of construction materials, the optimization of the concrete mix proportion and supply, the adoption of the scientific construction methods, the strengthen of concrete curing, in order to reduce the temperature stress of concrete and improve concrete tensile performance.