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水利工程中的混凝土闸墩,由于混凝土的抗拉强度较低,热传导性能差,温度变形受到约束等,常在施工或使用过程中出现裂缝,破坏闸墩结构的整体性,影响建筑物的安全和耐久性。从20世纪初混凝土坝建造初期开始,混凝土的裂缝问题始终是一个世界性的难题。长期以来,各国的工程技术及科研人员结合实际工程进行了大量的研究工作,对大体积混凝土的温控和防裂提出了较成熟的工程措施,并在实际工程中加以应用,对大体积混凝土的温控和防裂起到了一定的作用。据山东省20世纪70年代的资料统计,已有20多座溢洪
Concrete pier in hydraulic engineering, due to the low tensile strength of concrete, poor thermal conductivity, temperature deformation constraints, often in the construction or use of cracks in the process, damage the integrity of the pier structure, affecting the safety of buildings And durability. Since the beginning of the construction of concrete dams in the early 20th century, the problem of concrete cracks has always been a worldwide problem. For a long time, a great deal of research work has been done by engineers and researchers from all over the world in combination with practical engineering. More mature engineering measures have been put forward for temperature control and crack prevention of mass concrete, and applied to practical projects. Massive concrete The temperature control and cracking play a role. According to statistics from the 1970s in Shandong Province, more than 20 overflow spills have occurred