| 摘要: |
| 中国是世界上拥有水库大坝最多的国家。大体积混凝土大坝施工时内外大温差会造成混凝土的开裂,寒冷环境下大坝运行时冰的冻融过程会对混凝土造成胀裂破坏,因此寒冷环境下混凝土大坝浇筑时必须采取临时保温措施,大坝运行时必须采取永久保温措施,且大坝上游面接水部位必须采取抗冰拔措施。本文综述了寒冷环境下国内混凝土大坝的保温和抗冰技术的现状,提出了目前大坝保温抗冰技术存在的问题和需要继续研究的内容。 |
| 关键词: 大坝，混凝土，保温材料，抗冰破坏，聚苯乙烯，聚氨酯，寒冷环境 |
| DOI： |
| 分类号: |
| 基金项目:国家重点研发计划：“高寒区高混凝土坝全生命期智能监控平台研发与技术集成示范应用”( 编号：2018YFC0406706)、”高寒复杂条件下混凝土坝新型防护和耐磨材料及施工工艺研究”(编号：2018YFC0406702)。 |
|
| Current situation of thermal insulation and ice resistance technology of dam concrete in China under cold environment |
|
ZHAO Chengxian1, SUN Hongyao2, PAN Xuyong1, LUO Jianhua1, PEI Chengyuan1, LI Hongxin1
|
|
1.Xinjiang Erqis River Basin Development and Construction Administration Bureau;2.Nanjing Hydraulic Research Institute,State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering
|
| Abstract: |
| China has the largest number of reservoirs and dams in the world. During the construction of mass volume concrete dam, the higher temperature difference between the inside and outside of concrete will cause the cracking of concrete. During the operation of the dam under cold environment, the freezing and thawing process of ice will cause the expansion and cracking of concrete. Therefore, temporary thermal insulation measures must be taken during the pouring of concrete dam, permanent thermal insulation measures must be taken during the operation of the dam, and ice pulling resistance measures must be taken for the upstream water connection part of the dam. This paper summarizes the current situation of thermal insulation and ice resistance technology of concrete dams in China under cold environment, and puts forward the problems existing in the current thermal insulation and ice resistance technology of dams and the contents that need to be further studied. |
| Key words: Dam, concrete, thermal insulation material, ice resistance, polystyrene, polyurethane, cold environment |
