基于发泡聚氨酯对大坝保温的研究

Research on heat insulation of a dam based on foaming polycurethane

佛子岭混凝土连拱坝裂缝产生的主要原因是混凝土的温度变形和早期混凝土的干缩变形,文章介绍了保温层的工作原理,研究了裸露坝体的温度效应、表面有保温层的坝体温度效应;研究表明采用发泡聚氨酯对大坝进行保温,能有效地降低大坝的温度应力。

The main factors that cause cracks in the Fuziling multi-arch concrete dam are temperature deformation and desiccation deformation of the concrete in its earl period. This paper introduces the working principles of thermal insulation, and researches the temperature effect of the bare dam and the thermal insulation on the dam surface. The results show that the temperature stress of the dam is reduced effectively when the dam is heat-insulated by foaming polycurethane.