松月碾压混凝土坝加高关键技术研究

松月工程地处严寒地区,大坝一期为碾压混凝土重力坝,二期坝体加高采用贴坡式加高、加厚的方式。寒冷地区碾压混凝土浇筑施工具有不同于其它地区的特点和规律,寒冷地区碾压混凝土坝的加高国内外尚无先例,因此,必须对大坝加高过程中所涉及的关键问题进行深入研究。针对松月工程的实际情况,就大坝加高的断面设计、材料分区、新老坝体结合面的结构型式、仿真应力分析和温度控制防裂等关键问题进行了研究,研究成果将用于松月碾压混凝土坝的加高工程中,并可供其他类似工程参考借鉴。

Key technology for dam heightening of Songyue RCC dam

The Songyue RCC dam is situated in the high cold region.The first-stage project is RCC gravity dam,and the second-stage project will adopt the attaching slope method to heighten and thicken the dam.The characteristics of the construction of RCC concrete in high cold areas are different from those in other regions.And the RCC dam heightening in cold regions has no available examples at home and abroad.So the key problems corresponding to the dam heightening must be studied deeply.On the basis of the practical situation of the Songyue project,the researches were carried out for the key problems such as the section design for the dam heightening,the material partition,the structural shape for the junction surface of the old and new concrete,thermal-stress analysis,and temperature control for preventing cracks.The study results will be applied in the Songyue dam heightening construction and would be helpful to other similar projects.