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针对已建200 m级高面板堆石坝出现的问题,结合洪家渡坝工程特点,开展了坝体变形特性及控制技术研究。探讨了200 m高坝变形规律与特点,从筑坝材料选择、堆石结构分区及填筑施工等方面进行坝体变形控制,提出了堆石预沉降控制量化指标,提高堆石压实度、坝内陡边坡整形与设增模碾压区、填筑施工总体平衡上升等变形控制集成技术,并应用于洪家渡坝,取得了坝体变形小、面板无结构性裂缝和坝体渗漏量小的良好效果。
In view of the problems of the existing 200 m-high CFRD, combined with the characteristics of Hongjiadu dam project, the research on the deformation characteristics and control technology of the dam is carried out. The deformation law and characteristics of 200 m high dam are discussed. The deformation control of dam body is carried out from dam material selection, rockfill structure division and filling construction. The quantification index of pre-settlement control of rockfill is proposed to improve the compaction degree of rockfill. Dam steep slope plastic deformation and set by the Ministry of RCC, the overall construction of balanced rise in deformation control integrated technology, and applied to Hongjiadu dam has made a small deformation, the panel without structural cracks and dam seepage Low leakage of good results.