论文部分内容阅读
珊溪水库混凝土面板堆石坝一期面板最大长度为 144m ,属国内一次性连续浇筑的最大长度 ,对普通混凝土来说 ,产生裂缝是不可避免的。但十二局施工科研所通过对珊溪水库面板混凝土防裂技术研究 ,增加了限制膨胀率e这个参数 ,即 2 81× 10 -4 ≤e≤ 6 73× 10 -4 ,有效地控制了收缩补偿和膨胀限制 ,从而避免或减少了由于面板混凝土收缩而引起的裂缝。经检验未发现裂缝 ,取得了预期的防裂效果。
The maximum length of the first phase of the Shanxi Concrete Reservoir Face Rockfill Dam is 144m. It belongs to the longest one-time continuous pouring in China. For normal concrete, cracks are inevitable. However, through the research on anti-cracking technology of concrete face of Shanxi Reservoir, the 12th Bureau of Construction Research Institute increased the parameter of limiting expansion rate e, that is, 2 81 × 10 -4 ≤e ≤ 6 73 × 10 -4, effectively controlling the shrinkage Compensation and expansion restrictions, thus avoiding or reducing the panel concrete shrinkage caused by cracks. After the test found no cracks, achieved the desired anti-cracking effect.