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混凝土宽缝重力坝采用柱状分块法浇筑,需将各坝块冷却到灌浆温度,块间的接缝随着坝块冷却收缩而张开,然后用水泥灌浆接缝填实,使大坝在运转时起整体作用。控制灌浆温度的目的,是为了防止坝块在灌浆以后,由于外界温度的影响,使已灌缝面产生危害性温度应力而将接缝重新拉开,避免对坝体整体断面的应力,特别是上游而的应力产生不利的影响。目前国内外混凝土重力坝一般根据运转期的条
Concrete wide-gap gravity dam using columnar block method of pouring, the dam cooling to the grouting temperature required, the joints between the blocks cooled and contracted with the open expansion, and then filled with cement grouting joints, the dam in the Operate from the overall effect. The purpose of controlling the grouting temperature is to prevent the dam block from re-drawing the joint due to the influence of outside temperature after the grouting, to re-open the joint to prevent the stress on the whole section of the dam, in particular, The upstream stress has a negative effect. At present, concrete gravity dam at home and abroad are generally based on the period of operation