【摘要】 金安桥水电站坝址地处中国西南横断山脉,冬季干燥少雨,夏季炎热多雨,全年高温时段持续时间长,年温差小,昼夜温差较大,对大坝碾压混凝土施工不利。为使运输、摊铺、平仓、碾压等工序满足质量要求,在施工中充分利用了具有缩短碾压混凝土层间间隔时间、用较小的浇筑强度覆盖较大的仓面、大规模循环流水作业等特点的斜层铺筑技术。经钻芯取样检验,斜层铺筑法施工质量与国内同类工程的平层铺筑法处于同一水平,且坝体内部的绝热温升控制优于平层铺筑法。更多还原

【Abstract】 Jin’anqiao RCC dam locates in mountain range in southwest China.The RCC construction is adversely impacted by the special climate in dam site of dry winter,hot and rainy summer,long-duration high temperature,small temperature difference in a year and large temperature difference between day and night.To ensure the construction quality of RCC,the inclined-layer placing technology was used,by which,the interval between layers can be shortened,a larger constructing surface can be covered with a smaller pouring intensity and large-scale flow process can be achieved.The core samplings show that the construction quality of inclined-layer placing is at the same level with that of horizontal layer placing in similar projects in China,and the temperature rise within the dam body is smaller.更多还原