吴世然,刘广鑫,陈育权,卢文波,张珂,陈明

• 1:中国电建集团中国水利水电第三工程局有限公司
• 2:武汉大学水资源与水电工程科学国家重点实验室
• 3:中国水利电力对外有限公司

摘要(Abstract)：

溢洪道的开挖成型质量对后期工程的运行安全有着重要影响,基于老挝南公1水电站非衬砌溢洪道岩体开挖,针对溢洪道开挖中的四个关键部位,提出并采用了不同的爆破开挖技术,取得了良好的开挖效果并积累了丰富的工程经验。现场开挖结果表明:深孔预裂爆破技术能够很好地解决溢洪道高边坡的轮廓开挖成型控制难题,爆后轮廓面清晰可见、开挖成型质量优良,且半孔率和最大起伏差均满足设计要求;消能-聚能联合控制爆破技术在消力池底板开挖中得到成功应用,获得良好开挖成型效果的同时,大大加快了施工进度;对于消力池尾坎这种特殊部位的岩体开挖,上下游面采用深孔预裂一次开挖成型、顶部水平面采用水平预裂+垂直孔的轮廓开挖技术,能够很好地解决尾坎的开挖成型控制难题;对于类似闸室跌坎段这样具有开挖成型质量要求的小台阶爆破区域,大孔径小梯段的爆破技术并不是很适宜,应优先采用小孔径小梯段的控制爆破技术。

关键词(KeyWords)： 溢洪道;爆破开挖;关键部位;开挖成型效果

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金面上项目(51779190、51979205);; 中国博士后科学基金项目(2020M672311、2020T130569)

作者(Author): 吴世然,刘广鑫,陈育权,卢文波,张珂,陈明

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