高寒地区土石坝沥青混凝土心墙冬季施工技术

库什塔依水电站施工工期比较紧张,为了满足上游围堰2011年4月30日具备度汛条件,上游围堰沥青混凝土心墙必须在冬季低温条件下连续施工。介绍了冬季施工设备及其保温措施,从拌和、摊铺、碾压等方面综述了冬季沥青混凝土施工工艺。心墙钻芯取样结果表明,施工质量满足规范及设计要求。

Asphalt Concrete Core Wall Construction in Winter for a Embankment Dam in Severe Cold Region

As the tight construction period of Kushtayi Hydropower Station,and because the upstream cofferdam must meet the requirements on flood control before April 30,2011,the asphalt concrete core wall of upstream cofferdam must be continuously constructed under low temperature in winter.The construction equipments in winter and corresponding insulation measures are introduced and the construction technologies are detailed from the aspects of mixing,spreading and roller-compacting.The samplings of wall core show that the construction quality meets the requirements of specification and design.