巴基斯坦阿莱瓦水电站引水隧洞分级接力出渣施工技术

Step-by-step Mucking Technology in Diversion Tunnel of Allai Khwar Hydropower Station in Pakistan

结合巴基斯坦阿莱瓦水电站引水隧洞纵坡为38.27%斜井段的特殊施工条件,介绍卷扬机分级接力出渣施工技术的设计与应用。在长达2年开挖与支护施工期间,特别是在首次采用多循环、多工序,而且复杂的有轨分级接力运输出渣模式下,未发生重伤以上安全事故。该施工技术获得业主的高度评价。

The paper introduces the design and application of step-by-step mucking by winch in combination with the special conditions for constructing the inclined section （with longitudinal slope of 38.27% ） of power tunnel of the project. No major safety accidents occurred during two years＇ excavating and supporting construction, even under the multi-cycle, multi-process and complicated railed step-by-step mucking mode for the first time. This construction technology receives high appraise from the EmDlover.