易小英

某水电站压力钢管在厂内制作成单段，运输到安装室，由桥式起重机吊到厂房上游墙导流洞出口，通过平板台车拉入洞室实行组装，精简了运送方法，达到了迅速组装;压力钢管输送和组装同同类项目比较，不需加强施工支撑洞增挖工程量，节省了项目投资成本;投入运输后的车间上游墙体无渗水现象，充分证明引水隧道设计和施工计划科学且项目质量良好。

某水电站  钢衬段  施工技术  引水隧道

Abstract： The penstock of a hydropower station is fabricated into a single section in the plant and transported to the installation room. It is lifted to the outlet of the diversion tunnel of the upstream wall of the plant by the bridge crane and pulled into the tunnel by the flat trolley for assembly. The transportation method is simplified and the rapid assembly is achieved; compared with similar projects， the transportation and assembly of penstock do not need to strengthen the construction support tunnel and increase the excavation quantity， which saves the project investment cost; there is no water seepage in the upstream wall of the workshop after being put into transportation， which fully proves that the design and construction plan of the headrace tunnel are scientific and the project quality is good.

Key Words： A hydropower station; Steel lining section; Construction technology; Diversion tunnel

坐落在四川省小金县境内沃日河上的春堂坝水电站，属于导流电站，在沃日河干流日尔-春堂坝段，属阶梯计划和开发的第四层次，它的取水中心在沃日河上，通过长大概13 054.20m的导流洞，由左岸取水后到达小金河上发电车间。本电站为引水电站，蓄水库日调。

压力钢管的生产是在某电站的钢管加工厂完成的。采用单管接头交付安装，装配单元最大重量大概25t（不含内支撑组织重量）。

压力管道宽3m，周长大概25.236m，每段压力管道由两块同样长的瓦构成，长度大概12.618m，在现实生产中，应根据设计图进行切割。钢管瓦片生产步骤是：确定板材材质、划线、开料前的检查、开料、卷板前的检查、卷板的检查、卷板后的检验等。钢管瓦片通过手自一体切割机进行气割开料。瓦片纵向缝和管段装配周向缝的直边焊缝坡口的准备，选择坡口刀具，或手自一体刀具的火焰切割方法制作准备，并通过磨床进行研磨。

管道接头装配在圆形装配平台上，用自主设计的专门夹具对瓦片纵向接头的空隙和错位进行调节。……