高纬度沿海地区的核电厂冬季运行时常会遇到取水口结冰问题，影响正常运行，一种解决方案是通过多孔排水管将电厂循环水引至泵站前池，提高水温，防止取水水域冰塞的发生。建立了虹吸井多孔排水管物理模型，研究了多孔排水管的水力特性，包括沿程压力分布特点，压差变化规律等，提出了多孔短管内部压力变化的无量纲公式，各试验工况计算值和实测值的最大平均误差为0.88 %。研究表明：⑴多孔排水管压力恢复现象是流速水头向压力水头转化的结果，且流速水头越大，压力恢复现象越明显。⑵出水管压力水头在下游出现突升现象，是多孔管中流线在出水管处发生偏移，部分水流对下游冲击造成的。试验结果为类似多孔排水管的设计及应用提供参考依据。

Intakes of nuclear power plant in high-latitude coastal regions generally have ice problems that will affect their normal operation. One solution is to transport warm water to the forebay of pump stations through perforated drain-pipes. This method can raise water temperature and prevent ice jam. A physical model of perforated drain-pipe was used to study its hydraulic characteristics, including pressure distribution and velocity distribution. A non-dimensional formula of pressure distribution within the perforated drain-pipe was proposed and the maximum average error was 0.88%. The study shows that the pressure recovery within the perforated drain-pipe is caused by transformation from velocity to pressure. The larger the velocity, the more obvious the pressure recovery. The pressure of the downstream drain-pipe is larger than that of the upstream because the streamline is skewed near the outlet. The study results can provide references for the design and application of perforated drain-pipes.