铁路下立交要考虑排水，排水泵房是下立交的重要组成部分。泵房电气设计是否合理可靠关系到排水泵房能否可靠运行，设计时必须根据排水泵房的特点充分考虑各种因素。1确定排水泵房的负荷等级泵房的负荷等级应该根据泵房的工程规模和重要性来确定。对于规模较大和比较重要的立交 Under the railway interchange, drainage should be considered. The drainage pump room is an important part of the underpass. Whether the electrical design of the pump house is reasonable and reliable relates to the reliable operation of the drainage pump room, and various factors must be fully considered in the design according to the characteristics of the drainage pump room. 1 Determine the load level of the drainage pumping house The load level of the pumping house should be determined according to the size and importance of the pumping house. For larger and more important interchanges