Abstract: The intake tunnel of Kontum project is a long tunnel with reverse slope. In tunnelling process, large flow underground water was encountered which exerted adverse influence on construction. This paper introduced the underground water, pumping equipments and electrical equipments, worthy reference.

Key words: long tunnel, reverse slope, drainage, pump

摘要： 上昆嵩引水隧洞为大反坡长隧洞，在掘进过程中，遭遇了稳定大流量地下水，严重影响了施工工期。简要介绍出水情况、抽排水设备和电力设备配置，对大反坡的长隧洞抽排水设计和施工具有一定的参考意义。

关键词: 长隧洞, 反坡, 排水, 水泵