Abstract: By analying the necessity of establishment of sewage purification based on the example of the building of 2#tunnel in Xi-Han highway．a construction project about multilevel deposition pool to purify sewage is brought forth and the design method is introduced as well as the sewage purification equipment．

Key words: highway construction scene, disposal of sewage, deposition pool

摘要： 分析公路施工现场设置污水净化处理设施的必要性；结合西汉高速公路2#隧道施工现场实例，提出了采用多 级沉淀池沉淀的方法进行污水净化处理的施工方案；fi-绍该施工方案的污水净化设备、设计计算方法．

关键词: 公路施工现场, 污水处理, 沉淀池