The excavation of the right slope of the approach channel for the inlet of the spillway tunnel in Heihe Water Control Project has a significant effect upon the construction quality and the cost of the project.

• 摘要黑河水利枢纽右岸溢洪洞进口引渠右岸边坡的开挖方案，是影响该工程质量和造价的突出问题。