Through analysis of water quality for 17 groups of drainage holes and bore holes, several conclusions are drawn:at 15 sections,ambient water caused mediam corrosion to sections F 1,14,10 and 20 and the gallery of section 28.

• 经对17组排水孔及钻孔进行水质全分析，得出以下结论：在15个坝段中，环境水对F1坝段、14号坝段、10号坝段、20号坝段、28号坝段护坦廊道存在中等程度的溶出性侵蚀。