The underground diaphragm wall in Yellow River Undercrossing Project of the Middle Route in the South-to-North Water Diversion is the deepest and thickest one in China.

南水北调中线穿黄工程地下连续墙是国内最深最厚的地下连续墙,地质条件差,施工难度大,施工中存在较大的风险。