In three desilting tunnels of Xiaolangdi Multipurpose Project, over 70% tunnel wall were lined with non cohesive pre stressed concrete by the post tensioning method.

 
  • 小浪底水利樞紐工程的3條排沙洞,洞身70%25以上采用后張法無(wú)粘結預應力混凝土襯砌。
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