风化花岗岩开挖弃料配制三峡二期围堰防渗墙材料

本文介绍了三峡二期围堰防渗墙柔性材料的研制过程。采用三峡坝区开挖弃料-花岗岩风化砂代替塑性混凝土中的砂石骨料，用当地黏土代替膨润土，配制防渗墙柔性材料，通过均匀设计理论和人工神经网络技术相结合的方法对该材料的配合比进行了优选，满足了三峡二期围堰防渗墙的设计要求，该材料已运用于三峡工程二期围堰，效果良好。

Plastic concrete for cutoff wall using weathered granite sand in stage II cofferdam of Three Gorges Project

The weathered granite sand is adopted as the aggregates of plastic concrete for cutoff wall in cofferdam of the Three Gorges Project. The local clay is added into the concrete to make it flexible. The uniform design theory and artificial neural network are applied to optimize the mixing proportion to meet the design requirements. The proposed concrete was successfully used in the Project.