clogged sand layer

例句：

1. 1. The river was so deep that it had a layer of clogging sand on the bottom.
   河水非常深，底部有一层堵塞的沙。
2. 2.The engineer carefully removed the clogging sand layer to reveal the underlying rock.
   工程师小心翼翼地移除了堵塞的沙层，露出了下面的岩石。
3. 3.The construction crew had to deal with the clogging sand layer during the excavation process.
   施工队伍在挖掘过程中不得不处理堵塞的沙层。