1·The workers rammed piles into a riverbed .
工人们把木桩打入河床内。
2·First of all they rammed four piles into the ground.
首先他们在地面上打上四棵桩子。
3·It puts forward some key points of technique on compilation and evaluation for the bill of quantity of rammed and expanded piles.
提出了夯扩桩工程清单编制和估价中的若干技术要点。