The paper introduces the bed leveling technique with underwater rail suspended on barge and positioned by GPS in deep water channel regulation works at estuary of Yangtze River.

介绍了基床悬吊刮道GPS定位整平工艺在长江口深水航道治理工程中的应用情况，着重介绍了工作原理、施工准备、施工步骤、技术要求和特殊情况下的施工问题。