中文摘要：

长洲3-4号船闸为我国目前闸室平面尺度最大、采用相互灌泄水的省水船闸,与已建1-2号船闸同岸并列布置.由于受坝线上下游已建或在建桥梁通航桥孔、施工期1-2号船闸正常运行、岸侧居民企业已有建筑物等因素影响,3-4号船闸平面布置成为工程投资及工程运营条件的关键.对3-4号船闸平面布置影响因素和可能的平面布置方案进行了分析研究,对推荐方案进行了总结,阐述了船闸布置的一般要求和长洲3-4号船闸布置的特殊要求.

英文摘要：

Changzhou locks No. 3 and No. 4 will be the biggest locks in China in terms of lock plan dimensions. They are designed to be interconnected twin locks and adjacent to locks No. 1 and No. 2. The layout of locks No. 3 and No. 4 is limited by the bridges upstream and downstream of the lock, the normal operation of locks No. 1 and No. 2 during the new locks construction, and local residents and industrial facilities. So the layout of newly built locks will be the key factor for investment and operational conditions. The factors which influence the layout of locks No. 3 and No. 4 are analyzed in the paper. The possible schemes of layout are studied. The recommended scheme is put forward with general requirements of lock layout and the special requirements of Changzhou locks No. 3 and No. 4.