桥梁水下基础施工防水方法较多，当施工钻孔桩或扩大基础时，可以不用钢板桩围 堰,而代之以轻便得多的钢套箱。本文较为系统的介绍了钢套箱的设计、制作、安装、防水等施 工工艺以及其适用范围、注意事项等，并进行了效益分析，列举了工程应用实例。

There are much more waterproofing methods for building underwater bridge foun?dations* During constructing the bored piles or enlarging the foundations，the lighter and more convenient steel jacket box may be used instead of using the steel sheet pile as the cof-ferdam. The paper introduces systematically the design and the manufacture of the steel jacket box，the engineering technique of its installation and waterproofing * the scope of its applications，the matters needing attention，etc.