53.什么是沉井?它适用于哪些工程?沉井实质上是一种深基础,适用于上部荷载大而集中的建筑物,如桥墩、大型水泵房等。也有的根据使用性质来决定,如取水用的大口井等。54.沉井一般由哪几部分组成?沉井一般由刃脚、井身、隔墙、凹槽、井底、井盖等部分组成,但根据使用要求的不同,每一 53. What is a caisson? Which project does it apply to? The caisson is essentially a deep foundation and is suitable for buildings with large upper loads, such as piers, large pump rooms, etc. Some of them are determined based on the nature of their use, such as large wells for water intake. 54. What is the general composition of the open caisson? The caisson is generally composed of the cutting edge, wellbore, partition wall, groove, well bottom, well cover, etc., but according to the different requirements, each