The present invention discloses an underwater building unit and its installation
and application methods. It includes a caisson with both ends open and is composed
of two rows of box boards being not intersected with each other. Each row of box
boards consists of a set of stake-plate body combinations and the bind members
between every two adjacent stake-plate body combinations. A positioning beam is
located on the top of the box boards and connects the two box boards. There is
a cross rib at the middle part of the outer surface of each bind member. The open
caisson is made up of small components of low weight. So it is easy for installation
and could be extended unlimitedly as required. In addition, the underwater building
unit has low underwater condition requirement and is relatively stable, thus the
underwater building is quite firm and has a long life. Each component of the open
caisson can be industrially manufactured on land so as to lower the cost and free
of the influence of stormy waves.
