Difference Between Open Caissons and Pneumatic Caissons

Difference Between Open Caissons and Pneumatic Caissons

Difference between well or open caissons and pneumatic caissons are as follows:

Wheel Barrow
Wheel Barrow

1. Structure

➤ Open caissons are box-type structures having their top and bottom open.

➤ Pneumatic caisson consists of an enclosure open at the bottom and closed at the top.

2. Cost

➤ Open caissons are relatively cheaper than pneumatic caissons.

➤ Pneumatic caissons are relatively costlier due to the use of compressed air in the working chamber.

3. Inspection

➤ Inspection and cleaning process at the bottom of the caisson can not be carried out in case of open caissons.

➤ But in the case of pneumatic caissons cleaning and testing process can be easily carried out, as the working chamber is dry.

4. If boulders are faced during construction

➤ The construction process will be slow and difficult if the boulder met during construction.

➤ No problem arises in case of Pneumatic Caissons.

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Box Caissons

Use of Cofferdams