Development of the Automatic System for Pneumatic Caisson

The pneumatic caisson method is applicable in any type of ground and permits the ground being excavated to be observed directly, hence it provides a reliable foundation. However, since the working chamber is put under high pressure, high temperature, and high humidity, his method requires robust, experienced workers. On the other hand, the aging of skilled workers and the shortage of younger workers have become a social problem in these years. This is especially serious in foundation work using the pneumatic caisson method which involves hard work under high pressure. In view of the above situation, the Ministry of Construction conducted a joint research with several private companies on technology for automatically removing excavated materials in the pneumatic caisson method as part of its comprehensive technical development project and has come up with a new pneumatic caisson method.