Deep pneumatic caisson unmanned operation excavator was break up into different parts, and send into the pneumatic caisson. The hydraulic tank and cooling system module into the pneumatic caisson.

                          The slewing mechanism was being into the pneumatic caisson.

                                  The working device was being into the pneumatic caisson.

After all parts in the pneumatic caisson , the material mouth of caisson will be strictly sealed and fitted with screw device. Another, the staff spiral stairs next to the material mouth will also be sealed and installed decompression chamber.

When all the parts were hanging into the caisson, workers entered the caisson and equipped with excavators about cost 3-5hours

More than one remote control excavators assembled just after the completion were working. At this time the pneumatic caissons had not yet begun sinking,and caisson had not been filled into the air pressure inside. As the caisson sank, gradually it was filled into the pressure.

In the proving ground, through supervisory console, the workers are control the excavators which were located at depths of 30 meters underground on the ground floor by controller handle.