CONSTRUCTING METHOD OF TEMPORARY RETAINING WALL IN UNDERWATER GROUND BY SUCTION PRESSURE

The present invention relates to a method of constructing a temporary retaining wall to the underwater ground by suction pressure and a tubular member connecting structure using a tube connection member capable of easily connecting and disconnecting upper and lower tubular members in a watertight state. A steel pipe having a large cross section is installed on the underwater ground to use the steel pipe as the underwater temporary retaining wall. When the steel pipe is installed on the underwater ground, the steel pipe is inserted into the underwater ground by the suction pressure to be used as the temporary retaining wall or a water work platform, so that the steel pipe of the large diameter can be easily installed underwater, without piling. After the usage of the steel pipe as the temporary facility is finished, the steel pipe can be easily pulled out from the underwater ground by increasing the pressure in the steel pipe and using a pullout force formed by the increased pressure.