Pneumatic caisson box inner pipe lid removal method and pneumatic caisson construction method for filling concrete

摘要

PROBLEM TO BE SOLVED: To provide a method for removing a pneumatic caisson box inner pipe lid to reduce high pressure work in a pneumatic caisson method. SOLUTION: In the pneumatic caisson construction method, a piping lid 4 provided in a high pressure work room 2 is removed, which is a method for removing a pipe lid 4 in a pneumatic caisson box, from a pipe 3 connected to the high pressure work room 2 to the inside of the high pressure work room 2. The pipe lid 4 inserted into the pipe port of the pipe 3 is removed by pumping air having a pressure higher than the pressure of the above. [Selection diagram] Fig. 1