Submergence construction method of the shell and portable die blockade device null inside the pipe conduit which is used for

摘要

PROBLEM TO BE SOLVED: To avoid decrease in a pipe body guide force, even though performing a connection work, after a third pipe body and to reduce the amount of remaining stabilizing liquid in a laid pipe body. ;SOLUTION: When performing the connection for the pipe body PU2 after a third pipe body, a blocking device 10 is moved to the inside of the pipe body PU at the end in the pipe bodies for which the laying and connection have been completed, and the connection is carried out by suction via the suction pipe 12 from the relevant position.;COPYRIGHT: (C)2001,JPO