Stopper construction method of temporary shut-off structure used for repairing and reinforcing bridge pier

摘要

PROBLEM TO BE SOLVED: To provide a water cut-off method for a cofferdam structure used in bridge pier repair/reinforcement work that readily realizes a complete water cut-off state that prevents water infiltration into the cofferdam structure.;SOLUTION: A cofferdam structure 2 is constructed to surround an outer periphery of a bridge pier 1, the cofferdam structure having a through-hole part 3, through which the bridge pier 1 penetrates and is disposed, formed at a bottom part at a non-submerged location in an upper part of the bridge pier 1. The cofferdam structure 2 is submerged underwater below the bridge and a gap 4 between the through-hole part 3 and the bridge pier 1 is closed with concrete leakage prevention means 5. Then, concrete 6 is filled in the gap 4, and the gap 4 is sealed and water is cut-off as the concrete 6 hardens.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT