How to construct a dam corridor

摘要

PROBLEM TO BE SOLVED To provide a technique for further improving the filling property of concrete to the lower side of the bottom surface of a corridor cell.SOLUTION: A corridor cell of the dam corridor on the cut-off wall concrete of the front lift is provided with a mount for placing a stand for placing a precast corridor cell having a plurality of holes on the bottom surface thereof A step of installing a corridor cell on which the corridor cell is placed on the gantry, a space under the bottom surface of the corridor cell placed on the gantry, a circumference below the bottom surface of the corridor cell, And a step of placing concrete around the corridor cell to embed the corridor cell, wherein in the step of setting the concrete, while confirming the filling condition from the plurality of holes, Place the concrete in the gap below the bottom of the corridor cell.(FIG.