ANNULAR COFFERDAM USING TAPERED SQUARE PIPES, TEMPORARY STRUCTURE FOR PIT EXCAVATION CONSTRUCTION, AND CONSTRUCTION METHOD

摘要

The present invention relates to a cofferdam structure. An annular cofferdam using tapered square pipes and a temporary structure for pit excavation construction, according to one embodiment of the present invention, include a plurality of tapered square pipes having a cross section formed in a trapezoidal shape, wherein each of the plurality of tapered square pipes has a coupling protrusion or a coupling groove formed on one surface thereof in a longitudinal direction, each of the plurality of tapered square pipes has a coupling protrusion or a coupling groove formed on the other surface thereof in a longitudinal direction, the plurality of tapered square pipes are assembled by the coupling of the coupling protrusions and the coupling grooves, and a long side between two parallel sides of a trapezoid is disposed on the outer side thereof and a short side is disposed on the inner side thereof.