MONOLITHIC CONSTRUCTION METHOD OF UNDERGROUND SECTION OF EXTENDED CONCRETE STRUCTURE DIRECTLY CONNECTED TO EXISTING CONCRETE STRUCTURE

摘要

PURPOSE: To incorporate the H-shaped steel used in an earth retaining wall removed coventionally to provide the H-shaped steel between an underground skeleton of the existing concrete struction and an underground skeleton of an extended concrete structure and combine the underground sections of both concrete structures with each other. CONSTITUTION: Stud connectors 6 are provided in a row to a frange 5 on the existing structure 1 side of an H-shaped steel 3 in a soil column strip earth retaining wall to construct a beam 7, an underground exterior wall 4 and a column 8. Stud connectors 11 are provided in a row to a flange 10 on an extended structure 9 side to construct the underground exterior wall 14 without having any column, and underground sections on both sides of the H-shaped steel 3 are formed together as a unit. Stud connectors are provided in a row to flanges on both front and rear sides of the H-shaped steel 3 in advance, they are coated with an insulation coating of soil cement and are used for a core, the core is inserted in the earth retaining wall, the soil cement and insulation coating are eliminated to construct the underground exterior wall and underground exterior wall without column, and the underground sections on both sides are combined with each other through the H-shaped steel.