Abstract

The present invention relates to a top-down construction method which directly withstands earth pressure by means of an underground part (beam, slab) of a building while excavating, to construct the underground part of the building. More particularly, the present invention relates to a method for constructing the underground part of the building in a top-down method and continuously constructing an underground retaining wall in a bottom-up method using a branch-type steel frame with channels. The top-down construction method according to the present invention is technically characterized in that the branch-type steel frame with channels assembled thereto is installed between an earth-retaining wall and a slab in the construction of the underground part of the building so as to effectively transfer earth pressure, and the underground retaining wall is continuously constructed in a bottom-up method after ensuring the space for construction of the underground retaining wall.

IPC Classes  ?

• E02D 29/045 - Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location lineMethods of making them
• E21D 9/04 - Driving tunnels or galleries through loose materialsApparatus therefor not otherwise provided for