Patent ID: 8052408
Filing Date: 2011-11-08
Classification: E01D,E04C

Abstract:
1. A two-way pre-stress system for applying pre-stress to a member of a structure by a pre-tendon method, the system comprising: a mold for forming the member, the mold having a concrete pouring space; a supporter installed outside the mold; at least one horizontal tendon installed in the mold in a horizontal direction; a horizontal tendon settling device installed at the supporter, for settling the horizontal tendon in the mold; at least one vertical tendon installed in the mold in a vertical direction; a vertical tendon settling device installed at the supporter, for settling the vertical tendon in the mold; and a bending device installed at the supporter and combined with at least one vertical tendon of the at least one vertical tendon, for forming a bent portion in at least one vertical tendon in a deep portion of the member; wherein the bending device comprises: a base portion installed at the supporter; a body portion installed at the base portion and positioned between the supporter and the mold; a tendon supporting portion installed in the body portion, the tendon supporting portion penetrating a through-hole in a bottom surface of the mold, and supporting the vertical tendon, for bending the vertical tendon; and a detachable supplementary supporting member installed between the body portion and the tendon supporting portion which limits a rotation of the body portion in a horizontal direction; wherein the body portion is coupled with the base portion by a hinge unit for horizontal rotation so that the body portion may be rotated in a horizontal direction with respect to the base portion.