A CAVERN PILLAR STRUCTURE USING GIRDERS AND PRESTRESSED PANELS

摘要

PURPOSE: A pillar support structure using a girder support member and a pressurization panel is provided to supply a stable pillar unit by using the existing ground in a construction condition in which a pillar unit is narrowly formed. CONSTITUTION: A pillar support structure using a girder support member (160) and a pressurization panel (130) comprises a lining layer (110b), a tie rod (120), the pressurization panel, a dowel bar (140), and the girder support member. The lining layer is constructed on an excavation surface (10) of a parallel tunnel. The tie rod is constructed in a pillar unit (P) between the parallel tunnels so that prestress is applied. The pressurization panel is anchored on both ends of the tie rod in an inner circumference of the pillar unit. One end of the dowel bar is inserted into the lining layer, and the other end of the dowel bar is inserted into the excavation surface of the parallel tunnel. The girder support member is installed in the lining layer and is constructed on the upper part of the pillar unit by penetrating the pillar unit.