BUILDING METHOD OF HIGH WALL BLOCK FOR LARGE SCALE UNDERGROUND STRUCTURE USING EARTH ANCHOR REPRESTRESSING

摘要

PURPOSE: A method for constructing a retaining wall for a large underground structure through the tension of earth anchors is provided to secure a wide underground work-space without using support beams. CONSTITUTION: A method for constructing a retaining wall for a large underground structure through the tension of earth anchors is as follows. A cast-in-place pile(10) is constructed on the ground. The earth anchors are successively constructed by tensioning a tension member fixed to the ground. The tensile force applied to the tension member(20) is released, and a wale is unlocked from the tension member. An earth anchor sleeve is inserted into an upper part of the tension member, and contacts with the cast-in-place pile. A form is installed at a constant distance from the cast-in-place pile, and concrete is placed into the gap such that the retaining wall is built(50). The tension member is tensioned again by the earth anchor. The tension force applied to the tension member is removed, and earth anchor is removed from the earth anchor sleeve. Fillers are filled in the earth anchor sleeve to prevent a flood.