CONSTRUCTION METHOD FOR SOFT REMOVABLE GROUND ANCHOR USING EXTENSION WING ATTACHED INNER LOWER BODY

摘要

PURPOSE: A construction method of a removing type ground anchor for poor ground using an inner lower body on which an expansion wing is mounted is provided to minimize a loss of a tensile force after tensioning and to improve a drawing resistance force through the resistance of a ground wedge and the resistance of ground pressure of an enlargement bulb. CONSTITUTION: A boring hole is formed in the ground with a casing, and grout is injected into the casing. A ground anchor is inserted into the casing. The casing is pulled out, and an expansion wing(16) is spread with a restitution force of a wing spring and is embedded in the ground. The ground anchor is tensioned through a tension member and reams a predetermined section of the end of the boring hole. Grout is injected into the reamed space so that an enlargement bulb is formed.