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CONSTRUCTION METHOD FOR EXTENDING BULB OF THE GROUND ANCHOR BY POST GROUTING AND BULB EXTENDING APPARATUS BEING USED FOR THE SAME
CONSTRUCTION METHOD FOR EXTENDING BULB OF THE GROUND ANCHOR BY POST GROUTING AND BULB EXTENDING APPARATUS BEING USED FOR THE SAME
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机译:桩后注浆扩管施工及锚固扩管装置的施工方法
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摘要
The present invention relates to a method for expanding a bulb of an underground anchor pile, which generates crack on a grout bulb through a post-grouting process which repeatedly injects high pressure grout before the solidification of the bulb is developed after a first bulb is formed by using a gravity or a pressing method to inject the grout in a bored hole and which makes a high pressure grout material penetrate a crack gap to expand the bulb; and to a bulb expanding device used for the same. The method comprises a first step for performing pre-grouting after forming an anchor hole by boring the ground; a second step for inserting an anchor into the anchor hole, and filling and curing grout; a third step for causing random cracks in the filled grout by sprouting the high pressure grout through an outlet of a grout hose that is inserted together with the anchor into the anchor hole, and for making the high pressure grout penetrate gaps of the cracks; and a fourth step for expanding the bulb by repeatedly performing the third step.
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