| 摘要 |
PURPOSE: A removal anchoring method is provided to remove an anchor body without a disturbance by little strength in a narrow space. CONSTITUTION: A removal anchoring method using a double anchor head to use for a layer difficult to place a perforated hole(1) comprises the steps of installing a packaged spacer(41) having a rugged section on a boundary between an anchorage tenon and a free tenon without using a wrinkle pipe, fixing a packer to the packaged spacer(41) using a band such as a steel wire, etc., installing a packer injecting hose to the packaged spacer(41) additionally, sealing up the perforated hole(1) by expanding the packer by grouting primarily to the whole area of an anchor body using a perforated hole injecting hose, grouting secondarily using a packer injecting hose, and grouting thirdly to the ground below the packer using the perforated hole injecting hose to form a bulb of an anchorage zone by pressure grouting.
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