| 摘要 |
PURPOSE:To enhance corrosion resistance and bearing force of anchors by a method in which sheath for strands is formed into at least double structure in the fixing part of anchor and grout is injected into the space between the double sheaths. CONSTITUTION:A number of PC steel strands 1 are bundled and covered with an inner sheath 2 and an outer sheath 3, and the opening of the tips of the sheaths 2 and 3 is closed to assemble an anchor. The anchor so assembled is inserted into an anchor pit 6, and a water-stop grout 8, e.g., cement mortar, etc., is injected into the space between the sheaths 2 and 3. A fixing grout 5 is injected into the space between the anchor pit 6 and the sheath 3, and an anticorrosive grout 7 is injected into the sheath 2, whereby enhancing the integrity of the grouts in contact with the inside and outside of the sheaths and the sheaths.
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