| 摘要 |
<p>Method of anchoring a reinforcing element such as an anchor bolt into a rock substrate comprises (1) drilling a borehole in the rock and inserting a frangible cartridge comprising a solid hot melt adhesive, (2) inserting a rotating reinforcing element into the hole and into contact with the hot melt adhesive so that the rotation causes the adhesive to melt and to form a layer of molten grouting adhesive in the annular space between the reinforcing element and the wall of the borehole; and (3) allowing the adhesive to solidify to anchor the bolt etc. in place. The cartridge is e.g. in the form of a hollow tubular casing contg. the hot melt adhesive in particulate form. The adhesive may be e.g. of EVA, polyamides, polyesters of polyolefins. Process is esp. useful for fixing anchor bolts etc. into rock. Use of solid hot melt adhesives in place of known liq. compsns. facilitates the process and overcomes problems of solvent toxicity and flammability associated with liq. prods. Loss of adhesive by draining into cracks in the rock whilst in the liq. state are reduced and the adhesive sets rapidly when rotation is ceased.</p> |
