| 摘要 |
The present invention relates to a permanent anchor which is used for preventing collapse of an excavation wall during various engineering works or preventing collapse of a cut-slope at a cutting area of a rock or the ground, and more specifically, to a permanent anchor which comprises a steel wire fixing part to fix and combine a tension wire and a fixing head part extended and spread by a grout injection pressure. The fixing head part is combined to a lower part of the steel wire fixing part. The fixing head part comprises a fluid operated by the grout injection pressure and a plurality of anchor wings which is extended and spread by the pressure of the fluid. In case the depth of an anchor hole lacks in a process of embedding the fixing anchor into the bored anchor hole, the fixing anchor can be withdrawn promptly without interference between an inner plane of the anchor hole and the fixing anchor, and thus the fixing anchor can be embedded again after performing a re-boring work and work correction can be achieved simply. The fixing anchor in the embedded state is stuck and fixed to an inner wall of the anchor hole solidly as the anchor wing is extended and spread by a discharge pressure of a grout, and thus fixing force of the fixing anchor and anchorage force by the grout increase to be able to perform reinforcement of a periphery part by the permanent anchor efficiently. Because voids or joints as to the grout of a front end of the anchor hole do not occur, high quality construction can be done. |
