Quick presressed anchor rod structure and construction method

Abstract

The invention relates to a quick presressed anchor rod structure and a construction method. The structure comprises a washer (1), an anchor rod (2), a nut (3), a fixed wall body (4), an expansion groove (5), a rotating steel wire (6) and an anchor head barb (7). The working principle of the structure is as follows: an embedding space is provided to the anchor rod (2) by the expansion groove (5); the rotating steel wire (6) is arranged at the periphery of the anchor rod (2); a higher resistance is generated in the suffering of axial force; and the anchor head barb (7) is arranged at the lower end of the expansion groove (5) of the anchor rod (2) for realizing a highest resistance at the terminal. The construction method comprises the following steps: an electric drill is used for drilling to realize the excavation of the expansion groove (5); the anchor rod (2) is mounted in the expansion groove (5) according to the position; then, the cement grouting is performed for the anchor rod (2); and through the cement grouting, the anchor rod (2) with the rotating steel wire (6) is more completely bonded with the wall body or clay. The washer (1) is arranged at the exposed end of the anchor rod (2); the nut (3) is screwed up to realize the fixation of the anchor rod; and the load can be applied to the anchor rod after the construction for 2 hours.

Description

technical field [0001] The invention relates to an anchor rod and a construction method, in particular to a fast prestressed anchor rod structure and a construction method. Background technique [0002] Prestressed anchorage is a measure to increase the stability of retaining structure or rock and soil mass by anchorage method. The method is to drill a hole through the sliding surface that may slide or has slipped, fix one end of the steel bar (or cable) in the stable rock and soil at the bottom of the hole, and then tighten the steel bar (or cable) So as to produce a certain resilience (that is, prestress), and then fix the other end of the steel bar (cable) on the surface of the rock-soil mass or support structure, and use the resilience of the steel bar to compress the rock-soil mass or support structure that may slide , in order to increase the shear strength on the sliding surface, so as to achieve the purpose of improving the stability of rock and soil mass or retaini...

AI Technical Summary

Problems solved by technology

[0003] In the process of prestressed anchor bolt construction, since the bonding force between the steel bar and the grouting body can only be stretched when it reaches a certain value, it usually takes more than 7 days in the general process, and the waiting time is long. For this reason, we Using reasonable technology and construction technology, a prestressed anchor structure and construction technology are proposed, which can greatly reduce the construction time, so that the construction speed of the prestressed anchor can be maximized

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