Gluing and die bottom expanding anchor bolt and use method thereof

Abstract

The invention discloses a gluing and die bottom expanding anchor bolt and a use method thereof and relates to the technical field of building anchor bolts. The gluing and die bottom expanding anchor bolt comprises a screw. The two end screw faces of the screw are each provided with an outer thread. An outer hexagonal installing head is arranged at the end of one outer thread end of the screw. Thescrew is sequentially provided with a hexagonal nut, a gasket, a locating part, a stop ring, a die bottom expanding lock key and a combination cone nut in the length direction. A cone plug is insertedin the end of the combination cone nut. The gluing and die bottom expanding anchor bolt is provided with the outer hexagonal installing head, the locating part, the die bottom expanding lock key, thecombination cone nut and the cone plug, the cone plug is tightly attached to the hole bottom wall by knocking on the outer hexagonal installing head, the combination cone nut stretches along the coneplug, the die bottom expanding lock key stretches along the combination cone nut under pushing of the stop ring by rotating the outer hexagonal installing head, and the requirements of die bottom expanding, gluing and centering are achieved.

Description

technical field [0001] The invention belongs to the technical field of building anchor bolts, and in particular relates to an adhesive molded bottom expansion anchor bolt and a use method thereof. Background technique [0002] For anchor bolts used in concrete structures, Europe and the United States have very successful experience, and the corresponding design and application specifications for concrete anchor bolts in my country are also becoming more and more perfect. However, the existing anchor bolt fixing methods are relatively simple, or they are mechanically fixed, such as expansion anchors. Bolts, bottom expansion anchors, bottom cut anchors, or chemical anchors, the single fixing method determines the low reliability of the anchoring system. Chemical fixing and mechanical fixing have their own advantages and disadvantages. If the advantages and disadvantages of both can be combined Combined, you can achieve a more secure fixed purpose. [0003] Therefore, the Europe...

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Problems solved by technology

[0004] 1. The screw part of the anchor bolt and the fixed end of the tapered nut at the bottom of the anchor bolt rotate synchronously during installation, resulting in the inability to fully open the mold expansion bottom lock key, and it is difficult to realize the mold expansion bottom fixing function;

[0005] 2. If the tapered nut at the bottom end of the screw rod and the anchor bolt does not follow the rotation, the outer diameter of the bottom lock key of the mold expansion or the outer diameter of the fixed end of the bottom cone nut should be enlarged so that they are close to the concrete hole wall. However, doing so , which makes the "piston effect" appear, the chemical anchoring agent injected into the hole in advance is completely squeezed out by the anchor bolt when the anchor bolt is installed, and the real "glue" function cannot be realized, or although it is not completely squeezed out, the chemical anchoring agent The damping effect of the mold is too strong, the mold expansion bottom lock key is difficult to be in place correctly, and the "mould expansion bottom" function cannot be realized, that is, the two functions of mold expansion bottom and gluing are stretched, and one loses the other.

[0006] 3. When installing the adhesive mold expansion bottom anchor bolt, even if the above-mentioned "following rotation" or "piston effect problem" is solved, it is not easy to solve the corresponding problem between the longitudinal central axis of the anchor bolt and the longitudinal central axis of the pre-drilled hole in the concrete. The problem (hereinafter referred to as "centering") leads to the unsatisfactory position of the mold expansion bottom lock key, which in turn affects the fixing effect of this type of anchor bolt

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