Enlarged end type soil anchor bolt

Abstract

The invention discloses an enlarged end type soil anchor bolt, and belongs to the field of geotechnical engineering. The enlarged end type soil anchor bolt comprises a pull rod and at least one enlarged end type carrier arranged at one end of the pull rod, and the enlarged end type carriers are independent components capable of being assembled along with the pull rod. Each enlarged end type carrier comprises a first bearing plate, a second bearing plate and sealing cloth, wherein a plurality of reinforcement ribs playing a role as a framework are fixedly arranged between the first bearing plate and the second bearing plate, the sealing cloth is fixed between the first bearing plate and the second bearing plate to form a bag type structure, and a high-pressure grouting pipe is inserted into the bag type structure. The bearing function of the anchor bolt is effectively played through an end enlarged head, and meanwhile the framework effect is played through the reinforcement ribs and the bearing plates, so that when the anchor bolt is subjected to ultimate tension, mortar in the enlarged end type carriers is not pulled or pressed broken, effective exertion of anchor bolt end resistance at the enlarged head is ensured, and the bearing force of the anchor bolt is improved by 37-120%.

Description

technical field [0001] The invention relates to a building anchor, and more specifically relates to an end-expanding soil layer anchor, which is mainly used in geotechnical engineering fields such as building deep foundation pit support and soil slope reinforcement. Background technique [0002] The main application fields of soil anchors are: building deep foundation pit support, soil slope reinforcement engineering, subway station support and stability control engineering, landslide remediation or geological disaster prevention engineering, etc. For the soil anchor engineering in various application fields, in order to strictly control the deformation of the slope soil and ensure the safety of the support structure, the anchor is generally required to have a higher ultimate pull-out resistance. For soil anchors, it is not advisable to achieve a higher ultimate pullout resistance only by increasing the length and diameter of the anchor; Based on the realization of the head...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiency of poor pull-out resistance of existing soil anchors, and to provide an end-expanded soil anchor. By adopting the technical solution of the present invention, the end-expanded load-bearing can be assembled on the pull rod at the construction site. Body, simple structure, easy to use, and through the high-pressure grouting of the expanded-end bearing body to squeeze the surrounding soil to form the end-enlarged head, use the end-enlarged head to effectively play the bearing role of the anchor rod, and use the reinforcing rib It has played a "skeleton effect" with the bearing plate. When the anchor rod is subjected to the ultimate tensile force, the mortar in the expanded-end bearing body will not be cracked or fractured, ensuring that the resistance of the anchor rod end at the enlarged head is effectively exerted. The bearing capacity of the bolt can be increased by 37% to 120%.

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