A safety anchor bolt with a ribbed stirring knife

Abstract

The invention provides a safe anchor bolt with a lattice rib stirring knife. The safe anchor bolt comprises an anchor bolt rod provided with an upper connection segment and a force bearing segment. The upper connection segment is used for being connected with a fastener. The force bearing segment is used for being inserted into a connection hole in a base body and combined with chemical resin mortar to form an anchoring column. The force bearing segment is provided with one or more telescopic segments. The safe anchor bolt is characterized in that the force bearing segment is provided with ribs capable of achieving a stirring function, and each telescopic segment is provided with multiple evenly-distributed ribs to form the lattice rib stirring knife, so that the functions that stirring of the whole force bearing segment is conducted by the lattice rib stirring knife and the chemical resin mortar in a hole cavity to eliminate hole wall residual dust and promote uniformity, thus the strength of the chemical resin mortar is improved, the life of the chemical resin mortar is prolonged, and reinforcement and anti-deformation are achieved on the telescopic segments of the anchor bolt rod are achieved. The safe anchor bolt has higher bearing strength and more perfect matching with the connection hole in the base body.

Description

technical field [0001] The invention relates to a safety anchor bolt with a ribbed mixing knife, which is used for anchoring and connecting various types of concrete, masonry, rock and other substrates through chemical resin mortar, especially for subways, high-speed rails, high-speed rails, etc. used in shock-resistant and high-humidity areas It can be used in projects such as power upgrades and upgrades, tunnels, docks, building envelopes, and basements. Background technique [0002] At present, the second-generation chemical resin mortar is used to anchor the column-vertical anchor bolt (referred to as the chemical column-cone anchor bolt) for the connection of concrete structures. The problem of mortar fracture layer occurs in the cementation. When the multi-channel column cone on the column cone anchor bolt is resistant to impact and bearing force, the thicker chemical resin mortar of the column cone can act as a buffer support without generating a mortar fracture layer...

AI Technical Summary

Problems solved by technology

However, due to the formation of the narrower part of the column vertebral body, the bearing capacity of the column-vertebrae load-bearing section is much smaller than that of the connecting thread section. In order to meet the strength requirements, at least 8.8-grade strength and an enlarged model are used to solve the problem, but it is found that the 8.8-grade In order to control the deformation, this kind of anchor bolt must be made of high-quality die steel and cut by CNC lathe (only 100 pieces / hour can be produced by a fully automatic CNC lathe with a vibrating plate, and cold Pier punching 7200 pieces / hour, work efficiency is reduced by 72 times), this is not only low work efficiency and high cost, but also there is a cutting allowance for the cone, increasing the size will double the amount of steel, and the waste of resources is serious, which is not in line with today's green Energy Saving and Emission Reduction Situation

[0003] According to the research on the engineering accidents that occurred, in addition to the quality problems of anchor bolts, there are also problems caused by the insufficient mixing of the second group of materials of chemical resin mortar, and the inability of the matrix hole wall to be completely bonded due to residual dust, and the flow of chemical resin mortar Insufficient chemical resin mortar in the hole caused by the outside of the hole

Moreover, the chemical resin mortar sags due to the center of gravity of the anchor rod before curing, resulting in uneven thickness in the hole, and some anchor rods have already leaned against the hole wall cavity, which affects the bearing capacity

[0004] In addition, the existing chemical resin mortar anchoring threaded anchor bolts and column-cone anchor bolts all have to weld the anchor bolts and connectors firmly and prevent loosening according to the regulations of the curtain wall code. The high temperature generated by the welding affects the qualitative change and life of the chemical resin mortar.

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