A production method of anti-skid and anti-corrosion pre-buried channel

Abstract

The invention relates to a production method of an anti-skid and anti-corrosion pre-buried channel, comprising: 1. Processing of anti-slip tooth grooves; 2. Processing of anchor legs; 3. Assembly of straight channels; 4. Anti-corrosion treatment of straight channels; , Arc channel production. The pre-embedded channel produced by the invention has good axial anti-slip force, corrosion resistance and high tooth precision.

Description

technical field [0001] The invention relates to the technical field of civil engineering embedded parts, in particular to a production method of an anti-slip and corrosion-resistant embedded channel. Background technique [0002] The anti-skid cog is a channel steel with an anti-skid structure. Its most basic structure is that there is an inward hook at the leg end of the channel steel. The inner surface of the hook is provided with a dovetail surface, a triangular tooth or a boss; T-bolt It is a T-shaped fastening bolt. When it is used in conjunction with the anti-slip tooth groove, there is a matching dovetail surface, triangular teeth or grooves on the inner surface of the T-shaped head; the relationship between the anti-slip tooth groove and the T-shaped bolt The parts are meshed to form a connection pair, which can bear a large vertical pulling force and a certain axial anti-slip force. [0003] The pre-embedded channel is a combination formed by anti-slip tooth groove...

AI Technical Summary

Problems solved by technology

However, a large number of tests have proved that the salt spray test data of the multi-component alloy co-infiltration channel of the existing Q355B carbon steel generally cannot reach the above indicators. The salt spray test time is 186 hours, which is far from the 2400 hours and 300 hours required by the subway tunnel, and cannot meet the requirements of mass production channels

[0009] (2) Missing plating on the surface, missing coating, external force damage to the coating or acid corrosion in the anchor hole gap is inevitable. After this situation occurs, it is usually on-site paint repair. After a period of time, a corrosion source will be formed here And spread, there is a large corrosion risk

[0010] (3) The pre-embedded channel made of ordinary stainless steel will also appear red rust, which is caused by the residual heat-affected zone at the welding or riveting of the tooth groove and the anchor leg, and the cracking and destroying the passivation layer at the anchor head

[0012] (1) Stability problem: the external channel is fixed by the lug or the embedded sleeve. Since the channel is placed outside the segment, compared with the stable state embedded in concrete, it is in an unstable state and vibrates. is unavoidable, especially in tunnel bends, there are safety issues

[0013] (2) Fire-resistant performance problem: Since the external channel is exposed to fire on all sides during a fire, it is in a very unfavorable state, and it is necessary to use fire-resistant coatings for fire-resistant treatment, otherwise it will not meet the fire-resistant requirements

[0014] (3) The problem of cost increase: when the external channel is fixed, it is necessary to increase the hanging lug or the embedded sleeve, the channel section needs to be increased, the fastening bolt and other accessories need to be added, and the fireproof coating needs to be added. The total increase is at least 80 per meter. $ to $160 cost

[0016] (1) The shape, size and position of the teeth in the channel are unreasonably designed, causing the axial anti-slip force of all embedded channels to be lower than the vertical tensile force. The larger the specification, the more obvious the axial anti-slip force value of the channel with the largest specification Just 20% of the vertical stretch force

[0017] (2) The channels of different specifications use the same size of teeth, resulting in the multiplication of the vertical tensile force of the large-size channel, while the axial anti-slip force hardly increases, and the unbalanced performance causes waste of metal materials. increased cost

[0018] (3) The stainless steel channel and carbon steel use the same size and shape of teeth. Due to the low yield strength and small axial anti-slip force of ordinary stainless steel, it cannot meet the design and use requirements.

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