Method for protecting pre-buried bolt exposed nut and screw against concrete pollution

Abstract

The invention discloses a method for protecting a pre-buried bolt exposed nut and a screw against concrete pollution. The method comprises the following steps that S1, a pre-buried bolt 5 penetrates through a wrapping film 1 from a round hole 6, and the wrapping film 1 is laid on a pre-buried steel plate 4; S2, a washer 2 and a dismounting nut 3 are sequentially installed, and the dismounting nut3 is preliminarily tightened; S3, the ambient wrapping film 1 is folded upwards, and the end of the wrapping film 1 is tightened on the top (thread head) of the pre-buried bolt 5 by using a binding belt 7; and S4, concrete is poured, and after the concrete has certain strength and the pre-buried bolt 5 is fixed, the wrapping film 1, the dismounting nut 3 and the washer 2 are removed. The method has the advantages that residual pollution generated by an adhesive tape wrapping method is avoided, the later residue cleaning process is omitted, labor is saved, the cost is reduced, and the engineering quality is guaranteed.

Description

technical field [0001] The invention relates to the technical field of project construction, in particular to a method for protecting exposed nuts and screws of pre-embedded bolts from concrete pollution. Background technique [0002] In engineering projects such as highway bridges, municipalities, ports and wharves, it is often encountered that bolts or bolt components are pre-embedded in concrete, and then the concrete is poured. Concrete residue, for subsequent work on bolt installation. [0003] The installation of bridge guardrails and various signs and signs requires accurate pre-embedding and installation of bolts and bolt components in advance. Screws, washers, etc.) pollute the concrete residue, and usually use methods such as wrapping tape on the exposed parts and applying butter to isolate the exposed parts. This isolation has the following defects: [0004] Disadvantages of tape wrapping method: [0005] (1) Concrete grout leaks from the tape gap; [0006] (2...

AI Technical Summary

Problems solved by technology

[0007] (3) The bottom surface of the gasket cannot be wrapped with tape, and the concrete grout can still leak

[0009] (1) The butter flows down naturally, and it is easy to enter the concrete, affecting the quality of the concrete;

[0010] (2) During concrete construction, it is easy to mix with concrete and enter the concrete, which will affect the quality of concrete

[0011] It is a very meticulous, time-consuming and repeated work to clean up the contaminated pre-embedded bolt components to meet the qualified standards. Only by manual cleaning one by one, a pre-embedded screw head, nut, It takes a long time to clean the gasket and other components, and the work efficiency is extremely low. In the cleaning process, hammers, chisels, knives, etc. are also used, which destroys the galvanized anti-rust protection system of the embedded bolt components and brings adverse effects on the project.

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