Device and construction process suitable for on-site rapid cold drawing and straightening of thick reinforcing steel bars

Abstract

The invention discloses a device suitable for on-site rapid cold drawing and straightening of thick reinforcing steel bars. The device suitable for on-site rapid cold drawing and straightening of thethick reinforcing steel bars comprises a straightening steel plate, wherein the upper part of the straightening steel plate is provided with a lifting hole used for being connected with a steel wire lifting rope; and one side of the straightening steel plate is provided with a straightening notch used for allowing a reinforcing steel bar to be straightened to be clamped in. A construction processfor on-site rapid cold drawing and straightening of the thick reinforcing steel bars comprises the following steps of forming the straightening notch in one side of the reinforcing steel bar straightening steel plate, and completing the machining of the reinforcing steel bar straightening steel plate; enabling an excavator to be in place on site, connecting one end of the steel wire lifting rope with an excavator grab bucket, and connecting the other end of the steel wire lifting rope with the straightening steel plate; manually placing a bent segment reinforcing steel bar to be straightened into the straightening notch of the straightening steel plate; sealing the reinforcing steel bars through movable steel wire buckles, so that the straightening steel plate is prevented from breaking away from the reinforcing steel bars and endangering operators during straightening; and straightening the reinforcing steel bars section by section through upward lifting of the excavator grab bucket.The reinforcing steel bar on-site straightening operation is conducted simply and conveniently, the working efficiency is greatly improved, and the construction period is shortened.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a device and construction technology suitable for on-site rapid cold drawing and straightening of thick steel bars. Background technique [0002] Whether it is a pile foundation or an underground diaphragm wall foundation, in order to ensure the pouring quality of the pile top concrete, the relevant specifications have clearly required that the pile head needs to be overfilled by more than 50cm. After the concrete reaches the design strength, the overfilled concrete will be removed. Ergonomics, the chiseling of overfilled concrete is generally done by mechanical chiseling, but there are a large number of relatively dense main reinforcements in the superfilled part. When this part of concrete is chiseled, the main reinforcements will be disturbed, resulting in chaotic bending of these main reinforcements. Before the construction of subsequent superstructures (such as...

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Problems solved by technology

[0005] For thermal straightening, not only the on-site operation is very inconvenient and the safety risk is greater, but also the metallographic structure of the steel bar will be changed under the action of high temperature, which will affect the mechanical properties and service life of the steel bar, so this kind of process is generally not allowed.

[0006] Manual straightening is mainly suitable for the straightening of sporadic steel bars with small diameter (general steel bar diameter not exceeding 10mm) and small engineering quantity. It is extremely difficult to straighten large diameter thick steel bars above φ28, and the manual straightening speed is slow and expensive. high, low efficiency

[0007] For conventional mechanical straightening, there are already professional mechanical straightening machines on the market, but this type of straightening machine is mainly used to straighten the raw steel bars before the production of finished products (such as steel cages, etc.) to ensure that the steel bars are unloaded. The accuracy of the length and the installation accuracy make it impossible to straighten the messy bent steel bars on the site

[0008] Based on the above reasons, the engineering community has not yet proposed a good solution for the rapid straightening of the steel bars at the pile head of the ground-connected wall with a large number and a large diameter due to the narrow and long distribution of the on-site steel bars, which inevitably disturb the main bars.

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