Fast hoisting-aligning method for Large-sized steel frames, and steel frame base structure

Abstract

The invention discloses a fast hoisting-aligning method for Large-sized steel frames, and a steel frame base structure. The method comprises: precisely positioning a light steel bottom plate; drawing center lines on the steel bottom plate and a steel column ready to be connected; aligning a center line on the steel bottom plate with the center line on the steel column during alignment; and welding and fixing the steel column and the steel bottom plate. The method has the advantages of convenient fast alignment and capability of greatly accelerating project progress, reducing construction cost, preventing anchor bolts from being destroyed during construction and improving project reliability.

Description

technical field [0001] The invention relates to a method for quickly hoisting and aligning a large steel frame and a base structure of the steel frame, and belongs to the technical field of hoisting of large objects in building installation. Background technique [0002] When installing a large and heavy steel frame for a 400t / H diesel hydrogenation furnace in a petrochemical plant, it is necessary to accurately align and position the steel frame of the boiler with the steel bottom plate. Since the steel frame of the boiler is 25.244M high and 13.388M wide, it is hoisted in a single-piece combination The calculated weight is 47.730T, so the hoisting and alignment process is very troublesome. The steel frame of the boiler is supported by 12 steel columns on 12 foundations on the ground, and each foundation is embedded with 6 M40×1200mm anchor bolts, and the bottom of the steel columns is welded with a steel bottom plate of δ=46mm. There are holes corresponding to the anchor ...

AI Technical Summary

Problems solved by technology

[0005] 1. Since the steel frame of the boiler is high, wide and very heavy, it is difficult to align the anchor bolts with the holes on the steel floor during hoisting. The whole alignment process requires the assistance of lifting equipment, which adds a large The occupancy time of lifting equipment and the cost of each shift are high;

[0006] 2. During the hoisting process, it is easy to bend the anchor bolts or damage the threaded fasteners on the anchor bolts

[0007] 3. The alignment of the steel column after it is in place (such as: the horizontal elevation of the steel column, the vertical and horizontal positions, and the inclination) is very difficult, time-consuming and labor-intensive, and also requires lifting equipment to assist in the construction

[0008] In summary, the above-mentioned existing technologies not only have backward technology, high construction costs, affect the progress of the project, but also easily damage the anchor bolts, occupy a large crane for a long time, and have poor reliability.

Images