Unloading and dismantling construction method for heavy-duty floor type steel pipe support

Abstract

The invention discloses an unloading and dismantling construction method for a heavy-duty floor type steel pipe support. The method sequentially includes the following steps that first, vertical slits which are 10+ / -5 cm long and 1+ / -0.3 cm wide are cut in the inner sides of the bottom ends of stiffening plates in the radial direction; second, horizontal circular slits are circumferentially cut in steel pipe columns in the positions of the vertical slits, the top ends of the horizontal circular slits are lower than the upper ends of the vertical slits, the bottom ends of the horizontal circular slits are higher than the bottom ends of the vertical slits, and the width of each horizontal circular slit is larger than the support elastic compression value of the steel pipe column in the position of each circular slit; third, the steel pipe columns on the upper part and the lower part of the position of each horizontal circular slit are welded together; fourth, a bottom mold is drawn out, and distribution beams and the steel pipe columns are dismantled. According to the method, the stiffening plates (the vertical slits ) are used for guiding, and the falling amount is controlled by controlling the width of the horizontal circular slits when the slits are cut in the circular direction, thus, the support can fall down safely and fast, sand boxes, wedge blocks and other structures are not needed, and the method is easy and convenient to operate, high in unloading and dismantling efficiency, low in cost and extremely high in economic value and promotional application value.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a construction method for unloading and dismantling a heavy-duty floor-standing steel pipe support. Background technique [0002] With the development of construction machinery and equipment, more and more heavy loads appear on the construction support of building structures. For example, the lower beam of a long-span bridge and a high tower has a large amount of pouring in a single pour and a large load, and floor-type steel pipe column supports are mostly used. The steel pipe column support includes a steel pipe column, and a number of stiffening plates (generally 4-6) are evenly arranged on the head portion of the steel pipe column along the circumferential direction, and each stiffening plate is arranged along the radial direction of the steel pipe column. The top of the steel pipe column and the stiffening plate is connected to the distribution beam, and the d...

AI Technical Summary

Problems solved by technology

The removal of steel pipe column tops by means of sand boxes and steel wedges has disadvantages such as cumbersome construction and high safety risks, especially when the load is particularly large, it is more difficult to realize

Images