A connection structure and construction method of a reinforced concrete column connected to a steel pipe concrete column

Abstract

The invention relates to a reinforced concrete column upper-connected concrete filled steel tube column connecting structure. The top of an original column is peeled and dabbed, the vertical main rib of the original reinforced concreted column is uniformly provided with horizontal connecting reinforcing bars in the circumferential direction of the column, the bottom of the dabbed area is provided with a connecting screw, a holed ring-shaped connecting end steel plate and a holed ring-shaped connecting bottom plate, the circumference of the upper edge of the dabbed area is uniformly provided with anchor cable fixing ends, and the holed ring-shaped connecting end steel plate and the holed ring-shaped connecting bottom plate are welded to the bottom and the top of separated steel tubes respectively; the center of the original reinforced concrete column is cored to form a hole and embedded with a reinforcing unit; the steel tubes and the hole are pressure-filled with concrete and then closed. The reinforced concrete column upper-connected concrete filled steel tube column connecting structure achieves certain reinforcement for the original column and meanwhile achieves the effects of increasing the height of the column, thereby achieving the aim of well connecting the original reinforced concrete column and an upper concrete filled steel tube column and obtaining collaborative stress bearing. The invention also discloses a construction method of the reinforced concrete column upper-connected concrete filled steel tube column connecting structure.

Description

technical field [0001] The invention relates to a connection structure and a construction method of a reinforced concrete column connected to a steel tube concrete column while the old reinforced concrete column can be heightened and the old reinforced concrete column can be reinforced. High-rise and reconstruction projects belong to the technical field of housing construction engineering. Background technique [0002] With the rapid development of the national economy, many buildings are restricted by the economic conditions and construction technology at that time, and they can no longer meet the requirements of the times in terms of the perfection of building functions and the form and decoration of building structures. Many houses are 2 to 4 stories, but their load-bearing structures have certain potential. If all these houses are demolished and built, the state's financial resources will be unbearable. It can achieve the goal of economical, practical and fast housing c...

AI Technical Summary

Problems solved by technology

Most of the grouting materials are epoxy cement cementing materials. This method is simple and easy to implement, but there is still no data on its anchoring strength, and the anti-aging performance of epoxy cementing materials is poor.

In addition, when welding the steel bars near the anchorage area, the high temperature also has a great influence on the anchorage effect

[0005] Practice has proved that the above measures have achieved good construction results under suitable engineering conditions, and the integrity is of positive significance, but there are still some deficiencies. The above methods require a large construction operation space, and cannot be carried out for projects with small operation space. implementation, there is no specific solution to the problem of connection and coordinated stress between the old and new structures, and the construction process and structure of the above measures are particularly complicated, the construction period is long, and the cost is huge

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