Construction method of steel pipe concrete column

Abstract

The invention relates to the building field. The invention relates to a construction method for a concrete filled steel tubular column, comprising the following steps that: a tube is filled with water at first, and then a tremie is put down to the bottom of a pile; concrete is poured into the steel tube by a hopper through the tremie, and a vibrating tamper which is attached to the outerwall of the tube performs concrete vibrating when placing is performed simultaneously; primary concrete placing is performed until the height is 3 to 5 meters on the upper side of a nozzle of the tremie, and the tremie is lifted and guaranteed that the embedding depth of the tremie in concrete is not less than 2 meters; secondary concrete placing is performed, and the vibrating tamper which is attached to the outside of the tube on the bottom layer is started; lifting and placing are repeated, and the concrete is placed to the top of the column; and laitance is removed. The construction method solves the problem of the separation phenomenon caused by overhigh concrete placing height, increases the compactness of the concrete, reduces the number of air bubbles, has small shrinkage clearance between the concrete and the steel tube, can well give play to the function of stress, is convenient in construction, is mechanized, and is simple and convenient in operation. Moreover, the quality can be guaranteed; the equipment is saved by 30 percent; the stability is strong; and 50 percent of raw steel materials and 35 percent of the concrete are saved when the steel tube and the concrete are under same stress, thereby the production cost is effectively reduced.

Description

1. Technical field: [0001] The invention relates to the construction field, in particular to a production method of a steel pipe concrete column. 2. Background technology: [0002] Concrete filled steel tube (abbreviated as STCC in English) is a composite structural material formed by filling concrete into thin-walled circular steel tubes. At present, there are three main methods of pouring concrete filled steel tubes: 1. pumping jacking pouring method; 2. vertical high-level throwing without vibration method; 3. vertical manual pouring method. [0003] Jacking method: Use the pumping pressure to inject concrete from bottom to top into the steel pipe, and the concrete will reach a dense state by the concrete's own weight and pumping pressure. The main problems are: for concrete filled steel tubes with large diameter and high pouring height, the one-time pouring height is very large, and the concrete’s own weight is also large, which requires a high pressure on the delivery ...

AI Technical Summary

Problems solved by technology

The main problems are: for concrete filled steel tubes with large diameter and high pouring height, the one-time pouring height is very large, and the concrete’s own weight is also large, which requires a high pressure on the delivery pump; and once the pouring is interrupted in an emergency, it will Can't continue and pour

The main problem is: during the falling process, the concrete segregates, which affects the quality of the concrete

The main problems are: the outer diameter of the steel pipe in this project is 400mm, the height is 35m, which cannot be realized by manual vibration, and the vibration of the mechanism is not easy to control

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