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Construction method of steel pipe concrete column

A technology for concrete-filled steel tubular columns and construction methods, which is applied to columns, piers, pillars, etc., can solve the problems of high pressure requirements of conveying pumps, large one-time pouring height, affecting concrete quality, etc., and achieves small shrinkage gap and quality assurance. , the effect of easy material processing

Inactive Publication Date: 2008-12-10
DALIAN SANCHUAN CONSTR GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Construction method of steel pipe concrete column

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Effect test

Embodiment 1

[0016] Press as figure 1 The technological process shown is for the construction of concrete-filled steel pipe columns. The 35-meter-high limb concrete-filled steel pipe concrete is poured diagonally. After the steel pipe piles are installed and the strength of the foundation concrete reaches 75%, the steel pipes are filled with water using a water pump. . use The 2-meter section of the steel pipe is connected with a screw, and the middle is a slipknot. Make a conduit. Insert the prepared conduit into the steel pipe at a distance of 600mm from the bottom of the steel pipe. The pressure reduces the falling speed of the concrete, pouring to 3 meters above the conduit at one time, lifting the conduit, and ensuring that the conduit is embedded in the concrete not less than 2 meters, and then pouring concrete for the second time. Start the vibrator outside the bottom pipe, the working range is effective when the transverse amplitude of the steel pipe is not less than 0.3mm, and ...

Embodiment 2

[0019] After the steel pipe piles are installed, a water pump is used to fill the steel pipes with water. The conduit connected to the bottom of the hopper is inserted into the steel pipe, 600mm away from the bottom of the steel pipe. After the concrete strength of the filling cup mouth reaches 75%, the hopper is used for concrete pouring. The conduit should be lifted slowly according to the falling speed of the concrete, and the lift of the conduit should be controlled by the amount of concrete. Speed, concrete vibration: After the first pouring, the concrete is embedded in the conduit for 2 meters, and the attached vibrator is started. The vibration time should be controlled within 1 minute to prevent segregation of the concrete caused by excessive vibration. The main function of vibration is to compact concrete and reduce air bubbles in concrete. Repeatedly in sequence, without stopping during the pouring process, the concrete is poured to the top of the column, the laitanc...

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PUM

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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 ...

Claims

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Application Information

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IPC IPC(8): E04C3/34B28B23/18
Inventor 孙辉栾风辉杨义臣
Owner DALIAN SANCHUAN CONSTR GROUP
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