Embedded steel pipe pull-out device and method during post-tensioning method prestressed concrete construction
A concrete and prestressed technology, which is applied in the processing of building materials, construction, building construction, etc., can solve the problems of easy collapse holes and labor-intensive problems
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[0006] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.
[0007] see figure 1 Firstly, according to the conventional method of post-tensioning prestressed concrete construction, prestressed core-pulling steel pipes are buried in the formwork, and the concrete is poured. Negative lead wires (4) are respectively connected to both ends of the steel pipe (1), and then the power supply of the electric heating device (2) is connected, and the steel pipe (1) is rapidly heated with low voltage and high current, and the steel pipe (1) is heated to a certain degree Cut off the power supply, remove the positive and negative wires, quickly pass cold water through the steel pipe (1) to cool the steel pipe (1), the cooled steel pipe (1) will be separated from the concrete hole, just pull out the steel pipe.
[0008] Note: Before the steel pipe (1) is pre-embedded in the formwork, it is still necessary ...
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