Bonding-free prestressed concrete filled steel tube colossal column with built-in plastic drain pipe
A technology of concrete filled steel tubes and prestressed steel strands, applied in the directions of columns, piers, pillars, etc., can solve problems such as buckling, and achieve the effects of improving local buckling resistance, increasing compactness, and improving performance
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Embodiment 1
[0057] An unbonded prestressed steel pipe concrete giant column with a built-in plastic drainage pipe according to the present invention consists of a giant steel pipe column 1, concrete in the pipe 2, plastic temporary drainage pipe 3, unbonded prestressed steel strand 4, and an inner ring in the pipe. In the giant steel pipe column 1, several ring-shaped diaphragms 5 in the pipe are arranged. The holes, the unbonded prestressed steel strands 4 are evenly arranged along the periphery of the giant steel pipe column 1, the lower ends of the unbonded prestressed steel strands 4 are anchored to the bottom of the giant steel pipe column 1, and the unbonded prestressed steel strands 4 pass through The small exhaust hole of the annular diaphragm 5 in the pipe is led upwards, the upper end of the unbonded prestressed steel strand 4 is anchored on the tensioned anchor steel plate 6 in the pipe, and the concrete 2 in the pipe is filled in the cavity of the giant steel pipe column 1 Ins...
Embodiment 2
[0061] A construction method for preparing an unbonded prestressed steel pipe concrete giant column with a built-in plastic drainage pipe, comprising the following steps:
[0062] Step 1: At the construction site, the construction and installation of the giant steel pipe column 1 is carried out, and the annular diaphragm 5 inside the pipe with small exhaust holes evenly arranged along the periphery is set in the giant steel pipe column 1 at the elevation of the steel beam top surface of the floor ;
[0063] Step 2: The unbonded prestressed steel strand 4 is evenly arranged along the periphery of the giant steel pipe column 1, the lower end of the unbonded prestressed steel strand 4 is anchored to the bottom of the giant steel pipe column 1, and the unbonded prestressed steel strand 4 Through the small exhaust hole of the annular diaphragm 5 in the pipe, it is drawn upward;
[0064] Step 3: In the giant steel pipe column 1, the concrete 2 in the pipe is poured by using the con...
Embodiment 3
[0071] A 400-storey super high-rise building adopts a steel tube concrete column-reinforced concrete shear wall core tube structure, in which the bottom diameter of the steel tube concrete column is 2.5 meters, the wall thickness of the steel tube is 30 mm, the concrete in the tube is C60, and the original design requirement is jacking concrete The grouting scheme, after negotiation, was changed to the construction scheme of unbonded prestressed concrete-filled steel tube giant columns with built-in plastic drainage pipes.
[0072] At the level of the floor, two ring-shaped diaphragms in the pipe are installed in the giant steel pipe column. The width of the ring-shaped diaphragm in the pipe is 400mm, and the thickness of the ring-shaped diaphragm in the pipe is 20mm. hole.
[0073] Set 12 φ15.2 unbonded high-strength steel strands inside, the ultimate strength of the steel strands is 1860MPa, the high-strength steel strands are anchored at the bottom of the giant steel pipe c...
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Abstract
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