Construction Method of Centrifugally Concrete Filled Hollow Core Tube Column with Pre-reinforced Double Skin Panel Zone

摘要

The great pillars bear the load of the box welded to the 400 series Thick steel H-beam or pole-shaped cross-section But cost is carrying a lot of panel zone reinforcement is cumbersome. In addition, because a circular tube is machined plate or coil secondary expensive than hot-rolled products, H-beams, it is usually not suitable for large axial yeoseo less than 16mm thick pillars, and to reinforce the placement site for unfounded or reinforced concrete inside steel pipe It is hard. Therefore, by utilizing existing facilities to produce concrete hyumgwan easy dajimyeon by centrifugal force after injection of unfounded or reinforced concrete inside the steel pipe 800kgf / cm ² can produce more than high-strength concrete hollow CFT. The panel zone reinforcement concrete penetrate empty space between the double skin in the pledge process, so the weld zone on the outer diaphragm under the panel, and desirable to establish a panel zone with a double skin using centrifugal force to inject the concrete into the main steel pipe The core technology of the present invention to help fill in the closet. ; panel zone drilled to give the interior of the main concrete inlets to inject the concrete in the main steel pipe and steel pipe away from the center of rotation in the process of high speed The space between the double skin drilled through the concrete inlet centrifugal force is increased, so is the main steel tubes filled with concrete be fine. In short pre-backed panel charging zone centrifugal hollow concrete pillar with a double skin steel pipe manufacturing process as follows. ; Each welded steel pierced the concrete inlet and an air outlet maguri steel pipe ends, and each panel The main zone between the main steel pipe outside diameter diaphragm welded to the upper and lower outer diaphragm 200~300mm larger than the steel pipe, the drill eight holes of 50mm or so. Between the upper and lower portions of the outer end of the outer diaphragm forming a double skin in the 200~300mm large diameter welded steel pipe pieces of steel pipe after last week than the week fills the concrete inside the main pipe. When a hollow steel tube by rotating the main CFT is generated and curing of concrete. You can also use the outer diaphragm and octagonal steel pipe pieces, such as polygonal and circular tube of circular outer diaphragm instead of octagonal pieces, such as a polygon in the above description. ; Increase in the size of the axial cross-sectional shape, such as If it is necessary to increase the thickness of the steel pipe. However, it is cheap and easy to produce the steel pipes can not be more than 16mm thickness of the thicker the thickness is advantageous also because the specific gravity of the centrifugal force inside the reinforced concrete, rather than more dilute increasing the thickness of the steel pipe. Major reinforcement is omitted separate strip reinforced and select a method for welding steel pipe directly to the inside.