Manufacturing method of long-span prefabricated roof panels
A manufacturing method and technology for roof panels, applied in manufacturing tools, ceramic molding machines, etc., can solve the problems of weakening the structural performance and durability of roof panels, affecting the bearing capacity of steel strands or steel bars, reducing the use function, etc., so as to achieve durability. Good, short construction period, the effect of improving the mechanical performance
Active Publication Date: 2016-03-16
邳州东博信息技术有限公司
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AI Technical Summary
Problems solved by technology
Especially in the case of large spans, the shear force at the end of the roof panel will be greater. If no corresponding technical measures are taken, the steel strands or steel bars will be easily corroded after cracks in the roof panel, which will affect the bearing capacity, and the structural performance and durability of the roof panel. Sexuality will be greatly weakened thereby reducing the function of use
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0027] The manufacturing steps of this embodiment include:
[0028] (1) Renovation of the bottom formwork.
[0029] (2) Install the turning device and guide device.
[0030] The guide device adopts high-strength plastic bushings, and the high-strength plastic bushes are provided with rubber washers every 1m, and the thickness of the rubber washers is 10-15mm.
[0031] (3) Install steel lines.
[0032] The prestressed steel strand is divided into two parts: straight bars and broken line bars, and the straight bars and broken line bars are arranged at intervals.
[0033] (4) Stretch the steel grain line.
[0034] Straight bars are tensioned at one end. The construction process is as follows: 1. The overall initial adjustment, one end is a jack, the other end is a wedge-shaped tensioning block, and the two ends are integrally stretched to the ultimate tensile strength of 0.2 steel grain lines. 2. Stretch the single beam to 0.5 tension control stress, and hold the load for 3 ...
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Abstract
The invention discloses a large-span prefabricated roof panel manufacturing method. The large-span prefabricated roof panel manufacturing method is characterized by comprising the following steps that a soffit formwork is repaired; a turning machine and a guide device are installed, and the guide device is a high-strength plastic bush; a steel strand is installed, the prestressed steel strand comprises a straight strand rib and a folded strand rib, and the straight strand rib and the folded strand rib are arranged at an interval; the steel strand is tensioned, the single end of the straight strand rib is tensioned, and the double ends of the folded strand rib are tensioned; roof panel concrete is poured in a mode of horizontal layering and inclined propelling, and the inclination degree is no more than 1:3; steam curing is conducted; a model is detached; the steel strand is released. When the intensity of the roof panel concrete reaches 85% of a designed value, the age of the concrete is no less than 3d, and the model is detached, the prestressed steel strand can be released. The tension release stress of the steel strand is 1200MPa. The large-span prefabricated roof panel manufacturing method has the advantages of being short in construction period, concise in process, saving in materials, good in durability and the like.
Description
technical field [0001] The invention relates to a prefabricated roof panel, in particular to a method for making a large-span prefabricated roof panel. Background technique [0002] Roof panel ends are prone to cracks, and there are many factors for cracks, mainly caused by insufficient shear resistance of roof panel ends under stress. Especially in the case of large spans, the shear force at the end of the roof panel will be greater. If no corresponding technical measures are taken, the steel strands or steel bars will be easily corroded after cracks in the roof panel, which will affect the bearing capacity, and the structural performance and durability of the roof panel. Sexuality will be greatly weakened thereby reducing the function of use. The present invention arranges part of the steel strands of the roof panel as broken lines, and the prestressed steel strands are adapted to the actual stress of the roof panel by bending the prestressed steel strands upward at the p...
Claims
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IPC IPC(8): B28B23/04
Inventor 叶长青
Owner 邳州东博信息技术有限公司