CN2145821Y

CN2145821Y - Wave-shape wire prestressed concrete porous slab

Info

Publication number: CN2145821Y
Application number: CN 92245804
Authority: CN
Inventors: 景全德
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-12-29
Filing date: 1992-12-29
Publication date: 1993-11-10
Anticipated expiration: 2002-12-29

Abstract

The utility model relates to a wave-shaped wire prestressed concrete porous slab mainly used for the floorslabs and the roofs of industrial and civil buildings. The wave-shaped wire prestressed concrete porous slab is characterized in that wave-shaped wires are taken as the main steel bars of a prestressed concrete porous slab, and then the wave-shaped wire prestressed concrete porous slab is produced by conventional molding process. The mechanical strength of the prestressed concrete porous slab is enhanced. The cracking resistance of the wave-shaped wire prestressed concrete porous slab reaches to 146% of standard cracking resistance via actual measurement, and bending strength reaches to 342% of standard bending strength. Breaking load values satisfy and exceed standard design requirements, and simultaneously the steel consumption of the utility model is saved between 25 % and 38 % as compared with standard steel consumption.

Description

Wave-shape wire prestressed concrete porous slab

The utility model relates to the flooring and the roofing pretensioning prestressed concrete porous plate of a kind of industry, civilian construction.

It all is cold group of mild steel wire φ of configuration that prior art is made the pretensioning prestressed concrete porous plate ^b ₄, φ ^b ₅Or carbon steel wire φ ^s ₄, φ ^s ₅Light circle raw silk rings be main muscle.Because light circle raw silk rings is the porous plate that main muscle obtains, in itself and the concrete bonding process, often all elder generation is made it to lose supporting capacity by the steel wire slippage and causes that tensile strength reduces, the rupture load ability does not reach the design, destroy value, only reach 90% of design, destroy value in the time of preferably, even only reach 40～50%.

The purpose of this utility model is under the situation that does not change production technology, provides a kind of steel using amount few, and cracking resistance, flexing resistance height, rupture load all satisfy a kind of pretensioning prestressed concrete porous plate that the design, destroy value requires.

The purpose of this utility model is achieved in that a kind of pretensioning prestressed concrete porous plate is made up of main muscle, concrete, and the light circle raw silk rings that it is characterized in that adopting waved wire to substitute and use in conventional the production is made the main muscle of inherent stress concrete porous plate.

Adopt the main muscle of waved wire as porous plate, its principle is: (1) waved wire can improve effectively to concrete adhesion stress, and the drag block that it and concrete form has bigger tensile strength, because it has three-dimensional mechanical property.(2) because waved wire has certain wavelength, its retraction angle of extruded concrete and dynamics should be able to make concrete obtain bigger compressive pre-stress than big many of raw silk rings mutually.(3) waved wire can make load effect weaken in the transmittance process of support point, thereby improves the actual anti-lotus ability of member, and it meets curve variable motion principle.

Advantage of the present utility model is: the one, improved the mechanical strength of inherent stress concrete porous plate, and product detects through legal quality testing department, and breaking resistance reaches standard 146%; Flexing resistance reaches 342% of standard; The 2nd, steel using amount reduces greatly, saves 25～38% than conventional steel using amount.

Below in conjunction with accompanying drawing the utility model is further set forth

Accompanying drawing is a cross-sectional view of the present utility model

With reference to accompanying drawing, waved wire 1 is as the main muscle of porous plate.The technological process of production of the present utility model is identical with existing technological process, promptly adopts pre-tensioning system that waved wire is carried out stretch-draw, tension stress

Get 0.75R ^b _y, available then long-line pedestal method; Extrinsion pressing; Any one moulding process in the anti-mold forming method is produced.

Claims

1, a kind of inherent stress concrete porous plate mainly is made up of main muscle, concrete, it is characterized in that: adopt waved wire to substitute the main muscle that conventional raw silk rings is made porous plate.