CN201416233Y

CN201416233Y - Steel bar welded mesh

Info

Publication number: CN201416233Y
Application number: CN2009201533402U
Authority: CN
Inventors: 李树堂; 殷西泰
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-03-13
Filing date: 2009-06-15
Publication date: 2010-03-03
Anticipated expiration: 2019-06-15
Also published as: CN201358549Y

Abstract

The utility model discloses a steel bar welded mesh, which is a grid mesh structure welded by transverse ribs and longitudinal ribs, wherein the width L of the mesh constituted by the transverse ribsis greater than or equal to 3.4m and smaller than or equal to 5.0m; and the nominal diameter of the transverse rib is 12, 14 or 16mm. The production of the steel bar welded mesh in the factory weldingprocess eliminates the bundling in the construction field, thus ensuring the construction quality and the construction speed; furthermore, two ends of the longitudinal rib are provided with folding hooks to stabilize the reinforced concrete structure.

Description

Welded steel fabric

Technical field

The utility model relates to building structural member, relates in particular to steel mesh reinforcement.

Background technology

In the reinforced concrete structure of construction work, need the layout steel mesh reinforcement to do skeleton and stressed arrangement of reinforcement.Traditional cage of reinforcement is artificial at the construction field (site) colligation, and the big efficient of labour intensity is low, and construction quality is difficult to guarantee.China began from external introduction welded mesh production line in 1987, the steel mesh reinforcement goods of special welding equipment welding occurred using in factory, was called welded steel fabric or net sheet.Welded steel fabric is widely used in building floor, bridge floor, tunnel, engineerings such as hydraulic engineering, express highway pavement.China Standard Press published " GB/T1499.3-2002 steel concrete welded steel fabric " national standard in 2003.

Since be subjected to condition restriction such as process equipment and transportation, the present national standard welded steel fabric of producing, width is generally 2.0～2.4m, and the wideest only is 3.3m; Length is not more than 12m, and from installation and transportation all conveniently, length generally is not more than 6 meters.Limited by welding equipment, the bar diameter of employing can not be too thick, and it is 5-12mm that cold rolling strap helps reinforcing bar and cold-drawn plain steel-bar, and the hot rolling band helps reinforcing bar only to be 6-16mm.So present known welded steel fabric can only be applicable to general Modular building engineering.Along with the reach of science and the development of the national economy need, some large-scale special construction works have appearred.The welded steel fabric of these some special types of requirement of engineering.For example in expressway construction, just need big, the horizontal wide special type reinforcing bar net of some net muscle diameters.Because of there not being the welded steel fabric of this special type at present,, influence speed of application, the cost height so manually colligation moulding at the construction field (site) is time-consuming.And cloth muscle inequality, colligation is not firm, and construction quality is difficult to guarantee.Though the engineering that has can be with existing GB welded mesh, because only 2 meters of the general net width of welded mesh of manufacturer production, so need lapped layup, it is many to connect stubble, generally overlaps 200-400mm by tecnical regulations, so also waste steel.

Present welded steel fabric is owing to be subjected to the restriction of process equipment, around the steel mesh reinforcement especially the both sides of width do not establish folding hook (or being straight crotch), and in reinforced concrete structure,, need design to go up and roll over hook for satisfying requirements such as stress condition, overlap joint.The welded mesh that the culvert that for example has needs just needs the folding hook in section corner and overlaps (as the siphon culvert hole of project of South-to-North water diversion), so existing welded steel fabric also can not satisfy this class designing requirement.

In a open file EP1741851A1, the horizontal bar elongated end that once disclosed a kind of welded steel fabric is provided with U type crotch, and this U type crotch is mainly used in the overlap joint on the width between plane structure two nets, can not be used for the connection of corner in the three-dimensional section.

Summary of the invention

The utility model provides a kind of welded steel fabric of special type for solving the needs of some large-scale special building engineerings.

A kind of welded steel fabric, it is the grid structure that is welded by horizontal bar and vertical muscle, it is characterized in that, the span of the net width (representing with L) that horizontal bar constitutes is: 3.4≤L≤5.0m, the nominal diameter of horizontal bar is 14mm.

Above-mentioned net width can be in the following formula a kind of: (rice of 3.3+0.1 * n), n gets an integer among the 0-17 to L=in the formula.

The reinforcing bar of also available nominal diameter 12mm of above-mentioned horizontal bar or 16mm replaces.

At least one end in above-mentioned vertical muscle two ends has the folding hook; The angle on described folding hook both sides is 45-90 °, and the bending part of folding hook is polyline shaped or arcuation.Described folding hook length is 30～60cm.

The nominal diameter of above-mentioned vertical muscle is 12mm, 14mm, 16mm, 18mm, 20mm, 22mm or 25mm.

Grid transverse bar spacing of the present utility model is the integral multiple of 50mm, and longitudinal bar spacing is the integral multiple of 25mm, and the minimum spacing of horizontal bar and vertical muscle is 100mm.

The net length that the vertical muscle of the utility model constitutes reaches 13 meters most, according to the produced in lengths of designing requirement or press length dimension intercept on the fourdrinier wire sheet.The intercepting back processes according to the design needs and goes up the folding hook.

Good effect of the present utility model is:

1. for providing, the construction work of large-scale special steel reinforced concrete meets the welded steel fabric that design of reinforcement requires, project of South-to-North water diversion flat trunk canal beautiful symbol river 34 bid section design reinforcement width (net wide) 4.3m that helps for example, the horizontal bar diameter of reinforcing bar * indulge the muscle diameter have following several specification: Closed conduits such as the Jiao Laihe of northern Shandong, Shandong water diversion project, Nanjing University Shahe, Lin Jiadong have all designed above-mentioned steel mesh reinforcement.Welded steel fabric of the present utility model satisfies the designing requirement of engineering such as above-mentioned.

2. the processing in batch of this welded steel fabric batch production welding procedure not be used in job site cloth muscle colligation, construction safety, and construction quality is guaranteed.And fast ten to tens times of speed of application.As one section 500 square metres netted arrangement of reinforcement, the colligation of on-the-spot artificial layout needs 30 people to finish in 20 days, and adopts welded mesh of the present utility model only to need 6 people can spread in 2 days.Saved the comprehensive cost of engineering construction greatly.

3, the folding hook of She Zhiing has satisfied the structure requirement of reinforced concrete works designed component, makes the reinforced concrete structure more stable.Be particularly useful for being connected around the corner between net and the net.

4. when being used for roomy engineering, reduce overlapping the slot, save reinforcing bar.As design the wide engineering of 15m, if need five oblique cut graftings with existing 3m wide screen sheet, four lap belts appear; The net sheet wide with the utility model 5m only needs three on width, two overlapping the slot, and 400mm calculates by overlap joint, saves steel 7%.

Description of drawings

Fig. 1 is the front view of the utility model band folding hook embodiment; Fig. 2 is the left view of Fig. 1; Fig. 3 is the vertical view of Fig. 1; Fig. 4, Fig. 5 are the shape figure of folding hook; Fig. 6 is that the layout profile that the folding hook is used for culvert is established at the horizontal bar two ends.

Among the figure: the 1-horizontal bar; 2-indulges muscle; 3-rolls over hook.

The specific embodiment

For ease of understanding technical solutions of the utility model, a kind of embodiment is described with reference to Fig. 1, Fig. 2 and Fig. 3.

As shown in the figure, this welded steel fabric is required to be welded by the netted arrangement of reinforcement that horizontal bar 1 and vertical muscle 2 design according to concrete work, and wherein horizontal bar 1 two ends are provided with the folding hooks 3 of 90 degree.Adopt the resistance-type welding machine of mesh of 5 meters of width during welding, the interface point of reinforcing bar is welded with the resistance welding process.The applicant has developed the resistance-type welding machine of mesh and the complete production line thereof of 5 meters of width, the soldering tip of this welding machine of mesh reaches 36-40, the electric current of each soldering tip output 9V, 16000-18000A, the soldering tip spacing is adjustable, can satisfy the production requirement that the application's net is wide and bar diameter is thick.

The specifications parameter of the embodiment of 14 kinds of different-diameter horizontal bars and vertical muscle welded mesh is provided in the table 1.

Table 1

Net width L begins every 0.1m from 3.4m and advances one-level up to 5m in the last table, and (rice of 3.3+0.1 * n), n gets an integer among the 0-17 in the formula to be formulated as L=.

The grid size of last table welded steel fabric is that transverse bar spacing a * longitudinal bar spacing b is preferred following several:

200 * 150mm, 200 * 125mm, 150 * 150mm, 150 * 200mm, 200 * 200mm, 250 * 150mm, 300 * 150mm, 100 * 100mm, 250 * 125mm, 300 * 125mm, 300 * 150mm or 300 * 175mm.

Fig. 4 and Fig. 5 show the shape of 90 ° of folding hooks, and its bending part of folding hook shown in Fig. 5 is a polyline shaped; Its bending part of folding hook shown in Fig. 4 is an arcuation.The shape of bending part is that polyline shaped or arcuation are decided by bending method and bending equipment.

The application's embodiment is not limited to Fig. 4 and 90 ° folding hook shown in Figure 5.Applicant's specialized designs folding hook former, with all folding hook once-formings of the arbitrary end of welded steel fabric, forming quality is good, process velocity is fast.

Fig. 6 shows the profile of a certain rectangle culvert, there is shown the welded mesh bonding state around the corner that the horizontal bar two ends are provided with the folding hook.

Claims

1, a kind of welded steel fabric, it is the grid structure that is welded by horizontal bar and vertical muscle, it is characterized in that, the span of the net width L that horizontal bar constitutes is: 3.4≤L≤5.0m, the nominal diameter of horizontal bar is 14mm.

2, welded steel fabric as claimed in claim 1 is characterized in that, described net width L gets a kind of in the following formula: L=, and (rice of 3.3+0.1 * n), n gets an integer among the 0-17 in the formula.

3, welded steel fabric as claimed in claim 1 is characterized in that, horizontal bar replaces with the reinforcing bar of nominal diameter 12mm or 16mm.

4, welded steel fabric as claimed in claim 1 is characterized in that, at least one end in described vertical muscle two ends has the folding hook.

As claim 1,2,3 or 4 described welded steel fabrics, it is characterized in that 5, at least one end in horizontal bar two ends is provided with the folding hook.

6, welded steel fabric as claimed in claim 5 is characterized in that, the angle on described folding hook both sides is 45-90 °, and the bending part of folding hook is polyline shaped or arcuation.

7, welded steel fabric as claimed in claim 6 is characterized in that, described folding hook length is 30～60cm.

8, welded steel fabric as claimed in claim 5 is characterized in that, the nominal diameter of described vertical muscle is 12mm, 14mm, 16mm, 18mm, 20mm, 22mm or 25mm.

9, welded steel fabric as claimed in claim 8 is characterized in that, described grid transverse bar spacing is the integral multiple of 50mm, and longitudinal bar spacing is the integral multiple of 25mm, and the minimum spacing of horizontal bar and vertical muscle is 100mm.

10, welded steel fabric as claimed in claim 9, it is characterized in that described grid transverse bar spacing * longitudinal bar spacing is a kind of in the following specification: 200 * 150mm, 200 * 125mm, 150 * 150mm, 150 * 200mm, 200 * 200mm, 250 * 150mm, 300 * 150mm, 100 * 100mm, 250 * 125mm, 300 * 125mm, 300 * 150mm or 300 * 175mm.