Main Products

Category

Contact Us

  • Contact: Alice
  • Tel : +86-318-7533332
  • Skype: boyangmesh
  • E-mail: sales@apmesh.com
  • More Contact >>

News

Your current location :Home > News > The application of steel bar welded mesh

The application of steel bar welded mesh

1, the steel fabric in the application of highway cement concrete pavement engineering
With the smallest diameter of steel fabric reinforced concrete pavement and the largest spacing should be consistent with the current industry standard "code for design of highway cement concrete pavement JTG old D40 rules. When using cold-rolled ribbed steel bar, steel bar diameter should not less than 8 mm, longitudinal reinforcement spacing should not be greater than 200 mm, transverse reinforcement spacing should be not greater than 300 mm. Welding net of vertical and horizontal to the appropriate USES of the same diameter steel, steel protective layer thickness should be not less than 50 mm. Reinforced concrete pavement reinforcement with welded mesh is according to the relevant provisions of the reinforced concrete pavement with welded mesh.
(1), concrete pavement with fixed structure cohesion of the expansion joint not set dowel bar, can be in adjacent to the structure of the division has double steel plate; Or the length of about 6 a 10 times the thickness range of thickness gradually increased by 20%.
Diction, concrete road and bridge, the bridge has a strap, shall be installed between the strap and concrete pavement plate, 6 a 10 mm long reinforced concrete surface transition board. When the bridge is oblique, the acute Angle of reinforced concrete slab section steel mesh reinforcement should be adopted.
(3), concrete surface has a box structure under horizontal cross, its top surface to surface underside of distance is less than 400 mm or embedded at the grass-roots level, 8 in structure and two side, the concrete surface should be laying double steel fabric, on the lower steel mesh is apart from the top of the surface and bottom 1/4 thickness of a third place.
Concrete pavement has a circular tubular structure under the lateral through, its top surface to surface underside of distance less than 1200 mm, on both sides of structure, the concrete surface should be setting monolayer steel mesh, mesh reinforcement in is apart from the top of the layer thickness of 1/4 a 1/3 place.
From the industry standard "code for design of highway cement concrete pavement JTG old D40-2002
The application of 2, steel mesh in bridge engineering
Is mainly used in municipal bridge and highway bridge deck pavement, old bridge, bridge pier crack, etc. Application engineering quality acceptance by thousands of domestic bridge shows that the welding net significantly improve the quality of the surfacing layer, layer thickness of the percent of pass is up to more than 97%, the deck roughness increases, the deck almost no cracks and pavement speed increased by more than 50%, reduce the cost of bridge deck pavement engineering of about 10%. The steel bridge deck pavement layer should be used for welding net or prefabricated cold-rolled ribbed steel mesh, unfavorable use of banding steel fabric. The diameter of the bridge deck pavement with mesh reinforcement and spacing should be determine according to the bridge structure form and load level. Steel mesh spacing can be used 100 - a - 200 - mm, appropriate USES 6 a l00mm its diameter. Longitudinal and transverse reinforcement fabric appropriate USES equal spacing, welding net from the top surface protective layer thickness should be not less than 20 mm.
3, steel fabric in the application of tunnel lining
According to the national standard specifications for design of highway tunnel JTGD70-2004.
In sprayed concrete shall have ribbed steel fabric, which is beneficial to improve the shear and bending strength of sprayed concrete, concrete cutting resistance, resistance to bending capacity, improve the integrity of the shotcrete and reduce spray concrete shrinkage crack, prevent local impellers. Steel mesh should be according to the rectangular grid layout, steel mesh reinforcement spacing of 150 ~ 300 mm. Can use 150 mm * 150 mm, 150 mm * 200 mm, 200 mm * 250 mm, 250 mm * 300 mm, 300 mm * 300 mm combinations. Steel fabric in the lap length should be not less than 30 d for the steel bar diameter (d).
Thickness of steel fabric shotcrete layer shall not be less than 20 mm, when double steel mesh is used, the distance between two layers of steel mesh should not be less than 60 mm.