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Tunnel Reinforcing Mesh,Subway steel bar mesh, Culvert reinforcement mesh Matters needing attention in construction
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Tunnel Reinforcing Mesh,Subway steel bar mesh, Culvert reinforcement mesh Matters needing attention in construction
Tunnel Reinforcing Mesh,Subway steel bar mesh, Culvert reinforcement mesh Matters needing attention in construction
ClassificationWater and electricity construction industry
Release date2015-10-12
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Introduction

Tunnel Reinforcing Mesh,Subway steel bar mesh, Culvert reinforcement mesh


Tunnel welded steel mesh reinforcement can significantly improve project quality and improve construction speed, crack resistance of reinforced concrete, with better overall economic efficiency.

In the high-speed railway tunnel, the steel bar welded mesh mainly from the reinforcing and supporting role, welded steel mesh is arranged in the early support, will make the initial support shotcrete easier, as secondary lining of steel, plays a skeleton is high-speed rail tunnel stronger and safer.


reinforcing mesh arch structuretunnel reinforcing mesh concrete effect                    

 

                             Data of Tunnel Reinforcing Mesh (4mm and 6mm)
         Rebar diameter               mm                      4                     6
          Spacing               mm                                            100x100
       Breaking load                kn                    > 20                 > 28.3
      Ultimate strength             N/mm2                                              >1000
      Tensile E-Modulus             N/mm2                                              >40000
          Load at knot                Kn                1>x>3                    3>x>5
      Overall dimensions               mm                              2000x800   As your require
              Weight                g                   1500                     1800

   Advantages

1) Non-corrosive

2) Tensile strength is more than twice that of steel

3) Non-metallic and non-conductive

4) Consistent modulus of elasticity

5) Deformation patterns are the same as with steel

6) Four times lighter than steel

7) Pre-fabricated ACI standard angles and bends available

8) Coefficient of thermal expansion more similar to concrete than that of steel

9) Direct production costs lower than similar steel bolt

 


Application

1)Tunnels and culverts

2)mine tunnel

3)Civil Engineering

4)seawall dock

5)Military Engineering

6)Roads and Bridges

7)Airport Runway

8)mountain slope support

9)formwork and reinforced concrete work


Tunnel reinforcing mesh: 

reinforcing mesh shotcrete before the shotcrete, located in the rock face hanging steel mesh, and then sprayed concrete.At present, China used in various types of tunnel construction steel mesh shotcrete support more, mainly used in soft and fractured surrounding rock, but more to do with bolt or constitute joint steel arch support.Often reinforced Netcom circumferential and longitudinal arrangement.Circumferential rib muscle force is generally determined by the design, a diameter of about 12mm; longitudinal ribs usually structural reinforcement, diameter 6 ~ 10mm; mesh size is generally 20cmx20cm, 20cmx25cm, 25cmx25cm, 25cmx30cm or 30cmx30cm.


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Coal steel mesh, supporting mesh Construction Notes:


1, the bottom of sprayed concrete thickness of not less than 4cm.

    

2, double hanging steel mesh, the second layer to the first layer of steel mesh steel mesh covering the final setting of concrete after being laid.

    

3, reinforced mesh with the spray face ups and downs at the beginning of laying and clearance by the spray surface is not less than 3cm, and the bolt or other securing means coupling firmly.

    

4, steel mesh lap length is 1 to 2 mesh, welded, tolerance of 50mm.

    

5, when hanging off the rocks or concrete blocks, steel card when it is live, should be promptly removed.

    

6, welders must wear protective clothing when welding, standing on the wood or other insulating material.

    

7, welding lines and equipment in line with "a machine a gate, a box of a protection."

    

8, construction closely observe spalling and collapse of surrounding rock or shotcrete, note holder or stability of the slag heap.

    

In addition, the protective layer thickness can not be less than 30mm. Mesh to form a whole, welded to firmly place.

After the system bolt steel mesh install facilities for the reinforced type and grid spacing according to design requirements, the first outside the cave made mesh. Installed in the cave, and the beginning of sprayed concrete surface gap is not greater than 3cm, steel mesh and anchor intersection welded together, so that when the spray is not easy reinforcing mesh shaking. Install steel mesh should pay attention to: respond before making steel bar straightening, rust and oil, to ensure construction quality.


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