Shijiazhuang Railway Line Protection Fence Price, High-Speed Railway Subgrade Concrete Guardrail Manufacturer

Railway Protective Fencing - Complies with Technical Standards

2.1 General Reference Drawings for Railway Engineering Construction (Railway Line Fencing) (Open Line (2012) 8001), (Bridge Under Fencing Open Line (2012) 8002).

2.2 The metal mesh panels are designed for a lifespan of 15 years.

3. Rail Protection Fence Technical Requirements

3.1 Reinforced concrete pillar metal mesh fence consists of pillars, mesh panels, and connecting parts, with a protective height of 1.8 meters.

3.2 Piling

Pillars are prefabricated with C30 reinforced concrete, with a cross-sectional size of 120mm x 120mm and a height of 2.2 meters. During prefabrication, a square hole measuring 42mm x 42mm with a depth of 150mm is left in the center of the top. Upon on-site installation, a 40mm x 40mm square tube with a 2.5mm thickness, fitted with a connecting plate and sealed, is inserted. Half of the gap is filled with waterproofing material. The tube extends 150mm and the exposed portion is bent outward at 30 degrees, with a vertical height of 300mm.

3.3 Metal Mesh Sheets

Metal mesh panels are framed with Q235 square tubes, size 30mm*50mm, tube thickness 2.0mm; the internal mesh wires are cold drawn from HPB300 6.5mm high-carbon steel wire, size 75mm*150mm (diameter 4.0mm), with a 30° outward fold at the top, and a vertical height of 300mm.

3.4 Connector plate and bolts.

Pole connecting plates and mesh connecting plates are made of 90° bent Q235 steel plates with a thickness of 4.0mm, available in three types: A, B, and C, depending on the installation location. Both the connecting plates and bolts are made of Q235 steel and are galvanized, with a galvanized coating of 270g/m².

Connector plate precision requirements: Length tolerance ≤ 1.0mm, width tolerance ≤ 0.5mm, thickness tolerance ≤ 0.5mm, hole position deviation ≤ 1.0mm.

3.5 The metal mesh and grille door mesh should be galvanized as a whole after forming and then undergo hot dip galvanizing (or spray painting) treatment. The galvanizing amount should be 270g/m2, the immersion coating thickness should be 0.8mm to 1.2mm, and the spray painting color should be chosen as black green. The coating should be even, consistent in color, smooth on the surface, without drips, lumps, powder bubbles, and iron leakage defects.

Mesh manufacturing precision requirements: Length tolerance ≤ 2.5mm, height tolerance ≤ 3.0mm.

Mesh flatness requirement: Bulge or indentation ≤ 5.0mm.

Galvanized wire after cold drawing has a diameter tolerance of ≤0.06mm. Welded wire mesh has a hole size tolerance of ≤3.0mm.

When welding the connecting plates of welding mesh, the welding position of the connecting plates should be strictly controlled at the design location, with the position error ≤1.5mm.

The welding of rectangular tube frames with connecting plates, wire mesh with steel plates, and wire mesh with rectangular tube frames should preferably be done using resistance welding. If brazing is used, appropriate brazing rods should be selected to minimize deformation. Weld slag should be cleaned after welding. Deformations caused by welding should be flattened. To ensure sufficient strength of the wire mesh itself, the strength of the welding points should be greater than 1kN, and the number of weld points dropping off should be less than 4%.

Related Products: Railway Isolation Fencing, Reference Diagram for Railway Line Protection Fence