2000MPa超强度钢丝项目介绍范例.ppt

广东虎门二桥项目设置东涌、骝东(规划预留)、海鸥岛、沙田4处互通立交和两座特大桥。 两座跨江特大桥梁，主跨分别为1200米、1688米，其中: 坭洲水道桥为658+1688米的双塔双跨钢箱梁悬索桥，桥跨布置为658+1688+518m； 大沙水道桥为1200米双塔单跨钢箱梁悬索桥，桥跨布置为360+1200+480m。 Item Technical performance requirements ? ? Diameter 1 Diameters and tolerances Φ5.0 （ ±0.06 ） mm 2 Out of roundness ≤ 0.06mm 3 Nominal cross-sectional area 19.6 （ ±0.47 ） mm2 4 Theoretical weight 153 （ ±4 ） g/m ? ? Mechanical performance 5 Tensile strength at breaking ≥ 1960MPa 6 Tensile strength at yield ≥ 1580MPa 7 Relaxation ≤ 7.5% 8 Elongation ≥ 4% L=250m 9 Modulus of elasticity （ 2 ± 0.1 ） ×105MPa 10 Bending test ≥ 4 times 11 Wrap test D=3d ,8 circles, no damage, no cracks 12 Torsion test L=100d,≥ 8 twists, no delamination fracture 13 Fatigue test Cable Stress amplitude :200MPa , Wire fatigue stress 360MPa (Upper stress: 0.45 σ b ，Number of cycles: 2Million ) Coating quality 14 Weight of zinc coating ≥ 300g/m2 15 Copper sulfate test ≥ 4 times 16 Adhesion of zinc coating 8 circles 17 Appearance quality Steel wire’s surface should be smooth, even and no scar, cracks, burrs, mechanical damage, oil, rust and harmful attachments Straightness 18 Wire free upright height L=5m ≤ 15cm 19 Free bending diameter ≥ 8m 20 Wire length ? Technical requirements for Hu Men bridge main cables Item Technical performance requirements ? ? Diameter 1 Diameters and tolerances Φ5.15 （ ±0.06 ） mm 2 Out of roundness ≤ 0.06mm 3 Nominal cross-sectional area 20.8 （ ±0.49 ） mm2 4 Theoretical weight 162 （ ±4 ） g/m ? ? ? Mechanical performance 5 Tensile strength at breaking ≥ 1960MPa 6 Tensile strength at yield ≥ 1580MPa 7 Relaxation ≤ 7.5% 8 Elongation ≥ 4% L=250m 9 Modulus of elasticity （ 2 ± 0.1 ） ×105MPa 10 Bending test ≥ 4 times 11 Wrap test D=3d ,8 circles, no damage, no cracks 12 Torsion test L=100d,≥ 8 twists, no delamination fracture 13 Fatigue test Cable Stress amplitude :200MPa , Wire fatigue stress 360MPa (Upper stress: 0.45 σ b ，Number of cycles: 2Million ) Coating quality 14 Weight of zinc