大跨径钢-混凝土组合结构桥梁桥面铺装材料的研究与应用

Research and Application of Deck Pavement Materials in Long-span Steel-concrete Composite Bridges

目的 针对大跨径钢-混凝土组合结构桥梁服役过程中对铺装层材料的性能需求,提出高黏高弹薄层铺装结构与材料,为该类桥梁桥面铺装工程提供参考。方法 开发粘韧性能优异的高黏高弹改性沥青材料,提出1 cm高黏高弹防水粘结应力吸收层+5 cm高黏高弹SMA沥青混凝土的薄层大跨径桥面组合铺装方案,研究铺装层的服役性能规律。结果 高黏高弹防水粘结应力吸收层可阻止钢-混凝土组合结构桥梁中混凝土板的裂缝反射,具有优良的防水与粘结性能;高黏高弹SMA磨耗层具有优异的水稳定性能、高温稳定性能、低温抗裂性能与抗滑性能。结论 笔者提出的组合铺装结构与材料在武汉鹦鹉洲长江大桥中成功应用,可有效防止铺装层服役过程中出现推移、拥包、开裂等桥面病害。

Based on the reinforced concrete structure bridge for the requirement of pavement material and structure in the process of service,this paper has developed high-viscous and high-elastic asphalt key materials with the excellent performance of viscidity and toughness,has designed the scheme of pavement of high-viscous and high-elastic stress-absorbing waterproof interlayer and high-viscous and high-elastic SMA asphalt concrete layer,and comprehensive studies for performance were carried out.The results show that the crack reflection of concrete slab of the reinforced concrete structure bridge can effectively be prevented by the stress-absorbing waterproof interlayer and it has outstanding waterproof and bonding performance.High-viscous and high-elastic SMA asphalt concrete layer has excellent water stability,high temperature stability,low temperature anti-cracking and skid-resistance and noise-reducing performance.The scheme of pavement has applied in Wuhan Parrot Island Bridge and the effect is outstanding.