明州大桥钢桥面铺装层ERS施工技术

Construction Techniques for ERS of Steel Deck Surfacing Layer of Mingzhou Bridge

为了解决钢桥面板与铺装层间防水、抗滑移、高温稳定等问题,宁波明州大桥主桥钢桥面板铺装层采用树脂沥青组合体系(ERS)桥面铺装技术,桥面铺装结构组成为40mm高粘改性沥青(SMA-13)+改性沥青防水粘结层+25mm环氧沥青混凝土(RA05)+环氧粘结碎石层(EBCL)。通过对钢桥面板喷砂除锈,达到Sa2.5级;按比例混和EBCL胶料,分2层涂刷,同时洒布碎石;摊铺RA05混合料,并用胶轮压路机碾压,在其固化后洒布防水粘结层;摊铺SMA-13沥青混凝土层,采用钢轮+胶轮+钢轮的组合方式碾压,确保了ERS施工质量,桥面铺装效果良好。

To cope with the problems of the waterproof, slip resistance and high temperature stability of deck surfacing layer with steel deck plate, the deck surfacing technique of epoxy resin asphalt system （ERS） was applied to the steel deck surfacing layer of the main bridge of the Mingzhou Bridge in Ningbo. The structure of the surfacing layer of the bridge comprised 40 mm high viscosity modified asphalt （stone mastic asphalt, SMA-13）@waterproof binding layer of the modified asphalt@25 mm epoxy resin asphalt concrete （RA05）@epoxy bond crushed stone layer （EBCL）. After the steel deck plates of the bridge were sand blasted to the rust removal level of Sa2.5, the binder for the EBCL was blended according to its proportion and was then brushed on- to the deck plates in two layers. At the same time, the crushed stones were spread, the RA05 was laid and compacted by the rubber wheel road roller. When these surfacing materials were set, the SMA 13 was laid and was compacted by the combined way of the steel wheel＋rubber wheel＋steel wheel. With the technique, the construction quality of the ERS was guaranteed and the sound effect of the deck surfacing of the bridge was achieved.