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水泥混凝土桥面沥青层铺装从材料组成及结构组合来看属典型的“刚柔复合”式路面结构,水泥混凝土桥面板属刚性材料,板体刚度大,模量高;其上铺筑的沥青混合料铺装层属柔性材料,刚度小,模量相对较低,通常二者模量相差一个数量级。加之桥梁结构自身存在的振动,伸缩及受弯变形,由于桥梁结构特性的要求,在沥青铺装层施工时一般禁止开强震,导致桥面铺装局部压实度不足,空隙率偏大,以上种种因素都对桥面铺装的质量和后期使用性能造成不同程度的影响。本文阐述了提高桥面铺装平整度的具体措施,使其达到技术要求。
Cement concrete bridge deck asphalt pavement from the material composition and structure of combination is a typical “rigid-flexible composite ” pavement structure, cement concrete bridge deck is a rigid material, plate stiffness, high modulus; the shop Asphalt paving is a flexible material, with low stiffness and relatively low modulus, often an order of magnitude different between the two. Coupled with the inherent vibration, telescoping and bending deformation of the bridge structure, due to the structural characteristics of the bridge, it is generally forbidden to open strong earthquakes during the construction of the asphalt pavement, resulting in insufficient local compaction of the deck pavement and large void ratio, All of the above factors affect the quality and post-use performance of the bridge deck to varying degrees. This paper describes the concrete measures to improve the smoothness of deck pavement to meet the technical requirements.