青岛海湾大桥李村河收费广场混凝土铺装施工技术

Concrete Pavement Construction Technology of Licunhe Toll Square of Qingdao Bay Bridge

青岛海湾大桥李村河收费广场采用混凝土铺装,广场面积为11 500m2,铺装层厚度为13cm,中间铺设2排呈正交分布的钢筋。根据铺装层施工条件的特点,确定混凝土浇筑时坍落度应控制在(120±10)mm,采用低水胶比并掺入平均长度为6mm的聚丙烯腈纤维,使得混凝土满足工作性能及长期耐久性的各项指标要求。建立了适用的浇筑、振捣、养护制度以及刻槽工艺,保证了收费广场铺装混凝土的质量。

Concrete pavement style is applied in Qingdao Bay Bridge Licunhe Toll Square with 11 500 m2 in area.There are two layers reinforced bar laid in perpendicular way in the only 13cm-thickness thin pavement layer.Based on the pavement construction condition,the slump on construction site is controlled in（120 ± 10） mm.Low water to binder ratio of 0.33 and polyacrylonitrile,whose average length is 6mm,are used to assure the workability and durability of concrete to satisfy the design and standard requirement.The quality of pavement concrete is controlled through using applicable pouring,vibrating,curing system and notching craft.