金昌路跨运河斜靠式钢箱拱桥总体设计

Overall Design of Leaning Steel Box Arch Jinchang Rd.Bridge across the Canal

杭州市金昌路跨运河桥为单跨130 m斜靠式钢箱拱桥,横向设4片拱肋,主拱肋铅直布置,副拱肋位于主拱肋外侧,内倾17.5°,由主副拱形成横向稳定体系,主拱不设置风撑。桥面为纵横梁体系、桥面板为正交异性板。桥梁为无系杆拱体系,拱脚水平推力相对较大,综合考虑软土地区的地基加固措施,对拱脚背侧予以处理,有效提高了土体水平抗推能力。

The bridge,which crosses the Canal in Hangzhou Jinchang Road,is a leaning steel box arch bridge with single span 130 m,there are four pieces of arch ribs located in transverse direction, the main arch rib is arranged in vertical direction, and the vice arch rib is outside of it,which inwardly inclines 17.5°.The lateral stability system is formed by the main and vice arch,and wind bracing is not set in the main arch.Bridge deck is a system of the vertical and horizontal beams,and the deck slab is orthotropic plate.For no tied arch bridge,the horizontal thrust in the arch foot is relatively large. Considering the soft soil foundation reinforcement, some measures are adopted to deal with the side of the instep arch,which can effectively improve the horizontal anti-thrust ability of the soil.