宁波新典桥主桥设计

摘要:

宁波新典桥以 “甬”为设计立意：主拱的线条寓意“甬山”, 行人步道的线条寓意“甬水”两者组合一个整体,形成一个“甬动山水”整体意向。创造性地采用带有悬挑慢行系统的下承式系杆拱桥,跨径213m(桥长221.6m),拱轴线采用1.7次抛物线,拱肋采用六边箱型截面,拱肋上设置两组风撑,每组三道。系梁采用单箱单室断面,与正交异性桥面系采用焊接连接。悬挑慢行系统布置在主梁两侧,主要包括三个部分：副拱(装饰拱)、挑臂系统、挑臂人行道系统。主梁端部设置牛腿支撑引桥。拱上梁上锚固均采用吊耳构造,吊杆采用抗拉强度1860MPa的填充型环氧涂层钢绞线。主墩下采用钻孔灌注桩(摩擦桩)。

Abstract:

The design concept of Xindian Bridge is "Yong": the lines of the main arch signify "Yongshan", and the lines of the pedestrian walkway signify "Yongshui" as a whole, forming an overall intention of "Yongshan water". Creatively adopts a through-type tied arch bridge with a cantilever slow-moving system, with a span of 213m (bridge length 221.6m), the arch axis adopts a 1.7 parabola, the arch rib adopts a six-sided box section, and two sets of arch ribs are set Brace wind, three in each group. The tie beam adopts a single-box single-chamber section, and is connected with the orthotropic bridge deck by welding. The overhanging slow-moving system is arranged on both sides of the main beam and mainly consists of three parts: auxiliary arch (decorative arch), cantilever system, and cantilever sidewalk system. Corbels are provided at the end of the main beam to support the approach bridge. The anchoring on the upper beam of the arch adopts the lifting lug structure, and the suspension rod adopts the filled epoxy-coated steel strand with the tensile strength of 1860MPa. Bored piles (friction piles) are used under the main pier.