摘要
洪奇门特大桥是国高G2518和省高S78的重要组成部分,处于粤港澳大湾区核心位置,主桥为双塔双索面斜拉桥。总体方案构思根据桥址环境调研及视点分析确定了"湾区之心"的设计理念,抽取出基本造型元素水滴和木棉花。运用黄金分割法对桥梁的立面比例进行了分析与优化,优化后的立面比例为(67+176+520+176+67)m。运用元素造型法进行造型设计,斜拉索为对称布置的扇形索面,主梁为带风嘴的扁平钢箱梁。桥塔造型以宝瓶形桥塔为基础,上塔柱进行了合拢设计;塔柱转折区采用弧形过渡,塔柱采用梯形截面设计;下塔柱内收,塔柱内层作圆滑处理,呼应水滴元素;塔冠设计融合木棉花的造型元素。根据视点调研分析检验桥塔造型效果,大桥造型独特,与设计理念呼应。
The Hongqimen Bridge,located in the core of the Guangdong-Hong Kong-Macao Greater Area,is a vital portion of the G2518 and S78 expressways.The main bridge is a two-pylon cable-stayed bridge with stay cables fanned out in double cable planes.In the overall design,the concept of " Heart of Bay Area" was conceived based on the survey of the environment at the bridge site and the vantage point analysis,and the fundamental aesthetic elements of water drop and kapok flower were extracted.The elevation distribution of the bridge was analyzed and optimized by the golden section method,creating spans of 67,176,520,176 and 67 m.Based on the aesthetic elements selected,the bridge was designed,with stay cables arranged in symmetrical fan planes and the main girder formed of flat steel boxes with wind vanes.The pylons are vase-shaped,with upper pylon columns specially treated to make a closure.The kinked areas of the pylon columns are transitioned by arc and the pylon columns are of trapezoidal cross section.The lower pylon columns incline inwardly,with smooth and sleek inner walls to respond to the water drop element.The crown of the pylon draws the image of the kapok flower.The aesthetics of the bridge pylon was analyzed and checked by the vantage point analysis,to confirm the unique aesthetic features that echo the design concept.
作者
杜洪涛
DU Hong-tao(Guangzhou Communications Investment Group Co.,Ltd.,Guangzhou 510288,China)
出处
《世界桥梁》
北大核心
2020年第4期6-10,共5页
World Bridges
关键词
斜拉桥
方案设计
桥梁造型
造型元素
视点分析
黄金分割法
cable-stayed bridge
scheme design
bridge aesthetics
aesthetic element
vantage point analysis
gold section method
