深中通道中山大桥主塔设计

Design of Main Tower of Zhongshan Bridge in Shenzhen-Zhongshan Link

深中通道中山大桥为双塔钢箱梁斜拉桥,跨径布置组成为110m+185m+580m+185m+110m,全长1 170m。主塔为H形塔,自承台顶面以上塔高213.5m,主要特点为塔柱采用新颖的不规则多边形截面、塔底连接系梁兼顾景观及结构受力、索锚区预应力布置受限、横梁预应力交叉锚固于横梁中部以避开塔柱开槽。对此,文中主要介绍桥塔结构设计、关键技术研究及计算分析结果。

Zhongshan Bridge,which is located at Shenzhen-Zhongshan link,is a cable-stayed bridge with steel box girder and two towers.The span layout is 110 m+185 m+580 m+185 m+110 m,with a total length of 1 170 m.The main tower is a H-type tower,with a height of 213.5 m above the top of the bearing platform.The main features include the novel irregular polygon section of the tower column,the connecting girder of the tower bottom which gives consideration to the landscape and structural stress,the limiting prestress distribution in the cable anchor area,and the cross anchoring of beam prestress tendons in the middle of the beam to avoid column groove.The design of bridge tower structure is mainly introduced,and the research on key technology and calculation analysis are performed.