之江大桥主桥为拱形钢塔斜拉桥,由于桥位受地理条件的影响,大型的水中吊装设备无法进场,施工的难点在于超大型水中拱形钢塔的安装。由于此类钢拱塔的安装为国内目前最大的水中钢拱塔,无成型的经验可借鉴,为了安全、优质地完成索塔安装,对索塔安装方案进行了多个方案的对比,以选择最优方案进行施工。 The main bridge of Zhijiang Bridge is an arch-type steel tower cable-stayed bridge. Due to the influence of geographical conditions, large-scale underwater lifting equipment can not enter the market. The difficulty of construction lies in the installation of large-scale arched steel towers in water. As the installation of such steel arches is currently the largest steel arch in water in China, there is no molding experience to draw lessons from. In order to complete the installation of the pylon safely and with good quality, The best program for construction.