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2、世界首次采用混凝土结构做中塔
过去类似于桥梁的中塔一般采用的都是钢筋结构,但钢塔一般桥梁只能做到三塔,这次创造性地用混凝土结构做中塔,成功以后,对今后做五塔、七塔甚至更多塔悬索桥结构都成为可能。也就是说,掌握了这项技术,今后建造长距离的跨海悬索大桥将会成为可能。毕竟,它的造价比现在常见的长距离跨海斜拉桥要低,整体刚度更强。
3、世界首次在淤泥土质中用沉井做基础
以前类似的桥梁,一般都采用桩基础,桩基础对船舶的防撞能力比较弱,对基础的防冲刷能力也比较弱,所以这座桥采用了大体积的沉井做基础,将很好地改善这两点。
这个沉井的平面面积3600多平方米,相当于9个标准篮球场大小;高68米,相当于20层楼高度;重达1.8万吨,相当于15000辆小汽车重量之和。
瓯江北口大桥这三项创造性的突破代表了我国现有的桥梁建设水平,并为世界桥梁建造提供了有益的借鉴。
责任编辑:陈倩 CN030
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