Core Viewpoint - The construction of the Huajiang Gorge Bridge, which began in January 2022, showcases innovative technologies and engineering solutions, establishing it as a significant national project and the world's highest bridge upon its completion in September 2025 [1][12]. Group 1: Construction Timeline - The bridge construction commenced in January 2022 [1] - Main cable traction construction started in April 2024 [3] - The bridge deck successfully connected in January 2025 [6] - Load testing was conducted in August 2025 with 96 heavy trucks weighing over 3,300 tons [10] - The bridge was officially opened for traffic on September 28, 2025 [12] Group 2: Technological Innovations - The bridge features the world's first "smart cable" embedded with fiber optics for real-time monitoring of the main cable's health [4][12] - The main cable, consisting of 217 strands each made of 91 wires, incorporates three smart cables for monitoring stress, temperature, and humidity [17] - The innovative "smart cable" system automates humidity control to prevent corrosion, significantly extending the cable's lifespan [17] Group 3: Engineering Breakthroughs - The bridge's saddle structure was transformed from traditional casting to a forged structure, reducing the weight of individual components to 41.3 tons while increasing compressive strength by 44% [19] - The construction team utilized finely ground dolomite as a substitute for fly ash, ensuring the quality of 160,000 cubic meters of concrete while saving approximately 5 million yuan [23]

8月20日，航拍新市金沙江特大桥。张元戎 摄（C视觉） 新市金沙江特大桥合龙现场。宜宾观察 罗顺 摄 控制性工程 ●新市金沙江特大桥连接四川屏山县新市镇与云南绥江县南岸镇，是宜攀高速重要控制性工程之一 ●全长1867米，主跨680米，是川滇最高索塔斜拉桥，也是四川省内同类型在建最大规模的钢桁梁斜拉桥 ●宜攀高速全线建成通车后，宜宾至攀枝花车程有望从10小时缩短至6小时左右 解决复合型难题 ●在国内首创板桁结合主梁形式，将桥体设计为多层结构，解决桥面易"疲劳"开裂问题 ●在距离合龙点300余米处设置两台牵引装置，逐步拉出足以安装最后一段钢结构体的空间，这项无应力合龙 技术处于国内领先水平 川滇交界处，宜宾市屏山县新市镇，金沙江在这里拐出一个几字弯，人们依水而居又因水分隔。如今，又一 座跨越金沙江的大桥在这里连接川滇—— ●大桥上布设的200余个智能传感器，将实时数据反馈至智慧管控平台，确保桥梁线性控制精准 传统钢桥的桥面容易出现"疲劳"开裂问题，为此，建设团队在国内首创板桁结合主梁形式，将桥体设计为多 层结构。其中，最底部的钢桁架提供力量支撑，其上覆盖一层钢板，接着在桥面上现场浇筑钢筋混凝土面板，最 后铺设沥青 ...