深水大跨桥梁施工技术2020年度研究进展

State-of-the-art review of the construction technology in deep-water long-span bridges in 2020

随着我国经济实力的不断增强、科学技术水平的显著提升,桥梁工程正朝着跨度更大、基础更深、桥塔更高的方向快速发展。在此过程中,桥梁建设者遇到了很多新难题,例如:深水基础浮运下沉过程中精准定位、超大型沉井基础防冲刷、大直径钻孔桩施工、大跨度斜拉桥索塔锚固构造优化、超高桥塔大体积混凝土水化热温度控制、超高桥塔新型液压爬模系统开发等,已成为影响深水大跨桥梁安全顺利施工、长期可靠运营的关键问题。为促进深水大跨桥梁施工技术的发展,提高深水大跨桥梁施工人员解决相关问题的能力,为深水大跨桥梁的推广提供技术支持,围绕深水大跨桥梁施工面临的上述关键问题,对2020年国内外研究者的相关研究进展及成果进行了分析与汇总。

With the increasement of economic strength and significant improvement in science and technology,bridge engineering is developing rapidly towards larger span,deeper foundation and higher tower.Many new problems appears to bridge builders,such as:accurate positioning of deep water foundation during floating and sinking,anti-erosion of super-large caisson foundation,large diameter drilled pier construction,optimization of anchoring structure in long-span cable-stayed bridge tower,temperature control of hydration heat for mass concrete of ultrahigh bridge tower,development of new hydraulic climbing template system for ultrahigh bridge tower.These are the key problems for safe and smooth construction and long-term reliable operation for deep-water long-span bridges.The development and achievements gained in 2020 related to those key problems are analyzed and summarized to improve the construction technology,the problem-solving capacity of the builders and to give technical support for the promotion of deep-water long-span bridges.