惠肇东江特大桥主桥设计关键技术  

Key technologies in the design of the Huizhou-Zhaoqing Dongjiang grand bridge

作　　者：李保磊 邹建波 LI Baolei;ZOU Jianbo(Jiangsu Expressway Engineering Maintenance Technology Co.,Ltd.,Nanjing 211106,China;China Design Group Co.,Ltd.Nanjing 210014,China)

机构地区：[1]江苏高速公路工程养护技术有限公司,南京211106 [2]华设设计集团股份有限公司,南京210014

出　　处：《低温建筑技术》2024年第11期77-81,共5页Low Temperature Architecture Technology

摘　　要：为探究复杂建设环境下的特殊斜拉桥结构受力特性,解决设计难题。文中以东江特大桥为工程背景,通过边跨密索区梁段的特殊设计与全桥施工模拟分析,实现无辅助墩不对称全悬臂施工设计,有效保护了水源保护区和降低了水中高支架施工的风险。对比规范等效静力计算和数值动力模拟分析结果,验证了数值模拟的可靠性,得到防撞力和结构损伤情况,为结构设计提供依据。基于塔柱拉索锚固区精细化仿真分析结果,得到了锚固区受力分布特点,加强了结构设计。研究为同类建设环境下的工程设计提供参考。To explore the stress characteristics of special cable-stayed bridge structures in complex construction environments and address design challenges,this study uses the dongjiang grand bridge as a case study.By implementing a special design for the edge span's dense cable segment and simulating the entire bridge construction,an asymmetrical cantilever construction design without auxiliary piers was achieved.This effectively protected the water source protection area and reduced the risks associated with high support construction in water.The study compares the results of code-compliant equivalent static calculations with numerical dynamic simulations to verify the reliability of the numerical model.Insights into impact forces and structural damage were obtained,providing a basis for structural design.Based on refined simulation analysis results of the anchorage area of the tower-column cable,the stress distribution characteristics in the anchorage area were determined,leading to targeted enhancements in structural design.This research provides valuable references for engineering design in similar construction environments.

关 键 词：混凝土斜拉桥 全悬臂施工 墩柱防撞设计 塔柱拉索锚固 

分 类 号：TU318[建筑科学—结构工程]