G341线辘辘坝至白银段公路靖远东湾黄河特大桥结构设计和关键技术

徐升桥; 黄太平; 尹春燕; 王福聪; 邹永伟; 常亚辉

doi:10.13238/j.issn.1004-2954.202509250001

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G341线辘辘坝至白银段公路靖远东湾黄河特大桥结构设计和关键技术

本刊特稿 | 更新时间：2026-01-20

- G341线辘辘坝至白银段公路靖远东湾黄河特大桥结构设计和关键技术
- Structural Design and Key Technologies of Jingyuan Dongwan Yellow River Super Large Bridge on G341 Highway Luluba-Baiyin Section
- 铁道标准设计 2026年70卷第1期页码：1-8
- 作者机构：
  
  中铁工程设计咨询集团有限公司,北京 100055
  中国中铁桥梁专业研发中心桥梁标准化设计研究分中心,北京 100055
  中铁城市发展投资集团有限公司,成都 610218
- 作者简介：
  
  徐升桥（1966—），男，正高级工程师，全国工程勘察设计大师，1991年毕业于长沙铁道学院桥梁工程专业，工学硕士，主要从事桥梁前沿技术研究工作，E-mail:cecql xsq@qq. com。
  尹春燕（1982—），男，高级工程师，2006年毕业于华中科技大学结构工程专业，工学硕士，主要从事桥梁设计研究工作，Email:5632209@qq. com。
- 基金信息：
  
  中铁工程设计咨询集团有限公司科研重点课题(KY2024A012);中铁城市发展投资集团有限公司科技创新项目(中铁城投研合2025-02)
- DOI：10.13238/j.issn.1004-2954.202509250001
  中图分类号： U442.54;U448.27
- 收稿：2025-09-25，
  
  修回：2025-10-31，
  
  纸质出版：2026-01-20
- 稿件说明：
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徐升桥, 黄太平, 尹春燕, 等. G341线辘辘坝至白银段公路靖远东湾黄河特大桥结构设计和关键技术[J]. 铁道标准设计, 2026,70(1):1-8.

XU Shengqiao, HUANG Taiping, YIN Chunyan, et al. Structural Design and Key Technologies of Jingyuan Dongwan Yellow River Super Large Bridge on G341 Highway Luluba-Baiyin Section[J]. Railway Standard Design, 2026, 70(1): 1-8.
徐升桥, 黄太平, 尹春燕, 等. G341线辘辘坝至白银段公路靖远东湾黄河特大桥结构设计和关键技术[J]. 铁道标准设计, 2026,70(1):1-8. DOI： 10.13238/j.issn.1004-2954.202509250001.

XU Shengqiao, HUANG Taiping, YIN Chunyan, et al. Structural Design and Key Technologies of Jingyuan Dongwan Yellow River Super Large Bridge on G341 Highway Luluba-Baiyin Section[J]. Railway Standard Design, 2026, 70(1): 1-8. DOI： 10.13238/j.issn.1004-2954.202509250001.

摘要

G341线辘白公路靖远东湾黄河特大桥主桥采用（85+2×148+85）m钢桁加劲连续梁，钢桁架设计为支点高、跨中低曲线形式。针对桥位低温大温差、高烈度震区且强风复杂环境，明确结构合理形式、设计参数及内力控制技术，解决桥梁抗震、抗风及抗裂下挠核心问题。通过有限元建模、风洞试验等多种分析方法，进行静动力计算、抗震与抗风性能分析、结构选型及关键技术攻关。研究结果表明：设置钢桁加劲后，主梁在恒载作用下弯矩显著降低，中支点弯矩减少超过46%，中跨挠度降低约33%，结构刚度提高明显；通过对钢桁架施加对拉力，可进一步优化主梁内力分布，改善其受力状态。钢桁架屈曲稳定系数为9.5，表现出良好稳定性。动力分析显示结构具有良好抗震性能，E2地震作用下桥墩强度与剪力均满足规范要求。风洞试验证实，单榀钢桁架具有较高颤振临界风速和抗疲劳性能，满足抗风设计要求。与常规连续梁方案相比，钢桁加劲连续梁在技术性能、经济性和全寿命维护方面均表现出显著优势，特别适用于高烈度震区、大跨径及重载交通场景。研究形成结构设计方法与内力控制技术，为复杂环境下公路桥梁设计提供技术参考，推动钢桁加劲组合结构在公路工程领域应用与发展。

Abstract

The main bridge of the Jingyuan Dongwan Yellow River Super Large Bridge on the G341 Highway Luluba-Baiyin Section is an ( 85+2×148+85) m steel truss-stiffened continuous girder. The steel truss was designed in a curved shape with a higher depth at the supports and a lower depth at the mid-span. To address the complex environmental conditions at the bridge site

including low temperatures with large temperature variations

high seismic intensity

and strong winds

this study aims to determine the reasonable structural form

design parameters

and internal force control techniques

thereby resolving the core issues of seismic resistance

wind resistance

and crack-resistant deflection control. Using multiple analytical methods

including finite element modeling and wind tunnel tests

static and dynamic calculations

seismic and wind resistance performance analyses

structural selection

and investigations of key technologies were conducted. The results showed that after applying steel truss stiffening

the bending moment in the main girder under dead load significantly decreased: the bending moment at the intermediate support was reduced by over 46%

and the mid-span deflection was reduced by approximately 33%

indicating a notable improvement in structural stiffness. Applying tensile forces to the steel truss further optimized the internal force distribution of the main girder and improved its stress condition. The buckling stability coefficient of the steel truss was 9.5

demonstrating good stability. Dynamic analysis showed that the structure exhibited good seismic performance

and the pier strength and shear capacity under the E2 earthquake satisfied the code requirements. Wind tunnel tests confirmed that the single steel truss plane had a high flutter-critical wind speed and good fatigue resistance

meeting the wind-resistance design requirements. Compared with conventional continuous girder schemes

the steel truss-stiffened continuous girder exhibited significant advantages in technical performance

economic efficiency

and life-cycle maintenance

and was particularly suitable for application in high seismic intensity zones

long-span scenarios

and under heavy traffic loads. The structural design method and internal force control technique developed in this study provide a technical reference for highway bridge design in complex environments and promote the application and development of steel truss-stiffened composite structures in highway engineering.

关键词

Keywords

references

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