土工基础

土工基础 ›› 2020, Vol. 34 ›› Issue (2): 109-113.

• 工程实录 • 上一篇    下一篇

绿汁江大桥B4桥位玉溪岸开挖方案比选研究

蒋文鹏1，张 斌1，邢尔文1，陆 特1，鲁志强2，尹小涛3   

  1. （1.云南大永高速公路有限公司，云南大理 671000；2.云南省交通规划设计研究院有限公司，昆明 650041；
    3.中国科学院武汉岩土力学研究所岩土力学与工程国家重点试验室，武汉 430071）
  • 收稿日期:2019-07-04 修回日期:2019-07-10 出版日期:2020-05-20 发布日期:2020-05-20
  • 作者简介:蒋文鹏（1989-），男，助理工程师，研究方向为高速公路建设管理。
  • 基金资助:
    云南省交通运输厅项目（云交科教［2017］23号）；交通运输部科技示范项目（编号：2017-09）。

B4 Abutment Site Excavation Plan for the Lvzhijiang River Crossing Bridge

JIANG Wenpeng1, ZHANG Bin1, XING Erwen1, LU Te1, LU Zhiqiang2, YIN Xiaotao3   

  1. (1.Yunnan Dayong Expressway Co.Ltd,Dali 671000;
    2.Broadvision Engineering Consultants, Kunming 650041;
    3.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071)
  • Received:2019-07-04 Revised:2019-07-10 Online:2020-05-20 Published:2020-05-20

摘要： 桥梁及其附属建构筑物的建设不可避免地对桥址自然地形进行开挖扰动，合适的开挖加固方案显得尤为重要。以玉楚高速公路绿汁江大桥B4桥位玉溪岸边坡为研究对象，在现场调查和勘察的基础上，确定了玉溪岸桥址岸坡稳定性的主要控制因素，采用极限平衡法分析了不同开挖方案下的隧道施工平台上下边坡、索塔下边坡的工程稳定性，对各部分边坡提出安全经济的加固措施。最后依据各方案的开挖方量和加固措施费效比，推荐了小开挖方案作为玉溪岸桥址岸坡最优方案，为类似工程的开挖加固提供参考。

关键词: 绿汁江大桥, 桥址岸坡, 开挖, 加固, 极限平衡

Abstract: The excavation reinforcement is frequently required for the construction of the bridge structure and its ancillary structure such as, bridge foundations, tower foundations and anchorage blocks. Therefore, selecting the appropriate excavation and reinforcement system is particularly important. This paper presents the excavation plan for the B4 bridge abutment site at the left bank of Yuxi River. The proposed B4 bridge is for the YuChu Expressway at the Lvzhijiang river crossing. Factors that affecting the stability of the bridge abutment at the left bank were evaluated through the geological survey and subsurface investigations. The stability issues of slopes below and above the proposed tunnel construction trestle and slopes below the cable stay tower were analyzed by using limit equilibrium method. The slope stability mitigation and reinforcement measures at various locations are proposed with comprehensive cost comparations. The optimized excavation plan with balanced excavation volume and cost was proposed.

Key words: lvzhijiang river crossing bridge, bridge abutment slope, excavation plan, slope reinforcement, limit equilibrium

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