软弱岩土体中预应力锚索弯曲锚固段剪应力分析

doi:10.3969/j.issn.1674-0696.2022.01.13

重庆交通大学学报（自然科学版） ›› 2022, Vol. 41 ›› Issue (01): 91-95.DOI: 10.3969/j.issn.1674-0696.2022.01.13

• 交通基础设施工程 • 上一篇

软弱岩土体中预应力锚索弯曲锚固段剪应力分析

叶红1,2，李艳1,2

(1. 武汉理工大学土木工程与建筑学院，湖北武汉 430070； 2. 武汉交通职业学院交通工程学院，湖北武汉 430065)

收稿日期:2009-11-30 修回日期:2021-06-01 发布日期:2022-01-20
作者简介:叶红(1977—)，男，湖北嘉鱼人，教授，博士，主要从事岩土工程加固方面理论和数值模拟的研究。E-mail：381379860@qq.com
基金资助:
国家自然科学基金项目(51374163)；湖北省教育厅科学技术研究计划指导性项目(B2021520)

Shear Stress Analysis of Bending Anchorage Section of Prestressed Anchor Cable in Soft Rock and Soil

YE Hong1,2, LI Yan1,2

(1. School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, Hubei, China; 2. School of Transportation Engineering, Wuhan Technical College of Communications, Wuhan 430065, Hubei, China)

Received:2009-11-30 Revised:2021-06-01 Published:2022-01-20

摘要/Abstract

摘要： 为了更加精确地研究软弱岩土体中预应力锚索的锚固机理，基于锚索预应力与软弱岩土体蠕变之间的耦合效应关系，结合Boussinesq-Flamant问题解和任意点的平面应力状态分析，推导了锚索弯曲锚固段内、外曲线上任意点切向剪应力的理论解；进行了算例分析。结果表明：锚索弯曲锚固段内、外曲线上切向剪应力分布曲线及剪应力峰值均与预应力初始值F0成正相关关系，与锚索孔道弯曲半径R成负相关关系；锚索弯曲锚固段内曲线的切向剪应力峰值比外曲线的大，且主要集中在锚固段0.5 m范围内。研究结果补充完善了软弱岩土体中预应力锚索的锚固机理。

关键词: 岩土工程；道路工程；预应力锚索；耦合效应；孔道弯曲；锚固机理

Abstract: In order to study the anchorage mechanism of prestressed cable in soft rock and soil more accurately, the theoretical solution of the tangential shear stress at any point on the inner and outer curves of the bending anchorage section of the anchor cable were derived, which was based on the coupling effect between prestressing force of anchor cable and creep of soft rock and soil as well as combined with Boussinesq-Flamant solution and the plane stress state analysis of any point. A case study was carried out. The results show that the peak value of tangential shear stress on the inner and outer curves of the bending anchorage section of the anchor cable is positively correlated with the initial prestress F0 and negatively correlated with the bending radius R of anchorage segment. And the peak value of tangential shear stress of the inner curve in the bending anchorage section of the anchor cable is larger than that of the outer curve, and is mainly concentrated within 0.5m of the anchorage section. The research results complement and perfect the anchorage mechanism of prestressed cable in soft rock and soil.

Key words: geotechnical engineering; highway engineering; prestressed cable; coupling effect; borehole deviation; anchorage mechanism

中图分类号:

TU457
U416.1

叶红1,2，李艳1,2. 软弱岩土体中预应力锚索弯曲锚固段剪应力分析[J]. 重庆交通大学学报（自然科学版）, 2022, 41(01): 91-95.

YE Hong1,2, LI Yan1,2. Shear Stress Analysis of Bending Anchorage Section of Prestressed Anchor Cable in Soft Rock and Soil[J]. Journal of Chongqing Jiaotong University(Natural Science), 2022, 41(01): 91-95.

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软弱岩土体中预应力锚索弯曲锚固段剪应力分析

Shear Stress Analysis of Bending Anchorage Section of Prestressed Anchor Cable in Soft Rock and Soil

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