[1]陈钰,张杰胜,王晓明*,等.轻型覆表式回转缆地锚极限承载力评估方法[J].长安大学学报(自然科学版),2026,46(01):142-152.[doi:10.19721/j.cnki.1671-8879.2026.01.011]
　CHEN Yu,ZHANG Jie-sheng,WANG Xiao-ming*,et al.Evaluation method for ultimate bearing capacity of lightweight covered rotary cable ground anchorage[J].Journal of Chang’an University (Natural Science Edition),2026,46(01):142-152.[doi:10.19721/j.cnki.1671-8879.2026.01.011]
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轻型覆表式回转缆地锚极限承载力评估方法()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第46卷
期数:
2026年01期
页码:
142-152
栏目:
桥梁与隧道工程
出版日期:
2026-01-31

文章信息/Info

Title:
Evaluation method for ultimate bearing capacity of lightweight covered rotary cable ground anchorage
文章编号:
1671-8879(2026)01-0142-11
作者:
陈钰1; 张杰胜2; 王晓明1*; 李波2; 吴润涵1; 李晨曦1
(1. 长安大学 桥梁工程研究所,陕西 西安 710064; 2. 中铁四局集团第一工程有限公司,安徽 合肥 230041)
Author(s):
CHEN Yu1;  ZHANG Jie-sheng2;  WANG Xiao-ming1*;  Li Bo2;  WU Run-han1;  LI Chen-xi1
(1. Institute of Bridge Engineering Chang'an University, Xi'an 710064, Shaanxi, China; 2. The First Engineering Co., Ltd. of CTCE Group, Hefei 230041, Anhui, China)
关键词:
桥梁工程;  轻型覆表式回转缆地锚;  有限元法;  失效模式;  极限承载能力
Keywords:
bridge engineering;  lightweight covered rotary cable ground anchorage;  finite element method;  failure mode;  ultimate bearing capacity
分类号:
U443.24
DOI:
10.19721/j.cnki.1671-8879.2026.01.011
文献标志码:
A
摘要:
为了提升轻型覆表式回转缆地锚锚碇(回转缆锚碇)的安全耐久性能,结合世界首座独塔单跨地锚式回转缆悬索桥工程,探究回转缆锚碇可能存在的失效模式及对应的极限承载力。回转缆锚碇无需承担主缆上拔力,可以明显缩小锚碇体积; 覆表式轻型化设计使得其在水平拉力下容易与基岩发生滑移,受地基初始应力的影响较大。基于回转缆锚碇的受力特征,识别回转缆锚碇的3种主要失效模式,包括回转缆锚碇基础齿坎开裂失效、锚碇-地基接触界面滑移失稳以及地基剪切破坏失效。基于现场地勘数据,建立考虑初始地应力干扰的回转缆锚碇-地基接触界面精细化模拟模型与回转缆锚碇极限承载能力评估框架。依托某独塔单跨回转缆悬索桥工程,建立全桥多尺度模型,利用现场实测数据验证回转缆锚碇模型的精度。研究结果表明:回转缆锚碇基础齿坎开裂失效为控制失效模式,其极限承载力仅为1.87倍设计荷载; 荷载为2倍设计荷载时,回转缆锚碇-地基接触面和回转缆锚碇前侧土体可能发生滑移; 荷载为2.5倍设计荷载时,地基塑性区迅速发展,可能导致剪切破坏; 建议通过优化齿坎的布置形式,提高锚碇与基岩之间摩擦因数或者降低锚碇对基岩承载力的需求,提升回转缆锚碇的使用寿命。
Abstract:
In order to improve the safety and durability performance of lightweight covered rotary cable ground anchorage(rotary cable anchorage), possible failure modes and corresponding ultimate bearing capacity of revolving cable anchorage were explored based on the world's first single tower single span revolving cable suspension bridge project. The rotary cable anchorage does not need to bear the pulling force of the main cable, which can significantly reduce the volume of the anchorage. However, the light overlay design makes it easier to slip with the bedrock under horizontal tension, and is greatly affected by the initial stress of the foundation. Based on the mechanical characteristics of the rotary cable anchorage, three main failure modes were identified, including the cracking failure of the tooth ridge of the rotary cable anchorage foundation, the sliding instability of the anchorage-foundation contact interface and the shear failure of the foundation. Based on the field geological survey data, a refined model for the contact interface between the anchorage and the foundation of the rotary cable considering the interference of the initial ground stress and the evaluation framework of the ultimate bearing capacity of the rotary cable anchorage were established. A multi-scale model of the entire bridge was established based on the engineering support, and the accuracy of the rotary cable anchorage model was verified using on-site measured data. The results show that the cracking failure of the tooth ridge of the rotary cable anchorage foundation is the control failure mode, and its ultimate bearing capacity is only 1.87 times of the design load. When the load reaches 2 times of the design load, slippage may occur at the contact surface of the rotary cable anchorage-foundation and the soil in front of the rotary cable anchorage. When the load is 2.5 times of the design load, the plastic zone of the foundation develops rapidly, which may lead to shear failure. Therefore, it is recommended to improve the service life of the rotary cable anchor by optimizing the arrangement of the tooth ridge, increasing the friction coefficient between the anchorage and the bedrock, or reducing the demand of the anchorage for the bearing capacity of the bedrock.2 tabs, 11 figs, 26 refs.

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备注/Memo

备注/Memo:
收稿日期:2025-07-01
基金项目:国家自然科学基金项目(52178104); 中央高校基本科研业务费专项资金项目(300102214901)
作者简介:陈 钰(1999-),女,山东淄博人,工学博士研究生,从事桥梁工程新型结构设计研究,E-mail:chenyu1999@chd.edu.cn。
通信作者:王晓明(1983-),男,山西朔州人,教授,博士研究生导师,工学博士,E-mail:wxm@chd.edu.cn。
更新日期/Last Update: 2026-02-20