理论与试验研究

挤扩锚杆极限承载力计算及现场原型试验

  • 刘家明 ,
  • 王引生 ,
  • 聂希亦 ,
  • 彭浩然 ,
  • 牛文庆
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  • 1.广东省路桥建设发展有限公司二广分公司,广州 510623;
    2.中铁科学研究院有限公司,成都 610032;
    3.中国铁道科学研究院,北京 100081;
    4.中铁西北科学研究院有限公司,兰州 730000
刘家明(1976—),男,沈阳人,高级工程师,主要从事岩土工程领域研究工作。E-mail:37827393@qq.com

收稿日期: 2025-04-10

  网络出版日期: 2026-03-03

基金资助

广东省交通集团有限公司科技项目(JT2020YB12);中国中铁股份有限公司科技研究开发计划项目(2022-重大专项-07);中铁西北科学研究院有限公司重点课题(2023XBK02)

Calculation of Ultimate Load Capacity of Extruded and Expanded Anchor and Field Prototype Tests

  • Liu Jiaming ,
  • Wang Yinsheng ,
  • Nie Xiyi ,
  • Peng Haoran ,
  • Niu Wenqing
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  • 1. Erguang Branch, Guangdong Road and Bridge Construction Development Co., Ltd., Guangzhou 510623, P. R. China;
    2. China Railway Scientific Research Institute Co., Ltd., Chengdu 610032, P. R. China;
    3. China Railway Scientific Research Institute, Beijing 100081, P. R. China;
    4. China Railway Northwest Scientific Research Institute Co., Ltd., Lanzhou 730000, P. R. China

Received date: 2025-04-10

  Online published: 2026-03-03

摘要

本研究旨在探究挤扩锚杆在软弱地层中的极限承载力,以期解决传统锚固技术在此类地层中承载力不足的问题。通过理论分析与现场试验,提供了挤扩锚杆设计和应用的科学依据,以期增强边坡加固和基坑支护的安全性和可靠性。采用滑移线理论和有效长度原理推导出挤扩单盘和多盘锚杆的极限承载力计算公式并在广东高速公路某路堤边坡进行现场原位拉拔试验验证。现场试验结果显示,单盘锚杆的极限承载力为普通锚杆的1.42倍,双盘锚杆为1.68倍,并对比理论计算结果与现场试验结果基本一致,预应力损失试验得出锁定前建议对单盘锚杆将张拉力度提高到设计张拉力的140%,对双盘锚杆将张拉力度提高到设计张拉力的120%。挤扩锚杆通过增加盘端和侧摩阻力显著提高了锚固体系的承载能力,在软弱地层中的表现优于传统锚杆。

本文引用格式

刘家明 , 王引生 , 聂希亦 , 彭浩然 , 牛文庆 . 挤扩锚杆极限承载力计算及现场原型试验[J]. 地下空间与工程学报, 2026 , 22(1) : 201 -209 . DOI: 10.20174/j.JUSE.2026.01.21

Abstract

This study aims to explore the ultimate bearing capacity of expanded anchors in weak strata, with the goal of addressing the issue of insufficient bearing capacity in traditional anchoring techniques in such strata. Through theoretical analysis and field testing, this paper provides a scientific basis for the design and application of expanded anchors, with the expectation of enhancing the safety and reliability of slope reinforcement and excavation support. Using slip line theory and the effective length principle, formulas for calculating the ultimate bearing capacity of single and multiple expanded anchors were derived and validated through on-site pull-out tests conducted on an embankment slope of a highway in Guangdong. The field test results showed that the ultimate bearing capacity of single-plate anchors was 1.42 times that of ordinary anchors, while that of double-plate anchors was 1.68 times. The comparison between theoretical calculations and field test results was generally consistent, and pre-stress loss tests suggested increasing the tension force of single-plate anchors to 140% of the design tension force before locking, and for double-plate anchors, increasing it to 120% of the design tension force. Expanded anchors significantly improved the bearing capacity of the anchoring system by increasing end-plate and side friction resistance, performing better in weak strata compared to traditional anchors.

参考文献

[1] 夏凯, 张明礼, 张鑫, 等.拉压段长度变化对复合锚杆锚固性能影响研究[J]. 地下空间与工程学报, 2024, 20(1): 152-161, 180. (Xia Kai, Zhang Mingli, Zhang Xin, et al. Study on the effect of change in length of tension section on anchorage performance of composite anchors[J]. Chinese Journal of Underground Space and Engineering, 2024, 20(1): 152-161, 180. (in Chinese))
[2] 刘曙光, 黄泽信, 张洪. 不同锚固角加锚无摩擦节理面剪切试验研究[J]. 地下空间与工程学报, 2022, 18(3): 824-831. (Liu Shuguang, Huang Zexin, Zhang Hong. Experimental study on the shear of frictionless joint surface with anchoring at different anchorage angles[J]. Chinese Journal of Underground Space and Engineering, 2022, 18(3): 824-831. (in Chinese))
[3] 张科, 狄巍, 张凯. 顺层岩质滑坡形成机制试验研究[J]. 岩石力学与工程学报, 2024, 43(增1): 3354-3362. (Zhang Ke, Di Wei, Zhang Kai. Experimental study on the formation mechanism of bedding rock landslide [J]. Chinese Journal of Rock Mechanics and Engineering, 2024, 43(Supp. 1): 3354-3362. (in Chinese))
[4] 陈泓蓉, 龙建辉, 张吉宁, 等. 基于NPR锚索监测的顺层岩质边坡多阶变形规律研究[J]. 岩石力学与工程学报, 2024, 43(7): 1763-1774. (Chen Hongrong, Long Jianhui, Zhang Jining, et al. Study on the multi-stage deformation law of bedding rock slope based on NPR anchor cable monitoring[J]. Chinese Journal of Rock Mechanics and Engineering, 2024, 43(7): 1763-1774. (in Chinese))
[5] 简文彬, 黄聪惠, 罗阳华, 等. 降雨入渗下非饱和坡残积土湿润锋运移试验研究[J]. 岩土力学, 2020, 41(4): 1123-1133. (Jian Wenbin, Huang Conghui, Luo Yanghua, et al. Experimental study of wetting front transport in unsaturated slope residual soil under rainfall infiltration[J]. Geotechnics, 2020, 41(4): 1123-1133. (in Chinese))
[6] Guo G, Liu Z, Tang A, et al. Model test research on bearing mechanism of underreamed ground anchor in sand[J]. Mathematical Problems in Engineering, 2018, 2018: 9746438.
[7] 李全贵, 凌发平, 胡千庭, 等. 煤系地层弹性波阶段性衰减特性分析[J]. 中国矿业大学学报, 2023, 52(3): 466-477. (Li Quangui, Ling Faping, Hu Qianting, et al. Characterization of the phase attenuation of elastic waves in coal strata[J]. Journal of China University of Mining and Technology, 2023, 52(3): 466-477. (in Chinese))
[8] 朱赛楠, 魏英娟, 王平, 等. 大型单斜层状基岩滑坡变形特征与失稳机制研究—以重庆石柱县龙井滑坡为例[J]. 岩石力学与工程学报, 2021, 40(4): 739-750. (Zhu Sainan, Wei Yingjuan, Wang Ping, et al. Characteristics of deformation and destabilization mechanism of large-scale monoclinic bedrock landslides-an example of Longjing landslide in Shizhu County, Chongqing [J]. Chinese Journal of Rock Mechanics and Engineering, 2021, 40(4): 739-750. (in Chinese))
[9] 张季如, 郑颜军, 彭伟珂, 等. 填土应力路径下珊瑚砂幂律应力—应变模型的适用性研究[J]. 岩土力学, 2023, 44(5): 1309-1318. (Zhang Jiru, Zheng Yanjun, Peng Weike, et al. Applicability of power-law stress-strain model for coral sand under fill stress path [J]. Geotechnics, 2023, 44(5): 1309-1318. (in Chinese))
[10] 杨坚, 简文彬, 黄炜, 等. 注浆支盘式锚杆拉拔试验及极限承载力计算[J]. 岩土力学, 2021, 42(4): 1126-1132. (Yang Jian, Jian Wenbin, Huang Wei, et al. Pullout test and ultimate bearing capacity calculation of grouted support disk anchor[J]. Geotechnics, 2021, 42(4): 1126-1132. (in Chinese))
[11] 黄炜, 简文彬, 杨坚, 等. 多支盘锚杆的原型试验与荷载传递特征分析[J]. 岩土力学, 2023, 44(2): 520-530. (Huang Wei, Jian Wenbin, Yang Jian, et al. Prototype tests and load transfer characterization of multibranch disk anchors[J]. Geotechnical Mechanics, 2023, 44(2): 520-530. (in Chinese))
[12] 杨坚, 简文彬, 黄炜, 等. 注浆支盘式锚杆拉拔试验及极限承载力计算[J]. 岩土力学, 2021, 42(4): 1126-1132. (Yang Jian, Jian Wenbin, Huang Wei, et al. Pullout test and ultimate bearing capacity calculation of grouted anchor[J]. Geotechnics, 2021, 42(4): 1126-1132. (in Chinese))
[13] 俞强山, 王建松, 刘庆元, 等. 强风化花岗岩边坡锚索长期预应力损失规律及预测模型[J]. 铁道建筑, 2019, 59(7): 93-96. (Yu Qiangshan, Wang Jiansong, Liu Qingyuan, et al. Long-term prestress loss law and prediction model of anchor cables in strongly weathered granite slopes[J]. Railway Construction, 2019, 59(7): 93-96. (in Chinese))
[14] 陈昌富, 刘俊斌, 徐优林, 等. 锚-土界面剪切蠕变试验及其经验模型研究[J]. 岩土工程学报, 2016, 38(10): 1762-1768. (Chen Changfu, Liu Junbin, Xu Youlin, et al. Anchor-soil interface shear creep test and its empirical modeling[J]. Journal of Geotechnical Engineering, 2016, 38(10): 1762-1768. (in Chinese))
[15] 张敬一. 膨胀土地区承压扩体锚杆现场试验及应用研究[J]. 岩石力学与工程学报, 2018, 37(增2): 4367-4374. (Zhang Jingyi. Field test and application research of pressurized expanded body anchors in expansive soil area[J]. Chinese Journal of Rock Mechanics and Engineering, 2018, 37(Supp. 2): 4367-4374. (in Chinese))
[16] 聂希亦, 王引生, 廖小平. 新型挤扩锚杆现场力学试验与轴力分布分析[J]. 铁道标准设计, 2025, 69(11): 81-89. (Nie Xiyi, Wang Yinsheng, Liao Xiaoping. Field mechanical tests and axial force distribution analysis of new type of expanding and extruding anchor rods [J]. Railway Standard Design, 2025, 69(11): 81-89. (in Chinese))
[17] 钱永梅. 挤扩多盘桩的桩土效应及土体极限承载力研究[D]. 吉林: 吉林大学, 2002. (Qian Yongmei. Study on pile-soil interaction and ultimate bearing capacity of soil for expanding multi-plate piles[D]. Jilin: Jilin University, 2002. (in Chinese))
[18] 钱永梅, 尹新生, 钟春玲, 等. 挤扩多盘桩的土体极限承载力研究[J]. 哈尔滨工业大学学报, 2005(4): 568-570. (Qian Yongmei, Yin Xinsheng, Zhong Chunling, et al. Study on the ultimate bearing capacity of soil for expanding multi-plate piles[J]. Journal of Harbin Institute of Technology, 2005(4): 568-570. (in Chinese))
[19] 李春宝. 涡压挤扩桩承载特性研究[D]. 青岛:中国石油大学(华东), 2016. (Li Chunbao. Study on the bearing characteristics of swirled and expanded piles[D]. Qingdao: China University of Petroleum (East China), 2016. (in Chinese))
[20] 彭浩然. 挤扩锚杆施工工艺及抗拔承载特性研究[D]. 北京:中国铁道科学研究院, 2022. (Peng Haoran. Study on construction technology and uplift bearing characteristics of expanding and extruding anchor rods[D]. Beijing: China Academy of Railway Sciences, 2022. (in Chinese))
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