摘要
多支盘锚杆是新近研发的新型锚杆,具有抗拔承载力高、鲁棒性强和灵活性强等优点。为了进一步掌握多支盘锚杆的抗拔承载性能,本文在多支盘锚杆室内模型试验研究基础上,开展了现场边坡锚固原型试验。结果表明,相较于普通锚杆,单支盘锚杆盘径从300 mm增大到500 mm时,抗拔承载力分别提高35.7%、50%、71.4%,变形控制能力也相应增强;在粉质黏土中,双支盘锚杆可以到达更大的抗拔承载力,支盘间距≥4倍支盘直径时更能充分发挥两个支盘的协同作用;随着支盘个数从1个增多到3个,多支盘锚杆锁紧的地层范围越大,多支盘锚杆的抗拔承载力及变形控制能力也相应增强;多支盘锚杆的荷载-位移关系符合双曲线模型,可以用于预测多支盘锚杆的承载力。研究成果可以为多支盘锚杆的工程应用奠定了较良好的理论基础。
The multi-disk anchor is a newly developed anchor,which has the advantages of high uplift capacity,strong robustness and flexibility.Based on the indoor model test of the multi-disk anchor to further grasp the pull-out bearing performance,an on-site slope anchoring prototype test was carried out.The test results show that as the disk diameter increases from 300 mm to 500 mm,the pull-out bearing capacity of the single-support disk anchor is increased by 35.7%,50%,and 71.4%,respectively,compared with the ordinary anchor,and the deformation control is also enhanced accordingly.In the silty clay,the double-supported anchor bolt with the spacing between the support disks is greater than or equal to 4 times the diameter of the support disk,which can give more synergistic effect of the two support disks and accordingly,achieve greater uplift bearing capacity.With the support disks increased from 1 to 3,and the locked strata are is also increased,with greater pull-out bearing capacity and deformation control ability.The load-displacement relationship of the multi-disk anchor may be represented as in a hyperbolic model and used as to predict the bearing capacity.These results provide a good theoretical foundation for the engineering application of multi-branched anchors.
作者
黄炜
简文彬
杨坚
豆红强
罗金妹
HUANG Wei;JIAN Wenbin;YANG Jian;DOU Hongqiang;LUO Jinmei(Institute of Geology and Geophysics,Fuzhou University,Fuzhou 350108,China;Fujian Key Laboratory of Geohazard Prevention,Fuzhou 350108,China;Fujian Geological Exploration Institute of Geology and Mine Bureau,Fuzhou 350013,China)
出处
《工程地质学报》
北大核心
2025年第2期772-782,共11页
Journal of Engineering Geology
基金
国家自然科学基金项目(资助号:41861134011)
中化地质矿山总局科技创新团队基金项目(资助号:201806291)。
关键词
多支盘锚杆
极限承载力
拉拔试验
双曲线模型
原型试验
Multiple disc anchors
Ultimate bearing capacity
Pull-out tests
Hyperbolic model
Prototype test
作者简介
第一作者:黄炜(1997-),男,硕士生,主要从事边坡工程方向研究.E-mail:1062700713@qq.com;通讯作者:简文彬(1963-),男,博士,教授,博士生导师,主要从事岩土工程与工程地质研究.E-mail:jwb@fzu.edu.cn。
