东南大学学报（自然科学版）2026，Vol.56Issue(9)：1263-1270,8.DOI:10.3969/j.issn.1001-0505.2026.09.004
基于椭球体破坏假设的砂土中扩大头锚杆极限抗拔承载力计算方法
Calculation of ultimate uplift capacity for underreamed anchors in sand with ellipsoidal failure model
摘要
Abstract
Based on the ellipsoidal failure hypothesis,a novel method for calculating the ultimate uplift capac-ity of underreamed anchors in sand was proposed,providing a theoretical basis for predicting their bearing ca-pacity.Firstly,by integrating the Mohr-Coulomb failure criterion and comprehensively considering soil param-eters,anchor geometric parameters,and inclination angle,the calculation formula for ultimate uplift capacity was derived.Secondly,the reliability of the method was validated using field test data from a hydrogen energy demonstration project in Yancheng and literature case studies.Finally,through case calculations and paramet-ric sensitivity analysis,the influence patterns of soil strength parameters(cohesion,internal friction angle),anchor dimensions,and installation inclination angle on the ultimate uplift capacity were investigated.The re-sults demonstrate that the soil cohesion and internal friction angle significantly affect the ultimate uplift capac-ity of underreamed anchors.The embedment depth ratio of the underreamed section should exceed 4.Verti-cally installed underreamed anchors achieve maximum uplift capacity,and inclination angles below 20° should be avoided for inclined installations.关键词
扩大头锚杆/极限抗拔承载力/椭球体破坏假设/锚杆倾角/埋深比/土体参数Key words
underreamed anchor/ultimate uplift capacity/ellipsoidal failure hypothesis/anchor inclination angle/embedment depth ratio/soil parameter分类
建筑与水利引用本文复制引用
戴国亮,项宇凡,柳鸿博..基于椭球体破坏假设的砂土中扩大头锚杆极限抗拔承载力计算方法[J].东南大学学报（自然科学版）,2026,56(9):1263-1270,8.基金项目
国家自然科学基金资助项目(52378328,52178317) （52378328,52178317）
东南大学南通海洋高等研究院基金重点资助项目(KP202404). （KP202404）
