AUTHOR=Gao Jiayun , Zhu Yan , Jiang Jie , Yin Sensen , Bi Jingchao , Shen Shuilong TITLE=Analysis of pullout bearing capacity of enlarged head anchors and soil failure modes using discrete element method JOURNAL=Frontiers in Earth Science VOLUME=Volume 13 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2025.1564712 DOI=10.3389/feart.2025.1564712 ISSN=2296-6463