岩土力学2026，Vol.47Issue(2)：581-594,606,15.DOI:10.16285/j.rsm.2025.0138
软岩刚度条件下锚固系统受拉力学响应及破坏机制研究
Mechanical responses and failure mechanisms of anchorage systems under pullout load in soft rock stiffness conditions
摘要
Abstract
The pullout performance of the anchorage system is a key indicator for assessing the effectiveness of rock mass reinforcement.However,existing pullout tests,though widely used,fail to accurately simulate the stiffness of the actual rock mass,reveal the radial mechanical response,and analyze failure modes.To address these issues,this study designed a combination of aluminum sleeves and rock to simulate a soft rock environment and conducted pullout tests on the anchorage system under the stiffness conditions of a soft rock environment.Results indicate two dominant failure modes in a soft-rock environment:rock-splitting failure and unsplit failure,with the corresponding pullout curves showing post-peak sharp drop and post-peak gradual drop,respectively.A significant correlation exists between radial stress and failure mode:peak radial stress ranges from 4 MPa to 10 MPa for rock-splitting failure and 2 MPa to 4 MPa for unsplit failure.Moreover,the anchorage length has the most significant impact on the peak load,while the anchorage length and grout strength are the main factors affecting the failure mode of the anchorage system.关键词
软岩/锚固系统/围岩刚度/破坏特征/力学响应Key words
soft rock/anchorage system/surrounding rock stiffness/failure characteristics/mechanical response分类
建筑与水利引用本文复制引用
张强强,张传庆,崔强,向天兵,王超,叶金萍,朱训国..软岩刚度条件下锚固系统受拉力学响应及破坏机制研究[J].岩土力学,2026,47(2):581-594,606,15.基金项目
国家自然科学基金(No.52279116).This work was supported by the National Natural Science Foundation of China(52279116). （No.52279116）
