辽宁工程技术大学学报（自然科学版）2025，Vol.44Issue(2)：175-185,11.DOI:10.11956/j.issn.1008-0562.20240113
深埋隧洞中黏结型锚固系统的黏结性能研究
Study of the bonding performance of bonded anchorage systems in deep-buried tunnels
摘要
Abstract
In order to investigate the bonding performance of bonded anchorage systems in deep-buried tunnels and ensure the safety during the excavation of deep tunnels,this study takes the high-stress conditions of the No.2 diversion deep-buried tunnel at Jinping Second Hydropower Station as a research background.The bonding performance during tunnel excavation and anchor pull-out processes was studied by combining numerical simulation,experiment and monitoring.The study analyzed the variation patterns of stress states in surrounding rock at different depths.Based on the stress conditions obtained,a physical model of the anchorage system was constructed to analyze the load-displacement evolution characteristics at the interface between the anchor rod and grouting body during the pull-out process.The research results show that after excavation,the stress of the surrounding rock is redistributed,with the confining pressure generally increasing with depth,and the inhomogeneity and local instability of the surrounding rock stress occurring.As the resistance of surrounding rock increases,the peak shear stress of the bonded anchors rises.After reaching the peak value,the shear stress decreases more rapidly.The force process of the anchor can be categorized into three phases:the elastic phase,the plastic softening phase,and the complete sliding phase,culminating in complete failure.When the diameter difference between the anchor rod and grouting body is about 6～9 mm,the bonding performance is optimal.The model precision was confirmed through the integration of lab testing and on-site monitoring data.This study can provide a reference for the application of bonded anchors in deep-buried tunnels and other underground engineering projects.关键词
锚固系统/围岩/剪切应力/直径差/黏结性能/深埋隧洞Key words
anchor system/surrounding rock/shear stress/diameter difference/bonding performance/deep-buried tunnel分类
交通运输引用本文复制引用
夏洪春,严滑钧,朱训国,张传庆,郭利军,薛子钎..深埋隧洞中黏结型锚固系统的黏结性能研究[J].辽宁工程技术大学学报（自然科学版）,2025,44(2):175-185,11.基金项目
国家自然科学基金项目(52279116) （52279116）
辽宁省复杂结构灾害预测与防治重点实验室平台重点项目(202101ZD02) （202101ZD02）
