岩土力学2018，Vol.39Issue(4)：1263-1270,1280,9.DOI:10.16285/j.rsm.2017.1415
不同围岩条件下锚杆肋间距与锚固力优化研究
Optimisation of bolt rib spacing and anchoring force under different conditions of surrounding rock
摘要
Abstract
This study investigated the relationship between bolt rib spacing and anchorage performance under different conditions of surrounding rock.Based on the thick-walled cylinder theory,pull-out tests were carried out on sinistral rebar bolt specimens with the spacing of 12,24,36,and 48 mm,which were anchored in the steel sleeves with wall thicknesses of 4.5 and 6.0 mm,respectively,Results of the drawing force,the displacement of drawing force more than 100 kN,the circumferential strain of the sleeves and energy dissipation were obtained.Experimental results show that the displacement of drawing force more than 100 kN,the circumferential strain and the energy dissipation value of the sleeve increase with increasing the rib spacing in different sleeves (different surrounding rock conditions),respectively.The pulling force of anchor rod is found to be the highest when the rib spacing is 24 mm.While with the same rib spacing,the stronger the surrounding rock is,the larger the pulling force is.The circumferential strain of the sleeve with a 4.5 mm thick wall is larger than that of 6.0 mm,which indicates that the effect of surrounding rock is significant on the deformation ability of bolts.Moreover,the anchorage performance can be improved by increasing the rib spacing under different surrounding rock conditions.关键词
厚壁理论/拉拔试验/螺纹钢锚杆/肋间距/锚固性能Key words
thick-walled cylinder theory/pull-out test/sinistral rebar bolt/rib spacing/anchorage performance分类
信息技术与安全科学引用本文复制引用
赵象卓,张宏伟,CAO Chen,张明,张怀东,韩军..不同围岩条件下锚杆肋间距与锚固力优化研究[J].岩土力学,2018,39(4):1263-1270,1280,9.基金项目
辽宁省煤炭资源安全开采与洁净利用工程研究中心开放基金资助项目 (No.LNTU15KF02).This work was supported by the Research Center of Coal Resources Safety Mining and Clean Utilization (LNTU15KF02). （No.LNTU15KF02）
