岩土力学2017，Vol.38Issue(8)：2279-2285,7.DOI:10.16285/j.rsm.2017.08.016
锚固方式对节理岩体剪切性能影响试验研究
Experimental study on shear behavior of jointed rock mass with anchorage mode
摘要
Abstract
In this study,precast concrete blocks,#45 steel screw,mine chemical grout were used to simulate the surrounding rock and bolt.Shear tests of bolted jointed rock specimens were carried out to study characteristics of jointed shear stress and the cable deformation under three conditions of no-anchored,end-anchored and full-anchored specimens.The results show that obvious differences were found in curves of shear-jointed rock displacement with various anchoring ways.The no-anchor specimen was characterized as brittle.For the end-anchored specimen,a turning point was found in the slightly decreased shear when adjusting the shear strength of anchor.Compared with the above two specimens,the best matching was achieved by the full-anchored specimen with the joint,which indicates that the bolted specimen could bear the greatest shear force.For both the end-anchored bolt and the full-anchor bolt,their deformation characteristics can be divided into the tensile zone,shear-tension zone and compression zone.Under the combined action of shear and tension,the failure of the anchored bolt occurred in the shear-tension zone.With different anchorage modes,the distribution of axial force varied as well during the shear test.The axial force of full-anchored bolt was mainly distributed in the vicinity of the joint.Moreover,it decreased rapidly with the increase of the joint distance.While the distribution of axial force was relatively uniform in the end-anchored bolt.关键词
隧道工程/锚固方式/剪切试验/节理岩体/破坏形式Key words
tunnel engineering/anchorage mode/shear test/jointed rock mass/failure mode分类
建筑与水利引用本文复制引用
腾俊洋,张宇宁,唐建新,张闯,李臣林..锚固方式对节理岩体剪切性能影响试验研究[J].岩土力学,2017,38(8):2279-2285,7.基金项目
煤矿灾害动力学与控制国家重点实验室自主课题重点项目(No.2011DA105287-ZD201504).This work was supported by Scientific Research Foundation of State Key Lab.of Coal Mine Disaster Dynamics and Control (2011DA105287-ZD201504). （No.2011DA105287-ZD201504）
