借助CNKI和Web of ScienceTM数据库,利用文献计量学方法对近几十年来国内外发表的屋顶绿化文献进行了定量分析,综述了屋顶绿化研究的现状、前景和面临的挑战。通过构建CNKI总量和核心期刊2个数据库,发现屋顶绿化研究涵盖多个领域,呈现...借助CNKI和Web of ScienceTM数据库,利用文献计量学方法对近几十年来国内外发表的屋顶绿化文献进行了定量分析,综述了屋顶绿化研究的现状、前景和面临的挑战。通过构建CNKI总量和核心期刊2个数据库,发现屋顶绿化研究涵盖多个领域,呈现多学科参与的特点。2011年之前文献数量一直呈总体增加趋势,但最近2年则逐年减少。对SCI期刊数据库最近12年的文献检索发现,其年文献数量始终在增长,且研究重点逐步聚焦到生态与环境问题上,而不仅是屋顶本身。可为国内未来屋顶绿化的研究提供参考。展开更多
The anchoring eccentricity of the bolt and cable bolt is a common problem in geotechnical support engineering and affects the ability of the bolt and cable bolt to control the rock mass to a certain extent.This paper ...The anchoring eccentricity of the bolt and cable bolt is a common problem in geotechnical support engineering and affects the ability of the bolt and cable bolt to control the rock mass to a certain extent.This paper reports on numerical simulation and laboratory experiments conducted to clarify the effect of eccentricity on the anchoring quality of the bolt and cable bolt,and to establish an effective solution strategy.The results reveal that the anchoring eccentricity causes unbalanced stress distribution and the uncoordinated deformation of the resin layer,which results in higher stress and greater deformation of the resin layer at the near side of the rod body.Additionally,as the degree of anchoring eccentricity increases,the effect becomes more significant,and the resin layer of the anchoring system becomes more likely to undergo preferential failure locally,which weakens the load-bearing performance of the anchoring system.This paper develops an innovative bolt anchoring rectifying device(B-ARD)and cable bolt anchoring rectifying device(C-ARD)on the basis of the structural characteristics of the bolt and cable bolt to better ensure the anchoring effect of them.The working effects of these two devices were verified in detailed experiments and analysis.The experimental results show that the anchoring rectifying devices(ARD)improve and ensure the anchoring concentricity of the bolt and cable bolt,which will help improve the supporting performance of them.The paper provides a convenient and effective method for improving the anchoring concentricity of the bolt and cable bolt,and provides a concept and reference for technical research on improving the effect of roof bolting.展开更多
文摘借助CNKI和Web of ScienceTM数据库,利用文献计量学方法对近几十年来国内外发表的屋顶绿化文献进行了定量分析,综述了屋顶绿化研究的现状、前景和面临的挑战。通过构建CNKI总量和核心期刊2个数据库,发现屋顶绿化研究涵盖多个领域,呈现多学科参与的特点。2011年之前文献数量一直呈总体增加趋势,但最近2年则逐年减少。对SCI期刊数据库最近12年的文献检索发现,其年文献数量始终在增长,且研究重点逐步聚焦到生态与环境问题上,而不仅是屋顶本身。可为国内未来屋顶绿化的研究提供参考。
基金This study was supported by the National Natural Science Foundation of China(No.52074102)Foundation for Distinguished Young Talents in Higher Education of Henan(No.212300410006)+1 种基金Foundation for the Science and Technology Innovation Talents Project of Universities in Henan(No.22HASTIT010)Special Funds for Fundamental Scientific Research Expenses of Universities in Henan(No.NSFRF210202).
文摘The anchoring eccentricity of the bolt and cable bolt is a common problem in geotechnical support engineering and affects the ability of the bolt and cable bolt to control the rock mass to a certain extent.This paper reports on numerical simulation and laboratory experiments conducted to clarify the effect of eccentricity on the anchoring quality of the bolt and cable bolt,and to establish an effective solution strategy.The results reveal that the anchoring eccentricity causes unbalanced stress distribution and the uncoordinated deformation of the resin layer,which results in higher stress and greater deformation of the resin layer at the near side of the rod body.Additionally,as the degree of anchoring eccentricity increases,the effect becomes more significant,and the resin layer of the anchoring system becomes more likely to undergo preferential failure locally,which weakens the load-bearing performance of the anchoring system.This paper develops an innovative bolt anchoring rectifying device(B-ARD)and cable bolt anchoring rectifying device(C-ARD)on the basis of the structural characteristics of the bolt and cable bolt to better ensure the anchoring effect of them.The working effects of these two devices were verified in detailed experiments and analysis.The experimental results show that the anchoring rectifying devices(ARD)improve and ensure the anchoring concentricity of the bolt and cable bolt,which will help improve the supporting performance of them.The paper provides a convenient and effective method for improving the anchoring concentricity of the bolt and cable bolt,and provides a concept and reference for technical research on improving the effect of roof bolting.
