深部巷道钢管混凝土支架承载性能研究进展
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  • 英文篇名:Research on load-bearing ability of steel tube confined concrete supports for deep roadway:State of the art
  • 作者:刘德军 ; 左建平 ; 郭淞 ; 王军 ; 李英杰 ; 张堂亮
  • 英文作者:LIU Dejun;ZUO Jianping;GUO Song;WANG Jun;LI Yingjie;ZHANG Tangliang;School of Mechanics and Civil Engineering,China University of Mining and Technology(Beijing);Key Laboratory of Geotechnical and Underground Engineering of Mining of Education,Tongji,University;School of Civil Engineering,Shandong Jianzhu University;
  • 关键词:钢管混凝土支架 ; 承载性能 ; 设计方法 ; 现场应用 ; 研究进展
  • 英文关键词:steel tube confined concrete supports;;bearing capacity;;design methods;;field application;;state of the art
  • 中文刊名:ZGKD
  • 英文刊名:Journal of China University of Mining & Technology
  • 机构:中国矿业大学(北京)力学与建筑工程学院;同济大学岩土及地下工程教育部重点实验室;山东建筑大学土木工程学院;
  • 出版日期:2018-11-15
  • 出版单位:中国矿业大学学报
  • 年:2018
  • 期:v.47;No.225
  • 基金:国家自然科学基金项目(5162240,51508584,51704176);; 中央高校基本科研业务费项目(2017QL02);; 中国矿业大学(北京)越崎杰出学者奖励计划项目;; 同济大学岩土及地下工程教育部重点实验室开放基金项目(KLE-TJGE-B1705)
  • 语种:中文;
  • 页:ZGKD201806005
  • 页数:19
  • CN:06
  • ISSN:32-1152/TD
  • 分类号:40-58
摘要
为掌握钢管混凝土支架承载性能的研究动态,从轴压构件、纯弯构件、偏压构件以及整体支架4个方面系统梳理了钢管混凝土支架承载性能室内试验、计算理论和数值研究的发展现状.在此基础上,详细分析了钢管混凝土支架的现场实践进展.最后,探讨了存在的不足及需要解决的若干关键技术问题.研究表明:支架承载性能研究较为系统,取得了较好的实践效果,初步形成了支架支护技术框架;通过在短柱承载力的基础上引入折减系数来计算支架整体承载力,但折减系数的取值依据不明确;除支架整体试验外,其他试验不能准确反映支架在巷道中的真实受力,后期应重点开展偏压承载试验;现有数值模拟方法不能有效揭示支架的破坏机制,套管接头以及材料间的界面模拟方法需要进一步研究;支架设计理论仍以实际经验为主,尚需考虑围岩、其他支护方式与支架之间的耦合作用机理,完善设计方法.
        To know the research state of load-bearing ability of steel tube confined concrete supports well,firstly,the development present situation was analyzed from the aspects of laboratory experiment,theoretical analysis and numerical simulation for axial compressed member,bent member,eccentrically compressed member and the whole support;and secondly,the status of field practice for steel tube confined concrete supports was sorted.Finally,some existent limitations and important technical problems need to be solved were clarified.The results show that:the study is comparatively systematic and the support is applied to some projects well,forming corresponding supporting technology system;It calculates the bearing capacity of the support by considering reduction coefficient based on the bearing capacity of concrete-filledsteel tubular stub column.However,the value basis of the reduction coefficient is not clear.Except the whole support experiments,the real force state of the support cannot be reflected by the other experiments.So,the eccentric loading experiments are important work in future.The existed numerical methods cannot reflect the failure mechanism of the support effectively,and the cannula connection and interface between different materials need to be researched further.It is not perfect for design theory of the support because it is stilled based on practical experience.And,the coupled action mechanisms between support,surrounding rock and other support methods should be considered.
引文
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