摘要
研究目的:介绍岩石损伤强度理论及工程应用尚存在的问题。探索研究成果在当前隧道设计施工中应用的可能性。对隧道"承载拱"形成机制、影响因素进行分析,探索提高围岩承载能力的途径。研究结论:(1)岩石损伤强度理论的研究成果与方法对隧道设计与施工具有指导意义,可在理念层面加以应用;(2)改善应力状态有助于提高围岩的承载能力;(3)围岩的承载能力是时间的函数,可以通过施工措施加以控制;(4)在地壳浅层,隧道设计荷载取决于应力状态和洞周围岩整体破坏的范围;(5)应重视施工措施对围岩承载能力的负面影响,施工过程必然在围岩中产生正、反2种作用,施工要做的是将正向作用发挥到极至;(6)尝试在宏观层面开展能量耗散与释放机制及相应超前探测技术研究,对加快隧道设计施工基础理论的科学化进程有积极作用。
Research purposes： This paper introduces the wall rock damage strength theory and the problems in application, discusses the current possibility of the theory being applied in tunnel design and construction, analyzes the formation mechanism of the load arch and its impact factors, and explores the way to improve the bearing capacity of surrounding rock.Research conclusions： （ 1 ） The research results and methods of rock damage strength theory may guide the tunnel design and construction, and can be applied in the design concept at macro - level. （2） Improverment of the stress state is helpful for enhancing the bearing capacity of surrounding rock. （3）The bearing capacity of surrounding rock relates to the time function and can be controlled by taking engineering measures. （4）In shallow stratum, the tunnel design load depends on the stress state and damage range of the rock around the tunnel. （5） More attention should be paid to the negative effect of taking the engineering measure on the bearing capacity of surrounding rock while the positive effect is given full play. （6）It is necessary to do the researches on the energy dissipation and release system and the technology for the survey in advance.
出处
《铁道工程学报》
EI
北大核心
2009年第3期38-42,共5页
Journal of Railway Engineering Society
关键词
耗散结构
岩石损伤
破坏准则
承载能力
应力状态
dissipation structure
rock damage
structural failure criteria
load ability
stress states
