摘要
以湖南某高应力软岩隧道为背景,应用有限元软件ABAQUS对其施工的时空效应进行了分析,并对其影响范围及大小进行了研究,结果表明:高应力软岩隧道围岩稳定很大程度上受到隧道的"空间效应"及"时间效应"的影响,同时指出在施工时应尽早施加初期支护提高围岩自承能力,在围岩变形趋于稳定时施加二次支护坚决抑制软岩的流变所引起的大变形.
This paper is based on the high stress soft rock tunnel in Hunan.The space-time effect of the construction process is analyzed with the finite element software ABAQUS,and the scope and size of effect to the surrounding rock is studied.The results show that：the stability of the soft surrounding rock is greatly affected by the ＂space effect＂ and ＂time effect＂.During the process of constructing the tunnel in high stress soft rock,the first support structure should be established as soon as possible in order to improve the self-bearing capability of the surrounding rock.And the secondary support structure must be established when the deformation of the surrounding rock keeps stable to suppress the large deformation of surrounding rocks for the rheological properties of soft rock.
出处
《南华大学学报（自然科学版）》
2011年第1期28-32,共5页
Journal of University of South China：Science and Technology
基金
湖南省自然科学基金资助项目(07JJ6167)
关键词
高应力软岩
围岩稳定
三维数值分析
流变
时空效应
high stress soft rock
stability of surrounding rock
3-D numerical analysis
rheological Properties
time-space effect
