作　　者： ; ; ; ;

机构地区： 吉林大学建设工程学院

出　　处： 《吉林大学学报（地球科学版）》 2010年第5期1110-1114,共5页

摘　　要： 隧道的超欠挖对衬砌结构稳定性有较大影响,研究超欠挖规律,对于了解围岩受力、保证施工安全具有重要意义。根据隧道断面轮廓超欠挖序列的统计自相似性,结合小波分析的多分辨率功能,采用小波分析计算分形维数的方法,对白鹤隧道47个断面轮廓进行分维数计算。断面轮廓分维数与岩体RMR和Q呈线性关系,随着RMR和lnQ的提高,断面轮廓分形维数将降低。断面轮廓分形维和隧道的围岩分类以及超挖百分比存在复线性相关关系。 The stability of lining structure is influenced by over-excavation and under-excavation of the surrounding rock of tunnel.It has great significance for understanding the surrounding rock stress and ensuring construction safety to research the law of over-excavation and under-excavation of the surrounding rock of tunnel.Based on the multi-resolution analysis of wavelet analysis and the statistical self-similarity on over-excavation and under-excavation of the surrounding rock of tunnel section profile,the fractal dimensions of 47 tunnel sections profile have been calculated by the wavelet analysis.There is a linear relationship between fractal dimension an RMR and Q rock mass classification.With the increase of RMR and lnQ values,the fractal dimension of tunnel section profile is decreased.Multiple correlations among fractal dimension of section profile,surrounding rock quality of tunnel,the over-excavation and under-excavation percentage are researched.A foundation to evaluate the stability of tunnel surrounding rock mass was established.

关 键 词： 小波分析 隧道围岩断面轮廓 分形 岩体质量 稳定性 隧道

领　　域： [天文地球] [天文地球] [天文地球]