隧道软弱围岩相似材料的力学性能试验  

Mechanical Properties of Similar Materials for Soft Rock in Tunnel

作　　者：王抒[1] 张顶立[1] 房倩[1] 

机构地区：[1]北京交通大学隧道及地下工程教育部工程研究中心,北京100044

出　　处：《华侨大学学报（自然科学版）》2010年第6期680-683,共4页Journal of Huaqiao University(Natural Science)

基　　金：国家重点基础研究发展计划(973)项目(2010CB732100);铁道部科技研究开发计划重大项目(2009G005)

摘　　要：基于相似理论和量纲分析法,将弹性模量作为铁路隧道软弱围岩的研究指标,推导出其相似指标.以重晶石、石英砂和凡士林等混合物作为铁路隧道软弱围岩的相似材料,通过应力控制式三轴试验仪进行常规三轴试验.并利用非线性回归分析的方法对实验结果进行分析,得出相似材料配比与弹性模量的变化规律.最后,给出估算这类相似材料中的重晶石等重要组分的含量与弹性模量的函数关系,以用于在实践中确定与隧道软弱围岩相适应的相似材料混合比.Based on similarity theory and dimensional analysis,adopting elastic modulus as the research index of soft rock in railway tunnel,a similarity index is deduced.Taking the mixture of barites,quartz sand and Vaseline as similar materials for soft rock,a similarity simulation test is conducted through conventional stress-controlled triaxial apparatus.Analyzing the experimental results by the method of non-linear regression,the mixture ratio of similar materials and the variation of elastic modulus are obtained.The function to estimate the relationship between elastic modulus and the content of essential component of similar material such as barites is got,which can be used to make the appropriate similar material in model experiment of tunnel soft rock.

关 键 词：软弱围岩 铁路隧道 弹性模量 相似材料 非线性回归 

分 类 号：U452.12[建筑科学—桥梁与隧道工程]