摘要
随着新奥法施工技术的广泛应用,围岩的动态变形越来越受到人们的关注。目前,我国主要是通过监测典型节点的位移来判断围岩变形的稳定性。典型节点的变形并不能代表整个围岩断面的变形状况,该方法存在一定的缺陷,因此提出采用隧道断面面积变化的方法来评价围岩变形的稳定性。采用突变理论数学方法计算Ⅳ级和Ⅴ级围岩在不同埋深条件下断面面积的变化值,得出面积变化的极限值,最终以此极限值作为判定围岩变形稳定的判据。
With the extensive application of the new Austrian tunneling method, the dynamic deformation of surrounding rock has attracted more and more attention. At present,the stability of surrounding rock deformation is judged mainly through monitoring the displacement of typical nodes in our country. As the deformation of a typical node can not represent the deformation of the entire surrounding rock section,the method has some defects. This paper puts forward a new method to evaluate the stability of surrounding rock deformation with reference to the change of tunnel section area. This catastrophe-theory-based mathematical method is used to calculate the change of the section area of IV and V grade rock in different depths and obtain the limit value of the area change,which is employed to determine the stability of surrounding rock deformation.
出处
《铁道标准设计》
北大核心
2017年第3期119-123,共5页
Railway Standard Design
基金
中央高校基本科研业务费专项资金资助(2682014CX065)
四川省交通科技项目计划(2012C14-1)
关键词
隧道
围岩稳定性
断面面积
突变理论
面积变化控制值
Tunnel
Stability of surrounding rock
Section area
Catastrophe theory
Control value of area change
