关于挤压性围岩隧道大变形的探讨和研究

Discussion and study on large deformation of tunnel in squeezing ground

当前挤压性围岩大变形问题已引起隧道工程界的高度重视 ,但系统研究并不多 ,至今亦未列入设计规范。文章根据大变形的机理 ,提出了大变形的定义以及现场判定和预测方法 ,并按照主动法的整治原则提出了针对不同程度大变形隧道的设计与施工建议 。

At present, the problem of large deformation of tunnel in squeezing ground has been paid extreme attention by tunnellers. But few systematic studies on it were done, and then, it has not been included into the design code. In this paper, on the basis of studies on the mechanism of large deformation, the definition, in-situ assessment and predicting method are presented. The design and construction methods for large deformation in different degree are proposed in principle of active treatment, which can be referred by design, construction and later regulations.