NATM Theoretical Analysis And Applied Research In Project

Being a widely used method in tunnel and underground project, the scientific of principle and content of NATM have been comprehensive accepted. In this article we aim at analyzing the NATM construction principle, introducing the construct way and construct procedure, and simulating the construction process By Finite Element Method. In the end, with the example of Guangzhou underground railway, using Finite Element program we can get the stress and deformation of mother rock.This article has four sections. In the first, the essential of NATM and the theory of tunnel design have been introduced, and some possible problems are represented; In the second, this article has a research on the support theory and support method, and analyze the stress and deforming of lining, formulate the mechanism of action of the supporting. In the third, the construct process detailed and the method of Finite Element analog are introduced; In the end, through case study and outcome comparing. The deforming law of adjacent rock can be got.