The Interactional Analysis Of The Timbering Structure And Wall Rock In The Tunnel Of Transportation Water

The large-scale excavation is inevitable on the underground structural project. The unloading due to excavation and readjusted stress after the release of in-situ stress will endanger the stability of surrounding rock mass. The stability analysis of rock engineering is the core of research interest in engineering geology and rock mechanics. Whereas it is very important for the technique of grouted rock bolts timbering to stabilize the underground rock and is widely used at the same time. This paper takes into account mostly the two aspects of theoretic Analysis and numerical simulating.Fist of all, on the basis of the research of agone boffins, this author investigates the interaction mechanism of bolts and rock, and introduces the elastic梡lastic analytical resolution which is consist of the liner structure, the equivalent reinforced wall rock and the original wall rock in the simple loading from the equivalent well-proportioned view; this solution is very important meaning for the engineering design. On the basis of Coulomb friction model, the author introduces the finite element equation of the contact problem in order to provide the academic foundation for the application of MSC.MARC. Finally, combining the engineering practice of the non-linear analysis of shield tunnel through Yellow River of the south-north water transfer and using the model of friction, the author researched the evolution law of stress and displacement field in the structure of grouted rock bolts, and analyzed the effect to the stress and deformation of surrounding rock mass due to anchor supports.