Based on the Yanglin Tunnel of Kunming Expressway in Yunnan Province, combined with BIM technology, the research of tunnel parametric modeling, construction information management and BIM model and numerical model interaction method was carried out. Using Autodesk Revit software platform and based on Dynamo visual programming technology, a series of node packages for parametric modeling of highway mountain tunnel were developed, which effectively created tunnel route model, tunnel lining model, tunnel support model and geological model. Automatic procedures were developed for parameter information creation and input, and mass import of tunnel engineering data into BIM model was realized. The model interaction between Revit and Midas GTS NX was also realized based on the intermediate format file ". sat", and the model in the modeling section was simulated and fed back to the model. The research results can provide technical reference for the application of BIM technology in the design, construction, operation and maintenance of the whole life cycle of highway mountain tunnel and other underground belt projects.

Based on the Yanglin Tunnel, a 40 day uniaxial creep test of serpentine marble in the cracked section of the second lining was carried out. The results show that the steady creep rate and the corresponding creep strain law of serpentine marble under different stress conditions are positively correlated with the increase of stress and time. The long-term strength of serpentine marble measured by isochronous stress-strain curve inflection point method is 30 MPa. In this paper, the damage variable is introduced into viscoelastic and viscoplastic processes by using variable order fractional calculus, and a new elasto-viscoplastic creep constitutive model is obtained. The new elastic viscoplastic creep model can well describe the three-stage creep process of serpentine marble. Compared with the traditional Nishihara Model, this model overcomes the disadvantage that it cannot well describe the accelerated creep stage. The number of models is small and the combination is simple. It can be used to describe the deformation law of rock creep process.

Based on the complex function method of elasticity and the elastic-viscoelastic correspondence principle, the surrounding rock area of tri-central arch section on the physical plane (z plane) is mapped to the unit circle outer area on the computing plane (ζ plane), and two stress functions are used to express the stress, displacement and corresponding boundary conditions of the surrounding rock. Considering the space effect of the excavation face and expressing it as stress release rate, the viscoelastic displacement solution of the surrounding rock of the tunnel with tri-central arch section is given by means of power series method and Laplace transform. Compared with the numerical solution, the correctness of the theoretical solution is verified. This method is applied to the Yang Lin Tunnel, the variation of viscoelastic deformation of surrounding rock is analyzed, and the law of the effect of advancing speed, space effect and lateral pressure coefficient on the viscoelastic displacement of surrounding rock is revealed, it has universal application value for viscoelastic deformation analysis of surrounding rock of similar cross-section tunnel.