Study On Simulation Of Excavation Process Of Anlongpu Highway Tunnel

The construction of the tunnel and the underground engineering is a dynamic process, which is continuously changing in time and space. It is essential to anticipate and forecast the stability of the next construction object in the process of the construction. It is also an important question to technological and scientific researcher for all times.Based on the Anlongpu tunnel engineering of the Hurui national highway trunk-line in Guizhou Province Zhenning to Shengjingguan highway, The thesis consulted with technical tunnel's data and analyzed some tunnels abroad. On the foundation of the above-mentioned, this thesis has defined some essential physics parameters and classification of surrounding rock of tunnel. The paper simulates the two digging methods(step excavation and CRD excavation) that affect the tunnel stability by using ANYSYS8.0 finite element software and analyses the tunnel rock stress field and displacement field in the process of digging. The result shows that the adjacent rock's perturbation motion and the loads initial supported belong to the identical magnitude and there was not so much difference in both two digging methods. If the geological condition is better,I suggest that we should use the step method,or we can adopt the CRD excavation method.The model and the analyses method that the paper sets up can provide a reference for the structure design and construction of other geological condition tunnels.