English：

The stability of the tunnel face is directly related to the construction safety and the controleffect of surface subsidence. To explore the applicability and reinforcement effect of different advancedreinforcement technologies, taking the shallow buried section of the Guizhou Dashao Tunnel as theengineering background, the pipe arch method and the new Italian tunneling method are compared andstudied by comprehensive field monitoring and three⁃dimensional numerical simulation. Based on Plaxis3D, a simulation model was established to simulate the response characteristics of surface settlement,tunnel vault displacement, and excavation surface extrusion under the two reinforcement methods. Theresults indicate that the new Italian tunneling method has a more significant improvement in the stabilityof the excavation face, especially under the condition of high reinforcement density ( 55 glass fiberanchors). The extrusion amount is reduced by about 57% compared with that of the pipe arch method,and the surface settlement control effect is increased by about 20%. The two reinforcement methods havethe same influence trend on the horizontal displacement of surrounding rock, but the new Italian tunnelingmethod has more obvious advantages in suppressing the displacement at the center of the tunnel.