High-speed railway tunnel entrance as the basis, combined with the actual engineering geological conditions, the establishment of a dynamic construction of three-dimensional model of tunnel entrance. With the analysis of soil excavated hole portion of the hole and the hole body during deformation movement of surface soil slope. The main conclusions are: (1) on the stepped portion of the hole excavation on the scope of the maximum slope excavation slope deformation rate in step fastest, over time, the deformation gradually converge. (2) along the longitudinal direction of the tunnel, the more monitoring points away from the hole excavation unit distance, the smaller the amount of deformation of the slope obtained its monitoring. By monitoring the cross-section point comparison, the spatial shape deformation monitoring data presented is rounded surface on the axis of the tunnel to tunnel excavation monitoring sites found greater impact, as an extension to both sides, affect the value gradually weakened. (3) by Yang slope settling cloud contrast slope under different cavity length of the inner body can be seen: With the entry of the mountain tunnel and increase the body, affecting Yang slope deformation area also increased to reflect the slope according to the monitoring point. Monitoring data, with the increase of the hole inside the mountain itself, the settlement value of the monitoring points are increased, and finally stabilized.
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