Study On Monitoring Of Baima Tunnel Excavation And Analysis On Stability Of The Slope

Based on the survey of geological conditions and features of the tunnel and through varied reconnaissance means, this paper, starting with comprehensive analysis of its geological surroundings, thoroughly discusses how the slope deforms during tunneling. In view of the fact that analysis of a slope stability is influenced by varied factors and a single method has certain limitations, the paper attempts to introduce limited difference method into the stability analysis of slope to make further analysis and assessment for the slope's stability and the distribution characters of strain and stress field under different working conditions.This research leads to such conclusions as follows:1. The slope stability is analyzed by geological method.2. The deformation characters of wall rock are monitored during tunnel excavation.3. By advanced penetrating test radar, the loose circle is detected. The rule of loose circle chanced could be obtained by this method.4. The effect of reliability of surface slope caused by explosion is monitored during tunneling. In regress result, vertical speed's K andαis bigger than horizontal regress value. This result shows that the vertical speed is bigger than horizontal speed in explosion of tunnel.5. FLAC program is used to simulate the tunnel in different depth. Thus the stress and strain field distributing character and surface subside are obtained in thesis. The result shows that the effect of tunnel to covered rock is reduced by depth of tunnel. The simulating result shows that the reliability of slope is effected stronger by small depth.