Mechanical Responses to Different Excavation Methods of Qichongcun Tunnel in Guiyang City, China

Figure 5

Construction sketch of the double-side guide pit method (1: the upper part of the left guide pit; 2: the lower part of the left guide pit; 3: the upper part of the right guide pit; 4: the lower part of the right guide pit; 5: the upper middle part; 6: the lower middle part; 7: the inverted arch).