Experimental Study on Structural Form and Excavation Model of Urban Metro Cross Transfer Station with Super Large Cross Section and Shallow Excavation

Figure 8

Synthetic experiment system of the tunnel and surrounding rock. Test 1: we cast the surrounding rock proportionately and simulated the cross rock beam + heading method. Test 2: based on the test 1, we excavated the secondary cross tunnel from the side, adopting the win-side heading method after the excavation and support of the main tunnel.