Mechanical Analysis of the Circular Tunnel considering the Interaction between the Ground Response Curve and Support Response Curve

Figure 1

The interaction between GRC and SRC. ① and ② are the same kind of support structure, but their construction time is different. ③ is another kind of support structure. The support structure ① is constructed immediately after the tunnel is excavated and accordingly its support workload is more than that of the support structures ②. And the support structures ② is constructed after a while when the tunnel is excavated and some displacement occurs in the surrounding rock, accordingly the support workload will be less.