Analysis of Shield Tunnels Undercrossing an Existing Building and Tunnel Reinforcement Measures

Research on tunnel excavation has rarely considered the effect of a complete building. Therefore, this paper building with double basement and piles, three-dimensional finite-element model for shield tunnels undercrossing an existing was established to study effects double-shield displacement internal forces soil, segments, buildings. Grouting reinforcement technology used in analyze grouting pile subsidence. The results showed that every 100 kPa increase pressure, maximum subsidence soil reduced by 3.512 mm. successive resulted elliptical segments. longitudinal transverse stresses segments were effectively pressure 250 kPa. had obvious nonlinear lateral piles along direction When using deep-hole reinforcement, increasing radial radius adjusting range.