YU Jin, XU Qiong-he, XING Wei-wei, et al. Numerical analysis of upwarping deformation of existing tunnels under a new tunnel’s excavation[J]. 2007, 28(S1).
YU Jin, XU Qiong-he, XING Wei-wei, et al. Numerical analysis of upwarping deformation of existing tunnels under a new tunnel’s excavation[J]. 2007, 28(S1).DOI:
The protection of the Longpan Tunnel’s excavation which are right beyond two existing shield tunnels of Nanjing No.1 subway is presented. Corresponding to unstabilizing condition and stabilizing condition with high-pressure chemical churning piles
the existing shield tunnel’s upwarping deformation during the excavation is analyzed with ANSYS software of 3-D elasto-plastic finite element method. It is observed that the tunnel’s upwarping deformations were too great without stabilizing and are safet with stabilizing. The calculated results are compared with the in-situ observation data.