Analysis on the influence of large diameter earth pressure balanced shield tunnel under the existing expressway construction
By analyzing the construction impact of a large-diameter earth pressure balance shield tunnel crossing an existing expressway,the current deformation and settlement control standards of the ex-pressway and the changes in the construction impact of the existing expressway under different rein-forcement measures are studied.The research results indicate that the maximum deformation of the roadbed under unreinforced conditions is 28.6 mm,the maximum settlement deformation of the roadbed in the reinforcement condition is 17.3 mm.Comparative analysis shows that the grouting reinforcement inside the tunnel has a significant effect on controlling surface settlement and deformation,so it is necessary to carry out grouting reinforcement inside the shield tunnel during the excavation process.
NETL
NSTL
万方数据
