Analysis on Ground Surface Settlement of Newly Built Tunnel under Existing Expressway

Abstract

Relying on the Beihuan tunnel project, the numerical calculation of the excavation of the newly built tunnel down-traversing the existing expressway is carried out. The ground settlement deformation law of the expressway under different excavation schemes is analyzed, and the applicability of Peck formula in the calculation of the influence scope of ground settlement is discussed. The results show that: the numerical calculation of surface settlement range corresponds to Peck formula predicted result well.