Abstract Underground works are restricted by the surrounding soil masses and their dynamic reflection is different from that in surface engineering. If the vibration method for surface engineering is adopted for time-history analysis and calculations in underground works, corresponding improvements must be made as it cannot reflect the essential wave effect on underground works with respect to the boundary conditions of the calculation model and the time effect of wave propagation. By means of contrastive analysis, an improvement is made regarding the conventional vibration method. As for the improved vibration method for the dynamic time-history calculation of underground works, the calculation model uses the artificial boundary condition of two viscoelastic sides with fixed constraint bottoms as well as the dynamic layered acceleration for wave input. The calculation results agree with the theoretical ones very well and demonstrate the capability of the dynamic time-history calculation for underground works.
Abstract：
Underground works are restricted by the surrounding soil masses and their dynamic reflection is different from that in surface engineering. If the vibration method for surface engineering is adopted for time-history analysis and calculations in underground works, corresponding improvements must be made as it cannot reflect the essential wave effect on underground works with respect to the boundary conditions of the calculation model and the time effect of wave propagation. By means of contrastive analysis, an improvement is made regarding the conventional vibration method. As for the improved vibration method for the dynamic time-history calculation of underground works, the calculation model uses the artificial boundary condition of two viscoelastic sides with fixed constraint bottoms as well as the dynamic layered acceleration for wave input. The calculation results agree with the theoretical ones very well and demonstrate the capability of the dynamic time-history calculation for underground works.
.Application of the Improved Vibration Method
to Dynamic Time-History Calculations for Underground Works[J] MODERN TUNNELLING TECHNOLOGY, 2013,V50(3): 66-71
2013, Vol. 50 