Time-space united calculating method of stratum deformation considering repeated construction and cessation of tunnels

Now the time effect is not considered in calculating stratum deformation caused by tunnel excavation,and the tunnel construction course is even more not considered in deformation calculation.Based on the stochastic medium theory and according to the stratum deformation caused by element excavation,the stratum deformation time-space united calculating equation is deduced,and it can take into account the repeated construction and cessation of tunnels.A case of history calculation shows that the calculating method deduced is reliable.Then the time-space rules of stratum deformation caused by repeated construction and cessation of tunnels are discussed.When the tunnel construction stops for long time,the stratum deformation around the tunnel working face will grow to a great extent,which is harmful to the buildings on the ground near the tunnels.