Abstract
Model tests on the closely constructed parallel shield tunnels are carried out in order to evaluate the longitudinal behavior of the existing tunnel due to the construction of new tunnel. from the tests, it is confirmed that the earth pressure acting upon the existing tunnel is changed according to not only the distance from the extreme point to the strip but also the difference of the bending rigidity of the strip.On this paper we tried to evaluate the earth pressure acting upon the existing tunnel by compared the data from the model tests with the 3-D FEM analysis for the model tests. The structural model in which ground is replaced with the suitable elastic springs is introduced. As a result, the model explained well the behavior of the existing tunnel.
