Abstract— The design of tunnel cross section depends on the values of internal forces and deformations induced in the lining. These values are influenced by many factors such as type of soil, dimensions and shape of the tunnel. In the present study, a finite element analysis is proposed using computer program Adina version 8.5 (A finite element code for soil and rock analyses). A numerical model is presented as a plane strain problem taking into consideration the soil-structure-interaction .Mohr-Coulomb is used to model the nonlinearity of soft clay soil. Two node linear beam element is used to simulate the lining of the different three shape (circular, elliptical, and rectangle with circular arch) twin tunnels. The material of the lining was chosen as a reinforcement concrete. The effect of the change of soft clay soils using different values of the modulus of elasticity (Es) and the Poisson ratio (ν) in the tunnels internal forces and displacement and soil stresses at different case of loading for different shape of tunnels was studied. Also The effect of thickness-radius ratio (t/r) on the tunnels displacement, internal forces and soil stresses was studied .Also the ground surface displacement was studied at different shape and dimensions of different twin tunnels for different soft clay soil properties .The results show that the circular tunnel is best shape of twin tunnels in soft clay soil with different values for (Es) and (ν) . Design charts for the internal forces as well as settlement to predict the maximum bending moments as well as the maximum normal forces induced in the lining have been introduced.