Abstract:
Though underground tunnel construction is a common practice in developed countries, it is totally a new concept for a developing country like Bangladesh. This research deals with tunnel project under the river Karnaphuli, Bangladesh. As the soil condition of Bangladesh is not ideal for large scale construction, the construction of Karnaphuli tunnel posses many challenges like – extensive settlement, erosion of river bed, water pressure and proper tunnel lining design.
For numerical analysis of tunnel lining FEM-tij 2D a finite element programme has been used. Soil parameters of Karnaphuli River were collected from the soil investigation report conducted by China Communications Second Highway Survey, Design and Research Institute Co., Ltd. A numerical method Beam spring model was also simulated to compare the results between FEM analysis and BSM. It was observed that in FEM-tij model, simulation of tunnel lining behavior as per practical situation enables higher safety factor comparing the result of beam spring model
