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Cut & cover LRT tunnel in Norway
Zetková, Simona ; Růžička,, Pavel (referee) ; Uhrin, Michal (advisor)
The aim of the thesis is to design and assess a Cut and Cover tunnel for light rail traffic underpassing a busy road. The tunnel is a part of route extension to the airport. As a part of the design it is required to assess ground conditions, design phasing of constructions, demonstrate construction sequence, perform simplified structural analysis, compare drained and undrained tunnel design alternatives and draw reinforcement schemes. All mentioned requirements were successfully accomplished with help of corresponding Eurocodes, books and technical advice. According to structural analysis it was possible to design a structure which meets the requirements of rail traffic and local geological conditions. The phasing was designed such that the impact on traffic on the road is minimal. Using the high quality concrete and reinforcement bars enabled designing sustainable and safe structure for the planned traffic. The comparison of the alternatives demonstrated that both design alternatives are feasible and realistic. When internal forces are compared, it is obvious that higher values occurred on undrained alternative, and therefore cross-sections would have to be enlarged or the structure would have to be more reinforced, which would increase its price. Important advantage of drained alternative is easier construction. On the other hand, the impact on the environment would be much lower with the undrained tunnel.
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Cut & cover LRT tunnel in Norway
Zetková, Simona ; Růžička,, Pavel (referee) ; Uhrin, Michal (advisor)
The aim of the thesis is to design and assess a Cut and Cover tunnel for light rail traffic underpassing a busy road. The tunnel is a part of route extension to the airport. As a part of the design it is required to assess ground conditions, design phasing of constructions, demonstrate construction sequence, perform simplified structural analysis, compare drained and undrained tunnel design alternatives and draw reinforcement schemes. All mentioned requirements were successfully accomplished with help of corresponding Eurocodes, books and technical advice. According to structural analysis it was possible to design a structure which meets the requirements of rail traffic and local geological conditions. The phasing was designed such that the impact on traffic on the road is minimal. Using the high quality concrete and reinforcement bars enabled designing sustainable and safe structure for the planned traffic. The comparison of the alternatives demonstrated that both design alternatives are feasible and realistic. When internal forces are compared, it is obvious that higher values occurred on undrained alternative, and therefore cross-sections would have to be enlarged or the structure would have to be more reinforced, which would increase its price. Important advantage of drained alternative is easier construction. On the other hand, the impact on the environment would be much lower with the undrained tunnel.
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