Çubukbeli Tunnel, classification systems, rock mass strength parameters, excavation and support systems, finite element analysis

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2010

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Karahan, Ercüment

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In this thesis, suggestion of appropriate excavation and support systems and selection of rock mass strength parameters for the determination of these systems were carried out for the Çubukbeli Tunnel in Antalya. Çubukbeli Tunnel is a twin tube flute shaped tunnel with 1985 m length, 12 m width, 10 m height and maximum overburden thickness of 130 m. The tunnel area consists of limestone, clayey limestone, claystone, marl and siltsone. Rock mass classification systems are used for evaluation of rock mass characteristics and estimation of strength parameters. Selection of appropriate numerical method and software tool, namely Phase2, is accomplished after an extensive literature survey. The rock mass was divided into sections according to the RMR, Q, NATM and GSI classification systems along the tunnel and excavation and support systems were determined empirically along these sections. Thereafter, geomechanical parameters (i.e. modulus of deformation Em, Hoek-Brown material constants m and s etc.) were selected based on these classification systems. Finite element analysis was carried out as the final step of the design in order to investigate deformations and stress concentrations around the tunnel, analyze interaction of support systems with excavated rock masses and verify and check the validity of empirically determined excavation and support systems. As the result of design studies accomplished along tunnel route, B1, B2, B3 and C2 type rock classes are assumed to be faced during construction of Çubukbeli Tunnel and appropriate excavation and support systems are proposed for these rock classes.

Subject Keywords

Mining engineering.

URI

http://etd.lib.metu.edu.tr/upload/12611569/index.pdf
https://hdl.handle.net/11511/19289

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

E. Karahan, “Çubukbeli Tunnel, classification systems, rock mass strength parameters, excavation and support systems, finite element analysis,” M.S. - Master of Science, Middle East Technical University, 2010.