Major Tunnelling Projects along the Turkish Motorway NetworkMajor Tunnelling Projects along the Turkish Motorway Network

• Istanbul – Ankara Motorway: Izmit Tunnels (1987-1990), Bolu Tunnel (1990-2006)

• Tarsus Adana Gaziantep Motorway – Section 3: Tasoluk-, Ayran-, Kizlac- and Aslani Tunnels (1990 – 1998)

• Izmir-Aydin Motorway: Selatin Tunnel, Karsiyaka Tunnels (1988 – 2000)

Alignment of Bolu Mountain CrossingAlignment of Bolu Mountain Crossing

Bolu Tunnel – Elmalik Portal ViewBolu Tunnel – Elmalik Portal View

Bolu Tunnel - Theoretical Regular Cross-SectionBolu Tunnel - Theoretical Regular Cross-Section

Bolu Tunnel – Settlements and Reexcavation at Elmalik PortalBolu Tunnel – Settlements and Reexcavation at Elmalik Portal

Bolu Tunnel – Support Classes Option 3 and Option 4Bolu Tunnel – Support Classes Option 3 and Option 4

SH O TCRETE LIN ING, d = 40 cm

INTERM EDIARY CO NCR ETE LIN INGd = 60 cm

CO N CRETE INN ER LIN INGd = 60 cm

SH O TCRETE LIN ING, d = 30 cm

INTERM EDIARY CO NCR ETE LIN INGd = 80 cm

INN ER CO NCRETE LIN INGd = 60 cm

OPTION 3 OPTION 4

Bolu Tunnel – Damages due to Düzce EarthquakeBolu Tunnel – Damages due to Düzce Earthquake

Bolu Tunnel – Realignment after Earthquake on Nov. 12, 1999Bolu Tunnel – Realignment after Earthquake on Nov. 12, 1999

Initial Portal ASARSUYU

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Final Portal ASARSUYU

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R E A L IG N M E N T0 500

Bolu Tunnel – Seismic Joints at Concrete InvertBolu Tunnel – Seismic Joints at Concrete Invert

Bolu Tunnel – Seismic Joints in Inner Concrete LiningBolu Tunnel – Seismic Joints in Inner Concrete Lining

Opening of the Bolu Tunnel to Traffic in December 2006Opening of the Bolu Tunnel to Traffic in December 2006