Alternative Route For Tecer-Kangal Railway Alignment – Turkey

Project Name: Alternative Route For Tecer-Kangal Railway Alignment

Country: TURKEY

Finance Source: Government

Tags: Turkey, Local, Transport, Design

2300 m section of the 5410 m long tunnel, the construction of which has started in 1974, was bored until 1982. At this stage, a collapse occured by groundwater pressure and 900 m of the tunnel became unreachable. At the end of investigations carried out by different expert foundations, it was concluded that it was impossible to treat and use the collapsed part of the tunnel. Thus, it was decided to construct an alternative tunnel of 1700 m long parallel to the old alignment. It was requested from Temelsu to carry out the engineering and consultancy services including the design of the alternative tunnel, the boring technique and the treatment precautions in the bored sections of the tunnel.

Typical tunnel cross-section is modified horse-shoe. The width and the height of the tunnel are 5.00 m and 6.10 m respectively and the lining thickness varies between 50 cm and 122 cm. The slope of the tunnel is approximately 1%.
The layout plans, detailed design of inside of the tunnel and its lining, statical and stability calculations of the alternative tunnel were carried out by finite elements method and special drainage precautions were developed for the section of the tunnel in groundwater. The Contractor firm TÄ°NSA Trade and Construction Ltd.Co. nominated TEMELSU at the beginning 1985. The services were completed within 4 months.