PROJECT: TABRIZ METRO LINE 1
In Tabriz the first metro line of a future metro network will be constructed in 2006 and 2007. This first line will be underground and is from the East to the West of Tabriz and has a total length of 8,5 km. This line is consisted of 11 underground stations.
The whole line will be constructed using a tunnel boring machine (TBM). The line concerned passes underneath the historical city center, as well as a number of important archaeological sites, among which the Kaboud Mosque (approximately 300 years old).
Two single-track tunnel-tubes are to be drilled, each with an outer diameter of 6,880 mm. The tunnel-tubes will be bored using a TBM with an earth pressure balance shield (EPB). The tunnels will be bored through quaternary clay, sand and gravel deposits.
Arthe Civil & Structure bv, has in cooperation with the construction company Alamoot Bridge & Building Engineering Co. in the tender-phase the tender documents and technical qualification documents drawn up. In July 2005 the total project (design & construction) has been acquired by Alamoot and Arthe.
Engineering and consultancy works executed by Arthe Civil & Structure bv include the following subjects:
- Review and evaluation of all executed (soil-) tests and definition of the required additional test;
- Design and engineering of the auxiliary structures of the launch shaft;
- Evaluation of the designs for the start- and receivingshafts;
- Calculation of surface settlements due to tunnel boring process and the influence on buildings, monuments and archaeological sites;
- Design of the grout mix and the grouting process in general in relation to possible surface settlements;
- Analysis of face stability for the different soil types that may be encountered;
- Advise on the use of foam in relation to encountered soil types;
- Set-up of the starting procedure for the TBM;
- Lining calculations, design and dimension of the lining-segments (executed by Movares);
- Determination of the required soil improvements and consultancy concerning the best suitable techniques.
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