TBM RECORDER TBM breakthroughs in Russia Sep 2012
Cat® News Release
- Caterpillar Tunneling recorded two key milestones in Russia in August 2012 and in partnership with Mostovik, one of the leading Russian underground contractors that owns and operates four Caterpillar Tunneling TBMs.
Novorossiysk oil pipeline tunnel breakthrough
- Two of those machines achieved breakthroughs for Mostovik after completing long tunnel drives. The first completed an oil transmission pipeline tunnel in Novorossiysk near the Black Sea and the second achieved breakthrough for the metro in the Siberian city of Omsk.
- The 3.86m Cat® RME152SE EPB completed a 3.23km tunnel for the oil transmission pipeline from Grushevaya oil depot to Sheskharis oil depot. The main geology encountered was clay, sandstone, clay stone and argillite. The tunnel is lined with rings of precast concrete segments to an i.d. of 3.3m. The TBM was launched in February 2011 and advanced beneath 400m of the Mount Markhotskiy Ridge overburden to achieve hole-through on 1 August. The contractor achieved a best daily advance rate of 15m and a best month of 264m.
- In Omsk, a 6.05m Cat RME238SE EPBM was used to excavate a metro tunnel with a total length of 1.56km. Construction of the metro system is becoming critically important to the fast growing city of Omsk.
Celebrations on the Omsk Metro
- Mostovik commemorated the TBM launch in June 2011, and the machine took a little less than 14 months to breakthrough on 6 August.
- The metro tunnel runs through soft ground conditions of clay, sandy clay and loam and is lined with precast concrete segment rings of 5.3m i.d.. Despite high ground water levels and difficult alignment requirements, the Cat TBM achieved 19.6m as the best one day advance rate and 180m as the best two-week performance. Mostovik is planning to relaunch the TBM for the second drive of this parallel tunnel section before the end of this year. The Omsk metro extension is expected to be in operation by 2016.
New York harbor crossing under way - TunnelTalk, September 2011
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