Contractor, Bamtonnelstroy has reported the breakthrough last month of the second of it’s two Lovat rock TBMs currently deployed on the Sochi Project, where both machines have been used to build utility/escape tunnels in conjunction with the larger transport tunnels, being constructed from Adler to Krasnaya Polyana in preparation for the Russian 2014 winter Olympics.
The Lovat RMP167SE TBM, equipped with a rock cutterhead, completed its 2,848m drive on June 5, 2010. The machine began at South Portal of Tunnel Complex #5 and broke through at the North Portal.
The teams achieved an average advance rate of 14m per day, with a record month of 400m, and a record advance rate of 25m per day whilst boring through mudstones and sandstones with compressive strengths ranging from 40-60MPa.
Bamtonnelstroy’s other Lovat RME232SE Series 14701, 5.9m diameter TBM, also equipped with a rock cutterhead, completed its drive on May 28, 2010 (see picture). The drive started at the South Portal of Tunnel Complex #1 and broke through at the North Portal.
The total tunnel length of 2,300m (1,664 rings) was successfully completed in 311 days. The record month was set in April 2010, by boring 352m (251 rings). The second highest recorded month was in its initial stages of the drive achieving 301.2m (215 rings) in October 2009. The RME232SE encountered geology of sandstone and marl with a compressive strength of 50MPa.
The combined (rail and motor) road from Adler to the mountain resort Alpika-Service is nearly 48.2km long and will be the main access route for travelers to the 2014 Olympic Games.
The new Adler – Krasnaya Polyana road runs mainly on the left bank of Mzymta River. Twelve tunnels with the total length of 27km, and 45 bridges will be built along the alignment – six railway tunnels with the total length over 10km, 3 traffic tunnels (over 7km) and 3 service tunnels (over 9km). They are being built using both rock tunnelling with roadheaders and TBMs. The road is scheduled for completion in the 3rd quarter of 2013.
For a video of the Lovat in action cut and paste this link into your browser: http://www.skmost2014.com/video/viewvideo/35