Contracting jv of Todini, Sarantopoulos and Odon advancing twin 9 km x 120 m² drives in marl, clays, and sand in presence of water using 12 m umbrella with 4 m overlap. Puntel two-boom drillrig handles umbrella drilling and holes for fibreglass rockbolts in face. $8 million equipment inventory includes two Cifa CSS 2 Spritzsystem and two Normet Spraymec shotcrete jumbos. Four self reacting formworks, one at each heading. Four faces have each advanced 250 m to date. Completion expected 2004. Contact sarant@aias.net.gr for more details. October 1999.Open call for bids, deadline 28th July, 2004 for completion of the Kallidromo tunnel on the Tithorea-Lianokladi section of the Athens-Thessaloniki line. A length of 2 x 6 km remains to be bored. To date, 3 km has been excavated but construction was stopped last year due to geological difficulties. Tender budget: EUR239 million. Visit http://ted.publications.eu.int/udl?request=Seek-Deliver&language=en&docid=093335-2004, OJ S 111, or contact Erga Ose, Athens, fax +30 2105283392. E-mail pakoukou@ergose.gr 25/04.Open call for bids, deadline 21st April, 2005 for completion of the Kallidromo tunnel on the Tithorea-Lianokladi section of the Athens-Thessaloniki line. The tunnel has two single track tubes, each approximately 9,260 m long. The Thessaloniki-bound right tube is 9,259.5 long while the Athens-bound left tube is 9,261 m long. The distance between both tubes ranges from 35 m to 65 m. Crosscuts are constructed every 500 m. Each cross section is 8.9 m wide and 9.2 m high. The height over the railtracks is 7.6 m. Every 25 m safety niches will be constructed on either side of the tunnel. Under a previous contract, 5,841.6 m of the tunnel has already been driven, 2,809.54 m of which from the south portal (1,437.99 m in the right tube and 1,371.55 m in the left tube) and 3,032.07 m from the north portal (1,589.68 m in the right tube and 1,442.39 m in the left tube), but construction was stopped in 2003 due to geological difficulties. The total remaining tunnel length to be excavated is approximately 12,230 m long, whereof 6,007.5 m in the right tube and 6,222.5 m in the left one. The remaining tunnel length where the final lining is to be installed is 13,025 m long (6,512.5 m in each tube). Six crosscuts were excavated, three of which from the south drive and three from the north. Cut-and-cover sections already built both at the south and north ends (south drive: 39.04 m in right tube and 37.86 m in left tube / north drive: 100.79 m in right tube and 138.2 m in left tube). To save construction time, the inner lining will be installed concurrently with excavation and support. Spoil removal (by loaders and trucks) and transport of construction materials through the crosscuts. Within the scope of the geological investigations, 14 sample boreholes were drilled and a detailed geological mapping of the project area was performed. The expected geological formations are a mix of clay and marl from km 6+625 to km 7+000 and conglomerate breccia from km 7+000 to km 7+090. The overburden is 150-220 m. To the south, at km 7+090 - 8+385 (right tube) and to the north at km 10+860 - 12+687 (right tube), limestone is expected. The overburden ranges between 160 and 360 m approximately. In the central section, between km 8+385 and 10+860 (right tube), the tunnel runs in a complex consisting of ophiolite layers. Serpentinite (SE) and schist serpentinite (SES) is mainly expected. In this section the overburden ranges from 300 to 530 m approximately. The Kallidromo tunnel will be excavated using the NATM method, according to the approved design. In the tunnel central section, advanced investigative drillings will be performed to identify zones with very low rock mass strength. During construction, the owner will implement an extended monitoring programme together with back analysis, to develop a comprehensive database to correctly select the suitable excavation and support methods. The tunnel will be excavated from four drives, simultaneously from the north and south faces. In the clay, conventional tunnelling in cross section of approximately 130 sq m, with support by means of fibre-reinforced shotcrete, approximately 40 cm thick, wiremesh, self-drilling anchors and fully grouted bolting, and fibre glass nails as temporary support at the face. In the limestone, drill/blast method in one or two phases in cross section of approximately 100 sq m, support by fibre-reinforced shotcrete, approximately 10 cm thick, and fully grouted sporadic bolting. In the serpentinite, drill/blast method or conventional tunnelling in one or two phases in cross section of approximately 110 sq m, with fibre-reinforced shotcrete, approximately 20-30 cm thick, wiremesh, steel arches, self-drilling anchors and fully grouted bolting, and fibre glass nails as temporary support at the face. Final reinforced concrete lining with a 25-60 cm thick metal formwork. Contractors are required to have constructed NATM tunnels (temporary support plus final lining) with minimum length of 2,300 m and cross section larger than 50 sq m. This is a rebid. Tender budget: EUR239 million, of which EUR188.1 million for the tunnel itself. Visit http://ted.publications.eu.int/udl?request=Seek-Deliver&language=en&docid=045595-2005, OJ S 47, or contact Erga Ose, Athens, fax +30 2105283392. E-mail pakoukou@ergose.gr 11/05.The lowest bidder for the Kallidromo rail tunnel is J&P Avax with an offer of EUR163,096,891.65 (-31.8% on the total budget). The contract was signed at 24th August, 2005 between ERGOSE and the contractor. Project to start in November. The project is for the completion of a 12.2 km twin tunnel, of which about half has been already excavated in each tube. The excavated cross section will be 100 sq m and the inner cross section 60 sq m. Also construction of crosscuts between both tubes. The project is scheduled to be concluded in 40 months. Click gr/17 for more. Visit www.jp-avax.gr 40/05.Open call for tenders, deadline 6th February, 2006 for construction of the Kallidromo twin bored tunnel (2 x 6 km). This is a re-bid, further to the cancellation of the contract signed in August 2005. Click gr/17 for technical details. Visit http://ted.publications.eu.int/udl?request=Seek-Deliver&language=en&docid=241776-2005, OJ S 245, or contact Erga Ose, Athens, fax +30 2105283392. E-mail pakoukou@ergose.gr 04/06.A JV of Aktor, Terna and J&P-Avax won a EUR178.7 million contract to build the Kallidromo twin bored tunnel (2 x 6 km). Click gr/17. Visit www.aktor.gr, www.terna.gr and www.jp-avax.gr 03/07.Open call for tenders, deadline 30th April, 2007 for preparation of tenders for the E&M equipment of the Kallidromo tunnel. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=58197-2007, OJ S 47, or contact Erga OSE, Athens, fax +30 3105283392. Click gr/17. 14/07.Erga OSE received a EUR191,200 to prepare the tenders for the E&M equipment of the Kallidromo tunnel. Visit www.ergose.gr 26/08.
JV Aktor, Terna and J&P-Avax has been awarded the EUR44 million contract to complete construction of Kallidromo twin bored tunnel (2 x 6 km). Contact Erga OSE, Athens, tel +30 2105283330, fax +30 3105283392. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=051391-2012, www.aktor.gr, www.terna.gr and www.jp-avax.gr. 11/12.
