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Léon-Asturias High Speed Rail, Pajares LOT 2

Construction inspection and scheduling for initial and final liner and waterproofing; analysing monitoring data and project's progress; daily site inspection and ground conditions reports.
Estimated cost: Commencement:
May 01, 2006
Completion date:
June 01, 2016
Avda.Tenerife 4
28700 S.S. de los Reyes Madrid
Technical data:
Geology description:

The predominant rock formation is the Lancara Formation consisting of dolomite, red limestone and gray limestone. The design groundwater head is 434 m.

Geology types:
Bid cost: Final cost:
$250 million USD
Service areas:
Construction methods:
Tunnel length:
25.7 km

The Pajares Rail Tunnel is part of the new Leon-Asturias High Speed Rail Line, and with a length of 25.7km one of the longest tunnels in the world. The project encompasses twin 10m dia. TBM hard rock tunnels, bifurcation chambers, cross passages, and emergency stops. The tunnel is lined with a pre-cast segmental lining made from high-strength with a thickness from 50 to 60cm. The connection between the access tunnel and the main tunnel requires the construction of a large-span Bifurcation Chamber and a short mined tunnel.

Numerical Analysis of Bifurcation Chamber
Completed Bifurcation Cavern