Underground— EMEA— Austria— Tunneling
In particular, the AT – Drainage System was predestined for deep reaching drainage in highly variable formations. The system consists of an inner steel tube which is wrapped with a PVC-drainage pipe.
It can be employed temporarily as well as semi-permanently during drainage work parallel to tunnel advances. The AT – Drainage System is characterized by a rapid length adaptation achieved by piece-by-piece installation, with a simple lengthening of the drainage tubes also being possible in limited space at all times. Another important feature of the system is the high directional accuracy of the drainage drilling.
DSI supplied the Type AT – 76-DR Drainage System, T32 x 3,000mm AT – Drilling Rods, R32 shanks and R32-T32 transition pieces.
To provide immediate support in the open span area, DSI produced and supplied 3 bar, Types P50 / 20 / 30, P70 / 20 / 30, P95 / 25 / 30 as well as P130 / 25 / 30 PANTEX Lattice Girders including welded-on nut pairs, 1m long spacers and tilting bases with 3 struts. Excavation at the northern portal near St. Andrae was begun on April 24 th 2015, and the tunnel chain is scheduled for completion in 2020.
Owner ÖBB-Infrastruktur AG, Austria General Contractor Joint Venture, consisting of Implenia AG and Hochtief Infrastructure Austria, both Austria Construction Site Management Joint Venture, consisting of IL – Ingenieurbüro Laabmayr & Partner ZT GesmbH, IGT Geotechnik und Tunnelbau Ziviltechniker G. m. b. H. and iC consulenten Ziviltechniker GesmbH, all of them Austria
DSI Unit DSI Underground GmbH, Austria DSI Scope Production, supply DSI Products OMEGA-BOLT ® Expandable Friction Bolts, SN Anchors, DYWI ® Drill Hollow Bar System, AT – Tubespile TM, Ø 38 x 4 mm tube spiles, POWER SET Self-Drilling Vacuum Tube Spiles; Type AT – 76-DR Drainage System; 3 bar, Types P50 / 20 / 30, P70 / 20 / 30, P95 / 25 / 30 and P130 / 25 / 30 PANTEX Lattice Girders
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