Technical specifications

Scope of works:

  • Foot and cycle path tunnel, length 114.77 m, max. clear width 6.45 m, clear height approx. 4.22 m.
  • Tunnel structure with double lining, driven using the drill and blast method with reinforced/unreinforced sprayed concrete lining and anchors protecting against caving in and deformation.
  • Umbrella waterproofing with plastic sheeting and a sidewall drainage system.
  • The concrete inner lining is reinforced in the portal areas, with steel fibres within the standard area of the mined tunnel.
  • The carriageway will be constructed on the open rock floor.
  • The north portal block is to be aligned to the slope.
  • The south portal will be redesigned with its ascent to the Georgsberg mountain.

Special feature:

  • State-of-the-art technology is used for blasting, as the buildings extend to a minimum distance of 8m from the excavation soffit and some of them are listed as historic buildings.

Construction method

  • Drill and blast

Geology

  • slaty pearl gneiss

General data

Project
Georgsberg Foot and Cycle Path Tunnel, Passau

Client
City of Passau

Contractor
Wayss & Freytag Ingenieurbau AG

Construction time
July 2023 to May 2023

Construction sum net
€ 3.5 million

 

Utilisation
Infrastructure
Type
Foot and cycle path tunnel
Length
114.77 m
Construction Method
Drill and blast
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