W&F Ems-Dollart-Crossing

Ems-Dollart-Crossing

Netherlands

Ems-Dollart-Crossing

Netherlands

Ems-Dollart-Crossing

Netherlands

Technical specifications

Scope of work

Tunnel for a gas pipeline
Length: approx. 4,050 m
Internal diameter: 3.0 m
start and target shaft
installation of the gas pipeline in the tunnel
using the floating method and subsequent backfill grouting of the tunnel
extensive soil investigation

Construction method

TBM tunnelling using a Hydroshield (slurry shield)
Shield diameter: 3.6 m
Steel fibre reinforced segmental lining
Wall thickness 25 cm

Geology

Potklei (local type of clay)
Sands
Clays

General data

Project

Ems-Dollard Crossing between Germany and the Netherlands
tunnel for a gas pipeline

Client

Nederlandse Gasunie

Contractor

Wayss & Freytag Ingenieurbau AG
in a joint venture

Construction period

June 2008 to September 2010

Construction costs

€ 45.7 million

Related Projects

Utilisation

Media / Supply

Type

Cable tunnel

Length

4,050 m

Construction Method

TBM tunneling using a Hydroshield (slurry method)

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Rehabilitation of the water reservoir ensures the flood protection in the Isar valley. The construction section comprises the construction of the seepage water tunnel as well as the access structures at both ends of the tunnel.