Waldau Canal, Worblaufen, Microtunneling DN 1200

Three sections of the Waldau Canal to the ARA Worblental were largely replaced between shafts KS 7.68 and 7.106 using microtunnelling. It crosses, among others, under the River Worble, RBS rail tracks and three buildings. The existing concrete DN 1000 pipe from 1915 was replaced.

Length:

  • Stage 2: approx. 200 m
  • Stage 3: approx. 230 m
  • Stage 4: approx. 260 m

Main Data

  • Nominal diameter: 1,200 mm / 1,500 mm
  • Pipe material: Reinforced concrete, single-layer, 145 mm
  • Length of pipe: approx. 690 m
  • Advance rate: approx. 8 m/d; max. 27 m/d in single shift system
  • Gradient: min. 4.85 % ; max. 24.8 %
  • Covering: min. 1.10 m ; max. 4.60 m
  • Radii: horizontal 175 m
  • Flow capacity: 0.3–2.0 m3/s
  • Geology: Groundwater, rock, molasse, moraine, loose rock

Client

ARA Worblental Municipal Association

Consultant

IUB Engineering AG in consortium

Construction period

2006-2007

Construction costs

CHF 5 Mio.

Scope of services

  • Preliminary project and detailed project
  • Construction project
  • Tendering and bid evaluaton
  • Implementation
  • Construction supervision